AP8802H

60V 1A LED Step-down Converter

AP8802H

Document number: DS32227 Rev. 1 - 2

1 of 11

www.diodes.com

June 2010

© Diodes Incorporated

Description

The AP8802H is a step-down DC/DC converter designed to

drive LEDs with a constant current. The device can drive up

to thirteen LEDs, depending on the forward voltage of the

LEDs, in series from a voltage source of 8V to 60V. Series

connection of the LEDs provides identical LED currents

resulting in uniform brightness and eliminating the need for

ballast resistors. The AP8802H switches at frequency up to

500kHz.

This

allows

the

use

of

small

size

external

components, hence minimizing the PCB area needed.

Maximum output current of AP8802H is set via an external

Dimming is achieved by applying either a DC voltage or a

PWM signal at the CTRL input pin. An input voltage of 0.2V

or lower at CTRL shuts down the output at SW and puts the

device into a low-current standby state.

Features

•

LED driving current up to 1A

•

High efficiency up to 92%

•

Operating input voltage up to 60V

•

5% nominal accuracy

•

High switching frequency up to 500kHz

•

PWM/DC input for dimming control

•

Built-in output open-circuit protection

•

SO-8-EP is available in “Green” Molding Compound

(No Br, Sb)

•

Lead Free Finish/ RoHS Compliant (Note 1)

Pin Assignments

1

(Top View)

NC

SET

GND

4

2

3

5

6

7

8

SW

CTRL

SW

GND

AP8802H

SO-8-EP

Applications

•

Commercial & industrial lighting

•

Small LCD panel backlight

•

Appliances interior lighting

•

Architecture Detail lighting

Notes:

1. EU Directive 2002/95/EC (RoHS). All applicable RoHS exemptions applied. Please visit our website at

http://www.diodes.com/products/lead_free.html.