Datasheet > L3012

L3012

更新时间： 2024-02-26 16:46:53

品牌	Logo	应用领域
友顺 - UTC		高功率电源驱动输入元件
页数	文件大小	规格书
5页	173K
描述
1A HIGH POWER LED DRIVER WITH 4.5~40V INPUT

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中文翻译

获取价格

数据手册

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L3012 数据手册

L3012

Preliminary

LINEAR INTEGRATED CIRCUIT



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 (R_S) and setting voltage (V_IN-V_SENSEa built-in fixed

100mV).

V_IN V_SENSE

I_OUT



=100mV/Rs

R_S

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 I_D:

I_D= (1-D)·I_LED

I_LEDis the current of LED



TYPICAL APPLICATION CIRCUIT

ADJ

V_DD

GND

SBD

Cout

SENSE

PWM

V_IN

COMP

1µF

100nF

10µF

UNISONIC TECHNOLOGIES CO., LTD

4 of 5

QW-R125-025. b

www.unisonic.com.tw

1 2 345

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