MP2487 55V, 1A High Power LED Driver0 pages

MP2487 55V, 1A High Power LED Driver The Future of Analog IC Technology DESCRIPTION The MP2487 is a fixed frequency step-down switching regulator to deliver a constant current of up to 1A to high power LEDs. It integrates a high-side, high voltage power MOSFET with a current limit of 1.5A. The wide 4.5V to 55V input range accommodates a variety of step-down applications, making it ideal for automotive, industry and general lighting applications. Peak current mode control and 200mV reference are applied for fast loop response, easy compensation and accurate LED current regulation. The switching frequency is programmable with an external resistor up to 200kHz, which can prevent EMI (Electromagnetic Interference) noise problems. The thermal shut down provides reliable, fault tolerant operations. A 12p:A quiescent current in shutdown mode allows its use in battery-powered applications. The MP2487 is available in a SOIC8E package. FEATURES  Wide 4.5V to 55V Operating Input Range Օ 220mQ Internal Power MOSFET  Up to 200kHz Programmable Switching Frequency Օ 130p:A Quiescent Current  Ceramic Capacitor Stable Օ Internal Soft-Start  Up to 97.5% Efficiency Օ 200mV Reference Voltage for High Efficiency  Available in a SOIC8E Package APPLICATIONS Օ High Power LED Driver  Automotive, and General Lighting Օ Constant Source "MPS" and "The Future of Analog IC Technology" are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION CCOM2 Efficiency vs. Input Voltage 10 WLED@330mA RCOM CCOM1 Wr-II× COMP VIN ■ cin -ovin 8V to 55V 100 98 96 94 92 90 MP2487 EN BST CONTROLo- rfreq iVA- FREQ SW cbst L1 LED+ CFREQ tחVA- rfb LED- . D1 cout ■ FB GND -H- SS 30 35 40 45 50 55 60 INPUT VOLTAGE(V) MP2487 Rev. 0.9 1/26/2010 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2010 MPS. All Rights Reserved. 1