Description

The SC504 is a 4-channel, highly integrated, high-efficiency step-up (boost) HB LED driver designed to reduce

the thickness of mid-size LCD displays. It features a wide input voltage range (4.5V to 27V), phase-shifted PWM

dimming, analog dimming, a flexible output configuration, an I2C interface, and numerous protection features.

Features

Input Voltage — 4.5V to 27V

Output Voltage — Up to 50V

Step-up (Boost) Controller

Ultra-Fast Transient Response (<00μs)

Programmable Switching Frequency

Linear Current Sinks

4 Strings, up to 20mA/String

Current Matching ±

Current Accuracy ±2

PWM Dimming

String-by-String Phase Shifting

Input Dimming Frequency 00Hz-30kHz

User Selectable 9 or 0-Bits Dimming Resolution

5-Bits Analog Dimming

I2C Interface

Fault Status — Open/Short LED, UVLO, OTP

Device Control: PLL Setting

Protection Features

Open/Shorted LED(s) and adjustable OVP

Over-Temperature and UVLO Shutdown Protection

4mm X 4mm 20-pin QFN Package

Applications

UltrabooksTM, All-in-One PCs, Monitors, Automotive Display Backlighting

Backlighting for Mid-Size Displays