AP8802H Datasheet, PDF (1/11 Pages) Diodes Incorporated – 60V 1A LED Step-down Converter

AP8802H
60V 1A LED Step-down Converter
Description
Pin Assignments
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
resistor connected between the V_IN and SET input pins.
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)
(Top View)
SET 1
GND 2
NC 3
V_IN 4
8
7
AP8802H
6
5
SO-8-EP
Applications
• Commercial & industrial lighting
• Small LCD panel backlight
• Appliances interior lighting
• Architecture Detail lighting
CTRL
GND
SW
SW
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.
AP8802H
Document number: DS32227 Rev. 1 - 2
1 of 11
www.diodes.com
June 2010
© Diodes Incorporated