apex microtechnology corporation ?telephone (520) 690-8600 ?fax (520) 888-3329 ?orders (520) 690-8601 ?email prodlit@apexmicrotech.com features low thermal resistance ?1.1 c/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 amplifier designed to drive resistive, in- ductive 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 mul- tiplier circuit. the safe operating area (soa) can be observed for all operating conditions by selection of user program- mable current limiting resistors. for continuous operation under load, a heatsink of proper rating is recommended. this hybrid integrated circuit utilizes thick film (cermet) resistors, ceramic capacitors and semiconductor chips to maximize reliability, minimize size and give top performance. ultrasonically bonded aluminum wires provide reliable inter- connections at all operating temperatures. the 12-pin power sip package is electrically isolated. thermal stability apex has eliminated the tendency of class a/b output stages toward thermal runaway and thus has vastly increased amplifier reliability. this feature, not found in most other power op amps, was pioneered by apex in 1981 using thermistors which assure a negative temperature coefficient in the quies- cent current. the reliability benefits of this added circuitry far outweigh the slight increase in component count. power rating not all vendors use the same method to rate the power handling 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 depen- dent 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 infinite heatsink. typical application ?v = l * 1 t yoke driver: ? ? 47 f.1 f .1 f 47 f ? 22v +73v r 1k r .2 c 50pf 2.5v p-p r 2k 11,12 2 1 5,6 3 r .5 7.8mh 4 5ap-p ? d f cl+ f s high current asymmetrical supply 7,8 9,10 ? r .2 cl ? pa13 equivalent schematic 1 234 56 78 910 11 12 ? in +in output f.o. ? v +v ? c l +c l ? r cl +r cl s s 12 2 1 5 9 3 7 a1 d1 q1 q4 q3 q5 c1 q2a q2b q6b q6a 4 11 10 6 8 http://www.apexmicrotech.com (800) 546-apex (800) 546-2739 microtechnology power operational amplifier pa13 ?PA13A external connections package: sip03
apex microtechnology corporation 5980 north shannon road tucson, arizona 85741 usa applications hotline: 1 (800) 546-2739 absolute maximum ratings specifications specifications absolute maximum ratings parameter test conditions 2, 5 min typ max min typ max units input offset voltage, initial t c = 25 c 2 6 1 3mv offset voltage, vs. temperature full temperature range 10 65 * 40 v/ c offset voltage, vs. supply t c = 25 c 30 200 * * v/v offset voltage, vs. power t c = 25 c 20 * v/w bias current, initial t c = 25 c 12 30 10 20 na bias current, vs. temperature full temperature range 50 500 * * pa/ c bias current, vs. supply t c = 25 c 10 * pa/v offset current, initial t c = 25 c 12 30 5 10 na offset current, vs. temperature full temperature range 50 * pa/ c input impedance, dc t c = 25 c 200 * m ? input capacitance t c = 25 c3*pf common mode voltage range 3 full temperature range v s ? 5 v s ? 3** v common mode rejection, dc full temp. range, v cm = v s ? 6v 74 100 * * db gain open loop gain at 10hz t c = 25 c, 1k ? load 110 * db open loop gain at 10hz full temp. range, 8 ? load 96 108 * * db gain bandwidth product @ 1mhz t c = 25 c, 8 ? load 4 * mhz power bandwidth t c = 25 c, 8 ? load 13 20 * * khz phase margin full temp. range, 8 ? load 20 * output voltage swing 3 t c = 25 c, pa13 = 10a, PA13A = 15a v s ? 6* v voltage swing 3 t c = 25 c, i o = 5a v s ? 5* v voltage swing 3 full temp. range, i o = 80ma v s ? 5* v current, peak t c = 25 c1015a settling time to .1% t c = 25 c, 2v step 2 * s slew rate t c = 25 c 2.5 4 * * v/ s capacitive load full temperature range, a v = 1 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 = 25 c2550**ma thermal resistance, ac, junction to case 4 t c = ? 55 to +125 c, f > 60hz .6 .7 * * c/w resistance, dc, junction to case t c = ? 55 to +125 c .9 1.1 * * c/w resistance, dc, junction to air t c = ? 55 to +125 c30* c/w temperature range, case meets full range specification ? 25 +85 * * c pa13 notes: * the specification of PA13A is identical to the specification 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 dissipatio n 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 ? v s denote the positive and negative supply rail respectively. total v s is measured from +v s to ? v s . 4. rating applies if the output current alternates between both output transistors at a rate faster than 60hz. 5. full temperature range specifications are guaranteed but not 100% tested. pa13/PA13A supply voltage, +vs to ? vs 100v output current, within soa 15a power dissipation, internal 135w input voltage, differential v s ? 3v input voltage, common mode v s temperature, pin solder -10s 300 c temperature, junction 1 175 c temperature range, storage ? 65 to +150 c operating temperature range, case ? 55 to +125 c the exposed substrate contains beryllia (beo). do not crush, machine, or subject to temperatures in excess of 850 c to avoid generating toxic fumes. caution pa13 PA13A
apex microtechnology corporation telephone (520) 690-8600 fax (520) 888-3329 orders (520) 690-8601 email prodlit@apexmicrotech.com typical performance graphs pa13 ? 50 0 100 .7 1.9 2.2 bias current 1.3 .4 10 100 10k .1m frequency, f (hz) input noise voltage, v (nv/ hz) 1 100 10m frequency, f (hz) ? 20 0 60 120 small signal response open loop gain, a (db) 20 40 80 100 1 100 .1m 10m ? 210 ? 150 ? 60 0 phase response ? 90 ? 30 10k 20k 50k .1m frequency, f (hz) 4.6 output voltage, v (v ) o 100 1k 3k .1m frequency, f (hz) .003 .3 3 harmonic distortion distortion, (%) .01 .1 1 40 100 total supply voltage, v s (v) .4 .6 1.6 quiescent current normalized, i q (x) .8 1.4 0 output current, i o (a) output voltage swing voltage drop from supply (v) 1 10k frequency, f (hz) 0 common mode rejection common mode rejection, cmr (db) 40 80 120 .1m 10 100 0 time, t ( s) pulse response output voltage, v (v) ? 50 ? 25 50 100 case temperature, t ( c) 0 15.0 current limit current limit, i (a) lim 12.5 c 300 10k 30k 1 input noise 1k 10 20 30 n 1k ? 25 25 50 75 1.6 power response pp 30k 50 60 70 80 90 1.2 025 75 5.0 7.5 -8 10 1k 10k .1m 1m 10 10k 1m frequency, f (hz) phase, ( ) normalized bias current, i (x) b 2.5 10.0 1k 1m 20 60 100 2 4 6 8 10 12 -6 -4 -2 0 2 4 6 8 o 70k 6.8 10 15 22 32 46 68 100 .03 1.0 125 1.0 125 17.5 case temperature, t ( c) c ? 180 ? 120 40 50 70 100 2.5 3691215 2 3 4 5 6 r cl = .18 , r fo = 0 r cl = .06 ,r fo = v o = 0 v o = 24v v o = 0 v o = ? 24v | +v s | + | ? v s | = 100v | +v s | ? | ? v s | = 80v | +v s | + | ? v s | = 30v v in = 5v, t r = 100ns p o = 100mw t c = ? 25 c p o = 4w a v =10 v s = 37v r l = 4 ? p o = 120w t c = 25 c t c = 85 c t c = 125 c ? v 0 +v 0 ? ? 0 20 40 60 80 100 120 case temperature, t ( c) 0 20 60 100 power derating internal power dissipation, p(w) 40 140 140 80 120 pa13
apex microtechnology corporation 5980 north shannon road tucson, arizona 85741 usa applications hotline: 1 (800) 546-2739 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 simplified limits may be exceeded with further analysis using the operat- ing conditions for a specific application. current limiting refer to application note 9, "current limiting", for details of both fixed 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 +/ ? 20% function initially and varies about 2:1 over the range of ? 55 c to 125 c. for fixed 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 equation 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. 0.65 + vo * 0.14 10.14 + r fo i cl = (5) r cl 0.65 + vo * 0.14 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 consider- ations" which covers stability, supplies, heat sinking, mounting, current limit, soa interpretation, and specification 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; apex ? s complete application notes library; technical seminar workbook; and evaluation kits. safe operating area (soa) the output stage of most power amplifiers 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 specified 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 specified. capacitive load inductive load v s i lim = 5a i lim = 10a i lim = 5a i lim = 10a 50v 200 f 125 f 5mh 2.0mh 40v 500 f 350 f 15mh 3.0mh 35v 2.0mf 850 f 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 amplifier is current limiting, the inductor must be capacitively coupled or the current limit must be lowered to meet soa criteria. 2. the amplifier can handle any emf generating or reactive load and short circuits to the supply rail or common if the current limits are set as follows at t c = 25 c: t=0.5ms t=1ms t=1ms second breakdown tc=25c tc=85c thermal steady state 10 15 20 25 30 35 40 50 60 70 80 90 15 10 8 6 4 3 2 1.5 1 .8 .6 .4 supply to output differential voltage v ? v (v) output current from +v or ? v (a) this data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible i naccuracies or omissions. all specifications are subject to change without notice. pa13u rev. f february 2001 ? 2001 apex microtechnology corp.
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