Sept25-07 Rev D

SP7601 29V High Voltage LED Driver

© 2007 Exar Corporation

Page 1

FEATURES

Wide Input Voltage Range 4.5V – 29V

1.2MHz Constant Frequency Operation

Low 0.2V Reference Voltage

Adjustable Overcurrent Protection

PWM Dimming and Power sequencing Control

RoHS Compliant, Lead Free Packaging:

Small 6-Pin TSOT Package

DESCRIPTION

The SP7601 is a high current DC to DC Switching Buck LED Driver that features low component

count and high efficiency due to a very low 0.2V reference voltage. High 1.2MHz switching

frequency allows use of very small external components. The SP7601 is compatible with PWM

dimming up to a frequency of 1kHz at 10% Duty Cycle.

TYPICAL APPLICATION CIRCUIT

Vin

GND

Gate

FB

VDR

SP7601

LX

LED1

Rf b

1

4

5

3

6

2

D1

L1

Rset

M1

C1

0.1uF

Rs

D2

Dimming and

Power sequencing

VIN

up to 29V

GND

LEDn

Cin

Vo / LED +

SP7601

29V High Voltage LED Driver