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LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
LED Drivers for MR16 Lamps
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LED Drivers for MR16 Lamps

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LED Drivers for MR16 Lamps

LED Drivers for MR16 Lamps

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  • 1. LED Drivers for MR16 Lamps NCL30160/NCL30161 1
  • 2. LED Driver DC-DC Decision Tree Wide input Voltage LED Driver Selector Vin < 40V Step-down (Buck) Vout < Vin Step-up (Boost) Vout > Vin SEPIC/Buck-Boost Vout < = > Vin NCP3065/6 <350mA Is Vout > 40V YES Determine Iout? > 1.2A NO < 1.2A NCP3065/6 Boost Controller 2 • Template • Nov-12 2 > 1.3A NCP3065/6 Boost Converter What is the Switch current NCP3163 up to 3A Switch CAT4201 Hysteretic Buck Converter NCP3065/6 Boost Controller Confidential Proprietary NCP3065/6 Buck Converter NCP3065/6 Buck Controller NCL30160 Buck Converter < 1.3A NCL30161 Buck Controller NCL30100 Buck Controller
  • 3. NCL30160 – HB-LED Regulator Value Proposition The NCL30160 is an NFET hysteretic step-down, constant-current driver for high power LEDs. A dedicated PWM input (DIM) enables wide range of pulsed dimming. Switching frequency up to 1.4 MHz, minimizing space and cost. Intended for continuous conduction mode operation, thus no output capacitor is needed Unique Features • 50 mΩ integrated MOSFET • Capable of 100% max duty cycle Benefits Application Data • High efficiency solution • Wide input voltage range capability • Input voltage from 6.3 V to 40 V input Others Features • Up to 1.4 MHz switching frequency • Dedicated PWM dimming pin / low power • No control loop compensation required • 1.5 A average current capability shutdown Market & Applications • • Architectural: MR-16 Area Lighting: Light strips, Landscape, Under-cabinet High Efficiency 50mΩ MOSFET Dedicated DIM Pin Ordering & Package Information • • 3 • Template • Nov-12 3 SOIC-8 NCL30160 Confidential Proprietary
  • 4. NCL30160 Key Features Vcc operation from 6.3-40 V LEDs are connected to Vin 1 A /50 mΩ Integrated MOSFET Dedicated Dimming Input Adjustable current sense threshold Adjustable Initial off-time control 4 • Template • Nov-12 4 Confidential Proprietary
  • 5. Common Vin Multi-string Connection D1 D4 D10 D6 D11 D13 D3 D2 D13 1u 1u L2 NCL 30160 L1 NCL 30160 R2 R3 L3 1u L3 NCL 30160 R3 Reduce the connection lines for the multi-string LEDs 5 • Template • Nov-12 5 Confidential Proprietary D9 D8 D8 1u R1 D10 D9 D15 NCL 30160 D12 D12 D7 D17 D5
  • 6. Functional Description • The NCL30160 uses a hysteretic control of the output current. It aims to keep the peak and valley of the current ripple at a set threshold level. • When the FET is on and the current is rising, the current is continuously sensed through a resistor until it sees the peak current, and then turns off. • When the FET is off and the current is falling, a timer is used for the offtime duration. When the off-time ends, the valley current is sensed, and adjusts the next off-time if needed. 6 • Template • Nov-12 6 Confidential Proprietary
  • 7. Peak Current – Fixed Off Time Operating Principle D1 VIN CIN L1 No Output Cap LED LX VIN DIM/Enable ROT CS NCL30160 RSENSE ROT PWM VCC GND Cvcc •Red Path show current flow when switch is ON •Green Path shows current flow when switch is OFF 7 • Template • Nov-12 7 Confidential Proprietary
  • 8. Off-Time Setting Resistor • Since the current is not sensed while the MOSFET is off, a timer is used to set the FET off-time duration. • The off-time setting resistor sets the initial FET off-time only, when the part starts up. This allows the LED current to quickly reach its expected level. • To pick the value of the off-time setting resistor: – Calculate off-time: – Calculate resistor value: 8 • Template • Nov-12 8 Confidential Proprietary
  • 9. Dimming Performance • Dimming works by pulsewidth modulation (PWM) on the DIM/Enable pin • The duty ratio of the PWM is equivalent to the amount of dimming 9 • Template • Nov-12 9 Confidential Proprietary
  • 10. NCL30160 Schematic • MR-16 12 Vac / up to 1 A application 10 • Template • Nov-12 10 Confidential Proprietary
  • 11. Efficiency Performance 350 mA / 3.5 Vf 11 • Template • Nov-12 11 750 mA / 3.5 Vf Confidential Proprietary
  • 12. Output Current Line Regulation 500 mA / 3 LEDs / 3.5 Vf 12 • Template • Nov-12 12 Confidential Proprietary 500 mA / 68 uH / 3.5 Vf
  • 13. 12 Vac Buck Operation • Recall that in a buck topology, current only flows when Vin is greater than Vout Iout • Since the current isn’t always Vin flowing, you will need to use a smaller Rsense value to reach a desired value average current. • So, NCL30160 voltage varies with 12 Vac input waveform No current flows when Vin < Vout 13 • Template • Nov-12 13 Confidential Proprietary
  • 14. Electronic Ballast Compatibility Table 3 LEDs in series, 2 channels in parallel, 1 A Parameter VIN IIN PIN Power Factor VLED ILED PLED Efficiency Lightech LET-75 120.5 V 72.08 mA 7.746 W 0.892 8.77 V 0.638 A 6.669 W 86.1% Hatch RS12-80M 120.4 V 76.14 mA 8.254 W 0.900 9.14 V 0.685 A 7.157 W 86.7% Lightech LET-60 120.2 V 72.65 mA 7.862 W 0.900 8.84 V 0.647 A 6.779 W 86.2% Eurofase 0084 120.3 V 68.98 mA 7.244 W 0.873 8.70 V 0.606 A 6.342 W 87.6% Hatch RS12-30MLED 120.2 V 83.11 mA 9.491 W 0.950 9.26 V 0.715 A 7.461 W 78.6% Lightech LET-60 120.1 Vac 77.08 mA 8.057 W 0.870 4.69 V 0.942 A 6.703 W 83.2% Eurofase 0084 120.0 Vac 73.81 mA 7.693 W 0.869 4.53 V 0.904 A 6.452 W 83.9% Hatch RS12-30M-LED 120.1 Vac 90.91 mA 9.989 W 0.915 5.45 V 1.07 A 7.618 W 76.3% 2 LEDs in series, 2 channels in parallel, 0.7 A Parameter VIN IIN PIN Power Factor VLED ILED PLED Efficiency 14 • Template • Nov-12 14 Lightech LET-75 120.2 Vac 75.77 mA 7.925 W 0.870 4.58 V 0.927 A 6.589 W 83.1% Hatch RS12-80M 120.1 Vac 78.26 mA 8.414 W 0.895 4.97 V 0.986 A 7.017 W 83.4% Confidential Proprietary
  • 15. NCL30160 Application Schematic • 12 Vdc or 24 Vdc / up to 1 A application 15 • Template • Nov-12 15 Confidential Proprietary
  • 16. Efficiency Performance 300 mA 1A 4 LEDs 4 LEDs 3 LEDs 3 LEDs 2 LEDs 2 LEDs 16 • Template • Nov-12 16 Confidential Proprietary
  • 17. Design Tools / Support • Excel based tool • Eval boards • NCL30160GEVB • Design notes • 24 V LED Light Strip 17 • Template • Nov-12 17 Confidential Proprietary
  • 18. Comparison NCL30160 6.3 - 40V XXXX ZXLD1360 7 - 30 V XXXX PT4115 8 - 30V XXXX LM3404 6 - 42 V NCP3065 3 - 40 V NCL30100 6 - 18 V Input Voltage Continuous Output Current Switch Fsw Sense Method Duty Cycle FB Voltage 1.0 A 1.0 A 1.2 A 1.2 A 1.2 A N/A 50mohm 50 - 1400 kHz Peak 100% max 0.2 V 1000mohm 50 - 500 kHz Average 70% max 1.25 V 600mohm 100 - 1000 kHz Peak ~90% max 1.23 V 750mohm 50 - 1000 kHz Peak ~ 70% max 0.2 V Controller 50 - 500 kHz Peak ~ 85% max 1.2 V Topology Buck Buck Buck Buck 1000mohm (eq) 50 - 250 kHz Average ~ 85% max 0.25 V Buck, Boost, Buck/Boost Package Rja 85 °C/W 125 °C/W 45 °C/W 155 / 50 °C/W 85 C/W 178 C/W Package SO-8 TSOT-23-5 SO-8EP SO-8 / SO-8EP SO-8 / PDIP-8 / DFN-8 TSOP-6 Controller Dedicated Dimming Pin Thermal Protection Control Methodology NO NO NO NO YES YES YES YES YES YES NO NO YES NO YES YES YES NO Hysteretic Hysteretic Hysteretic Hysteretic Hysteretic Hysteretic 18 • Template • Nov-12 18 Confidential Proprietary Buck
  • 19. NCL30161 - Buck Regulator for Driving High Power LEDs Value Proposition The NCL30161 is a hysteretic step−down, constant−current driver for high power LEDs. Ideal for automotive, industrial and general lighting applications utilizing minimal external components. Typical Application diagram & Package info Features • • • • • • • • VIN Range 6.3 V to 40 V Short LED Shutdown Protection No Control Loop Compensation Required Adjustable LED Current Single Pin Brightness and Enable/Disable Control Using PWM Supports All−Ceramic Output Capacitors and Capacitor−less Outputs Thermal Shutdown Protection Capable of 100% Duty Cycle Operation With external mosfet Benefits • Hysteretic control provides good power supply rejection and fast response during load transients • Dedicated PWM input (DIM/EN) enables a wide range of pulsed dimming • Uses smaller external components minimizing space and cost. • Protection features include resistor−programmed constant LED current, shorted LED protection, under−voltage and thermal shutdown. Market & Applications • • • • • LED Driver Constant Current Source Automotive Lighting General Illumination Industrial Lighting 19 • Template • Nov-12 19 Ordering info & Support NCL30161MNT2G Package – 3mm x 3mm DFN10 Confidential Proprietary
  • 20. Smaller Size Solution 1.8 mm*3.8 mm*1 mm 13 mm*mm L1 1 VIN 2 NCL30161 NTLJF4156N 3mm*3mm D2 U1A 10 9 11 7 6 C1 Gate CS VIN NC /DIMM/ENGND NC NC ROT VCC R2 C2 ROT 0 1 2 14 4 5 L1 0 VIN 1 Analog Dimming D2 NCL30160 R3 R2 U1A 5mm*6mm*1.1mm 36.8 mm*mm 10 9 11 7 6 C1 0 Gate CS VIN NC /DIMM/ENGND NC NC ROT VCC ROT 1 2 14 4 5 R2 C2 0 20 • Template • Nov-12 20 Confidential Proprietary 2
  • 21. Increase the input voltage L1 VIN 1 R1 1k D2 Q1 C1 D1 U1A C1 0 10 9 11 7 6 Gate CS VIN NC /DIMM/ENGND NC NC ROT VCC ROT 1 2 14 4 5 R2 C2 0 21 • Template • Nov-12 21 Confidential Proprietary 2
  • 22. Thank you 22 • Template • Nov-12 22 Confidential Proprietary
  • 23. Block Diagram 50mΩ MOSFET 26 • Template • Nov-12 26 Confidential Proprietary

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