L3012G-S08-R datasheet(4/5 Pages) UTC

Part #	L3012G-S08-R

Description	1A HIGH POWER LED DRIVER WITH 4.5~40V INPUT

PDF	5 Pages

Scroll/Zoom	100%

Manufacturer	UTC [Unisonic Technologies]

Direct Link	http://www.utc-ic.com

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4 / 5 page

L3012

Preliminary

LINEAR INTEGRATED CIRCUIT

UNISONICTECHNOLOGIESCO.,LTD

4 of 5

www.unisonic.com.tw

QW-R125-025. b



FUNCTION DESCRIPTION

The UTC L3012 is a current mode and fixed frequency (280kHz) LED driver.

1. Output current setting

The output current is determined by the sampling resistor (RS) and setting voltage (VIN-VSENSE a built-in fixed

100mV).

SENSE

OUT





=100mV/Rs

2. Current limiting

UTC L3012 has internal current limiting function, and the voltage on COMP is clamped at about 2V, the output

current of the power MOSFET is limited at about 2A by current comparator.

3. Diode Selection

UTC L3012 driver LED need a Schottky diode. If output current is 700mA or smaller then SS14 (D1N5819) is ok.

The average current through the diode is ID:

ID= (1-D)·ILED

ILED is the current of LED



TYPICAL APPLICATION CIRCUIT

GND

SENSE

VIN

ADJ

VDD

PWM

COMP

SBD

VIN

Cout

10µF

1µF

100nF

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