lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 1 copyright ? 2002 rev. 1.2, 2004-06-25 lx2201 single cell lithium ion battery charger evaluation board user guide tm ?
lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 2 copyright ? 2002 rev. 1.2, 2004-06-25 t able of c ontents introduction ............................................................................................................................... ........................3 schematic ...................................................................................................................... ....................................4 ic block diagram ............................................................................................................... ................................5 evaluation board information................................................................................................... ..........................6 evaluation boar d hook up ....................................................................................................... ..........................7 evaluation boar d drawing ....................................................................................................... ..........................8 evaluation board b ill of mate rials ............................................................................................. .........................9
lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 3 copyright ? 2002 rev. 1.2, 2004-06-25 i ntroducing to p roduct the lx2201 evaluation board is available from microsemi for evaluating the performance of the lx2201 battery charger integrated circuit. (see picture 1) the evaluati on board contains a small amount of support circuitry that enhances performance in different power configurations. (see sch ematic 1.) in a typical application, a subset of the support circuitry could be utilized. k ey f eatures of the lx2201 ? usb compliant charging states ? small, high power 20-lead mlp package ? internal pass element can function as a reverse direction load switch ? no sense resistor required ? full capacity charging ? always cool running ? 4.1 or 4.2v applications ? tolerates 5v + 10% wall supply regulation ? conditioning mode for deep discharge ? built in mosfet driver for easy ac adapter/usb implementation ? topping charge for long periods of non-use. ? inherent load disconnect a pplications ? batteries with 350mah to 2ah ratings ? cell phones ? pdas ? charging cradles ? digital cameras ? low cost single l-ion cell chargers p art s pecific i nformation part number temp range product description lx2201 -65 to 150c usb li-ion battery charger table 1 ? part information ic e valuation b oards lx2201 lx2201 eval table 2 ? evaluation board information
lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 4 copyright ? 2002 rev. 1.2, 2004-06-25 s chematic part lx2201 vdd vdd vdd v in vdd gnd cus ctp ccp stat cmp bat bat bat bat nc psw vid1 vid0 vm vin vdd bat c4 0.1f vdd r7 470 d5 upgled ccp ctp cus 2.5k 150k 75k c1 10f 10v d2 b220/a q2 irlms6802 d4 ups5817 d3 ups5817 psw ac2 vdd ac1 usb1 usb2 gnd + _ vdd discharge load r10 47k r9 47k r8 47k 4.1v 4.2v vm vid1 vid0 hi lo hi lo vdd vbat c3 10f 10v battery output battery output q5 dmmt3906w r12 100k r13 576k r14 499k r15 499k r11 499k conn3 1 2 3 4 5 678910 11 12 13 14 15 psw 16 17 18 19 20 1 2 1 2 3 inputs 5 4 6 1256 3 4 1 2 3 1 5 4 2 3 6 2 1 1 2 3 logic pullup 1 2 3 1 2 3 1 2 3 figure 1 ? lx2201 evaluation board schematic
lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 5 copyright ? 2002 rev. 1.2, 2004-06-25 ic b lock d iagram vin 0.1 vdd bat charge/ discharge control gnd constant current control ccp temperature control constant voltage control usb limit control cus vm charge termination control ctp vid1 vid0 psw stat cmp figure 2 ? simplified block diagram
lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 6 copyright ? 2002 rev. 1.2, 2004-06-25 e valuation b oard c onnectors the lx2201 evaluation board has three connectors. function label on board input power p1 battery battery output system load discharge load table 3 ? connector types precautions: before connecting or disconnecting the battery or system load, set the vid0 and vid1 jumpers to the lo state and put con7 in the bat position. make sure the system load is less than 3 amperes continuous current. make sure the battery polarity and system load polarity are connected properly. the following pins are designated on the p1, input power connector: p1 pin label connection 1 ac2 no connect. do not use. 2 vdd test point for ic pin vdd. 3 ac1 connect to ac adapter power ( 5.25v +/- 0.75v) 4 usb1 connect to usb power (5v +/- 0.5v) 5 usb2 test point for ic pin vin. 6 gnd connect to common ground. table 4 ? p1 pins either ac1 or usb1 or both may be applied. the oring circuit will select ac1 if both ac1 and usb1 are applied at the same time. j umpers the lx2201 evaluation board has five (5) jumpers. these jumpers have two (2) possible positions and are designed to always be installed in one position or the other. the functi on of the jumpers is as follows: jumper position connection lo disable discharge mode. vid0 hi enable discharge mode. lo usb low current mode. (charger disable when vid0 = 0) vid1 hi usb high current mode. lo 4.1v battery terminal voltage vm hi 4.2v battery terminal voltage in 1 enables the headroom regulation circuit. con3 out disables the headroom regulation circuit. vdd input logic pulled up to vdd. con7 vbat 2 input logic pulled up to vbat. table 5 ? jumper configuration 1 the headroom enable circuit prevents disable switch chatter if the input power is current limited (weak) sour ce. this jumper is normally in. 2 the logic is normally referenced to vbat, but can be referenced to vdd in some cases. this jumper is normally vbat
lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 7 copyright ? 2002 rev. 1.2, 2004-06-25 h ookup the following is a demonstration scenario that can be used to evaluate the lx2201, using the lx2201 evaluation board. directions for hook up (ac adapter only mode): 1. place jumpers vid0 and vid1 in the lo position. place the logic pullup jumper in the vbat position. place the vm jumper in the 4.1 or 4.2v position depending on the battery chemistry. 2. connect a 1ah or greater single cell lithium ion battery to the battery output terminal. 3. if desired, apply a 10 ohm resistor across the discharge load connector terminals. 4. apply a 5.25v power supply (>2a) to the p1 ac1 input. 5. to begin charging, change vid0 from lo to hi. 6. remove and reapply the ac1 power source and observe the battery switch from charge to discharge mode. 7. to prevent battery discharge mode change vid1 from lo to hi and vid0 from hi to lo. 8. the headroom ckt jumper should be installed in the in position if a power supply less than 4.5v is applied to ac1. 9. other configurations are shown in the lx2201 specification and can be demonstrated by applying the inputs to the appropriate pins on connector p1: usb only ? apply power input to usb1. ac adapter and usb ? apply ac adapter to ac1 and usb power to usb1. battery output cus ccp p1 c3 d3 lx2201 hi integrated products c1 + r7 lo r8 ctp d2 q2 d5 r9 r10 d4 gnd ac1 vdd ac2 - usb2 usb1 hi lo vid1 vid0 4.1v 4.2v vm integrated products lx2201 usb li-ion battery charger con7 vdd vbat in out q5 r11 r15 c4 - + vdd logic pullup vin vbat d i s c h a r g e l o a d r12 r13 r14 con3 headroom regulation ckt 10 + - 5.25v ac adapter + - 5.0v usb power + - figure 3 ? lx2201 evaluation board hook up
lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 8 copyright ? 2002 rev. 1.2, 2004-06-25 lx2201 e valuation b oard p rinted c ircuit b oard l ayout battery output cus ccp p1 c3 d3 lx2201 hi integrated products c1 + r7 lo r8 ctp d2 q2 d5 r9 r10 d4 gnd ac1 vdd ac2 - usb2 usb1 hi lo vid1 vid0 4.1v 4.2v vm integrated products lx2201 usb li-ion battery charger con7 vdd vbat in out q5 r11 r15 c4 - + vdd logic pullup vin vbat d i s c h a r g e l o a d r12 r13 r14 con3 headroom regulation ckt figure 4 ? lx2201 evaluation board
lx2201 e val l i -i on b attery c harger p roduct d esign g uide microsemi integrated products 11861 western avenue, garden grove, ca. 92841, 714-898-8121, fax: 714-893-2570 page 9 copyright ? 2002 rev. 1.2, 2004-06-25 lx2201 e valuation b oard b ill of m aterials miscellaneous components line item part description manufacturer & part # case reference designators qty 1 usb battery charger m icrosemi lx2201 mlp u1 1 2 diode, schottky, 20v, 2a microsemi b220a-13 d2 1 3 diode, schottky, 20v, 1a microsemi ups5817 powermite d3, d4 2 4 diode, led green microsemi upgled 0603 d5 1 5 p mosfet 5.6a intl rectifier irlms6802 tsop-6 q2 1 6 pnp dual matched diodes inc dmmt3906w sot-363 q5 1 7 3 pin header, .100 5 8 jumpers 5 9 6 pin header, .100 1 10 terminal lug 2 capacitors line item part description part description case reference designators qty 1 capacitor, 10f, 16v, x7r murata grm32dr71c106ma01l 1210 c1, c3 2 2 capacitor, 0.1f, 16v, x7r murata grm219r71c104ka01d 0805 c4, c5 2 resistors line item part description part description case reference designators qty 1 resistor, 470 ohm panasonic era-6yeb471v 0805 r7 1 2 resistor, 47k panasonic era-6yeb473v 0805 r8, r9, r10 3 3 resistor, 499k panasonic erj-6enf4993v 0805 r11, r14, r15 3 4 resistor, 100k panasonic erj-6enf1003v 0805 r12 1 5 resistor, 576k panasonic erj-6enf5763v 0805 r13 1 6 resistor, 75k panasonic erj-6enf7502v 0805 rccp 1 7 resistor, 2.49k panasonic erj-6enf2491v 0805 rcus 1 8 resistor, 150k panasonic erj-6enf1503v 0805 rctp 1
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