MPQ4425B Datasheet | Monolithic Power Systems

DESCRIPTION The MPQ4425B is a high-frequency, synchronous, rectified, step-down, switch-mode white LED driver with built-in power MOSFETs. It offers a pact solution to achieve a 1.5A of continuous output current with excellent load and line regulation over a wide input supply range. Synchronous mode operation ensures high efficiency, while current mode operation provides fast transient responses and eases loop stabilization. Additional features include over-current protection (OCP) and thermal shutdown (TSD). This device requires a minimal number of readily available, external ponents, and is available in space-saving QFN-13 (2.5mmx3mm) and TSOT23-8 packages. FEATURES - Wide 4V to 36V Operating Input Range - 85mΩ/50mΩ Low RDS(ON) Internal Power MOSFETs - High-Efficiency Synchronous Mode Operation - Default 400k Hz Switching Frequency - PWM Dimming (Min 100Hz Dimming Frequency) - Forced CCM Mode - 0.2V Reference Voltage - Internal Soft Start - Fault Indication for LED Short, Open, and Thermal Shutdown - Over-Current Protection (OCP) with Valley- Current Detection - Thermal Shutdown - CISPR25 Class 5 pliant - Available in QFN-13 (2.5mmx3mm) and TSOT23-8 Packages - Available in AEC-Q100 Grade 1 APPLICATIONS - Automotive LED Lighting All MPS parts are lead-free, halogen free, and adhere to the Ro HS directive. For MPS green status, please visit the MPS website under Quality Assurance. “MPS,” the MPS logo, and “Simple, Easy Solutions” are registered trademarks of Monolithic Power Systems, Inc. or its subsidiaries. TYPICAL APPLICATION EN/DIM /FAULT EN/DIM VCC FB /FAULT PGND AGND LED+ LED- EFFICIENCY (%) Efficiency vs. Input Voltage VLED =...