0.5A LED Driver with up to 75V V_IN and 200mV Feedback Voltage

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93% efficient LED illumination from a 24V DC voltage input at <50% the power of incandescent.

The LM3402/02HV are compact, efficient constant current step-down (Buck) monolithic switching regulators designed to drive high power LEDs.

Ideal for automotive, industrial and general lighting applications, it contains a high side N-MOSFET switch capable of driving up to 500 mA and a low 200mV feedback voltage.

The wide input voltage range of 6V to 42V for the LM3402 and 6V to 75V for the LM3402HV, makes these ideal LED drivers for a wide range of applications.

Hysteretic control with controlled on-time, coupled with an external resistor, allow the converter output voltage to adjust as needed to deliver constant current to a series connected LED string of varying number and type.

Its low feedback voltage reference allows for a decrease in the power dissipation through the sense resistor. Output current dimming via PWM and broken/open LED protection complete the feature set.

 

 

Features Input 6V to 42V (LM3402) and 6V to 75V (LM3402HV) Up to 0.5A drive capability 200mV feedback voltage PWM dimming and low power shutdown MSOP-8 packaging No output capacitor necessary Adjustable constant current Adjustable switching frequency up to 1MHz Thermal shutdown protection 500mA output current over temperature Input UVLO Cycle-by-cycle current limit No control loop compensation required Supports all-ceramic output capacitors and capacitor-less outputs Thermal shutdown protection

Applications Automotive Industrial lighting General illumination LED driver Constant current source

 

 

 Featured Products

Part Number		Description	Data Sheet	App. Notes
LM3402HVMM/NOPB		0.5A Constant Current Buck Regulator for High Power LED Drivers
LM3402MM/NOPB		0.5A Constant Current Buck Regulator for High Power LED Drivers

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