ZLED7015

1.0MHz Boost Converter with Internal 35V Switch

Data Sheet

December 20, 2011

© 2011 Zentrum Mikroelektronik Dresden AG

— Rev. 1.00

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.

13 of 22

EN

LX

ZLED7015

LED

String

FB

PGND

AGND

OVP

VP

VDD

EN

LX

ZLED7015

LED

String

FB

PGND

AGND

OVP

VP

VDD

Figure 2.1

Typical Application Circuit

2.2.2

Dimming via External DC Voltage Control

The LED output current can be set below the nominal average value defined on section 2.2.1 by using an

external DC voltage control signal superimposed on the FB pin as shown in the example circuit in Figure 2.2.

voltage at the FB pin. This causes the ZLED7015 to compensate by reducing the output current through the

LED string. Consequently, the output current is inversely proportional to the DC control voltage.

dimming applications.

Figure 2.2

Example Circuit for Controlling Output Current via an External DC Control Voltage