MP3310 50V, 1.3A, Step-up White LED Driver with True PWM Dimming The Future of Analog IC Technology DESCRIPTION FEATURES Internal 0.3 Power MOSFET The MP3310 is a monolithic step-up converter Wide 4.5V to 25V Operating Input Range designed for driving arrays of WLEDs from a wide input supply range. The MP3310 uses Drives up to 12 Series White LEDs current mode, fixed frequency architecture to Up to 93% Efficiency regulate the LED current to user programmed True PWM Dimming value set by an external current setting resistor. Adjustable Switching Frequency The switching frequency is also programmable Adjustable Open Load Shutdown Voltage with an external resistor. Internal 1.3A Current Limit UVLO, Thermal Shutdown The MP3310 features true PWM dimming, Available in 3mm x 3mm QFN10 Package which allows the flexible control of the backlighting luminance under wide range of the APPLICATIONS ambient brightness. LCD Panels The MP3310 is turned off if an over-voltage Digital Picture Frames condition is present due to an open circuit Handheld Computers and PDAs condition. Use one external resistor voltage Digital Still Cameras divider to program OVP threshold. The MP3310 Small LCD Displays also includes under-voltage lockout, current limiting and thermal overload protection For MPS green status, please visit MPS website under Quality Assurance. preventing damage in the event of an output MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. overload. The MP3310 is available in small 10-pin QFN 3x3mm package. TYPICAL APPLICATION VIN vs. Efficiency 100 95 90 85 80 75 70 4 8 12 16 20 24 V (V) IN MP3310 Rev.1.0 www.MonolithicPower.com 1 7/5/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved. EFFICIENCY (%)MP331050V, 1.3A, STEP-UP WHITE LED DRIVER WITH TRUE PWM DIMMING ORDERING INFORMATION Part Number* Package Top Marking Free Air Temperature (T ) A MP3310EQ QFN10 (3mm x 3mm) 5R -20 C to +85 C * For Tape & Reel, add suffix Z (e.g. MP3310EQZ) For RoHS Compliant Packaging, add suffix LF (e.g. MP3310EQLFZ) PACKAGE REFERENCE (4) (1) Thermal Resistance JA JC ABSOLUTE MAXIMUM RATINGS QFN10 (3mm x 3mm) ...........50......12... C/W V .................................................-0.3V to +30V IN V , V .......................................-0.3V to +50V SW LED 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 .............................................................2.5W ambient thermal resistance , and the ambient temperature JA T . The maximum allowable continuous power dissipation at A Junction Temperature...............................150C any ambient temperature is calculated by P (MAX)=(T (MAX)- D J Lead Temperature ....................................260C T )/ . Exceeding the maximum allowable power dissipation A JA will cause excessive die temperature, and the regulator will go Storage Temperature............... -65C to +150 C into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. (3) 3) The device is not guaranteed to function outside of its Recommended Operating Conditions operation conditions. Supply Voltage V ...........................4.5V to 25V 4) Measured on JESD51-7 4-layer board. IN Operating Junc Temp T .......... -20C to +125 C J MP3310 Rev.1.0 www.MonolithicPower.com 2 7/5/2011 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. 2011 MPS. All Rights Reserved.