LM3633

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM3633 SNVS867 – JUNE 2014 LM3633 Complete Lighting Power Solution for Smartphone Handsets Check for Samples: LM3633 1 Features 1 Drives Three Parallel High-Voltage LED Strings for Display and Keypad Lighting High-Voltage Strings Capable of up to 40-V Output Voltage and up to 90% Efficiency Up to 30-mA per Current Sink (Both Backlight and Indicator) 11-Bit High-Voltage LED Dimming PWM Input for Content Adjustable Brightness Control (CABC) Integrated 1-A/40-V MOSFET Adaptive Boost Output to LED Voltages Six Low-Voltage Current Sinks for Indicator LEDs Integrated Charge Pump for Improved Efficiency and VIN Operating Range Internal Pattern Generation Engine for Each Indicator LED Fully Configurable LED Grouping and Control Four Programmable Overvoltage Protection Thresholds (16 V, 24 V, 32 V, and 40 V) Programmable 500-kHz and 1-MHz Switching Frequency Overcurrent Protection Thermal Shutdown Protection 27 mm2 Total Solution Size 2 Applications Power Source for Smart Phone Illumination Display, Keypad and Indicator Illumination RGB Indicator Driver space Simplified Schematic L 2.7V to 5.5V VIN CIN D1 VOUT up to 40V COUT SDA SCL HWEN PWM IN SW OVP LM3633 C+ C- SDA SCL HWEN HVLED1 HVLED2 HVLED3 CPOUT PWM PGND LVLED1 LVLED2 LVLED3 LVLED4 LVLED5 LVLED6 CP CPOUT 3 Description The LM3633 11-bit LED driver provides highperformance backlight...