The LM3414HVMR/NOPB（购买请点击）are 1A 60W* common anodecapable constant current buck LED drivers. They are exceptionallysuitable to drive single string of 3W HBLED with up to96% efficiency. They accept input voltages from 4.5VDC to65VDC and deliver up to 1A average LED current with ±3%accuracy. The integrated low-side N-channel power MOSFETand current sensing element realize simple and low componentcount circuitry as no bootstrapping capacitor and externalcurrent sensing resistor are required. An external smallsignalresistor to ground provides very fine LEDLM3414HVMR/NOPB（购买请点击） currentadjustment, analog dimming as well as thermal fold-backunctions.
Constant switching frequency operation eases EMI. No externalloop compensation network is neededLM3414HVMR/NOPB（购买请点击）. The proprietaryPulse-Level-Modulation (PLM) control method benefits inhigh conversion efficiency and true average LED current regulation.Fast response time realizes fine LED current pulsefulfilling the 240 Hz 256-step dimming resolution requirementfor general lighting.The LM3414 and LM3414HV are available in ePSOP-8 and3mm x 3mm LLP-8 packages.
Features
Support LED power up to 60W*: 18x 3W HBLEDs;
Requires NO external current sensing resistor;
±3% LED current accuracyLM3414HVMR/NOPB（购买请点击）;
Up to 96% efficiency;
High contrast ratio (Minimum dimming current pulse width<10 μS)LM3414HVMR/NOPB（购买请点击）;
Integrated low-side N-channel MOSFET;
Adjustable Constant LED current from 350mA to 1000mA;
Support analog dimming and thermal fold-back;
Wide input voltage range:
4.5V to 42V (LM3414);
4.5V to 65V (LM3414HV);
Constant Switching Frequency adjustable from 250 kHz to1000 kHz;
Thermal shutdown protection;
Power enhanced ePSOP-8 or 3mm x 3mm LLP-8 package。
版权所有