EV1541DJ-TFT-00A mp1541 tft applications evaluation board evaluation board EV1541DJ-TFT-00A rev. 1.0 www.monolithicpower.com 1 6/8/2005 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. the future of analog ic technology tm tm general description the EV1541DJ-TFT-00A is the evaluation board for tft applications using the mp1541. the mp1541 is a 5-pin thin sot23 current mode step up converter intended for small, low power applications. the mp1541 switches at 1.3mhz and allows the use of tiny, low cost capacitors and inductors 2mm or less in height. internal soft start results in small inrush current and extends battery life. the mp1541 operates from an input voltage as low as 2.5v and can generate 12v at up to 200ma from a 5v supply. the EV1541DJ-TFT-00A provides v out from the boost output and also derives v p (positive) and v n (negative) from the charge pumps off of the boost switching node. electrical specifications parameter symbol value units input voltage v in 3 ? 3.6 v output voltage 1 v out 5 v output current 1 i out 200 ma output voltage 2 v n ?10 v output current 2 i n 10 ma output voltage 3 v p 15 v output current 3 i p 20 ma features ? 3v to 3.6v operating input range ? uses tiny capacitors and inductors ? 1.3mhz fixed switching frequency ? internally compensated ? internal soft start ? 3 outputs in a single package: boost converter for 5v, charge pump for 15v, and negative charge pump for ?10v ? uvlo, thermal shutdown ? internal current limit ? available in a tsot23-5 package applications ? handheld computers and pdas ? digital still and video cameras ? small lcd displays ?mps? and ?the future of analog ic technology?, are trademarks of monolithi c power systems, inc. EV1541DJ-TFT-00A evaluation board dimensions (2.0?x x 2.0?y x 0.4?z) board number mps ic number EV1541DJ-TFT-00A mp1541dj
EV1541DJ-TFT-00A ? mp1541 tft applications evaluation board evaluation board EV1541DJ-TFT-00A rev. 1.0 www.monolithicpower.com 2 6/8/2005 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. tm evaluation board schematic en gnd vin 3.3v ev1541_tft_s01 vout 5v @ 200ma vgl vn --10v @ 10ma gnd c2 ns c17 ns zd2 ns r4 ns vout vin vout vin jp1 sw sw r7 ns optional for 3x mode d1 mp1541 fb sw 5 4 2 3 1 u1 en in gnd jp2 d7 d6 d5 sw d4 d3 d2 c10 ns zd1 ns r6 ns vp 15v @ 20ma vgh
EV1541DJ-TFT-00A ? mp1541 tft applications evaluation board evaluation board EV1541DJ-TFT-00A rev. 1.0 www.monolithicpower.com 3 6/8/2005 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. tm EV1541DJ-TFT-00A bill of materials qty ref value description package manufacturer manufacturer p/n 1 c1 10f ceramic cap, 10v, x5r 1210 tdk c3225x5r1a106k 3 c2, c10, c17 ns not stuffed 1 c3 4.7f ceramic cap, 10v, x5r 1210 taiyo yuden lmk325bj475kd 10 c4, c5, c6, c7, c8, c11, c12, c13, c14, c15 0.1f ceramic cap, 50v, x7r 0805 tdk c2012x7r1h1 04k 2 c9, c16 1f ceramic cap, 25v, x5r 0805 tdk c2012x5r1e105k 1 d1 schottky diodes, 40v, 1a sod-123 diodes inc 1n5819hw-7 6 d2, d3, d4, d5, d6, d7 diode rectifier, dual, 30v, 200ma sot-123 fairchild bat54s 2 jp1, jp2 3-pin connector header, 0.100 sullins ptc03saan 1 l1 3.3h 1.6a sumida cdrh4d28cld-3r3 1 r1 30.1k ? metal film res, 1% 0805 panasonic erj-6enf3012v 1 r2 10k ? metal film res, 1% 0805 panasonic erj-6enf1002v 2 r3, r5 100k ? metal film res, 5% 0805 panasonic erj-6geyj104v 3 r4, r6, r7 ns not stuffed 1 u1 dc-dc converter tsot23-5 mps mp1541dj 2 zd1, zd2 ns not stuffed
EV1541DJ-TFT-00A ? mp1541 tft applications evaluation board evaluation board EV1541DJ-TFT-00A rev. 1.0 www.monolithicpower.com 4 6/8/2005 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. tm printed circuit board layout figure 1?top silk layer figure 2?top layer figure 3?bottom layer
EV1541DJ-TFT-00A ? mp1541 tft applications evaluation board 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 third party intellectual property rights ar e not infringed upon when integrating mps products into any application. mps will not assume any legal responsibility for any said applications. EV1541DJ-TFT-00A rev. 1.0 www.monolithicpower.com 5 6/8/2005 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2005 mps. all rights reserved. tm quick start guide the output voltage of this board is set to 5v, ?10v and 15v on vout, vn and vp, respectively. the board layout accommodates most commonly used inductors and output capacitors. 1. preset the power supply to 3v v in 3.6v. 2. turn off the power supply. 3. connect the power supply terminals to: a. positive (+): vin, en b. negative (?): gnd 4. connect the load to: a. positive (+): vout, vp, gnd (for the negative output) b. negative (?): gnd, vn (for the negative output) 5. turn on the power supply after making the connections. 6. the mp1541 is disabled on the evaluation board if only vin is applied. to enable the mp1541, en needs to be pulled high. 7. the output voltage v out can be changed by varying r1. calculate the new value using the formula: 2 r 1 v v 1 r fb out ? ? ? ? ? ? ? ? ? = where v fb = 1.25v and r2 = 10k ? for example, for v out = 7.5v ? = ? ? ? ? ? ? ? ? = k 50 k 10 1 v 25 . 1 v 5 . 7 1 r therefore use a 49.9k ? standard 1% value resistor.
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