The document describes a 5V low-drop fixed voltage regulator. It has features like output voltage tolerance of ≤ ±2%, input voltage up to 42V, overvoltage protection up to 65V, and is suitable for automotive electronics. It provides concise summaries of key specifications like output voltage, current limits, reset timing thresholds, and watchdog timing behavior in 3 sentences or less.
The NCP1032 is an integrated circuit that can be used to implement switching regulator applications with minimal external components. It contains all the active power control logic and protection circuitry needed, including an on-chip high voltage power switch, startup circuit, fixed frequency oscillator up to 1 MHz, and current limit, soft start, and thermal protection features. It is well-suited for applications requiring up to 3W output in isolated power supplies for telecom and medical equipment.
The TPS65023 is an integrated power management IC that provides three highly efficient step-down converters and two low-dropout regulators. It is designed to power applications running from a single lithium-ion battery cell, such as digital media players and digital cameras. The IC includes a 1.5A step-down converter for the processor core, a 1.2A converter for system voltage, and a 1A converter for memory voltage. It also has a 30mA low-dropout regulator for real-time clock functions and two 200mA general-purpose low-dropout regulators. All components are selectable and configurable through the IC's serial interface.
The document discusses a simulation of a quasi-resonant switching power supply using an FA5541 controller chip. The simulation results show:
1) The output voltage is regulated at 19V with a maximum current of 5A and an output ripple voltage of approximately 17.5mVP-P.
2) Waveforms of the output responding properly to a step change in load from 3A to 5A.
3) The start-up sequence, showing the controller turning on after the voltage on the VCC pin charges and the auxiliary winding takes over once VCC reaches its threshold.
This document provides instructions for configuring IEC 61850, GOOSE, FTP, and HTTP communication for Easergy P3 devices. It describes setting the main IEC 61850 configuration parameters such as IED name, logical nodes, data sets, and redundancy protocol. It also explains how to configure GOOSE publishing and subscribing, as well as file transfer using FTP. The document contains step-by-step examples for common configuration tasks.
Study of vco_Voltage controlled OscillatorNeha Mannewar
Voltage controlled Oscillator,Voltage controlled oscillator is a type of oscillator where the frequency of the output oscillations can be varied by varying the amplitude of an input voltage signal.Voltage controlled oscillators are commonly used in frequency (FM), pulse (PM) modulators and phase locked loops (PLL). Another application of the voltage controlled oscillator is the variable frequency signal generator itself.
The LMC6953 is a voltage supervisor chip designed to meet PCI specifications. It monitors the 5V and 3.3V power supplies for out of range voltages, power failures, and manual resets. When any fault is detected, it asserts an active low reset (RESET) signal for 100ms to reset associated devices. It has built-in voltage reference and reset delay circuitry requiring minimal external components.
The document describes the BQ32000 real-time clock device. It features an automatic backup supply, I2C interface, integrated 32.768 kHz oscillator, and programmable calibration adjustment. The device uses very little power and is compatible with industry standard RTCs. It can be used in general consumer electronics applications to keep time even during power loss events.
The document describes a dual voltage regulator chip called the LDRxxyy. It has the following key specifications:
- It provides two independent voltage regulation channels, each able to supply up to 500mA or 1A respectively with low dropout voltages of 0.3V and 0.4V.
- It has very low quiescent current draw of only 50uA in off mode and 1.6mA maximum in on mode.
- Each output voltage channel can be independently enabled or shut down via logic control for low power applications like PDAs and data storage devices.
- The chip comes in PPAK and SPAK-7L packages and is suitable for applications from low noise
The NCP1032 is an integrated circuit that can be used to implement switching regulator applications with minimal external components. It contains all the active power control logic and protection circuitry needed, including an on-chip high voltage power switch, startup circuit, fixed frequency oscillator up to 1 MHz, and current limit, soft start, and thermal protection features. It is well-suited for applications requiring up to 3W output in isolated power supplies for telecom and medical equipment.
The TPS65023 is an integrated power management IC that provides three highly efficient step-down converters and two low-dropout regulators. It is designed to power applications running from a single lithium-ion battery cell, such as digital media players and digital cameras. The IC includes a 1.5A step-down converter for the processor core, a 1.2A converter for system voltage, and a 1A converter for memory voltage. It also has a 30mA low-dropout regulator for real-time clock functions and two 200mA general-purpose low-dropout regulators. All components are selectable and configurable through the IC's serial interface.
The document discusses a simulation of a quasi-resonant switching power supply using an FA5541 controller chip. The simulation results show:
1) The output voltage is regulated at 19V with a maximum current of 5A and an output ripple voltage of approximately 17.5mVP-P.
2) Waveforms of the output responding properly to a step change in load from 3A to 5A.
3) The start-up sequence, showing the controller turning on after the voltage on the VCC pin charges and the auxiliary winding takes over once VCC reaches its threshold.
This document provides instructions for configuring IEC 61850, GOOSE, FTP, and HTTP communication for Easergy P3 devices. It describes setting the main IEC 61850 configuration parameters such as IED name, logical nodes, data sets, and redundancy protocol. It also explains how to configure GOOSE publishing and subscribing, as well as file transfer using FTP. The document contains step-by-step examples for common configuration tasks.
Study of vco_Voltage controlled OscillatorNeha Mannewar
Voltage controlled Oscillator,Voltage controlled oscillator is a type of oscillator where the frequency of the output oscillations can be varied by varying the amplitude of an input voltage signal.Voltage controlled oscillators are commonly used in frequency (FM), pulse (PM) modulators and phase locked loops (PLL). Another application of the voltage controlled oscillator is the variable frequency signal generator itself.
The LMC6953 is a voltage supervisor chip designed to meet PCI specifications. It monitors the 5V and 3.3V power supplies for out of range voltages, power failures, and manual resets. When any fault is detected, it asserts an active low reset (RESET) signal for 100ms to reset associated devices. It has built-in voltage reference and reset delay circuitry requiring minimal external components.
The document describes the BQ32000 real-time clock device. It features an automatic backup supply, I2C interface, integrated 32.768 kHz oscillator, and programmable calibration adjustment. The device uses very little power and is compatible with industry standard RTCs. It can be used in general consumer electronics applications to keep time even during power loss events.
The document describes a dual voltage regulator chip called the LDRxxyy. It has the following key specifications:
- It provides two independent voltage regulation channels, each able to supply up to 500mA or 1A respectively with low dropout voltages of 0.3V and 0.4V.
- It has very low quiescent current draw of only 50uA in off mode and 1.6mA maximum in on mode.
- Each output voltage channel can be independently enabled or shut down via logic control for low power applications like PDAs and data storage devices.
- The chip comes in PPAK and SPAK-7L packages and is suitable for applications from low noise
Constant Current Switching Regulator for LEDs with ON/OFF Function: NCP3066Premier Farnell
This document provides information about the NCP3066 constant current switching regulator for LEDs with ON/OFF function from On Semiconductor. It includes details about the features and applications of the NCP3066, descriptions of its internal block diagram and operation, and test procedures for evaluation boards demonstrating buck, boost, and SEPIC configurations.
(1) The document describes a current mode quadrature oscillator circuit using a current differencing transconductance amplifier (CDTA). (2) The circuit produces two output currents with a 90 degree phase difference between them. (3) The CDTA is a five-terminal active element that consists of an input current differencing stage and dual output transconductance stage.
This document describes the design of a low dropout voltage regulator (LDO) circuit. It includes the goals of providing a 3.3V output voltage from a 5V input. The key components of an LDO - pass transistor, error amplifier, and voltage reference - are discussed. Calculations are shown for efficiency, transistor sizes, setting the bias voltage, and sizing additional transistors. A block diagram and final schematic are presented. Post-layout simulations demonstrate the line regulation as the input voltage is changed.
This document describes the TPS31xx family of ultra-low supply current/voltage supervisory circuits. The circuits provide power on reset and voltage monitoring functions for systems powered from 0.9V to 3.3V. They have precision voltage thresholds as low as 0.9V, supply currents of 1.2uA, and reset outputs that can be open drain or push pull. The devices monitor the supply voltage and provide a reset output if the voltage drops below the threshold. They are available in a small SOT-23 package and are suitable for use in low power applications.
Summary
1. ON Semiconductor has solutions for all low power offline driver topologies: Flyback, Buck-Boost, Buck-Boost, Linear
2. Primary Side Control approach optimized for tight accuracy and wide Vf support for high production yield and reduced development time
3. General shift in market to address non-isolated topologies
This document provides information on the NodeMCU development board. It is an open source firmware and development kit based on the ESP8266 WiFi chip. The board consists of an ESP-12E module, CP2102 for USB to UART connectivity, and a USB connector. It has 8 digital input/output pins and 1 analog input. The board uses the Lua scripting language and the NodeMCU firmware to program the ESP8266 without recompilation. It is a low-cost and compact option for WiFi development.
The SN75176A is a bidirectional transceiver that operates from a single 5V supply. It combines a 3-state differential line driver and differential line receiver. The driver can handle loads up to 60mA and features current limiting and thermal shutdown protection. The receiver has a minimum input impedance of 12kΩ and input sensitivity of ±200mV. It is designed for use on multipoint bus lines in noisy environments.
The STR-X6737 IC is a quasi-resonant switching regulator designed for power supply applications up to 280W. It features a soft switching mode to reduce switching losses and noise, bottom-skip mode to improve efficiency over the load range, and various protection modes. The IC integrates a MOSFET and controller on a TO-3P package for simplified design. It provides lower EMI noise than conventional PWM solutions above 2MHz switching frequency.
The UTC 4051 is an 8-channel analog multiplexer/demultiplexer chip that allows for digitally controlled switching of analog signals. It has three binary control inputs, an inhibit input, and features low on impedance and very low off leakage current. The chip supports analog signal switching across a wide voltage range of 3V to 18V.
The 74HC73 is a dual negative edge triggered JK flip-flop integrated circuit with individual inputs and outputs. It features low power dissipation, ESD protection up to 2000V HBM, multiple package options, and operates from -40°C to +80°C or -40°C to +125°C. The device has J, K, clock and reset inputs that control the complementary Q and not-Q outputs on each flip-flop based on the signal edges.
This document provides specifications for Texas Instruments' μA7800 series of positive voltage regulators. The μA7800 series includes 5 models of 3-terminal positive voltage regulators (μA7805, μA7808, μA7810, μA7812, μA7815) that can provide regulated output voltages of 5V, 8V, 10V, 12V, and 15V respectively, with an output current of up to 1.5A. The document includes details on electrical characteristics, thermal properties, ordering information and package types for each model.
XLSEMI XL140 2A 380KHz 18V Buck DC to DC Converterdegarden
The XL1410 is a 380KHz fixed frequency buck converter capable of supplying 2A loads from 3.6V to 18V input voltages. It requires few external components and has high efficiency, low ripple, and excellent line and load regulation. Key features include adjustable output from 1.222V to 16V, 100% maximum duty cycle, internal MOSFET, and protections such as overcurrent, short circuit, and thermal shutdown. It is available in an 8-pin SOP package.
- A new voltage-mode control scheme for buck converters improves performance at high frequencies by starting the ramp signal earlier, producing minimal jitter even at narrow duty cycles.
- Test results show the new scheme achieves jitter as low as 1.3ns at 1.5MHz switching frequency, compared to over 30ns for traditional control.
- The new scheme also enables monotonic start-up and allows higher bandwidth operation using fewer output capacitors.
This technical brief provides a circuit description and troubleshooting information for a 70155 power supply. It describes the AC input protection, full-wave rectifier/doubler circuit, switcher start-up sequence, 5V voltage regulation circuitry, 24V and negative voltage supplies, calibration procedures, common troubleshooting issues, and typical waveform diagrams. The purpose is to serve as a reference for repair departments to support a product that is beyond its production cycle without manufacturer assistance.
This document provides information on the MJE13003 NPN silicon transistor from Unisonic Technologies Co., Ltd. It describes the transistor as being designed for high-voltage, high-speed power switching in inductive circuits. Key features include a reverse biased safe operating area with inductive loads up to 1.5 amps and a typical fall time of 290ns at 1 amp and 100°C. The transistor has applications in switching regulators, inverters, motor controls, solenoid drivers, and deflection circuits. Electrical characteristics and maximum ratings are provided in tables and graphs.
Designed a microwave amplifier circuit with a required bandwidth of 250MHz at a center frequency of 3.7GHz experiencing 6.5dB gain within Keysight ADS.
The L293 and L293D are integrated circuits that provide bidirectional current of up to 1A and 0.6A respectively to drive devices such as motors and solenoids. They have separate voltage supply inputs for logic and power, with a range of 4.5V to 36V. Each device has four driver channels that are paired and enabled together, with internal diode protection for inductive loads.
The document introduces the LT1965 low noise, low dropout linear regulator. It provides an overview of low dropout regulators and describes the key features of the LT1965, including its wide input voltage range of 1.8V to 20V, adjustable output voltage range of 1.2V to 19.5V, low noise of 40uV RMS, and various protection features. Application examples are provided, including using multiple regulators in parallel for higher output currents. Performance metrics like low dropout voltage and quiescent current are examined. The LT1965 is compared to similar regulators and additional resources for purchasing and support are listed.
This document provides information on the RT7257E, a 3A synchronous step-down DC-DC converter. It can deliver up to 3A of output current from an input supply of 4.5V to 17V and has a fixed switching frequency of 340kHz. The converter uses current mode control and has features such as cycle-by-cycle current limiting, soft-start, and thermal shutdown protection. It is available in an SOP-8 package and is suitable for applications such as wireless routers, LCD monitors, and green electronics.
The PT4115 is a step-down LED driver that operates from 6-30V and provides up to 1.2A of output current. It uses high-side current sensing and has a DIM input that allows for PWM or DC dimming from 5000:1 to 25:1. It is available in SOT89-5 and ESOP8 packages and is designed for applications such as lighting, signs, and backlighting.
Constant Current Switching Regulator for LEDs with ON/OFF Function: NCP3066Premier Farnell
This document provides information about the NCP3066 constant current switching regulator for LEDs with ON/OFF function from On Semiconductor. It includes details about the features and applications of the NCP3066, descriptions of its internal block diagram and operation, and test procedures for evaluation boards demonstrating buck, boost, and SEPIC configurations.
(1) The document describes a current mode quadrature oscillator circuit using a current differencing transconductance amplifier (CDTA). (2) The circuit produces two output currents with a 90 degree phase difference between them. (3) The CDTA is a five-terminal active element that consists of an input current differencing stage and dual output transconductance stage.
This document describes the design of a low dropout voltage regulator (LDO) circuit. It includes the goals of providing a 3.3V output voltage from a 5V input. The key components of an LDO - pass transistor, error amplifier, and voltage reference - are discussed. Calculations are shown for efficiency, transistor sizes, setting the bias voltage, and sizing additional transistors. A block diagram and final schematic are presented. Post-layout simulations demonstrate the line regulation as the input voltage is changed.
This document describes the TPS31xx family of ultra-low supply current/voltage supervisory circuits. The circuits provide power on reset and voltage monitoring functions for systems powered from 0.9V to 3.3V. They have precision voltage thresholds as low as 0.9V, supply currents of 1.2uA, and reset outputs that can be open drain or push pull. The devices monitor the supply voltage and provide a reset output if the voltage drops below the threshold. They are available in a small SOT-23 package and are suitable for use in low power applications.
Summary
1. ON Semiconductor has solutions for all low power offline driver topologies: Flyback, Buck-Boost, Buck-Boost, Linear
2. Primary Side Control approach optimized for tight accuracy and wide Vf support for high production yield and reduced development time
3. General shift in market to address non-isolated topologies
This document provides information on the NodeMCU development board. It is an open source firmware and development kit based on the ESP8266 WiFi chip. The board consists of an ESP-12E module, CP2102 for USB to UART connectivity, and a USB connector. It has 8 digital input/output pins and 1 analog input. The board uses the Lua scripting language and the NodeMCU firmware to program the ESP8266 without recompilation. It is a low-cost and compact option for WiFi development.
The SN75176A is a bidirectional transceiver that operates from a single 5V supply. It combines a 3-state differential line driver and differential line receiver. The driver can handle loads up to 60mA and features current limiting and thermal shutdown protection. The receiver has a minimum input impedance of 12kΩ and input sensitivity of ±200mV. It is designed for use on multipoint bus lines in noisy environments.
The STR-X6737 IC is a quasi-resonant switching regulator designed for power supply applications up to 280W. It features a soft switching mode to reduce switching losses and noise, bottom-skip mode to improve efficiency over the load range, and various protection modes. The IC integrates a MOSFET and controller on a TO-3P package for simplified design. It provides lower EMI noise than conventional PWM solutions above 2MHz switching frequency.
The UTC 4051 is an 8-channel analog multiplexer/demultiplexer chip that allows for digitally controlled switching of analog signals. It has three binary control inputs, an inhibit input, and features low on impedance and very low off leakage current. The chip supports analog signal switching across a wide voltage range of 3V to 18V.
The 74HC73 is a dual negative edge triggered JK flip-flop integrated circuit with individual inputs and outputs. It features low power dissipation, ESD protection up to 2000V HBM, multiple package options, and operates from -40°C to +80°C or -40°C to +125°C. The device has J, K, clock and reset inputs that control the complementary Q and not-Q outputs on each flip-flop based on the signal edges.
This document provides specifications for Texas Instruments' μA7800 series of positive voltage regulators. The μA7800 series includes 5 models of 3-terminal positive voltage regulators (μA7805, μA7808, μA7810, μA7812, μA7815) that can provide regulated output voltages of 5V, 8V, 10V, 12V, and 15V respectively, with an output current of up to 1.5A. The document includes details on electrical characteristics, thermal properties, ordering information and package types for each model.
XLSEMI XL140 2A 380KHz 18V Buck DC to DC Converterdegarden
The XL1410 is a 380KHz fixed frequency buck converter capable of supplying 2A loads from 3.6V to 18V input voltages. It requires few external components and has high efficiency, low ripple, and excellent line and load regulation. Key features include adjustable output from 1.222V to 16V, 100% maximum duty cycle, internal MOSFET, and protections such as overcurrent, short circuit, and thermal shutdown. It is available in an 8-pin SOP package.
- A new voltage-mode control scheme for buck converters improves performance at high frequencies by starting the ramp signal earlier, producing minimal jitter even at narrow duty cycles.
- Test results show the new scheme achieves jitter as low as 1.3ns at 1.5MHz switching frequency, compared to over 30ns for traditional control.
- The new scheme also enables monotonic start-up and allows higher bandwidth operation using fewer output capacitors.
This technical brief provides a circuit description and troubleshooting information for a 70155 power supply. It describes the AC input protection, full-wave rectifier/doubler circuit, switcher start-up sequence, 5V voltage regulation circuitry, 24V and negative voltage supplies, calibration procedures, common troubleshooting issues, and typical waveform diagrams. The purpose is to serve as a reference for repair departments to support a product that is beyond its production cycle without manufacturer assistance.
This document provides information on the MJE13003 NPN silicon transistor from Unisonic Technologies Co., Ltd. It describes the transistor as being designed for high-voltage, high-speed power switching in inductive circuits. Key features include a reverse biased safe operating area with inductive loads up to 1.5 amps and a typical fall time of 290ns at 1 amp and 100°C. The transistor has applications in switching regulators, inverters, motor controls, solenoid drivers, and deflection circuits. Electrical characteristics and maximum ratings are provided in tables and graphs.
Designed a microwave amplifier circuit with a required bandwidth of 250MHz at a center frequency of 3.7GHz experiencing 6.5dB gain within Keysight ADS.
The L293 and L293D are integrated circuits that provide bidirectional current of up to 1A and 0.6A respectively to drive devices such as motors and solenoids. They have separate voltage supply inputs for logic and power, with a range of 4.5V to 36V. Each device has four driver channels that are paired and enabled together, with internal diode protection for inductive loads.
The document introduces the LT1965 low noise, low dropout linear regulator. It provides an overview of low dropout regulators and describes the key features of the LT1965, including its wide input voltage range of 1.8V to 20V, adjustable output voltage range of 1.2V to 19.5V, low noise of 40uV RMS, and various protection features. Application examples are provided, including using multiple regulators in parallel for higher output currents. Performance metrics like low dropout voltage and quiescent current are examined. The LT1965 is compared to similar regulators and additional resources for purchasing and support are listed.
This document provides information on the RT7257E, a 3A synchronous step-down DC-DC converter. It can deliver up to 3A of output current from an input supply of 4.5V to 17V and has a fixed switching frequency of 340kHz. The converter uses current mode control and has features such as cycle-by-cycle current limiting, soft-start, and thermal shutdown protection. It is available in an SOP-8 package and is suitable for applications such as wireless routers, LCD monitors, and green electronics.
The PT4115 is a step-down LED driver that operates from 6-30V and provides up to 1.2A of output current. It uses high-side current sensing and has a DIM input that allows for PWM or DC dimming from 5000:1 to 25:1. It is available in SOT89-5 and ESOP8 packages and is designed for applications such as lighting, signs, and backlighting.
The document describes the UCC3895 BiCMOS advanced phase-shift PWM controller. It has features such as programmable output turn-on delay, adaptive delay set, bidirectional oscillator synchronization, and voltage-mode or current-mode control. It can operate at frequencies up to 1 MHz with typical operating current of 5 mA at 500 kHz. The UCC3895 is a phase-shift PWM controller that implements full-bridge power stage control by phase shifting one half-bridge with respect to the other, allowing constant frequency pulse-width modulation with zero-voltage switching for high efficiency at high frequencies. It improves on previous controller families with additional features such as enhanced control logic and adaptive delay set.
The document describes the XL4001 2A 150kHz 40V buck DC/DC converter with constant current loop. It has a wide 4.5V to 40V input voltage range and 1.235V to 37V adjustable output. It provides 2A of constant output current and includes overvoltage, overcurrent, and thermal protection. The fixed 150kHz switching frequency device is simple to use with a minimum number of external components.
This document provides information on the UC3844, UC3845, UC2844, and UC2845 high performance current mode controllers, including:
- Operating temperature ranges and packaging for the devices.
- Pin connections and ordering information for the different package types.
- Electrical characteristics like reference voltage, oscillator frequency, error amplifier performance, current sense input, output specifications, and undervoltage lockout thresholds.
- Graphs depicting properties like oscillator frequency vs timing resistor, output deadtime vs frequency, error amplifier gain and phase vs frequency, and more.
- An overview of key features like current mode operation, adjustable output deadtime, compensation, current limiting, undervoltage lockout,
This document is a datasheet for the TD1410, a 380KHz fixed frequency monolithic step down switch mode regulator with a built in internal Power MOSFET capable of delivering 2A of continuous output current over a wide input voltage range. The datasheet provides details on the device including electrical specifications, typical application circuits, thermal considerations, and function descriptions of the various pins. It is intended to provide engineers with the necessary information to properly utilize the TD1410 in their circuit designs.
This document provides specifications for the A4988 DMOS microstepping motor driver with translator and overcurrent protection. Key specifications include:
- An output on resistance between 320-430 milliohms for sourcing and sinking 1.5A loads.
- A body diode forward voltage drop of up to 1.2V when sourcing or sinking 1.5A.
- Logic supply current of up to 8mA at frequencies below 50kHz, and 5mA when outputs are off.
- Microstep select pins with resistances of 100-150 ohms to select step resolutions.
- Overcurrent protection that triggers at 2.1A or above.
This document provides information on the UTC 4051 8-channel analog multiplexer/demultiplexer IC from Unisonic Technologies. It has 3 binary control inputs and an inhibit input to control 8 independent input/output channels. Key features include a wide operating voltage range of 3V-18V, break-before-make switching to eliminate channel overlap, and low on impedance and off leakage current. It can be used to implement an 8x1 analog multiplexer or 1x8 demultiplexer and is pin compatible with the CD4051.
This document provides specifications for the MAX232 dual driver/receiver IC, which includes a capacitive voltage generator to supply standard TIA/EIA-232 voltage levels from a single 5V supply. It operates up to 120kbps and has ESD protection exceeding 15kV. The MAX232 contains two drivers, two receivers, and a charge pump to convert voltages for serial communication interfaces.
The NCP3170 is a synchronous PWM switching converter that operates from 4.5V to 18V and sources up to 3A of output current. It is capable of producing output voltages as low as 0.8V and incorporates current mode control with many features like soft start, power good detection, and fixed switching frequencies set internally to reduce external components. It is available in an 8-pin SOIC package and is suitable for applications such as set top boxes, DVD/Blu-ray drives, LCD monitors/TVs, and telecom equipment.
Original N-Channel Mosfet 7N65L-TF1-T UTC7N65L 7.4A 650V TO-263 New UTCAUTHELECTRONIC
The 7N65 power MOSFET from Unisonic Technologies is a high-voltage transistor designed for switching applications. It has a maximum voltage rating of 650V, continuous current rating of 7.4A, and features low on-resistance, fast switching times, and high ruggedness. The document provides detailed specifications, characteristics, test methods and typical performance curves for the device.
This document provides product specifications for the IRFZ44N N-channel enhancement mode trench transistor from Philips Semiconductors. The transistor features very low on-state resistance of 22 mOhms and is intended for use in switched mode power supplies and general purpose switching applications. Key specifications include a maximum drain-source voltage of 55V, drain current of 49A, and junction temperature range of -55°C to 175°C. The document provides detailed electrical characteristics, thermal properties, and mechanical dimensions of the device.
The HV9910 is a constant current LED driver IC that operates from 8V to 450V inputs and drives one or more LED strings. It controls an external MOSFET at frequencies up to 300kHz to provide constant current regulation. The output current can be programmed between a few mA to over 1A. It has dimming control via linear current control or low frequency PWM and is suitable for applications such as lighting, displays, and automotive uses.
This document provides information on dual operational amplifiers including the LM358, LM258, LM2904, and LM2904V. It includes maximum ratings, electrical characteristics, representative schematics, circuit descriptions, and example applications such as voltage references, oscillators, filters, and comparators. The amplifiers feature low power, rail-to-rail input/output, and compatibility with popular operational amplifiers.
The TJA1050 is a high-speed CAN transceiver that interfaces between a CAN controller and the physical CAN bus. It provides differential transmit capability to the bus and differential receive capability to the CAN controller. It is fully compatible with the ISO 11898 CAN standard and supports baud rates up to 1 Mbaud. Key features include very low electromagnetic emission, protection against transients, and thermal protection that disables the transmitter if the junction temperature exceeds 165°C. The device is available in an SO8 package and as a bare die.
Original High Performance Off-Line Controller IC ACT30 CT30 30 New Active-SemiAUTHELECTRONIC
The document describes the ACT30, a high performance off-line power supply controller IC. It has features like low standby power of 0.15W, overcurrent protection, and hiccup mode short circuit protection. It uses current mode control and can drive external NPN or MOSFET switches. It is suitable for use in battery chargers, adapters, and other power supplies.
This document provides data sheets for several quad operational amplifier integrated circuits, including the CA124, CA224, CA324, LM324, and LM2902. It summarizes their key specifications such as operating temperature range, voltage gain, bandwidth, input/output voltage ranges, power requirements, and packaging options. The amplifiers each contain four independent high-gain op-amps on a single chip and are designed for use in commercial, industrial and military applications requiring operation from single or dual power supplies.
"IOS 18 CONTROL CENTRE REVAMP STREAMLINED IPHONE SHUTDOWN MADE EASIER"Emmanuel Onwumere
In iOS 18, Apple has introduced a significant revamp to the Control Centre, making it more intuitive and user-friendly. One of the standout features is a quicker and more accessible way to shut down your iPhone. This enhancement aims to streamline the user experience, allowing for faster access to essential functions. Discover how iOS 18's redesigned Control Centre can simplify your daily interactions with your iPhone, bringing convenience right at your fingertips.
Building a Raspberry Pi Robot with Dot NET 8, Blazor and SignalRPeter Gallagher
In this session delivered at NDC Oslo 2024, I talk about how you can control a 3D printed Robot Arm with a Raspberry Pi, .NET 8, Blazor and SignalR.
I also show how you can use a Unity app on an Meta Quest 3 to control the arm VR too.
You can find the GitHub repo and workshop instructions here;
https://bit.ly/dotnetrobotgithub
1. P-TO220-7-11
P-TO263-7-1
P-TO220-7-12
5-V Low-Drop Fixed Voltage Regulator TLE 4271-2
Data Sheet Rev. 2.4 1 2001-04-04
Features
• Output voltage tolerance ≤ ± 2%
• Low-drop voltage
• Integrated overtemperature protection
• Reverse polarity protection
• Input voltage up to 42 V
• Overvoltage protection up to 65 V (≤ 400 ms)
• Short-circuit proof
• Suitable for use in automotive electronics
• Wide temperature range
• Adjustable reset and watchdog time
Functional Description
The TLE 4271-2 is functional and electrical identical to
the TLE 4271.
The device is a 5-V low-drop fixed-voltage regulator.
The maximum input voltage is 42 V (65 V, ≤ 400 ms).
Up to an input voltage of 26 V and for an output current
up to 550 mA it regulates the output voltage within a
Type Ordering Code Package
TLE 4271-2 Q67000-A9446 P-TO220-7-11
TLE 4271-2 S Q67000-A9448 P-TO220-7-12
TLE 4271-2 G Q67006-A9447 P-TO263-7-1
2 % accuracy. The short circuit protection limits the output current of more than 650 mA.
The IC can be switched off via the inhibit input. An integrated watchdog monitors the
connected controller. The device incorporates overvoltage protection and temperature
protection that disables the circuit at overtemperature.
2. TLE 4271-2
Data Sheet Rev. 2.4 2 2001-04-04
Figure 1 Pin Configuration (top view)
Pin Definitions and Functions
Pin Symbol Function
1 I Input; block to ground directly on the IC with ceramic capacitor.
2 INH Inhibit
3 RO Reset Output; the open collector output is connected to the 5 V output
via an integrated resistor of 30 kΩ.
4 GND Ground
5 D Reset Delay; connect a capacitor to ground for delay time adjustment.
6 WI Watchdog Input
7 Q 5-V Output; block to ground with 22 µF capacitor, ESR < 3 Ω.
AEP01939
GND
INH
Ι RO
WI
D Q
1 7
GND
INH
Ι RO
1
WI
AEP02017
D Q
7
AEP01938
INH
RO
GND
1 7
WI
D
Ι Q
P-TO220-7-11 P-TO263-7-1
P-TO220-7-12
3. TLE 4271-2
Data Sheet Rev. 2.4 3 2001-04-04
Circuit Description
The control amplifier compares a reference voltage, which is kept highly accurate by
resistance adjustment, to a voltage that is proportional to the output voltage and drives
the base of a series transistor via a buffer. Saturation control as a function of the load
current prevents any over-saturation of the power element.
The reset output RO is in high-state if the voltage on the delay capacitor CD is greater or
equal VUD. The delay capacitor CD is charged with the current ID for output voltages
greater than the reset threshold VRT. If the output voltage gets lower than VRT (’reset
condition’) a fast discharge of the delay capacitor CD sets in and as soon as VD gets lower
than VLD the reset output RO is set to low-level.
The time for the delay capacitor charge from VUD to VLD is the reset delay time tD.
When the voltage on the delay capacitor has reached VUD and reset was set to high, the
watchdog circuit is enabled and discharges CD with the constant current IDWD. If there is
no rising edge observed at the watchdog input, CD will be discharge down to VLDW, then
reset output RO will be set to low and CD will be charged again with the current IDWC until
VD reaches VUD and reset will be set high again.
If the watchdog pulse (rising edge at watchdog input WI) occurs during the discharge
period CD is charged again and the reset output stays high. After VD has reached VUD,
the periodical behavior starts again.
Internal protection circuits protect the IC against:
• Overload
• Overvoltage
• Overtemperature
• Reverse polarity
4. TLE 4271-2
Data Sheet Rev. 2.4 4 2001-04-04
Figure 2 Block Diagram
Temperature
Sensor
Saturation
Control and
Protection
Circuit
+
-
Reference
Bandgap
Adjustment
Reset
Generator
Watchdog
4
2
1 7
3
5
6
INH GND
WI
AEB01940
Control
Amplifier
Buffer
Ι Q
D
RO
5. TLE 4271-2
Data Sheet Rev. 2.4 5 2001-04-04
Absolute Maximum Ratings
Tj = – 40 to 150 °C
Parameter Symbol Limit Values Unit Notes
min. max.
Input
Voltage
Voltage
Current
VI
VI
II
– 42
–
–
42
65
–
V
V
mA
–
t ≤ 400 ms
internally limited
Inhibit
Voltage
Voltage
Current
VINH
VINH
IINH
– 42
–
–
42
65
–
V
V
mA
–
t ≤ 400 ms
internally limited
Reset Output
Voltage
Current
VRO
IRO
– 0.3
–
42
–
V
mA
–
internally limited
Reset Delay
Voltage
Current
VD
ID
– 0.3
– 5
7
5
V
mA
–
–
Watchdog
Voltage
Current
VW
IW
– 0.3
– 5
7
5
V
mA
–
–
Output
Voltage
Current
VQ
IQ
– 1.0
– 5
16
–
V
mA
–
internally limited
Ground
Current IGND – 0.5 – A –
Temperatures
Junction temperature
Storage temperature
Tj
Tstg
–
– 50
150
150
°C
°C
–
–
6. TLE 4271-2
Data Sheet Rev. 2.4 6 2001-04-04
Operating Range
Parameter Symbol Limit Values Unit Notes
min. max.
Input voltage VI 6 40 V –
Junction temperature Tj – 40 150 °C –
Thermal Resistance
Junction ambient Rthja – 65
70
K/W
K/W
–
P-TO263
Junction case Rthjc
Zthjc
–
–
3
2
K/W
K/W
–
t < 1 ms
7. TLE 4271-2
Data Sheet Rev. 2.4 7 2001-04-04
Characteristics
VI = 13.5 V; – 40 °C ≤ Tj = ≤ 125 °C; VINH > VU,INH (unless otherwise specified)
Parameter Symbol Limit Values Unit Test Condition
min. typ. max.
Output voltage VQ 4.90 5.00 5.10 V 5 mA ≤ IQ ≤ 550 mA;
6 V ≤ VI ≤ 26 V
Output voltage VQ 4.90 5.00 5.10 V 26 V ≤ VI ≤ 36 V;
IQ ≤ 300 mA;
Output current
limiting
IQmax 650 800 – mA VQ = 0 V
Current
consumption
Iq = II
Iq – – 6 µA VINH = 0 V; IQ = 0 mA
Current
consumption
Iq = II
Iq – 800 – µA VINH = 5 V; IQ = 0 mA
Current
consumption
Iq = II – IQ
Iq – 1 1.5 mA IQ = 5 mA
Current
consumption
Iq = II – IQ
Iq – 55 75 mA IQ = 550 mA
Current
consumption
Iq = II – IQ
Iq – 70 90 mA IQ = 550 mA; VI = 5 V
Drop voltage Vdr – 350 700 mV IQ = 550 mA1)
Load regulation ∆VQ – 25 50 mV IQ = 5 to 550 mA;
VI = 6 V
Supply voltage
regulation
∆VQ – 12 25 mV VI = 6 to 26 V
IQ = 5 mA
Power supply
Ripple rejection
PSRR – 54 – dB fr = 100 Hz;
Vr = 0.5 VPP
1)
Drop voltage = VI – VQ (measured when the output voltage has dropped 100 mV from the nominal value
obtained at 13.5 V input)
8. TLE 4271-2
Data Sheet Rev. 2.4 8 2001-04-04
Reset Generator
Switching threshold VRT 4.5 4.65 4.8 V –
Reset high voltage VROH 4.5 – – V –
Saturation voltage VRO,SAT – 60 – mV Rintern = 30 kΩ;
1.0 V ≤ VQ ≤ 4.5 V
Saturation voltage VRO,SAT – 200 400 mV IR = 3 mA1)
;
VQ = 4.4 V
Reset pull-up R 18 30 46 KΩ internally connected
to Q
Lower reset timing
threshold
VLD 0.2 0.45 0.8 V VQ < VRT
Charge current ID 8 14 25 µA VD = 1.0 V
Upper timing
threshold
VUD 1.4 1.8 2.3 V –
Delay time tD 8 13 18 ms CD = 100 nF
Reset reaction time tRR – – 3 µs CD = 100 nF
Overvoltage Protection
Turn-off voltage VI, ov 40 44 46 V –
Inhibit
Turn-on voltage VU,INH 1.0 2.0 3.5 V VQ = high (> 4.5 V)
Turn-off voltage VL,INH 0.8 1.3 3.3 V VQ = low (< 0.8 V)
Inhibit current IINH 8 12 25 µA VINH = 5 V
1)
Test condition not applicable during delay time for power-on reset.
Characteristics (cont’d)
VI = 13.5 V; – 40 °C ≤ Tj = ≤ 125 °C; VINH > VU,INH (unless otherwise specified)
Parameter Symbol Limit Values Unit Test Condition
min. typ. max.
9. TLE 4271-2
Data Sheet Rev. 2.4 9 2001-04-04
Watchdog
Upper watchdog
switching threshold
VUDW 1.4 1.8 2.3 V –
Lower watchdog
switching threshold
VLDW 0.2 0.45 0.8 V –
Discharge current IDWD 1.5 2.7 3.5 µA VD = 1 V
Charge current IDWC 8 14 25 µA VD = 1 V
Watchdog period tWD,P 40 55 80 ms CD = 100 nF
Watchdog trigger
time
tWI,tr 30 45 66 ms CD = 100 nF
see diagram
Watchdog pulse
slew rate
VWI 5 – – V/µs from 20% to 80% VQ
Characteristics (cont’d)
VI = 13.5 V; – 40 °C ≤ Tj = ≤ 125 °C; VINH > VU,INH (unless otherwise specified)
Parameter Symbol Limit Values Unit Test Condition
min. typ. max.
10. TLE 4271-2
Data Sheet Rev. 2.4 10 2001-04-04
Figure 3 Test Circuit
Figure 4 Circuit
3
2
V
VΙ
VINH Ι
C D
Ι
D
5
D
4
WI
GND
V
6
AES01941
RO
V
VQ
470 nF
1000 F
Ι
µ
Ι
Ι
TLE 4271-2
1 7 Q
22 F
RO
µ
Ι
22 F
to MC
Reset 3
4
5
100 nF
AES01942
µ
470 nF
Input
TLE 4271-2
1 7
5 V-Output
6
2
e.g. KL 15
Input
Watchdog
Signal
from MC
11. TLE 4271-2
Data Sheet Rev. 2.4 11 2001-04-04
Application Description
The IC regulates an input voltage in the range of 6 V < VI < 40 V to VQnom = 5.0 V. Up to
26 V it produces a regulated output current of more than 550 mA. Above 26 V the save-
operating-area protection allows operation up to 36 V with a regulated output current of
more than 300 mA. Overvoltage protection limits operation at 42 V. The overvoltage
protection hysteresis restores operation if the input voltage has dropped below 36 V. The
IC can be switched off via the inhibit input, which causes the quiescent current to drop
below 50 µA. A reset signal is generated for an output voltage of VQ < 4.5 V. The
watchdog circuit monitors a connected controller. If there is no positive-going edge at the
watchdog input within a fixed time, the reset output is set to low. The delay for power-on
reset and the maximum permitted watchdog-pulse period can be set externally with a
capacitor.
Design Notes for External Components
An input capacitor CI is necessary for compensation of line influences. The resonant
circuit consisting of lead inductance and input capacitance can be damped by a resistor
of approx. 1 Ω in series with CI. An output capacitor CQ is necessary for the stability of
the regulating circuit. Stability is guaranteed at values of CQ ≥ 22 µF and an ESR of
< 3 Ω.
Reset Circuitry
If the output voltage decreases below 4.5 V, an external capacitor CD on pin D will be
discharged by the reset generator. If the voltage on this capacitor drops below VDRL, a
reset signal is generated on pin RO, i.e. reset output is set low. If the output voltage rises
above the reset threshold, CD will be charged with constant current. After the power-on-
reset time the voltage on the capacitor reaches VDU and the reset output will be set high
again. The value of the power-on-reset time can be set within a wide range depending
of the capacitance of CD.
Reset Timing
The power-on reset delay time is defined by the charging time of an external capacitor
Cd which can be calculated as follows:
tD = CD∗∆V/ID
Definitions: CD = delay capacitor
tD = reset delay time
ID = charge current, typical 14 µA
∆V = VUD, typical 1.8 V
VUD = upper delay timing threshold at CD for reset delay time
12. TLE 4271-2
Data Sheet Rev. 2.4 12 2001-04-04
The reset reaction time trr is the time it takes the voltage regulator to set the reset out
LOW after the output voltage has dropped below the reset threshold. It is typically 1 µs
for delay capacitor of 47 nF. For other values for Cd the reaction time can be estimated
using the following equation:
tRR ≈ 20 s/F × Cd
Figure 5 Time Response
AET01985
t D
t RR
RR
t
<
Power
Reset Shutdown
Thermal Voltage Drop
at Input
Undervoltage
at Output
Secondary
Spike Bounce
Load Shutdown
on
VRO, SAT
LD
V
UD
V
VD, SAT
RT
V
L, INH
V
VU, INH
INH
V
RO
V
VD
Q
V
Ι
V
t
t
t
t
t
=
dt
V
d D
D
C
Ι
13. TLE 4271-2
Data Sheet Rev. 2.4 13 2001-04-04
Watchdog Timing
Figure 6 Time Response, Watchdog Behavior
AES03078
WD, P
t
t WD, L
D
V
VQ
VΙ
VR
WΙ
V
WΙ, tr
t
UDW
V
=
-VLDW
( ) UDW
V -VLDW
( )
ΙDWD ΙDWC
t =
WD, L CD
WΙ, tr
t
WD, P
t
UDW
V
=
-VLDW
( ) ( )
ΙDWC +ΙDWD
Ι .
DWC ΙDWD
CD
C ;
D ;
UDW
V
VLDW
14. TLE 4271-2
Data Sheet Rev. 2.4 14 2001-04-04
Typical Performance Characteristics
Output Voltage VQ versus
Temperature Tj
Output Voltage VQ versus
Input Voltage VI (VINH = VI)
AED01928
-40 0 40 80 120 ˚C 160
4.6
j
T
Q
V
VI = 13.5 V
4.7
4.8
4.9
5.0
5.1
V
5.2
R
6
4
2
0
4
0 2
8
12
10
Q
V
V
10
V
6 8
VΙ
AED01929
= 25
L Ω
15. TLE 4271-2
Data Sheet Rev. 2.4 15 2001-04-04
Output Current Limit IQ versus
Temperature Tj
Current Consumption Iq
versus Output Current IQ
Output Current IQ versus
Input Voltage VI
Current Consumption Iq
versus Output Current IQ
AED01930
-40 0 40 80 120 ˚C 160
0
j
T
200
400
600
800
1000
mA
1200
Q max
I
0
0
AED03076
Ι q
mA
= 13.5 V
mA
Ι
V
20 40 60 80 120
Q
Ι
1
2
3
4
5
6
AED01931
0 10 20 30 40 V 50
0
0.4
0.8
1.2
A
1.0
0.6
0.2
I
V
IQ
= 125 ˚C
Tj
25 ˚C
0
0
AED03077
Ι q
mA
= 13.5 V
mA
Ι
V
100 200 300 400 600
Q
Ι
10
20
30
40
50
60
70
80
16. TLE 4271-2
Data Sheet Rev. 2.4 16 2001-04-04
Current Consumption Iq
versus Input Voltage VI
Inhibit Current IINH
versus Inhibit Voltage VINH
Drop Voltage Vdr versus
Output Current IQ
Output Voltage VQ
versus Inhibit Voltage VINH
AED01934
0 10 20 30 40 V 50
0
40
80
120
mA
100
60
20
I
V
Iq
20 Ω
L
R = 10 Ω
50 Ω
RL =
0
0
1 6
3
2
INH
AED01944
4 V
2
4
6
8
10
12
VΙ = 13.5 V
= 25 C
j
T
INH, high
Ι
Ι INH, on
Ι INH, off
5
INH
V
µA
Ι
400
200
300
100
200
0 400
0
800
600
700
500
Dr
V
mV
mA
600 1000
Ι Q
AED02755
T = 125 C
j
T = 25 C
j
3
3
2
1
0
0
1
2
6
5
4
V
5 V
4 6
VINH
= 25 C
= 13.5 V
Ι
j
V
T
AED01945
Q
V
17. TLE 4271-2
Data Sheet Rev. 2.4 17 2001-04-04
Inhibit Current Consumptions IINH
versus Temperature T
Switching Voltage VUD and VLDW
versus Temperature T
Inhibit Voltages VINH
versus Temperature Tj
-40
0
0 120
80
40
T j
A
14
AED01946
160
Ι INH
µ
2
4
6
8
10
12
Ι INH, high
Ι INH, on
Ι INH, off
UD
40
-40 0
0
V
V
V UDW
, V
VΙ
160
C
80 120
T j
AED01948
= 13.5 V
1.2
0.8
0.4
1.6
2.4
2.0
LDW
V
3
2
1
40
-40 0
0
4
V
6
5
INH
160
C
80 120
AED01947
j
T
V
VINH, on
INH, off
V
18. TLE 4271-2
Data Sheet Rev. 2.4 18 2001-04-04
Charge Current ID, IDWC and Discharge
Current IDWD versus Temperature Tj
Watchdog Pulse Time Tw
versus Temperature Tj
AED01949
-40
0
I
V = 13.5 V
2
4
6
8
10
12
14
16
µA
0 40 80 120 160
˚C
I
Tj
= 1 V
D
V
D
I , IDWC
IDWD
80
40
-40
0
10
30
20
40
0
50
60
70
80
160
120 C
T j
= 13.5 V
AED01950
Ι
CD
V
= 100 nF
ms
W
T
19. TLE 4271-2
Data Sheet Rev. 2.4 19 2001-04-04
Package Outlines
±0.1
1.27
4.4
9.25
±0.2
0.05
2.4
0.5±0.1
±0.3
8.6
10.2
±0.3
±0.4
3.9
±0.4
8.4
3.7
±0.3
A
A
0.25 M
2.8
1)
15.65
±0.3
12.95
0...0.15
1.27
0.6±0.1
C
±0.2
17
±0.3
8.51)
9.9±0.2
7x
-0.15
3.7
10±0.2
6x
C
1.6
±0.3
All metal surfaces tin plated, except area of cut.
Metal surface min. X=7.25, Y=12.3
Typical
1)
0...0.3
P-TO220-7-11
(Plastic Transistor Single Outline Package)
GPT09083
Sorts of Packing
Package outlines for tubes, trays etc. are contained in our
Data Book “Package Information”. Dimensions in mm
20. TLE 4271-2
Data Sheet Rev. 2.4 20 2001-04-04
A
B
A
0.25 M
9.9±0.2
1)
15.65
±0.3
12.95
0...0.15
1.27
0.6±0.1
±0.1
1.27
4.4
B
9.25
±0.2
0.05
C
17
±0.3
8.51)
10±0.2
C
2.4
0.5±0.1
13
±0.5
±0.5
11
7x
0...0.3
6x
All metal surfaces tin plated, except area of cut.
Metal surface min. X=7.25, Y=12.3
1)
Typical
2.4
3.7
-0.15
±0.2
2.8
P-TO220-7-12
(Plastic Transistor Single Outline Package)
GPT09084
Sorts of Packing
Package outlines for tubes, trays etc. are contained in our
Data Book “Package Information”. Dimensions in mm
21. TLE 4271-2
Data Sheet Rev. 2.4 21 2001-04-04
A
8˚ max.
B
A
0.25 M
0.1
Typical
±0.2
10
8.51)
7.55
1)
(15)
±0.2
9.25
±0.3
1
0...0.15
7x0.6±0.1
±0.1
1.27
4.4
B
0.5±0.1
±0.3
2.7
4.7
±0.5
0.05
1)
0.1
Metal surface min. X=7.25, Y=6.9
2.4
1.27
All metal surfaces tin plated, except area of cut.
0...0.3
B
6x
P-TO263-7-1
(Plastic Transistor Single Outline Package)
GPT09114
Sorts of Packing
Package outlines for tubes, trays etc. are contained in
our Data Book “Package Information”.
Dimensions in mm
SMD = Surface Mounted Device