MP24894GJ-P Monolithic Power Systems

MP24894 Step-Down WLED-Current Controller with Wide 6V to 60V Input Voltage The Future of Analog IC Technology DESCRIPTION FEATURES The MP24894 is a high-efficiency step-down Wide 6V to 60V Input Range controller. It is designed to operate in Able to Drive >1A LED Load continuous current mode (CCM) to power LEDs Hysteresis Control of high-brightness with a wide input voltage High Efficiency (>95%) range of 6V to 60V. 2500:1 PWM Dimming Ratio Open LED Protection The MP24894 employs a hysteretic control architecture that accurately regulates LED Short LED Protection current with a feedback coming from an external Thermal Shutdown high-side current-sense resistor. This control scheme optimizes circuit stabilization and fast APPLICATIONS response time without loop compensation. Its low 200mV average feedback voltage reduces Low Voltage Halogen Replacement power loss and improves the converters Low Voltage General Illumination efficiency. Automotive/Decorative LED Lighting Signs/Emergency Lighting The MP24894 implements PWM and analog LED Backlighting dimming together through the EN/DIM pin. All MPS parts are lead-free and adhere to the RoHS directive. For MPS green The MP24894 includes thermal overload status, please visit MPS website under Quality Assurance. MPS and The protection in case of output overload. Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. The MP24894 is available in TSOT6 package. TYPICAL APPLICATION D1 V IN 6V-60V R SENSE C IN IN RS VCC L1 MP24894 EN/DIM DR GND MP24894 Rev 1.01 www.MonolithicPower.com 1 12/20/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2012 MPS. All Rights Reserved. MP24894 STEP-DOWN LED-CURRENT CONTROLLER WITH WIDE 6V TO 60V INPUT VOLTAGE ORDERING INFORMATION Part Number* Package Top Marking TSOT6 MP24894GJ ACG * For Tape & Reel, add suffix Z (e.g. MP24894GJZ) PACKAGE REFERENCE IN 1 6 VCC 5 DR RS 2 EN/DIM34 GND TSOT6 (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC V .................................................-0.3V to +65V IN TSOT6 ..................................100.....55...C/W V ..............................................(V - 5V) to V RS IN IN All Other Pins...............................-0.3V to +6.5V Notes: (2) Continuous Power Dissipation (T = 25C) A 1) Exceeding these ratings may damage the device. 2) The maximum allowable power dissipation is a function of the TSOT6.....................................................1.25W maximum junction temperature T(MAX), the J Junction Temperature...............................150C junction-to-ambient thermal resistance , and the ambient JA Lead Temperature ....................................260C temperature T . The maximum allowable continuous power A dissipation at any ambient temperature is calculated by Storage Temperature............... -65C to +150C P (MAX)=(T (MAX)-T )/ . Exceeding the maximum D J A JA (3) allowable power dissipation will cause excessive die Recommended Operating Conditions temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from Supply Voltage V ..............................6V to 60V IN permanent damage. Operating Junction Temp. (T ). -40C to +125C J 3) The device is not guaranteed to function outside of its operation conditions. 4) Measured on JESD51-7, 4-layer PCB. MP24894 Rev 1.01 www.MonolithicPower.com 2 12/20/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2012 MPS. All Rights Reserved.