MP2489DN-LF Monolithic Power Systems

MP2489 Step Down White LED Driver with Wide 6V 60V Input Voltage The Future of Analog IC Technology DESCRIPTION FEATURES The MP2489 is a high efficiency step-down Internal 65V MOSFET converter designed in continuous current mode Wide 6V to 60V Input Range for driving the high brightness Light Emitting 1A Output Current Diodes (LED) from wide input voltage 6V60V. High Efficiency (>95%) Hysteresis Control The MP2489 employs hysteretic control architecture to regulate a high accuracy LED PWM & Analog Dimming current, which is measured through an external 1000:1 PWM Dimming Resolution high-side current sensing resistor. Moreover, Thermal Shutdown this control scheme provides optimized circuit Inherent Open LED Protection stabilization and very quick response time Short LED Protection without the loop compensation. Its low 202mV Available in TSOT23-5, QFN6(3x 3mm) and average feedback voltage reduces power loss SOIC8E Packages and improves the converter efficiency. APPLICATIONS The MP2489 implements PWM and analog Low Voltage Halogen Replacement dimming together with DIM pin. Low Voltage General Illumination The MP2489 includes thermal overload Automotive/Decorative LED Lighting protection preventing damage in the event of an Signs/Emergency Lighting output overload. LED Backlighting The MP2489 is available in small QFN6 (3x All MPS parts are lead-free and adhere to the RoHS directive. For MPS green 3mm), TSOT23-5 and SOIC8E 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 D1 V IN R SENSE C IN IN RS L1 MP2489 EN/DIM SW GND MP2489 Rev. 1.23 www.MonolithicPower.com 1 10/11/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2012 MPS. All Rights Reserved. MP2489 STEP DOWN WLED DRIVER WITH WIDE 6V60V INPUT VOLTAGE ORDERING INFORMATION Part Number Package Top Marking TSOT23-5 MP2489DJ* AAD QFN6 (3x 3mm) MP2489DQ 9Y SOIC8E MP2489DN MP2489 * For Tape & Reel, add suffix Z (e.g. MP2489DJZ) For RoHS Compliant Packaging, add suffix LF (e.g. MP2489DJLFZ) PACKAGE REFERENCE TOP VIEW SW 1 8 IN GND 2 7 GND GND 3 6 GND EN/DIM 4 5 RS EXPOSED PAD ON BACKSIDE CONNECT TO GND TSOT23-5 QFN6 (3x 3mm) SOIC8E (1) (4) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC V , V .........................................-0.3V to +65V IN SW TSOT23-5 .............................100 .....55... C/W V ..................................................V -5V to V RS IN IN QFN6 (3mm x 3mm) ..............50 ...... 14... C/W All Other Pins...............................-0.3V to +6.3V SOIC8E ..................................48 ......10... C/W (2) Continuous Power Dissipation (T = +25C) A TSOT23-5 .................................................. 1.3W Notes: 1) Exceeding these ratings may damage the device. QFN6 ......................................................... 2.5W 2) The maximum allowable power dissipation is a function of the SOIC8E...................................................... 2.6W maximum junction temperature T(MAX), the junction-to- J ambient thermal resistance , and the ambient temperature Junction Temperature...............................150C JA T . The maximum allowable continuous power dissipation at A Lead Temperature ....................................260C any ambient temperature is calculated by P (MAX)=(T (MAX)- D J Storage Temperature............... -65C to +150 C T )/ . Exceeding the maximum allowable power dissipation A JA will cause excessive die temperature, and the regulator will go (3) into thermal shutdown. Internal thermal shutdown circuitry 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 60V IN operation conditions. Operating Junction Temp. (T ). -40C to +125C J 4) Measured on JESD51-7, 4-layer PCB. MP2489 Rev. 1.23 www.MonolithicPower.com 2 10/11/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2012 MPS. All Rights Reserved.