MP24893 Step Down White LED Driver with Wide 6V-to-36V Input Voltage NOT RECOMMENDED FOR NEW DESIGNS. REFER TO MP24895 DESCRIPTION FEATURES The MP24893 is a high efficiency step-down Internal 36V MOSFET converter designed in continuous current mode Wide 6V-to-36V Input Range for driving the high brightness LEDs from wide 1A Output Current input voltage of 6V to 36V. High Efficiency Hysteretic Control The MP24893 employs hysteretic control architecture to regulate a highly accurate LED PWM and Analog Dimming current, which is measured through an external 1000:1 PWM Dimming Resolution high-side current-sense resistor. Moreover, this UVLO, Thermal Shutdown control scheme provides optimal circuit Available in TSOT23-5 and QFN6 Packages stabilization and a very quick response time APPLICATIONS without loop compensation. Its low 200mV average feedback voltage reduces power loss Low-Voltage Halogen Replacement and improves the converter efficiency. Low-Voltage General Illumination Automotive/Decorative LED Lighting The MP24893 implements PWM and analog Signs/Emergency Lighting dimming together through the DIM pin. LED Backlighting The MP24893 includes under-voltage lockout, All MPS parts are lead-free and adhere to the RoHS directive. For MPS thermal overload protection to prevent damage green status, please visit MPS website under Products, Quality Assurance in the event of an output overload. page. MPS and The Future of Analog IC Technology are registered trademarks of The MP24893 is available in TSOT23-5 and Monolithic Power Systems, Inc. QFN6 packages. TYPICAL APPLICATION D 1 V R IN SENSE C 6 V - 36 V IN IN RS L1 MP 24893 EN/ DIM SW GND MP24893 Rev.1.02 www.MonolithicPower.com 1 12/7/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved. MP24893 STEP DOWN WLED DRIVER WITH WIDE 6V-TO-36V INPUT VOLTAGE NOT RECOMMENDED FOR NEW DESIGNS. REFER TO MP24895 ORDERING INFORMATION Part Number Package Top Marking TSOT23-5 MP24893DJ* ABD QFN6 (3x3mm) MP24893DQ** ABD * For Tape & Reel, add suffix Z (e.g. MP24893DJZ) For RoHS Compliant Packaging, add suffix LF (e.g. MP24893DJLFZ) * *For Tape & Reel, add suffix Z (e.g. MP24893DQZ) For RoHS Compliant Packaging, add suffix LF (e.g. MP24893DQLFZ) PACKAGE REFERENCE TSOT23-5 QFN6 (3x3mm) (4) (1) Thermal Resistance JA JC ABSOLUTE MAXIMUM RATINGS TSOT23-5 ............................. 110 ..... 55 ... C/W V , V ......................................... -0.3V to +40V IN SW QFN6 (3x3mm) ...................... 50 ...... 14 ... C/W V .................................................. V -5V to V RS IN IN All Other Pins ............................... -0.3V to +6.3V Notes: (2) Continuous Power Dissipation (T = +25C) A 1) Exceeding these ratings may damage the device. TSOT23-5 .................................................. 1.1W 2) The maximum allowable power dissipation is a function of the maximum junction temperature T (MAX), the junction-to- J QFN6 (3x3mm) .......................................... 2.5W ambient thermal resistance , and the ambient temperature JA Junction Temperature ............................... 150C T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX)=(T (MAX)- Lead Temperature .................................... 260C D J T )/ . Exceeding the maximum allowable power dissipation A JA Storage Temperature ............... -65C to +150C will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry (3) Recommended Operating Conditions protects the device from permanent damage. 3) The device is not guaranteed to function outside of its Supply Voltage V .............................. 6V to 36V IN operation conditions. Operating Junction Temp. (T ). -40C to +125C J 4) Measured on JESD51-7 4-layer board. MP24893 Rev.1.02 www.MonolithicPower.com 2 12/7/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2021 MPS. All Rights Reserved.