MP4688 80V Input, 1A High Power LED Driver The Future of Analog IC Technology DESCRIPTION FEATURES The MP4688 is a high voltage input step-down Wide 4.5V to 80V Operating Input Range switching regulator to deliver a constant current of No Output Capacitor Required up to 1A to high power LEDs. It integrates a high- 5% LED Current Accuracy side high voltage power MOSFET with a current Hysteretic Control: No Compensation limit of 3.2A (typical value). The wide 4.5V to 80V Up to 2MHz Switching Frequency input range accommodates a variety of step-down Up to 20kHz Dimming Frequency applications, making it ideal for automotive, Dedicated PWM Dimming Control Input industry and general lighting applications. Short circuit protection with integrated high Hysteresis current mode control is applied for side MOSFET very fast response, which makes the 20kHz Thermal shut down dimming frequency possible. MPSs proprietary 200mV reference voltage for high efficiency feedback control scheme minimizes the number Up to 95% Efficiency of external components while delivering a LED 170A Quiescent Current current with typical 5% accuracy. Available in SOIC8 and SOIC8 with The switching frequency is up to 2MHz, thus Exposed Pad Packages allowing for small component size. The thermal shut down, short circuit protection, and optional APPLICATIONS output voltage limitation provide reliable, fault High Power LED Driver tolerant operations. A 170A quiescent current Automotive, Industry and General Lighting allows its use in battery-powered applications. Constant Current Source The MP4688 is available in SOIC8 and SOIC8 All MPS parts are lead-free and adhere to the RoHS directive. For MPS green with exposed pad packages. status, please visit MPS website under Quality Assurance. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION MP4688 Rev. 1.2 www.MonolithicPower.com 1 7/15/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved. MP4688 80V INPUT, 1A HIGH POWER LED DRIVER ORDERING INFORMATION Part Number* Package Top Marking Free Air Temperature (T ) A MP4688DN SOIC8E MP4688DN 40C to +85C MP4688DS SOIC8 MP4688DS 40C to +85C * For Tape & Reel, add suffix Z (e.g. MP4688DNZ) For RoHS compliant packaging, add suffix LF (e.g. MP4688DNLFZ) * For Tape & Reel, add suffix Z (e.g. MP4688DSZ) For RoHS compliant packaging, add suffix LF (e.g. MP4688DSLFZ) PACKAGE REFERENCE TOP VIEW FB 1 8 GND N/C 2 7 EN VIN 3 6 DIM BST 4 5 SW SOIC8E SOIC8 (4) (1) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC Supply Voltage (V ) .................... 0.3V to +80V SOIC8E (Exposed Pad) .......... 50 ...... 10 ... C/W IN Switch Voltage (V ) ............ 0.5V to V + 0.5V SW IN SOIC8 ................................... 96 ...... 45 ... C/W BST to SW .................................... 0.3V to +6V Notes: All Other Pins ................................ 0.3V to +6V 1) Exceeding these ratings may damage the device. Junction Temperature .............................. 150C 2) The maximum allowable power dissipation is a function of the (2) (MAX), the junction-to- maximum junction temperature TJ Continuous Power Dissipation (T = +25C) A ambient thermal resistance , and the ambient temperature JA SOIC8E (Exposed Pad) ............................. 2.5W T . The maximum allowable continuous power dissipation at A SOIC8 ........................................................ 1.3W any ambient temperature is calculated by P (MAX)=(T (MAX)- D J T )/ . Exceeding the maximum allowable power dissipation A JA Lead Temperature ................................... 260C will cause excessive die temperature, and the regulator will go Storage Temperature .............. 65C to +150C into thermal shutdown. Internal thermal shutdown circuitry (3) protects the device from permanent damage. Recommended Operating Conditions 3) The device is not guaranteed to function outside of its Supply Voltage V .......................... 4.5V to 75V operating conditions. IN 4) Measured on JESD51-7 4-layer board. EN and DIM Voltages .......................... 0V to 5V Operating Junct. Temp......... 40C to +125C MP4688 Rev. 1.2 www.MonolithicPower.com 2 7/15/2014 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2014 MPS. All Rights Reserved.