GENERAL DESCRIPTION

The ADD5207 is a white LED driver for backlight applications based on high efficiency, current mode, step-up converter technology. It is designed with a 0.15 Ω, 1.5 A internal switch and a pin-adjustable operating frequency between 600 kHz and 1 MHz.

FEATURES

White LED driver based on inductive boost converter

Integrated 40 V MOSFET with 1.5 A peak current limit

Input voltage range: 6 V to 21 V

Maximum output adjustable up to 36 V

600 kHz to 1 MHz adjustable operating frequency

Typical 39 V fixed overvoltage protection (OVP)

Built-in soft start for boost converter

Drives up to 4 LED current strings

LED current adjustable up to 25 mA for each channel

Headroom control to maximize efficiency

Fixed LED dimming frequency: 8 kHz

LED open fault protection

Brightness control with PWM input

Dimming controls

4-channel operation: 90 degree phase shift between

channels

3-channel operation: 120 degree phase shift between

channels

General

Thermal shutdown

Undervoltage lockout

14-lead, 4 mm × 3 mm LFCSP

APPLICATIONS

Notebook PCs, UMPCs, and monitor displays