ZLED7x20 Datasheet

© 2016 Integrated Device Technology, Inc.

15

April 20, 2016

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 spotlights, 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

Vin

I SENSE

LX

GND

ZLED7X20

D1

LED

String

Vs = 6 to 40 VDC

C3

Rs

L1

C1

C2

0.1µF

ADJ

Figure 3.2

Basic ZLED7x20 Application Circuit with Output Current Controlled by External DC Voltage

Vin

I SENSE

LX

GND

ZLED7X20

D1

Vs = 6 to 40 VDC

C3

Rs

L1

C1

C2

0.1µF

ADJ

+

_

DC

(0.3V to 1.2V)

LED

String