apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 introduction this easy-to-use kit provides a platform for the evaluation of pwm ampli?ers using the sa03 pin-out con?guration. it can be used to analyze a multitude of standard or proprietary circuit con?gurations, and is ?exible enough to do most standard ampli?er test con?gurations. the board is designed for surface mounting all components except the switching ampli?er. the schematic is shown in figure 2. note that all of the components shown on the schematic will probably not be used for any single circuit. some components will simply be omitted, while others require installation of a jumper to complete the signal path. only components unique to the EK03 are provided in this kit. hardware similar to that shown in ?gure 1 must be obtained locally. parts list part # description quantity hs18 heatsink 1 ms04 pc mount cage jacks 1 bag/12 each eval09 pc board 1 60spg00001 spacer grommets 4 tw05 thermal washer 1 box/10 each assembly 1. from the non-silk screen side, insert and solder cage jacks. be sure each one is fully seated. 2. from the non-silk screen side, push spacer grommets into pc board until fully seated. grommets will snug when screws are inserted for heatsink mounting. 3. apply tw05 thermal washer to the bottom of the ampli?er. 4. use #14 sleeving to insulate and align at least 2 opposite pins of the ampli?er. 5. mount ampli?er to heatsink using #6 screws and nuts. torque the part to the speci?ed 8 to 10 in-lbs (.9 to 1.13 n*m). do not over torque. 6. install components as needed. external connections may be soldered directly or standard banana jacks may be soldered to these pads. 7. insert ampli?er pins into cage jacks and fasten board to heatsink. ox7r105kwn 1f cap 1825b105k201n, 6 novacap before you get started * all apex ampli? ers should be handled using proper esd precautions. * always use the heatsink included in this kit with tw05 washer. * always use adequate power supply bypassing. * do not change connections while the circuit is powered. * initially set all power supplies to the minimum operating levels allowed in the device data sheet. * check for oscillations. ???????? ??????????????????? ????????????????????? ???????????????????????????????? ?????????????? ???????????????????? ??????????????????? ?????????????????????????? ????????? ?????????????????? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??????????????????????????????? ???? figure 1.
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 2 EK03 evaluation kit for sa03 pin-out figure 2. pcb schematic. a block diagram of the ampli?er is shown in figure 2 along with pcb connections of all the commonly used external components. your application circuit will not use all of the components. add those components required by your circuit. you may have to jumper some components to make the desired electrical connections. j1 is an optional way to connect the clock circuit. power supply bypassing is particularly important and that is why high quality ceramic chip capacitors are supplied with the kit. in addition you may need to add a 10-50 uf or larger capacitor on the +vs pin. this additional capacitor needs to be rated for switching operation. note that the signal ground and power ground are separated and tie together only at the ground pin (5). a breadboarding area is supplied which can accomodate 1 or 2 ic ampli?ers and associated components. the large terminal pads can be used to solder wire connec - tions or banana jacks. ???? ? ? ? ?? ??????????????????????????????????
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 3 EK03 evaluation kit for sa03 pin-out figure 3. functional test circuit the schematic of figure 3 can be used to verify the functionality of your ampli?er and help you gain a familiarity with proper operation. at either a out or b out, with respect to ground, you should observe a square wave approximately 30 v in amplitude with a ?xed frequency and duty cycle that varies from ap - proximately 0 to 100% at a rate of 1 hz. the current limit is set to 2 amps. ????
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 EK03 figure 4. pcb ? ?? ? ???? ???? ???? ???? ????? ?????? ????? ???? ??? ??? ?? ??? ??? ??? ??? ??? ????????? ????????? ???? ??? ?? ?? ?? ????? ????? ???? ??? ??? ????? ??? ??? ?? ?? ????? ?? ?? ?? ?? ? ??? ????? ????? ???????? ??????????? evaluation kit for sa03 pin-out this data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. all speci?cations are subject to change without notice. EK03u rev f january 2005 ? 2005 apex microtechnology corp.
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