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 sa01 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 EK01 are provided in this kit. hardware similar to that shown in ?gure 1 must be obtained lo - cally. the pc board and the foot print of the heatsink measure 3" by 5". parts list part # description quantity hs16 heatsink 1 ms04 pc mount cage jacks 1 bag/12 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 tw10 thermal washer or a thin, even coat of thermal grease to the bottom of the sa01. if grease is from a tube make sure there is no sign separation of solids and liquids. if from a jar, stir it prior to application. 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. 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. eval07 pc board 1 60spg00001 spacer grommets 4 tw10 thermal washer 1 box/10 each before you get started * all apex ampli? ers should be handled using proper esd precautions. * always use the heatsink included in this kit with thermal grease. * torque the part to the speci?ed 8 to 10 in-lbs (.9 to 1.13 n*m) * 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 evaluation kit for sa01 pin-out EK01 typical component functions r1 provides -in bias from the reference voltage. r2 sets dc scaling for external feedback such as tachometers, position sensors or current sensors. r3 with r4 sets dc operating point of +in, with r13 and r15 sets gain of voltage feedback circuit. r4 with r3 sets dc operating point of +in. r5 input scaling of the control signal. r6 with c6 sets the corner frequency of the integrator. r7 with c3 & c4 forms a low pass ? lter for the external feedback loop. often used with tachometers. r8 with c2 forms a low pass ?lter for the current limit circuit. r9 current sense. often is a piece of resistance wire. r10 with r8 divides shutdown signal voltage feeding shdn/filter pin. r11 with c5 sets corner frequency for external feedback loop. r12, 13, 15, 16 provides voltage feedback for a voltage controlled output. r14 helps set gain or scale input voltage levels. r17 with c12 provides low pass ?ltering of +in signal. c1 power supply bypass. c2 with r8 form a low pass ? lter for the current limit circuit, also ? lters the shdn signal. c3, 4 with r7 forms a low pass ? lter for the external feed back loop. often used with tachometers. c5 with r11 sets corner frequency for external feedback loop. c6 with r6 sets the corner frequency of the integrator. c7 power supply bypass, must have very low esr in mhz range. c8 filters reference or feedback voltage at +in. c9 bypass for the reference voltage. c10, 11 with r15 and r16 provides low pass ? ltering of voltage feedback. c12 with r17 provides low pass ?ltering of +in signal. c13 provides ac coupling of +in signal. d1 C d4 optional ?yback diodes. d5 C d7 input protection zener diodes . figure 2. pcb schematic. ?? ??? ?? ? ?? ??? ??? ???? ??? ??? ??? ????? ?????? ? ????? ? ??? ? ??? ???? ? ? ? ? ? ? ? ? ? ?? ?? ? ? ??? ? ??? ??? ?? ??? ??? ??? ?? ?? ??? ?? ??? ??? ?? ?? ?? ?? ?? ??? ?? ?? ?? ?? ?? ?? ?? ??? ?? ?? ?? ???? ??? ????? ???????? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ?? ?? ??? ?? ?? ?? ??? ?? ???
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 3 EK01 evaluation kit for sa01 pin-out figure 3. pcb ?? ?? ?? ?? ?? ? ??? ??? ??? ?? ?? ?? ??? ?? ??? ???? ?? ??? ?? ??? ??? ?? ?? ?? ??? ??? ???? ? ??? ??? ??????????????? ?? ??? ?? ??? ? ?? ??? ??? ??? ?? ?? ??? ?? ?? ??? ??? ??? ???? ?? ?? ??? ???????? ??????????? ???? ???? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? open loop operation ?? ??? ?? ? ?? ??? ??? ???? ??? ??? ??? ????? ?????? ? ????? ? ??? ? ??? ???? ? ? ? ? ? ? ? ? ? ?? ?? ? ? ??? ??? ????????? ? ??? ??? ?? ??? ?? ??? ??? ?? ?? ?? ?? ?? ?? ???? ??? ??? ??? ? ?? ??????????????? ???? ????? ?? ????? ??? ??????? ???? ? ?? ???? ??? ????????? ?? ? ?? ? ? ? ?? ? ? ? ???? ?
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 EK01 common configurations ?? ??? ?? ? ?? ??? ??? ???? ??? ??? ??? ????? ?????? ? ????? ? ??? ? ??? ???? ? ? ? ? ? ? ? ? ? ?? ?? ? ? ??? ? ??? ??? ?? ??? ?? ?? ?? ?? ??? ?? ?? ?? ?? ??? ?? ?? ?? ?? ?? ?? ?? ?? ?? ???? ??? ????? ???????? ??? ??? ??? ??? ? ? ?? ??? ?? ? ?? ??? ??? ???? ??? ??? ??? ????? ?????? ? ????? ? ??? ? ??? ???? ? ? ? ? ? ? ? ? ? ?? ?? ? ? ??? ? ??? ??? ?? ??? ?? ?? ?? ?? ?? ?? ??? ??? ?? ?? ?? ?? ?? ?? ?? ?? ?? ???? ??? ????? ???????? ??? ??? ??? ??? ???? ???? ? position control voltage control speed control ?? ??? ?? ? ?? ??? ??? ???? ??? ??? ??? ????? ?????? ? ????? ? ??? ? ??? ???? ? ? ? ? ? ? ? ? ? ?? ?? ? ? ??? ? ??? ??? ?? ??? ??? ?? ?? ?? ?? ? ? ? ? ? ? ? ? ? ? ?? ??? ?? ?? ?? ?? ??? ?? ?? ?? ???? ??? ??? ??? ??? ? ? ? ? ??????????? ?? ? ? ? ??? ??? ??? ??? 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. EK01u rev e december 2004 ? 2004 apex microtechnology corp.
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