ZLED7015 Datasheet

© 2016 Integrated Device Technology, Inc.

13

April 20, 2016

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. As the DC

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