MP3309C Datasheet | Monolithic Power Systems

DESCRIPTION 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 200m V 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. FEATURES - 2.7V to 5.5V Input Voltage - Analog and PWM Dimming - Selectable Synchronous or Non- synchronous Mode - 400k Hz I2C-patible Interface - Digitally Set LED Current - Programmable Switching Frequency - Programmable Open Load Protection Point - Low 200m V 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 - <10in Video Displays All MPS parts are lead-free and adhere to the Ro HS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION C1 SCL SDA EN/PWML R2 L1 C2 SW BST C3 VOUT MP3309C SDA...