Description

The SC504A is a 2-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), direct 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

  2 Strings, up to 240mA/String

  Current Matching ±%

  Current Accuracy ±2%

PWM Dimming

  Direct PWM Dimming, 000:at KHz

  Input Dimming Frequency 00Hz-30kHz

5-Bits Analog Dimming

I2C Interface

  Fault Status — Open/Short LED, UVLO, OTP

Protection Features

  Open/Shorted LED(s) and adjustable OVP

  Over-Temperature and UVLO Shutdown Protection

4mm X 4mm 20-pin QFN Package

Applications

Ultrabooks^TM ,  All-in-One  PCs,  Monitors,  Automotive Display Backlighting

Backlighting for Mid-Size Displays