ZLED7012

Low-Voltage Four-Channel LED Driver

Data Sheet

November 9, 2010

© 2010

Zentrum Mikroelektronik Dresden AG — Rev. 1.0

All rights reserved. The material contained herein may not be reproduced, adapted, merged, translated, stored, or used without

the prior written consent of the copyright owner. The information furnished in this publication is subject to changes without notice.

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Figure 1.5

2

Circuit Description

2.1.

Block Diagram

2.2.

ZLED7012 Overview

The ZLED7012 is a low-noise, constant-frequency charge pump DC/DC converter for driving up to four LEDs with constant

current at a level controlled via a PCC serial digital interface, providing a uniform and linear brightness progression. Its 20mA

(maximum) current output per LED channel is optimal for low-voltage or battery-powered applications, such as portable

applications powered by 1-cell lithium batteries. The ZLED7012’s current sinks can operate in parallel for driving higher current

LEDs. Only a few, small external components are needed for typical applications. The ZLED7012’s charge pump operates at a

fixed frequency (1MHz typical) with minimal noise and harmonics.