ZSLS7025 Datasheet

© 2016 Integrated Device Technology, Inc.

17

April 20, 2016

4

Application Circuit Design

4.1

Applications

The ZSLS7025 is ideal for driving white HB-LEDs in diverse industrial, after-market automotive, and consumer

lighting applications using low supply voltages, such as SELV applications. It is optimal for driving multiple white HB-

LEDs connected in series so that the LED current is uniform for better brightness and color control. It features a wide

input range and high output current.

Figure 4.1 demonstrates the typical application with the external components described in section 4.2. Figure 2.2,

Figure 2.3, and Figure 2.4 demonstrate various dimming applications.

Figure 4.1

Typical ZSLS7025 Application Circuit

TOFF

GATE

ZSLS7025

LED

String

OVP

GND

VDD

ADJ

FB

CS

4.2

External Component Selection

Note: Also see section 4.3 for layout guidelines for the following external components.

4.2.1

4.2.2

average current and a saturation current over the calculated peak current. To calculate the worst case inductor peak

the inductor has a low DCR (copper wire resistance) to minimize the I