MP3309CGQG-Z

MP3309C 2.7V-5.5V Input, 38V Output, FSW Programmable, White LED Driver with I2C Interface DESCRIPTION FEATURES The MP3309C is a WLED step-up converter for 2.7V to 5.5V input that uses peak current mode to regulate the LED current sensed through an external low-side resistor. The 200mV feedback voltage and synchronous rectification reduces power loss and reduces PCB space requirements. For non-synchronous mode, setting an internal register can disable the rectifier MOSFET to save driver losses. • • • • • • • • The MP3309C features a programmable switching frequency to optimize efficiency. It supports both analog and PWM dimming. • • • In addition, the MP3309C has LED open protection, cycle-by-cycle current limit protection, thermal shutdown protection, and VOUT to GND short-circuit protection. The I2C interface can set the protection indication bits and over-voltage protection point. 2.7V to 5.5V Input Voltage Analog and PWM Dimming Selectable Synchronous or Nonsynchronous Mode 400kHz I2C-Compatible Interface Digitally Set LED Current Programmable Switching Frequency Programmable Open Load Protection Point Low 200mV Feedback Voltage with ±1% Accuracy at Room Temperature Software Enable Function UVLO, Thermal Shutdown Available in a 1.4mmx1.8mm QFN10 Package APPLICATIONS • • • Feature Phones and Smart Phones Tablets