ZLED7020

High Current 40V LED Driver with Internal Switch

Data Sheet

August 12, 2011

© 2011 Zentrum Mikroelektronik Dresden AG — Rev. 1.2

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.

15 of 27

Vin

LX

GND

ZLED7X20

D1

LED

String

Vs = 6 to 40 VDC

C3

Rs

L1

C1

C2

0.1 F

ADJ

3

Application Circuit Design

3.1

Applications

The ZLED7x20 is designed for applications requiring features such as high-speed switching, variable brightness

control, operation with voltages up to 40V, high efficiency, or protection from over-temperature, or open LED

circuit conditions.

Typical applications include MR16/MR11 LED spot lights, LED street lights, parabolic aluminized reflector (PAR)

LED lights, and other general purpose industrial and consumer LED applications.

Figure 3.1, Figure 3.2, Figure 3.3, and Figure 3.4 demonstrate basic application circuits for the four options for

controlling output current described in section 2.

Figure 3.1

Basic ZLED7x20 Application Circuit with Output Current Determined only by Rs