IS31LT3954A - Lumissil

IS31LT3954A CONSTANT-CURRENT 3-AMPERE PWM DIMMABLE BUCK REGULATOR LED DRIVER

The IS31LT3954A is a DC-to-DC switching converter that integrates an N-channel MOSFET to operate in a buck configuration. The device can operate from a wide input voltage between 4.5V and 38V and provides a constant current of up to 3A for driving a single LED or multiple series connected LEDs. The external resistor, RISET, is used to set a constant LED outp.

Features

 Wide input voltage supply from 4.5V to 38V - Withstand 40V load dump
 True average output current control
 3A maximum output over operating temperature range
 Cycle-by-cycle current limit
 Integrated high-side MOSFET switch
 Dimming via direct logic input or power supply voltage
 Internal control loop compensation
 Under-voltage lockout (UVLO) and thermal shutdown protection
 2μA low power shutdown
 Spread spectrum to optimize EMI
 Robust fault protection and reporting function: - Pin-to-GND short - Component open/short faults - Adjacent pin-to-pin short - LED open/short - Thermal .