APW7136B(2010) データシートの表示（PDF） - Anpec Electronics

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APW7136B
(Rev.:2010)

1MHz, High-Efficiency, Step-Up Converter for 2 to 8 White LEDs

Anpec Electronics 

APW7136A/B/C

Pin Description

PIN

NO.

NAME

1

LX

2

GND

3

FB

4

EN

5

OVP

6

VIN

FUNCTION

Switch pin. Connect this pin to inductor/diode here.

Power and signal ground pin.

Feedback Pin. Reference voltage is 0.25V. Connect this pin to cathode of the lowest LED and

resistor (R1). Calculate resistor value according to R1=0.25V/ILED.

Enable Control Input. Forcing this pin above 1.0V enables the device, or forcing this pin below 0.4V

to shut it down. In shutdown, all functions are disabled to decrease the supply current below 1µA.

Do not leave this pin floating.

Over-Voltage Protection Input Pin. OVP is connected to the output capacitor of the converter.

Main Supply Pin. Must be closely decoupled to GND with a 4.7µF or greater ceramic capacitor.

Block Diagram

VIN

EN

GND

UVLO

OVP

LX

Control Logic

Gate Driver

Over-

Temperature

Protection

Slope

Compensation

Current-

limit

Σ

Current Sense

Amplifier

Oscillator

Soft-

start

Error

ICMP

Amplifier

FB

COMP

EAMP

VREF

0.25V

Copyright © ANPEC Electronics Corp.

8

Rev. A.4 - Dec., 2010

www.anpec.com.tw

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