SC5010H High Efficiency 8-Channel LED Driver with I2C Interface and Phase-Shifted PWM Dimming POWER MANAGEMENT Features Description VIN Range — 4.5V to 27V, VOUT Range — Up to 50V Step-up (Boost) Controller Ultra-Fast Transient Response Integrated Soft-start Programmable Switching Frequency Linear Current Sinks 8 Strings, up to 50mA/String Current Matching ±1% Current Accuracy ±2% PWM Dimming String-by-String Phase Shifting Input Dimming Frequency 100Hz-30kHz User Selectable 9 or 10 Bits Dimming Resolution Optional Synchronization to VSYNC/HSYNC Signal Optional External p-MOSFET Disconnect Switch True Load Disconnect and Inrush Current Limiting I2C Interface Fault Status — Open/Short LED, UVLO, OTP Device Control — SYNC Freq, PLL Setting Protection Features Open/Shorted LED(s) and adjustable OVP Over-Temperature and UVLO Shutdown Protection 4 X 4 X 0.6 (mm) 28-pin QFN Package Applications Notebook PCs, UMPC, LCD Monitors, and Tablet PCs The SC5010H is an 8-channel high-precision, high-efficiency step-up (Boost) LED driver for backlight applications. It features wide input voltage range (4.5V to 27V) , flexible output configuration, wide analog and PWM dimming range, phase shifting and fading. It also features video signal synchronization (VSYNC), I2C interface, and numerous protection features. An optional disconnect p-MOSFET provides true load disconnection and inrush current limiting. The boost controller, with programmable switching frequency from 200kHz to 2.2MHz, maximizes 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 10-50mA per string. It also features PWM dimming resolution of 9 or 10 bits (user selectable) over 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. SC5010H is available in a low-profile, thermally enhanced, 4 X 4 X 0.6(mm) QFN 28-pin package. Typical Application Circuit V IN = 4 .5 to 27 V C2 DRVP DRVN V IN R1 R2 V C C = 4 .5 to 5 .5 V R3 F LT EN SYNC PW MI U V LO F LT IO 1 BG R5 R 10 R 11 C4 R7 C5 R4 S C 5010 H OVP PW MI C3 Q1 CS VCC SYNC R6 Revision 1.0 C1 EN SDA SCL F or I 2 C D 1 V O U T up to 50 V L1 Q2 (O ptional) R8 R9 IO 2 IO 3 IO 4 IO 5 U p to 50 m A /C H IO 6 SCP FSET IS E T C P LL IO 7 IO 8 AGND PGND © 2011 Semtech Corporation