ISSI IS31LT3954

Description

The IS31LT3954_IS32LT3954 is a DC-to-DC switchingconverter, which integrate an N-channel MOSFET to operate in a buck configuration. The device supply 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, RSET, is used to adjust LED output current, which allowing the output voltage to be automatically adjusted for a variety of LED configurations.

Features

• Wide input voltage supply from 4.5V to 38V
• Withstand 40V load dump
• ±5% 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
• AEC-Q100 qualification
• IS32LT3954 only

Typical applications

• General high brightness LED lighting, Architecture lighting, Dimmable lights, Pool lighting

More information

• Datasheet
• IC product information