ZLED7022

Low-Voltage Six-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.

ZLED7022 Overview

The ZLED7022 is a low-noise, constant-frequency charge pump DC/DC converter for driving up to six 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 ZLED7022’s current sinks can operate in parallel for driving higher current

LEDs. Only a few, small external components are needed for typical applications. The ZLED7022’s charge pump operates at a

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