LM3404MRX/NOPB

1.0A恒流降压稳压器用于驱动高功率LED 1.0A Constant Current Buck Regulator for Driving High Power LEDs

The from Texas Instruments is a 1A constant current buck regulator for driving high power LEDs in 8 pin SO PowerPAD package. This monolithic switching regulator is designed to deliver constant currents to high power LEDs. This device contains a high side N-channel MOSFET switch with a current limit of 1.5A typical for step-down buck regulators. The LM3404HV device is a buck regulator with a wide input voltage range, low voltage reference and a fast output enable and disable function. Hysteretic controlled on-time and an external resistor allow the converter output voltage to adjust as needed to deliver a constant current to series and series-parallel connected LED arrays of varying number and type. Some features are: LED dimming using pulse width modulation PWM, broken or open LED protection, low-power shutdown and thermal shutdown.

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VIN range from 6V to 42V

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1.2A output current overtemperature

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Cycle by cycle current limit, thermal shutdown protection

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No control loop compensation required

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Separate PWM dimming and low power shutdown

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Supports all ceramic output capacitors and capacitor-less outputs

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IIN operating current is 625µA non-switching, CS=0.5V, IIN shutdown current is 95µA RON / SD=0V

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Operating temperature range from -40°C to 125°C