MP3202DJ-LF-P Monolithic Power Systems

MP3202 1.3A Fixed Frequency White LED Driver The Future of Analog IC Technology DESCRIPTION FEATURES The MP3202 is a step-up converter designed for 2.5V to 6V Input Voltage Range driving up to 39 white LEDs (13 strings of 3 LEDs On Board Power MOSFET each) from a 5V system rail. The MP3202 uses a Drives up to 39 White LEDs at 5V Input current mode, fixed frequency architecture to Up to 92% Efficiency regulate the LED current, which is measured Over 1MHz Fixed Switching Frequency through an external current sense resistor. Its low Open Load Shutdown 104mV feedback voltage reduces power loss and Low 104mV Feedback Voltage improves efficiency. The OV pin monitors the Soft-Start/PWM Dimming output voltage and turns off the converter if an UVLO, Thermal Shutdown over-voltage condition is present due to an open Internal 1.3A Current Limit circuit condition. Available in TSOT23-6 and QFN8 Packages The MP3202 includes under-voltage lockout, APPLICATIONS current limiting and thermal overload protection preventing damage in the event of an output Cell Phones overload. Handheld Computers and PDAs Digital Still Cameras The MP3202 is available in small 6-pin TSOT23 Small LCD Displays or 8-pin QFN (2mm x 2mm) packages. MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION Efficiency vs V IN Input Voltage 4.5V - 6V 100 I =100mA OUT 90 13 Strings I =180mA OUT 80 IN SW EN OV EN MP3202 70 GND FB 60 50 4.0 4.5 5.0 5.5 6.0 INPUT VOLTAGE (V) MP3202 Rev. 0.91 www.MonolithicPower.com 1 9/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2007 MPS. All Rights Reserved. EFFICIENCY (%)MP3202 1.3A FIXED FREQUENCY WHITE LED DRIVER PACKAGE REFERENCE TOP VIEW TOP VIEW GND 1 8 SW SW 1 6 IN IN 2 7 NC GND 2 5 OV OV 3 6 FB FB 3 4 EN EN 4 5 GND Part Number* Package Temperature Part Number** Package Temperature QFN8 MP3202DG 40 C to +85C MP3202DJ TSOT23-6 40 C to +85C (2mm x 2mm) For Tape & Reel, add suffix Z (eg. MP3202DGZ) For Tape & Reel, add suffix Z (eg. MP3202DJZ) ** * For RoHS compliant packaging, add suffix LF For RoHS compliant packaging, add suffix LF (eg. MP3202DGLFZ) (eg. MP3202DJLFZ) (3) (1) ABSOLUTE MAXIMUM RATINGS Thermal Resistance JA JC SW Pin......................................0.5V to +28.5V TSOT23-6.............................. 220.... 110.. C/W All Other Pins..............................0.3V to +6.5V QFN8 (2mm x 2mm)............... 80...... 16... C/W Storage Temperature.............. 55 C to +150 C Notes: (2) 1) Exceeding these ratings may damage the device. Recommended Operating Conditions 2) The device is not guaranteed to function outside of its IN Supply Voltage ..............................2.5V to 6V operating conditions. 3) Measured on approximately 1 square of 1 oz copper. Output Voltage....................................V to 25V IN Operating Temperature............. 40 C to +85 C ELECTRICAL CHARACTERISTICS V = V = 5V, T = +25 C, unless otherwise noted. IN EN A Parameters Symbol Condition Min Typ MaxUnits Operating Input Voltage V 2.5 6 V IN Supply Current (Shutdown) V = 0V 0.1 1 A EN Supply Current (Quiescent) V = 0.15V 690 750 A FB Switching Frequency f 1.0 1.3 1.5 MHz SW Maximum Duty Cycle V = 0V 85 92 % FB Under Voltage Lockout IN Under Voltage Lockout UVLO V Rising 2.25 2.45 V IN Under Voltage Lockout 92 mV Hysteresis Open Lamp Shutdown V V Rising 28 V OV OV Threshold MP3202 Rev. 0.91 www.MonolithicPower.com 2 9/21/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2007 MPS. All Rights Reserved.