EV3204DJ-00A fixed frequency white led driver evaluation board EV3204DJ-00A rev. 1.1 www.monolithicpower.com 1 7/13/2005 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. the future of analog ic technology tm tm general description the mp3204 is a step-up converter designed for driving up to 5 series white leds from a single cell lithium ion battery. the mp3204 uses current mode, fixed frequency architecture to regulate the led current, which is measured through an external current sense resistor. its low 104mv feedback voltage reduces power loss and improves efficiency. the ov pin monitors the output voltage and turns off the converter if an over-voltage condition is present due to an open circuit condition. the mp3204 includes under-voltage lockout, current limiting and thermal overload protection preventing damage in the event of an output overload. electrical specification parameter symbol value units input voltage v in 2.5 to 6 v number of wleds 1 to 5 features ? on board power mosfet ? drives up to 5 series white leds ? up to 87% efficiency ? over 1mhz fixed switching frequency ? open load shutdown ? low 104mv feedback voltage ? soft-start/pwm dimming ? uvlo, thermal shutdown ? internal current limit applications ? cell phones ? handheld computers and pdas ? digital still cameras ? small lcd displays application ?mps? and ?the future of analog ic technology? are trademarks of monolithic power systems, inc. EV3204DJ-00A evaluation board dimensions (1.9?x x 1.8?y x 0.4?z) board number mps ic number EV3204DJ-00A mp3204dj 88 87 86 85 84 83 82 81 80 79 78 77 efficiency (%) 5 101520 led current (ma) mp3204-ec01 efficiency vs led current 3 leds 4 leds v in =3.6v 5 leds
EV3204DJ-00A ? fixed frequency white led driver evaluation board EV3204DJ-00A rev. 1.1 www.monolithicpower.com 2 7/13/2005 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. tm evaluation bo ard schematic off on mp3204 v in led3 led1 led2 led4 led5 ev3204_s01 d1 b0530ws-7 30v 500ma u1 in en gnd ov fb sw EV3204DJ-00A bill of materials qty ref value description package manufacturer manufacturer p/n 1 c1 2.2f ceramic capacitor, 10v, x5r 0805 tdk c2012x5r1a225k 1 c2 0.22f ceramic capacitor, 25v, x7r 0805 tdk c2012x7r1e224k 1 d1 diode schottky, 30v, 0.5a sod-323 diodes inc. b0530ws-7 1 l1 22h inductor, 330ma d31fb toko 984fb-220m 5 led1, led2, led3, led4, led5 not stuffed 1 r1 100k ? resistor, 5% 0805 panasonic erj-6geyj104v 1 r2 5.1 ? resistor, 1% 0805 panasonic erj-6geyj5r1v 1 u1 fixed frequency, white led driver tsot23-6 mps mp3204dj
EV3204DJ-00A ? fixed frequency white led driver evaluation board notice: the information in this document is subject to change wi thout notice. please contact mps for current specifications. users should warrant and guarantee that th ird party intellectual property rights are not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. EV3204DJ-00A rev. 1.1 www.monolithicpower.com 3 7/13/2005 mps proprietary information. unauthorized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. tm printed circuit board layout figure 1?top silk layer figure 2?top layer quick start guide 1. solder led1 through led5 to the board. 2. connect the positive and negative terminals of power supply (2.5v to 6v) to vin and gnd pins, respectively. 3. drive en high to turn on the mp3204; low to shut it down. 4. to use burst-mode brightness control, drive en with a pwm signal.
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