Vip Er22a

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Vip Er22a

  1. 1. VIPer22ADIP ® VIPer22AS LOW POWER OFF LINE SMPS PRIMARY SWITCHER TYPICAL POWER CAPABILITY Mains type SO-8 DIP-8 European 12 W 20 W (195 - 265 Vac) US / Wide range SO-8 DIP-8 7W 12 W (85 - 265 Vac) ORDER CODES PACKAGE TUBE T&R n FIXED 60 KHZ SWITCHING FREQUENCY SO-8 VIPer22AS VIPer22AS13TR n 9V TO 38V WIDE RANGE VDD VOLTAGE DIP-8 VIPer22ADIP - n CURRENT MODE CONTROL n AUXILIARY UNDERVOLTAGE LOCKOUT MOSFET on the same silicon chip. Typical WITH HYSTERESIS applications cover off line power supplies for n HIGH VOLTAGE START UP CURRENT battery charger adapters, standby power supplies for TV or monitors, auxiliary supplies for motor SOURCE control, etc. The internal control circuit offers the n OVERTEMPERATURE, OVERCURRENT AND following benefits: OVERVOLTAGE PROTECTION WITH – Large input voltage range on the VDD pin AUTORESTART accommodates changes in auxiliary supply voltage. This feature is well adapted to battery DESCRIPTION charger adapter configurations. The VIPer22A combines a dedicated current mode – Automatic burst mode in low load condition. PWM controller with a high voltage Power – Overvoltage protection in hiccup mode. BLOCK DIAGRAM DRAIN ON/OFF 60kHz REGULATOR OSCILLATOR INTERNAL PWM S LATCH SUPPLY OVERTEMP. R1 FF Q DETECTOR R2 R3 R4 VDD _ + BLANKING 8/14.5V _ 0.23 V + OVERVOLTAGE LATCH 230 Ω R + S FF Q 42V _ 1 kΩ FB SOURCE September 2002 1/15
  2. 2. VIPer22ADIP / VIPer22AS PIN FUNCTION Name Function Power supply of the control circuits. Also provides a charging current during start up thanks to a high voltage current source connected to the drain. For this purpose, an hysteresis comparator monitors the VDD voltage and provides two thresholds: VDD - VDDon: Voltage value (typically 14.5V) at which the device starts switching and turns off the start up current source. - VDDoff: Voltage value (typically 8V) at which the device stops switching and turns on the start up current source. SOURCE Power MOSFET source and circuit ground reference. Power MOSFET drain. Also used by the internal high voltage current source during start up phase for DRAIN charging the external VDD capacitor. Feedback input. The useful voltage range extends from 0V to 1V, and defines the peak drain MOSFET FB current. The current limitation, which corresponds to the maximum drain current, is obtained for a FB pin shorted to the SOURCE pin. CURRENT AND VOLTAGE CONVENTIONS I DD ID VDD DRAIN I FB FB CONTROL VDD VD SOURCE VFB VIPer22A CONNECTION DIAGRAM SOURCE 1 8 DRAIN SOURCE 1 8 DRAIN SOURCE 2 7 DRAIN SOURCE 2 7 DRAIN FB 3 6 DRAIN FB 3 6 DRAIN VDD 4 5 DRAIN VDD 4 5 DRAIN SO-8 DIP8 2/15
  3. 3. VIPer22ADIP / VIPer22AS ABSOLUTE MAXIMUM RATINGS Symbol Parameter Value Unit VDS(sw) Switching Drain Source Voltage (Tj=25 ... 125°C) (See note 1) -0.3 ... 730 V VDS(st) Start Up Drain Source Voltage (Tj=25 ... 125°C) (See note 2) -0.3 ... 400 V ID Continuous Drain Current Internally limited A VDD Supply Voltage 0 ... 50 V IFB Feedback Current 3 mA Electrostatic Discharge: VESD Machine Model (R=0Ω; C=200pF) 200 V Charged Device Model 1.5 kV Tj Junction Operating Temperature Internally limited °C Tc Case Operating Temperature -40 to 150 °C Tstg Storage Temperature -55 to 150 °C Note: 1. This parameter applies when the start up current source is off. This is the case when the VDD voltage has reached VDDon and remains above VDDoff. 2. This parameter applies when the start up current source is on. This is the case when the VDD voltage has not yet reached VDDon or has fallen below V DDoff. THERMAL DATA Symbol Parameter Max Value Unit Thermal Resistance Junction-Pins for : Rthj-case SO-8 25 °C/W DIP-8 15 Thermal Resistance Junction-Ambient for : Rthj-amb SO-8 (See note 1) 55 °C/W DIP-8 (See note 1) 45 Note: 1. When mounted on a standard single-sided FR4 board with 200 mm² of Cu (at least 35 µm thick) connected to all DRAIN pins. ELECTRICAL CHARACTERISTICS (Tj=25°C, VDD=18V, unless otherwise specified) POWER SECTION Symbol Parameter Test Conditions Min. Typ. Max. Unit BVDSS Drain-Source Voltage ID=1mA; VFB=2V 730 V IDSS Off State Drain Current VDS=500V; VFB=2V; Tj=125°C 0.1 mA Static Drain-Source ID=0.4A 15 17 RDSon Ω On State Resistance ID=0.4A; Tj=100°C 31 ID=0.2A; VIN=300V (See fig.1) tf Fall Time 100 ns (See note 1) ID=0.4A; VIN=300V (See fig.1) tr Rise Time 50 ns (See note 1) Coss Drain Capacitance VDS=25V 40 pF Note: 1. On clamped inductive load 3/15
  4. 4. VIPer22ADIP / VIPer22AS ELECTRICAL CHARACTERISTICS (Tj=25°C, VDD=18V, unless otherwise specified) SUPPLY SECTION Symbol Parameter Test Conditions Min. Typ. Max. Unit IDDch Start Up Charging VDS=100V; VDD=0V ...VDDon (See fig. 2) -1 mA Current Start Up Charging VDD=5V; VDS=100V IDDoff Current 0 mA Tj > TSD - THYST in Thermal Shutdown IDD0 Operating Supply Current I =2mA FB 3 5 mA Not Switching IDD1 Operating Supply Current I =0.5mA; I =50mA (Note 1) FB D 4.5 mA Switching DRST Restart Duty Cycle (See fig. 3) 16 % VDD Undervoltage VDDoff (See fig. 2 & 3) 7 8 9 V Shutdown Threshold VDDon VDD Start Up Threshold (See fig. 2 & 3) 13 14.5 16 V VDD Threshold VDDhyst (See fig. 2) 5.8 6.5 7.2 V Hysteresis VDD Overvoltage VDDovp 38 42 46 V Threshold Note: 1. These test conditions obtained with a resistive load are leading to the maximum conduction time of the device. OSCILLATOR SECTION Symbol Parameter Test Conditions Min. Typ. Max. Unit FOSC Oscillator Frequency VDD=VDDoff ... 35V; Tj=0 ... 100°C 54 60 66 kHz Total Variation PWM COMPARATOR SECTION Symbol Parameter Test Conditions Min. Typ. Max. Unit GID IFB to ID Current Gain (See fig. 4) 560 IDlim Peak Current Limitation VFB=0V (See fig. 4) 0.56 0.7 0.84 A IFBsd IFB Shutdown Current (See fig. 4) 0.9 mA RFB FB Pin Input Impedance ID=0mA (See fig. 4) 1.2 kΩ td Current Sense Delay to ID=0.4A 200 ns Turn-Off tb Blanking Time 500 ns tONmin Minimum Turn On Time 700 ns OVERTEMPERATURE SECTION Symbol Parameter Test Conditions Min. Typ. Max. Unit TSD Thermal Shutdown (See fig. 5) 140 170 °C Temperature THYST Thermal Shutdown (See fig. 5) 40 °C Hysteresis 4/15
  5. 5. VIPer22ADIP / VIPer22AS Figure 1 : Rise and Fall Time ID C L D C << Coss t VDS VDD DRAIN FB CONTROL 300V 90% SOURCE tfv trv VIPer22A 10% t Figure 2 : Start Up VDD Current IDD IDD0 VDDhyst VDD VDDoff VDDon IDDch VDS = 100 V Fsw = 0 kHz Figure 3 : Restart Duty Cycle VDD VDDon VDD DRAIN VDDoff 10µF FB CONTROL 100V tCH tST SOURCE t 2V VIPer22A tST D RST = ------------------------- t ST + tCH 5/15
  6. 6. VIPer22ADIP / VIPer22AS Figure 4 : Peak Drain Current vs. Feedback Current 100V ID 4mH IDpeak 1/FOSC VDD DRAIN FB t 18V CONTROL 100V SOURCE IFB 47nF VIPer22A VFB FBsd ⋅ FB I R The drain current limitation is obtained for VFB = 0 V, and a negative current is drawn from the FB pin. See the Application IFB section for further details. IDpeak ∆I Dpea k IDlim GID = – ---------------------- - ∆I FB IFB 0 IFBsd Figure 5 : Thermal Shutdown Tj TSD THYST t VDD VDDon Automatic start up t 6/15
  7. 7. VIPer22ADIP / VIPer22AS Figure 6 : Switching Frequency vs Temperature 1.01 Vdd = 10V ... 35V 1 Normalized Frequency 0.99 0.98 0.97 -20 0 20 40 60 80 100 120 Temperature (°C) Figure 7 : Current Limitation vs Temperature 1.04 1.03 Normalized Current Limitation 1.02 1.01 1 0.99 0.98 Vin = 100V 0.97 Vdd = 20V 0.96 0.95 0.94 -20 0 20 40 60 80 100 120 Temperature (°C) 7/15
  8. 8. VIPer22ADIP / VIPer22AS Figure 8 : Rectangular U-I output characteristics for battery charger DCOUT R1 T1 C1 C2 D2 D1 D3 T2 F1 AC IN C3 D4 ISO1 + U1 C4 VDD DRAIN - FB C5 CONTROL C6 SOURCE VIPerX2A C7 R2 D5 U2 R3 Vcc R4 Vref R5 R6 C8 C9 - + C10 + - GND R7 R8 R9 TSM101 R10 GND RECTANGULAR U-I OUTPUT WIDE RANGE OF VDD VOLTAGE CHARACTERISTIC The VDD pin voltage range extends from 9V to 38V. A complete regulation scheme can achieve This feature offers a great flexibility in design to combined and accurate output characteristics. achieve various behaviors. In figure 8 a forward Figure 8 presents a secondary feedback through configuration has been chosen to supply the an optocoupler driven by a TSM101. This device device with two benefits: offers two operational amplifiers and a voltage – as soon as the device starts switching, it reference, thus allowing the regulation of both immediately receives some energy from the output voltage and current. An integrated OR auxiliary winding. C5 can be therefore reduced function performs the combination of the two and a small ceramic chip (100 nF) is sufficient to resulting error signals, leading to a dual voltage insure the filtering function. The total start up and current limitation, known as a rectangular time from the switch on of input voltage to output output characteristic. voltage presence is dramatically decreased. This type of power supply is especially useful for – the output current characteristic can be battery chargers where the output is mainly used in maintained even with very low or zero output current mode, in order to deliver a defined charging voltage. Since the TSM101 is also supplied in rate. The accurate voltage regulation is also forward mode, it keeps the current regulation up convenient for Li-ion batteries which require both whatever the output voltage is.The VDD pin modes of operation. voltage may vary as much as the input voltage, that is to say with a ratio of about 4 for a wide range application. 8/15
  9. 9. VIPer22ADIP / VIPer22AS FEEDBACK PIN PRINCIPLE OF OPERATION In a real application, the FB pin is driven with an A feedback pin controls the operation of the optocoupler as shown on figure 9 which acts as a device. Unlike conventional PWM control circuits pull up. So, it is not possible to really short this pin which use a voltage input (the inverted input of an to ground and the above drain current value is not operational amplifier), the FB pin is sensitive to achievable. Nevertheless, the capacitor C is current. Figure 9 presents the internal current averaging the voltage on the FB pin, and when the mode structure. optocoupler is off (start up or short circuit), it can be assumed that the corresponding voltage is very The Power MOSFET delivers a sense current Is close to 0 V. which is proportional to the main current Id. R2 receives this current and the current coming from For low drain currents, the formula (1) is valid as the FB pin. The voltage across R2 is then long as IFB satisfies IFB< IFBsd, where IFBsd is an compared to a fixed reference voltage of about internal threshold of the VIPer22A. If IFB exceeds 0.23 V. The MOSFET is switched off when the this threshold the device will stop switching. This is following equation is reached: represented on figure 4, and IFBsd value is R 2 ⋅ ( IS + IFB ) = 0.23V specified in the PWM COMPARATOR SECTION. Actually, as soon as the drain current is about 12% By extracting IS: of Idlim, that is to say 85 mA, the device will enter 0.23V a burst mode operation by missing switching I S = ------------- – I FB - cycles. This is especially important when the R2 converter is lightly loaded. Using the current sense ratio of the MOSFET GID : It is then possible to build the total DC transfer I D = G ID ⋅ IS = G ID ⋅  ------------- – IFB 0.23V function between ID and IFB as shown on figure 10. -  R2  This figure also takes into account the internal The current limitation is obtained with the FB pin blanking time and its associated minimum turn on shorted to ground (VFB = 0 V). This leads to a time. This imposes a minimum drain current under negative current sourced by this pin, and which the device is no more able to control it in a expressed by: linear way. This drain current depends on the primary inductance value of the transformer and 0.23V the input voltage. Two cases may occur, IFB = – ------------- - R1 depending on the value of this current versus the By reporting this expression in the previous one, it fixed 85 mA value, as described above. is possible to obtain the drain current limitation START UP SEQUENCE IDlim: This device includes a high voltage start up current IDlim = G ID ⋅ 0.23V ⋅  ----- + -----  1 1 - - source connected on the drain of the device. As  R 2 R 1 soon as a voltage is applied on the input of the converter, this start up current source is activated Figure 9 : Internal Current Control Structure as long as VDD is lower than VDDon. When reaching VDDon, the start up current source is DRAIN switched off and the device begins to operate by 60kHz Id turning on and off its main power MOSFET. As the OSCILLATOR FB pin does not receive any current from the optocoupler, the device operates at full current +Vdd S PWM Q capacity and the output voltage rises until reaching LATCH R Figure 10 : IFB Transfer function Secondary feedback IDpeak 0.23V Is IFB IDlim 1 kΩ FB R1 C 230 Ω R2 Part masked by the 1 IFBsd threshold t ⋅V ONmin IN SOURCE -------------------------------------- - L 85mA 2 t ⋅V ONmin IN -------------------------------------- - IFB L 0 IFBsd 9/15
  10. 10. VIPer22ADIP / VIPer22AS Figure 11 : Start Up Sequence Figure 12 : Overvoltage Sequence VDD VDD VDDon VDDovp VDDoff VDDon tss VDDoff t t IFB VDS t t VOUT OVERVOLTAGE THRESHOLD An overvoltage detector on the VDD pin allows the VIPer22A to reset itself when VDD exceeds VDDovp. This is illustrated in figure 12, which shows the whole sequence of an overvoltage event. Note t that this event is only latched for the time needed by VDD to reach VDDoff, and then the device resumes normal operation automatically. the regulation point where the secondary loop begins to send a current in the optocoupler. At this point, the converter enters a regulated operation where the FB pin receives the amount of current needed to deliver the right power on secondary side. This sequence is shown in figure 11. Note that during the real starting phase tss, the device consumes some energy from the VDD capacitor, waiting for the auxiliary winding to provide a continuous supply. If the value of this capacitor is too low, the start up phase is terminated before receiving any energy from the auxiliary winding and the converter never starts up. This is illustrated also in the same figure in dashed lines. 10/15
  11. 11. VIPer22ADIP / VIPer22AS SO-8 MECHANICAL DATA mm. inch DIM. MIN. TYP MAX. MIN. TYP. MAX. A 1.75 0.068 a1 0.1 0.25 0.003 0.009 a2 1.65 0.064 a3 0.65 0.85 0.025 0.033 b 0.35 0.48 0.013 0.018 b1 0.19 0.25 0.007 0.010 C 0.25 0.5 0.010 0.019 c1 45 (typ.) D 4.8 5 0.188 0.196 E 5.8 6.2 0.228 0.244 e 1.27 0.050 e3 3.81 0.150 F 3.8 4 0.14 0.157 L 0.4 1.27 0.015 0.050 M 0.6 0.023 S 8 (max.) L1 0.8 1.2 0.031 0.047 11/15 1
  12. 12. VIPer22ADIP / VIPer22AS Plastic DIP-8 MECHANICAL DATA mm. DIM. MIN. TYP MAX. A 5.33 A1 0.38 A2 2.92 3.30 4.95 b 0.36 0.46 0.56 b2 1.14 1.52 1.78 c 0.20 0.25 0.36 D 9.02 9.27 10.16 E 7.62 7.87 8.26 E1 6.10 6.35 7.11 e 2.54 eA 7.62 eB 10.92 L 2.92 3.30 3.81 Package Weight Gr. 470 P001 12/15
  13. 13. VIPer22ADIP / VIPer22AS SO-8 TUBE SHIPMENT (no suffix) B C Base Q.ty 100 Bulk Q.ty 2000 Tube length (± 0.5) 532 A A 3.2 B 6 C (± 0.1) 0.6 All dimensions are in mm. TAPE AND REEL SHIPMENT (suffix “13TR”) REEL DIMENSIONS Base Q.ty 2500 Bulk Q.ty 2500 A (max) 330 B (min) 1.5 C (± 0.2) 13 F 20.2 G (+ 2 / -0) 12.4 N (min) 60 T (max) 18.4 All dimensions are in mm. TAPE DIMENSIONS According to Electronic Industries Association (EIA) Standard 481 rev. A, Feb 1986 Tape width W 12 Tape Hole Spacing P0 (± 0.1) 4 Component Spacing P 8 Hole Diameter D (± 0.1/-0) 1.5 Hole Diameter D1 (min) 1.5 Hole Position F (± 0.05) 5.5 Compartment Depth K (max) 4.5 Hole Spacing P1 (± 0.1) 2 All dimensions are in mm. End Start Top No components Components No components cover tape 500mm min Empty components pockets 500mm min saled with cover tape. User direction of feed 13/15 1
  14. 14. VIPer22ADIP / VIPer22AS DIP-8 TUBE SHIPMENT (no suffix) A C Base Q.ty 20 Bulk Q.ty 1000 Tube length (± 0.5) 532 A 8.4 B B 11.2 C (± 0.1) 0.8 All dimensions are in mm. 14/15 1
  15. 15. VIPer22ADIP / VIPer22AS Information furnished is believed to be accurate and reliable. However, STMicroelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may results from its use. No license is granted by implication or otherwise under any patent or patent rights of STMicroelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. STMicroelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of STMicroelectronics. The ST logo is a trademark of STMicroelectronics © 2002 STMicroelectronics - Printed in ITALY- All Rights Reserved. STMicroelectronics GROUP OF COMPANIES Australia - Brazil - Canada - China - Finland - France - Germany - Hong Kong - India - Israel - Italy - Japan - Malaysia - Malta - Morocco - Singapore - Spain - Sweden - Switzerland - United Kingdom - U.S.A. http://www.st.com 15/15

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