apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 features ? high internal dissipation 400 watts ? high current 40a continuous, 100a peak ? high slew rate 50v/s ? optional boost voltage inputs applications ? semi-conductor testing description the PA50 is a mosfet power operational ampli?er that extends the performance limits of power ampli?ers in slew rate and power bandwidth, while maintaining high current and power dissipation ratings. boost voltage inputs allow the small signal portion of the ampli?er to operate at a higher voltage than the high current output stage. the ampli?er is then biased to achieve close linear swings to the supply rails at high currents for extra ef - ?cient operation. equivalent schematic the jedec mo-127 12-pin power dip? package (see package outlines) is hermetically sealed and isolated from the internal circuits. the use of compressible thermal washers and/or improper mounting torque will void the product warranty. please see general operating considerations. external connections ??? ???? ? ? ? ? ? ? ?? ?? ?? ? ? ? ??? ???? ??? ??? ???? ???? ?? ? ?? ? ???? ???? ?? ? ?? ? ?? ? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ???????????????????????????? ???????????? 12-pin dip package style cr
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 2 PA50 PA50a parameter test conditions 1 min typ max min typ max units input offset voltage, initial 5 10 2 5 mv offset voltage, vs. temperature full temperature range 20 50 * * v/v offset voltage, vs. supply 10 30 * * v/v bias current, initial 10 50 * * pa bias current vs. supply .01 * pa/v offset current, initial 10 50 * * pa input impedance, dc 10" * imput capacitance 13 * pf common mode voltage range full temperature range -v b +12 +v b -14 * v common mode rejection,dc full temp, range, v cm = 20v 90 100 * * db input noise 100khz bw, rs=1k 10 * vrms gain open loop,@ 15hz full temperature range 94 102 * * db gain bandwidth product r l =10 3 * mhz power bandwidth r l =4, v o =80v p-p , av=-10 200 * khz full temperature range output voltage swing i o =40a v s 9.5 v s 8.0 * * v voltage swing, PA50 v boost =v s 10v, i o =40a v s 5.8 v s 4.0 v voltage swing, PA50a v boost =v s 10v, i o =50a v s 5.8 v s 5.0 v current, peak 3ms 10% duty cycle 100 * a settling time to.1% a v = -10,10v step,r l =4 1 * s slew rate a v =-10 50 * v/s resistance i o =0, no load, 2mhz 2.5 * power supply voltage, v boost full temperature range +14, -12 15 65 * * * v voltage, v s full temperature range 3 50 * * v current,quiescent, boost supply 26 32 * * ma current, quiescent, total 30 36 * * ma thermal resistance,ac,junction to case 3 full temperature range, f>60hz .2 .25 * * c/w resistance,dc,junction to case full temperature range, f>60hz .25 .31 * * c/w resistance, junction to air full temperature range 12 * c/w temperature range, case meets full range speci?cation -25 85 * * c absolute maximum ratings specifications absolute maximum ratings supply voltage, +v s to Cv s 100v boost voltage, +v b to -v b 130v output current, within soa 100a power dissipation, internal 400w input voltage, differential 20v input voltage, common mode v b temperature, pin solder - 10s 300c temperature, junction 2 150c temperature, storage C65 to +150c operating temperature range, case C55 to +125c PA50 ? PA50a specifications notes: * the speci?cation of PA50a is identical to the speci? cation for PA50 in applicable column to the left 1. unless otherwise noted: t c = 25c, dc input speci?cations are value given. power supply voltage is typical rating. v boost = v s . 2. long term operation at the maximum junction temperature will result in reduced product life. derate internal power dissipation to achieve high mttf. for guidance, refer to the heatsink data sheet. 3. rating applies if the output current alternates between both output transistors at a rate faster than 60 hz. the PA50 is constructed from mosfet transistors. esd handling procedures must be observed. the internal substrate contains beryllia (beo). do not break the seal. if accidentally broken, do not crush, machine, or subject to temperatures in excess of 850c to avoid generating toxic fumes. caution
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 3 typical performance graphs PA50 ? PA50a ? ?? ?? ?? ??? ??????????????????? ? ??? ??? ??? ?????????????? ???????????????????????????????? ??? ?? ??? ???????????????? ? ?????????????????????? ??? ???? ?? ??? ??? ?? ?? ?? ?? ??? ?? ? ????? ? ???????????????????????????????? ????? ? ?? ?? ??? ?????????????????? ? ??? ????????????????? ??????????????????????????????? ?? ?? ????????????????? ?????????????????? ? ?? ?? ?? ?? ? ??????????????????????????? ? ???? ? ???? ???????????????????? ?? ? ??? ?? ??? ???? ?? ?????????????????????? ??? ??? ? ?? ?? ??? ???? ?? ???? ???? ??? ??? ? ? ? ? ? ?? ????????????????? ? ???? ? ? ????? ? ? ????? ? ????? ???? ? ? ????? ???? ? ?????? ????????????????? ? ????????????????????? ??????????????????????????????? ?? ?? ??? ?? ??? ?? ??? ???? ?? ?? ?? ?? ??? ??????????????????????? ? ???? ??????????????????????????????? ? ???? ?? ????????????????? ???? ?? ?? ?? ? ????? ???? ????? ????????????????? ????? ??? ?? ?? ?? ??? ?????????????? ????????????????? ? ??? ??? ? ?? ?? ?? ?? ?? ??? ? ?????????????????????????????????? ?? ??? ?? ??? ??????????????????? ??????????????????? ? ????? ? ???????? ????? ? ??????? ????? ? ??????? ???????? ???????
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 operating considerations PA50 ? PA50a general please read application note 1 "general operating con - siderations" which covers stability, supplies, heat sinking, mounting, current limit, soa interpretation, and speci?cation interpretation. visit www.apexmicrotech.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selection; apexs complete application notes library; technical seminar workbook; and evaluation kits. current limit there is no internal circuit provision for current limit in the PA50. however, the PA50 circuit board in the PA50 evaluation kit does provide a means whereby the output current can be sensed. an external circuit current limit can thereby be imple - mented if needed. see ek27 data sheet for more details. boost operation with the v boost feature the small signal stages of the ampli?er are operated at higher supply voltages than the ampli?ers high current output stage. +v boost (pin 11) and Cv boost (pin 12) are connected to the small signal circuitry of the ampli?er. +v s (pin 9,10) and Cv s (pin 3,4) are connected to the high current output stage. an additional 10v on the v boost pins is suf?cient to allow the small signal stages to drive the output transistors into saturation and improve the output voltage swing for extra ef?cient operation when required. when close swings to the supply rails is not required the +v boost and +v s pins must be strapped together as well as the Cv boost and Cv s pins. the boost voltage pins must not be at a voltage lower than the v s pins. 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. PA50u rev d january 2005 ? 2005 apex microtechnology corp. compensation compensation is internally ?xed for a gain of 3 or more and is not adjustable by the user. the PA50 therefore is not unity gain stable. power supply bypassing proper and suf?cient power supply bypassing is crucial to proper operation of the PA50. bypass the +vb and -vb supply pins with a minimum .1f ceramic capacitors directly at the supply pins. on the +vs and -vs pins use a combination of ceramic and electrolytic capacitors. use 1f ceramic capaci - tors and an electrolytic capacitor at least 10f for each amp of output current required.
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