MP24892 Step Down White LED Driver with Wide 6V 45V Input Voltage The Future of Analog IC Technology DESCRIPTION FEATURES The MP24892 is a high-efficiency step-down Wide 6V-to-45V Input Range converter that functions in continuous current 1A Output Current mode to drive high-brightness LED. It can take High Efficiency (>95%) a wide input voltage range of 6V45V. Hysteresis Control PWM & Analog Dimming The MP24892 employs a hysteretic control 1000:1 PWM Dimming Resolution architecture to regulate a high-accuracy LED current, which is measured through an external Thermal Shutdown high-side current-sensing resistor. Moreover, Inherent Open LED Protection this control scheme provides optimal circuit Short LED Protection stabilization and a very quick response time Available in a TSOT23-5 Package without loop compensation. Its low 202mV APPLICATIONS average feedback voltage reduces power loss and improves the converter efficiency. Low-Voltage Halogen Replacement Low-Voltage General Illumination The MP24892 implements PWM and analog Automotive/Decorative LED Lighting dimming together through the DIM pin. Signs/Emergency Lighting The MP24892 includes thermal overload LED Backlighting protection that prevents damage in the event of All MPS parts are lead-free and adhere to the RoHS directive. For MPS an output overload. green status, please visit MPS website under the Products, Quality Assurance page. The MP24892 is available in a small TSOT23-5 MPS and The Future of Analog IC Technology are Registered Trademarks of package. Monolithic Power Systems, Inc. TYPICAL APPLICATION D1 V IN 45 R SENSE C IN IN RS L1 MP24892 EN/DIM SW GND MP24892 Rev. 1.0 www.MonolithicPower.com 1 11/3/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. MP24892 STEP DOWN WLED DRIVER WITH WIDE 6V45V INPUT VOLTAGE ORDERING INFORMATION Part Number Package Top Marking TSOT23-5 MP24892DJ* ABHY * For Tape & Reel, add suffix Z (e.g. MP24892DJZ) PACKAGE REFERENCE TSOT23-5 (4) (1) Thermal Resistance JA JC ABSOLUTE MAXIMUM RATINGS TSOT23-5 ............................. 100 ..... 55 ... C/W V , V ......................................... -0.3V to +50V IN SW V .................................................. V -5V to V RS IN IN Notes: All Other Pins ............................... -0.3V to +6.3V 1) Exceeding these ratings may damage the device. (2) 2) The maximum allowable power dissipation is a function of the Continuous Power Dissipation (T = +25C) A maximum junction temperature T(MAX), the junction-to- J TSOT23-5 ................................................ 1.25W ambient thermal resistance , and the ambient temperature JA Junction Temperature ............................... 150 C T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX)=(T (MAX)- D J Lead Temperature .................................... 260 C T )/ . Exceeding the maximum allowable power dissipation A JA Storage Temperature ............... -65C to +150 C will cause excessive die temperature, and the regulator will go 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 .............................. 6V to 45V operation conditions. IN 4) Measured on JESD51-7, 4-layer PCB. Maximum Junction Temp. (T ) -40C to +125C J MP24892 Rev. 1.0 www.MonolithicPower.com 2 11/3/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved.