EV8110DS-00A precision high-side current sense amplifier EV8110DS-00A rev. 1.0 www.monolithicpower.com 1 10/19/2007 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2007 mps. all rights reserved. the future of analog ic technology description the EV8110DS-00A is an evaluation board for the mp8110, a low-cost, precision, high-side current-sense amplifier. the input voltage ranges from 2.5v to 40v. the output voltages are proportional to the load current with a 1v output corresponding to 5a of load current. the mp8110 operates from a single 2.5v to 40v supply and typically consumes 17a. it is ideal for today?s notebook computers, cell phones and other systems where battery/dc current monitoring is critical. high-side current monitoring is especially useful in battery-powered systems since it does not interfere with the ground path of the battery charger. the input common-mode range of 1.4v to 40v is independent of the supply voltage and ensures that the current-sense feedback remains viable even when connected to a 2-cell battery pack in deep discharge. electrical specifications parameter symbol value units input voltage v in =v cc 2.5 ? 40 v load current i load 0 ? 5 a output voltage 1 v out1 0 ? 1 v output voltage 2 v out2 0 ? 1 v features ? 2.5v to 40v operating supply voltage ? 1.4v to 40v input common mode range ? fully assembled and tested applications ? portable pcs ? pda?s ? smart battery packs ? cell phones ? portable test/measurement systems ? battery-operated systems ? energy management systems ?mps? and ?the future of analog ic technology?, are trademarks of monolithic power systems, inc. EV8110DS-00A evaluation board (l x w x h) 1.7? x 1.6? x 0.6? (4.4cm x 4.2cm x 1.4cm) board number mps ic number EV8110DS-00A mp8110ds 1000 800 600 400 200 0 v out1/2 (mv) 012345 load current (a) ev8100_ec01 output voltage vs load current v in =5v
EV8110DS-00A ? precision high-side current sense amplifier EV8110DS-00A rev. 1.0 www.monolithicpower.com 2 10/19/2007 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2007 mps. all rights reserved. evaluation board schematic c3 100pf c5 100nf c1 ns vout vin shdn jp1 jp2 gnd out2 mp8110 rg2 out2 vcc out1 gnd rg1 6 8 5 4 1 3 7 shdn c4 ns u1 gnd out1 r5 100k EV8110DS-00A bill of materials qty ref value description package manufacturer p/n 1 c3 100pf ceramic cap., 50v, npo 805 tdk 1 c5 100nf ceramic cap., 50v, x7r 805 tdk 1 c2 ns electrolytic cap, 50v f60 united chemi-con 1 c4 ns do not stuff 805 1 c1 ns do not stuff 805 2 r1, r2 2k ohm film res., 1% 805 panasonic 1 r3 20k ohm film res., 1% 805 panasonic 1 r4 0.02 ohm film res., 1% 2512 panasonic 1 r5 100k ohm film res., 5% 805 panasonic
EV8110DS-00A ? precision high-side current sense amplifier EV8110DS-00A rev. 1.0 www.monolithicpower.com 3 10/19/2007 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2007 mps. all rights reserved. printed circuit board layout figure 1?top silk layer figure 2?top layer figure 3?bottom layer
EV8110DS-00A ? precision high-side current sense amplifier 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. EV8110DS-00A rev. 1.0 www.monolithicpower.com 4 10/19/2007 mps proprietary information. unaut horized photocopy and duplication prohibited. ? 2007 mps. all rights reserved. quick start guide 1. preset the power supply to 2.5v v in 40v. 2. turn the power supply off. 3. connect the power supply terminals to: a. positive (+): vin b. negative (-): gnd 4. connect the load to: a. positive (+): vout b. negative (-): gnd 5. make sure jumper jp1 is installed. 6. turn on the power supply. the mp8110 is enabled one the evaluation board once v in is applied. to disable the mp8110, remove jumper jp1. output voltage 1 and output voltage 2 are obtained across resistor r3 and capacitor c1, respectively. the output voltages can be calculated as: load load 2 out 1 out i 2 . 0 3 r 1 r 4 r i v v = = = where r4=20m ? , r1=r2=2k ? and r3=20k ? . 7. jp2 is a jumper to set v cc. if v in = v cc , jp2 jumper should be installed, otherwise using external power supply to supply v cc and v cc v in .
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