FC1350

350mA LED Lighting Driver

Description

The FC1350 is capable of driving single or multiple

series connected LEDs e ciently from a voltage source

higher than the LED voltage. This step-down converter

provides an externally adjustable output current of up to

350mA from an input supply between 7V and 32V.

can even reach 8 watts of output power, depending on

supply voltage and external components.

The FC1350 consists of an output switch and a

high-side output current sensing circuit that uses an

external resistor to set the nominal average output

current. Through applying an external control signa l to

Features

• Built in thermal and over current shut down.

• Internal 32V Power MOS switch

• 350mA output current

• Single pin on/o and dimming control using

DC voltage or PWM at ADJ pin.

• Internal PWM lter

• Soft-start

• High e ciency (up to 90%)

• Wide input voltage range: 7V to 32V

• 40V transient capability

• Output shutdown

• Up to 1MHz switching frequency

• Inherent open-circuit LED protection

• Typical 5% output current accuracy

Applications

• MR16 and general lighting

• Automotive lighting

• Low voltage industrial lighting

• LED back lighting

• Illuminated signs

the 'ADJ' pin, it can adjust the output current to above

or below the set value. The ADJ pin will accept eit her a

DC voltage or a PWM waveform to provide a

continuous or a gated output current.

The chip contains a PWM lter which provides a

soft-start feature by controlling the rise of input /output

current.

It can raise the soft-start by using an external

capacitor from the ADJ pin to ground. Applying a

voltage of 0.2V or lower to the ADJ pin turns the output

o and switches the device into a low current stan dby

state.

2008. 9. 29

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SEMICONDUCTOR

TECHNICAL DATA

FC1350

Revision No : 0

FC1350