apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 features ? low thermal resistance 1.1c/w ? current foldover protection ? excellent linearity class a/b output ? wide supply range 10v to 45v ? high output current up to 15a peak applications ? motor, valve and actuator control ? magnetic deflection circuits up to 10a ? power transducers up to 100khz ? temperature control up to 360w ? programmable power supplies up to 90v ? audio amplifiers up to 120w rms description the pa13 is a state of the art high voltage, very high output current operational ampli?er designed to drive resis - tive, inductive and capacitive loads. for optimum linearity, especially at low levels, the output stage is biased for class a/b operation using a thermistor compensated base-emitter voltage multiplier circuit. the safe operating area (soa) can be observed for all operating conditions by selection of user programmable current limiting resistors. for continuous opera - tion under load, a heatsink of proper rating is recommended. the pa13 is not recommended for gains below C3 (inverting) or +4 (non-inverting). this hybrid integrated circuit utilizes thick ?lm (cermet) resis - tors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. ultrasoni - cally bonded aluminum wires provide reliable interconnections at all operating temperatures. the 12-pin power sip package is electrically isolated. typical application power rating not all vendors use the same method to rate the power han - dling capability of a power op amp. apex rates the internal dissipation, which is consistent with rating methods used by transistor manufacturers and gives conservative results. rating delivered power is highly application dependent and therefore can be misleading. for example, the 135w internal dissipation rating of the pa13 could be expressed as an output rating of 260w for audio (sine wave) or as 440w if using a single ended dc load. please note that all vendors rate maximum power using an in?nite heatsink. thermal stability apex has eliminated the tendency of class a/b output stages toward thermal runaway and thus has vastly increased ampli?er reliability. this feature, not found in most other power op amps, was pioneered by apex in 1981 using thermistors which assure a negative temperature coef?cient in the quies - cent current. the reliability bene?ts of this added circuitry far outweigh the slight increase in component count. external connections ???? ?? ? ???? ??? ???????????? ???? ???? ???? ???? ???? ???? ? ?? ? ??? ? ???? ???? ??? ? ?? ????? ? ? ??? ? ? ??? ????? ?? ????? ? ? ??? ? ? ???????????????????????????????? ??? ???? ? ??? ??? ???? equivalent schematic ? ? ? ? ? ? ? ? ? ?? ?? ?? ??? ??? ?????? ???? ?? ?? ?? ? ?? ? ?? ?? ?? ?? ? ? ?? ? ? ? ? ? ? ?? ?? ?? ?? ?? ?? ?? ??? ??? ??? ??? ? ?? ?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ???????????????????????????? ???????????? 12-pin sip package style dp formed leads avaliable see package styles ed & ee
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 2 absolute maximum ratings specifications specifications absolute maximum ratings pa13 PA13A parameter test conditions 2, 5 min typ max min typ max units input offset voltage, initial t c = 25c 2 6 1 4 mv offset voltage, vs. temperature full temperature range 10 65 * 40 v/c offset voltage, vs. supply t c = 25c 30 200 * * v/v offset voltage, vs. power t c = 25c 20 * v/w bias current, initial t c = 25c 12 30 10 20 na bias current, vs. temperature full temperature range 50 500 * * pa/c bias current, vs. supply t c = 25c 10 * pa/v offset current, initial t c = 25c 12 30 5 10 na offset current, vs. temperature full temperature range 50 * pa/c input impedance, dc t c = 25c 200 * m input capacitance t c = 25c 3 * pf common mode voltage range 3 full temperature range v s C5 v s C3 * * v common mode rejection, dc full temp. range, v cm = v s C6v 74 100 * * db gain open loop gain at 10hz t c = 25c, 1k load 110 * db open loop gain at 10hz full temp. range, 8 load 96 108 * * db gain bandwidth product @ 1mhz t c = 25c, 8 load 4 * mhz power bandwidth t c = 25c, 8 load 13 20 * * khz phase margin , a v = +4 full temp. range, 8 load 20 * output voltage swing 3 t c = 25c, pa13 = 10a, PA13A = 15a v s C6 * v voltage swing 3 t c = 25c, i o = 5a v s C5 * v voltage swing 3 full temp. range, i o = 80ma v s C5 * v current, peak t c = 25c 10 15 a settling time to .1% t c = 25c, 2v step 2 * s slew rate t c = 25c 2.5 4 * * v/s capacitive load full temperature range, a v = 4 1.5 * nf capacitive load full temperature range, a v > 10 soa * power supply voltage full temperature range 10 40 45 * * * v current, quiescent t c = 25c 25 50 * * ma thermal resistance, ac, junction to case 4 t c = C55 to +125c, f > 60hz .6 .7 * * c/w resistance, dc, junction to case t c = C55 to +125c .9 1.1 * * c/w resistance, dc, junction to air t c = C55 to +125c 30 * c/w temperature range, case meets full range speci?cation C25 +85 * * c pa13 notes: * the speci?cation of PA13A is identical to the speci? cation for pa13 in the applicable column to the left 1. long term operation at the maximum junction temperature will result in reduced product life. derate internal power dissipation to achieve high mttf. 2. the power supply voltage for all tests is 40, unless otherwise noted as a test condition. 3. +v s and Cv s denote the positive and negative supply rail respectively. total v s is measured from +v s to Cv s . 4. rating applies if the output current alternates between both output transistors at a rate faster than 60hz. 5. full temperature range speci? cations are guaranteed but not 100% tested. pa13/PA13A supply voltage, +vs to Cvs 100v output current, within soa 15a power dissipation, internal 135w input voltage, differential v s C3v input voltage, common mode v s temperature, pin solder -10s max. 260c temperature, junction 1 175c temperature range, storage C40 to +85c operating temperature range, case C25 to +85c the exposed substrate contains beryllia (beo). 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 pa13 ??? ? ??? ?? ??? ??? ???????????? ??? ?? ?? ??? ??? ??? ????????????????? ?????????????????????? ? ????????? ? ??? ??? ????????????????? ??? ? ?? ??? ????????????????????? ?????????????????????? ?? ?? ?? ??? ? ??? ??? ??? ???? ???? ??? ? ?????????????? ??? ??? ??? ??? ??? ??? ????????????????? ??? ????????????????? ? ??? ??? ? ??? ?? ?? ??? ????????????????? ???? ?? ? ??????????????????? ??????????????? ??? ?? ? ?? ??? ??????????????????????? ? ???? ?? ?? ??? ????????????????? ????????????? ? ???? ?? ??? ? ?????????????????? ? ???? ???????????????????? ???????????????????????????? ? ??? ????????????????? ? ????????????????????? ??????????????????????????????? ?? ?? ??? ??? ?? ??? ? ???????????? ?????????????? ????????????????? ? ???? ??? ??? ?? ??? ??????????????????? ? ????? ? ???? ????????????? ???????????????? ??? ???? ???? ??? ??? ??? ? ??????????? ?? ?? ?? ?? ?? ??? ?? ?? ?? ??? ?????????????? ??? ?? ?? ?? ?? ?? ??? ? ?? ?? ??? ??? ?? ?? ?? ??? ??? ?? ?? ??? ?? ????????????????? ???????????? ?????????????????????????? ? ???? ??? ???? ?? ?? ?? ?? ??? ? ? ? ? ?? ?? ?? ?? ?? ? ? ? ? ? ??? ??? ?? ?? ?? ?? ?? ?? ??? ??? ??? ??? ??? ??? ???? ??????????????????? ? ????? ???? ???? ?? ?? ?? ??? ??? ? ? ? ?? ?? ? ? ? ? ? ?? ?? ?????????? ?? ???? ?? ?? ?????????? ?? ??? ? ? ? ???? ? ? ?????? ? ? ???? ? ? ??????? ????? ? ????????? ? ????????? ????? ? ????????? ? ???????? ???? ? ????????? ? ???????? ? ?? ???????? ? ???????? ? ? ???????? ? ? ???????? ? ? ????? ? ? ???? ? ? ?????? ? ? ????? ? ? ??????? ? ? ??????? ? ? ??????? ? ? ???????? ?? ? ?? ? ? ?? ?? ?? ?? ??? ??? ??????????????????? ? ????? ? ?? ?? ??? ?????????????? ????????????????????????????????? ?? ??? ??? ?? ??? ????
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 load and short circuits to the supply rail or common if the current limits are set as follows at t c = 25c: short to v s short to v s c, l, or emf load common 45v .43a 3.0a 40v .65a 3.4a 35v 1.0a 3.9a 30v 1.7a 4.5a 25v 2.7a 5.4a 20v 3.4a 6.7a 15v 4.5a 9.0a these simpli?ed limits may be exceeded with further analysis using the operating conditions for a speci?c application. current limiting refer to application note 9, "current limiting", for details of both ?xed and foldover current limit operation. visit the apex web site at www.apexmicrotech.com for a copy of power_design. exe which plots current limits vs. steady state soa. beware that current limit should be thought of as a +/C20% function initially and varies about 2:1 over the range of C55c to 125c. for ?xed current limit, leave pin 4 open and use equations 1 and 2. r cl = 0.65/l cl (1) i cl = 0.65/r cl (2) where: i cl is the current limit in amperes. r cl is the current limit resistor in ohms. for certain applications, foldover current limit adds a slope to the current limit which allows more power to be delivered to the load without violating the soa. for maximum foldover slope, ground pin 4 and use equations 3 and 4. 0.65 + (vo * 0.014) i cl = (3) r cl 0.65 + (vo * 0.014) r cl = (4) i cl where: vo is the output voltage in volts. most designers start with either equation 1 to set r cl for the desired current at 0v out, or with equation 4 to set r cl at the maximum output voltage. equation 3 should then be used to plot the resulting foldover limits on the soa graph. if equa - tion 3 results in a negative current limit, foldover slope must be reduced. this can happen when the output voltage is the opposite polarity of the supply conducting the current. in applications where a reduced foldover slope is desired, this can be achieved by adding a resistor (r fo ) between pin 4 and ground. use equations 4 and 5 with this new resistor in the circuit. vo * 0.14 0.65 + 10.14 + r fo i cl = (5) r cl vo * 0.14 0.65 + 10.14 + r fo r cl = (6) i cl where: r fo is in k ohms. operating considerations pa13 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. safe operating area (soa) the output stage of most power ampli?ers has three distinct limitations: 1. the current handling capability of the transistor geometry and the wire bonds. 2. the second breakdown effect which occurs whenever the simultaneous collector current and collector-emitter voltage exceeds speci?ed limits. 3. the junction temperature of the output transistors. the soa curves combine the effect of all limits for this power op amp. for a given application, the direction and magnitude of the output current should be calculated or measured and checked against the soa curves. this is simple for resistive loads but more complex for reactive and emf generating loads. however, the following guidelines may save extensive analytical efforts. 1. capacitive and dynamic* inductive loads up to the following maximum are safe with the current limits set as speci?ed. capacitive load inductive load v s i lim = 5a i lim = 10a i lim = 5a i lim = 10a 50v 200f 125f 5mh 2.0mh 40v 500f 350f 15mh 3.0mh 35v 2.0mf 850f 50mh 5.0mh 30v 7.0mf 2.5mf 150mh 10mh 25v 25mf 10mf 500mh 20mh 20v 60mf 20mf 1,000mh 30mh 15v 150mf 60mf 2,500mh 50mh *if the inductive load is driven near steady state conditions, allowing the output voltage to drop more than 12.5v below the supply rail with i lim = 10a or 27v below the supply rail with i lim = 5a while the ampli?er is current limiting, the inductor must be capacitively coupled or the current limit must be lowered to meet soa criteria. 2. the ampli?er can handle any emf generating or reactive ? ? ??????? ? ? ??????? ????????? ??????? ??????? ??????? ???????????? ??? ?? ?? ?? ?? ?? ?? ?? ???????????????????????????????????????? ? ???? ? ???? ?? ?? ?? ?? ??? ??? ??? ??? ??? ?????????????????????? ? ?????? ? ???? ???????????????? 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. pa13u rev k november 2003 ? 2003 apex microtechnology corp.
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