SC5012 SC5012Q High Efficiency 4-Ch, 150mA/Ch LED Driver with I2C Interface and Phase-Shifted PWM Dimming POWER MANAGEMENT Features Description Input Voltage — 4.5V to 45V Output Voltage — Up to 65V Step-up (Boost) Controller Ultra-Fast Transient Response Programmable Switching Frequency External Sync Frequency for Boost Controller Linear Current Sinks 4 Strings, up to 150mA/String Current Matching ±1% Current Accuracy ±2% PWM Dimming 5000:1 dimming ratio String-by-String Phase Shifting Dimming Frequency 100Hz-30kHz User Selectable 9 or 10 Bits Dimming Resolution Optional Synchronization to VSYNC Signal External Frequency Synchronization, FSYNC 8-bit Analog Dimming I2C Interface Fault Status — Open/Short LED, OTP Device Control: SYNC Freq, PLL Setting Protection Features Open/Shorted LED(s) and adjustable OVP Over-Temperature 4mm X 4mm 24 Ld QFN Package AEC-Q100 (Grade2) Qualified Version Available The SC5012/Q is a 4-channel high-precision, high-efficiency step-up (Boost) HB LED driver designed for backlight applications. It features wide input voltage range (4.5V to 45V) , flexible output configuration, wide analog and PWM dimming range, phase shifting, optional fading, external boost controller frequency synchronization (FSYNC), I2C interface, and numerous protection features. The boost controller, with programmable switching frequency from 200kHz to 2.2MHz, can maximize efficiency by dynamically minimizing the output voltage while maintaining LED string current accuracy. It provides excellent line and load response with no external compensation components. Each linear current sink is matched within ±1% for superb lighting uniformity, and the accuracy of each string current is ±2%. An external resistor adjusts the current from 40-150mA per string. It also features PWM dimming resolution of 9 or 10 bits (user selectable) over a dimming frequency from 100Hz to 20kHz, synchronized to the SYNC signal or the boost oscillator. String-by-string phase shifting reduces the demand on the input/output capacitance, decreases EMI, and improves dimming linearity. SC5012/Q is available in 4mm X 4mm 24 Ld QFN package. Applications The SC5012Q is an AEC-Q100 (Grade2) qualified version. Medium-sized LCD Panel Automotive Car Navigation/Information Display LCD Monitors Typical Application Circuit VIN 4.5 to 45V L1 R4 C1 SCP R5 EN VIN R24 R9 CS SC5012Q VLDO R15 ISET SC5012 R7 FLT FLT FSET C4 C20 VCC R6 R8 C21 VLDO DRVN Q1 VOUT up to 65V C22 SS CPLL R11 FSYNC FSYNC I2C SDA I2C SCL OVP R10 IO1 SYNC PWMI SYNC PWMI AGND PGND Revision 2.9 IO2 IO3 Up to 150mA/CH C6 IO4 © 2014 Semtech Corporation 1