GENERAL DESCRIPTION

The ADD5203 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, 2.9 A internal switch and a pin-adjustable operating frequency between 350 kHz and 1 MHz.

FEATURES

White LED driver based on inductive boost converter

Integrated 50 V MOSFET with 2.9 A peak current limit

Input voltage range: 6 V to 21 V

Maximum output adjustable up to 45 V

350 kHz to 1 MHz adjustable operating frequency

Overvoltage protection (OVP) up to typical 47.5 V

Built-in soft start for boost converter

Drives up to eight LED current strings

LED current adjustable up to 30 mA for each channel

Headroom control to maximize efficiency

Adjustable dimming frequency: 200 Hz to 10 kHz

LED open and short fault protection

Selectable dimming control interface methods

PWM input

SMBus serial input

Selectable dimming modes

Fixed delay PWM dimming control with 8-bit resolution

No delay PWM dimming control with 8-bit resolution

Direct PWM dimming control

DC current dimming control with 8-bit resolution

General

Thermal shutdown

Undervoltage lockout

28-lead, 4 mm × 4 mm × 0.75 mm LFCSP_WQ

APPLICATIONS

Notebook PCs, UMPCs, and monitor displays