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
Ultrabooks^TM,  All-in-One  PCs,  Monitors,  Automotive Display Backlighting
Backlighting for Mid-Size Displays