apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 1 ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??????????????????????????? ????? features ? low cost ? high voltage - 200 volts ? high output current - 20 amps ? 170 watt dissipation capability applications ? motor drive ? magnetic deflection ? programmable power supplies ? industrial audio amplifier description the mp240 operational ampli?er is a surface mount con - structed component that provides a cost effective solution in many industrial applications. the mp240 offers outstanding performance that rivals much more expensive hybrid compo - nents yet has a footprint of only 4.7 sq in. the mp240 has many optional features such as four-wire current limit sensing, a shut - down control and external compensation. in addition, the class a/b output stage biasing can be turned off for lower quiescent current with class c operation in applications where crossover distortion is less important such as when driving motors, for example. a boost voltage feature biases the output stage for close linear swings to the supply rail for extra ef?cient operation. the mp240 is built on a thermally conductive but electrically insulating substrate that can be mounted to a heat sink. equivalent circuit diagram 42-pin dip package type fc typical application motor position control the mosfet output stage of the mp240 provides superior soa performance compared to bipolar output stages where secondary breakdown is a concern. the extended soa is ideal in motor drive applications where the back emf of the motor may impose simultaneously both high voltage and high current across the output stage transistors. in the ?gure above a mechanical to electrical feedback position converter allows the mp240 to drive the motor in either direction to a set point determined by the dac voltage. external connections ?? ?? ?? ??? ?? ?? ??? ??? ???? ???? ?? ??? ?? ??? ??? ??? ??? ??? ??? ??? ??? ?? ?? ?? ?? ??? ??? ??? ?? ??? ??? ?? ?? ?? ?? ?? ??? ??? ? ? ? ?? ?? ?? ?? ??? ? ??? ?? ??? ?? ?? ??? ?? ?? ?? ??? ?? ??? ??? ??? ??? ????? ???? ????? ????? ????? ????? ???? ??? ??? ??? ??? ??? ??? ? ? ??? ??? ?? ? ??? ???? ???? ??? ??? ????? ??? ????? ??? ????? ??? ????? ??? ??? ??? ??? ??? ??? ??? ??? ? ? ? ? ? ? ? ? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??? ??? ??? ?? ??? ?? ??? ?? ??? ?? ?????? ? ? ?????????????????????????????????????????????? ? ?????? ? ? ??????????????????????????????????????????????????????? ???????????????????????????????????????????????????? ?????????????????????????????????????? ??????????????????????????????????????????????? ???????????????????????? ?????????????????? ?????????????? ? ? ? ? ????? ????? ? ? ????? ??? ? ?? ?? ?? ? ?? ? ??? ? ?? ?? ?? ?? ?? ?? ?? ??? ??? ??? ??? ??? ??? ??? ??? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ?? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ??? ?????? ?? ?? ?? ??? ??? ???????? ???????????? ?????????????? ? ? ????? ????? ? ? ?????? ??? ?? ??? ??? ??? ??? ?? ?? ?? ??? ??? ? ??? ?? ? ?????????? ???????? ??????? ? ????? ????? ?? ?? ??? ??? ??? ??? ??? ??? ??? ??? ????? ????? ? ???????? ???????? ?? ??? ?? ??? ? ??? ?? ? ??? ???? ????? ????? ????? ? ????? ????? ??? ??? ??? ???
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 2 absolute maximum ratings specifications mp240 specifications absolute maximum ratings parameter test conditions 1 min typ max units input offset voltage 1 5 mv offset voltage vs. temperature full temperature range 20 50 v/c offset voltage vs. supply 20 v/v bias current, initial 3 100 pa bias current vs. supply 0.1 pa/v offset current, initial 50 pa input impedance, dc 100 g? input capacitance 4 pf common mode voltage range +v b - 15 v common mode voltage range -v b + 15 v common mode rejection, dc 92 db differential input voltage 25 v noise 1mhz bandwidth, 1k? r s 5 v rms shutdown, active hsd - lsd 4.5 5 5.5 v shutdown, inactive hsd - lsd -0.5 0 0.25 v gain open loop @ 15hz r l = 1k?, c c = 100pf 96 db gain bandwidth product @ 1mhz c c = 100pf 1.8 mhz phase margin full temperature range 60 output voltage swing i o = 20a +v s - 10 +v s - 7 v voltage swing i o = -20a -v s + 10 -v s + 8 v voltage swing i o = 20a, +v b = +v s +10v +v s - 3.0 +v s - 2.0 v voltage swing i o = -20a, -v b = -v s -10v -v s + 6.0 -v s + 5.0 v current, continuous, dc 20 a slew rate, a v = -10 c c = 100pf 12 14 v/s settling time, to 0.1% a v = -1, 10v step, c c = 680pf 5 s resistance, open loop dc, 10a load 0.2 ? power supply voltage 15 75 100 v current, quiescent, total 16.5 25 ma current, shutdown or class c quiescent 8.5 ma current, boost supply 8.5 ma thermal resistance, ac, junction to case 5 full temperature range, f 60hz 0.58 c/w resistance, dc, junction to case full temperature range, f < 60hz 0.73 c/w resistance, junction to air full temperature range 14 c/w temperature range, case -40 85 c notes: 1. unless otherwise noted: t c = 25c, compensation c c = 680pf, dc input speci?cations are value given, power supply voltage is typical rating. ampli?er operated without boost feature. 2. long term operation at the maximum junction temperature will result in reduced product life. derate internal power dissipation to achieve high mtbf. 3. doubles for every 10c of case temperature increase. 4. +v s and -v s denote the + and - output stage supply voltages. +v b and -v b denote the + and - input stage supply voltages (boost voltages). 5. rating applies if the output current alternates between both output transistors at a rate faster than 60hz. 6. power supply voltages +v b and -v b must not be less than +v s and -v s respectively. supply voltage, +v s to -v s 200v supply voltage, +v b +v s + 15v 6 supply voltage, -v b -v s - 15v 6 output current, peak 25a, within soa power dissipation, internal, dc 170w input voltage +v b to -v b temperature, pin solder, 10s 225c. temperature, junction 2 150c. temperature range, storage -40 to 105c. operating temperature, case -40 to 85c.
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 3 typical performance graphs mp240 ????????? ? ?? ?? ?? ?? ??? ??? ?? ??? ?? ??? ???? ?? ?? ?????????????????????? ????? ? ???????? ????? ? ???????? ????? ? ???????? ? ? ?????? ? ? ? ? ?????????????????????????????? ??????????????????????????????? ???????????????? ? ?? ?? ?? ?? ??? ??? ?? ??? ?? ??? ???? ?? ?? ?????????????????????? ? ? ? ????? ? ???????? ????? ? ???????? ????? ? ???????? ? ? ?????? ? ????????????????? ? ????????????????? ? ?????????????????? ? ?????????????????? ? ? ? ?? ?? ?? ? ? ? ? ????????????????? ? ???? ????????????????????????????? ???????????????????? ? ? ????? ? ? ?????????? ? ? ? ? ??? ??? ? ?? ?? ?? ?? ??? ? ?? ??? ??? ?????????????? ??????????????????? ? ????? ????????????????????????????????? ??? ??? ? ?? ?? ?? ??? ?? ?? ?? ??? ??? ??? ??? ??????????????????? ? ????? ????????????????????????????? ????????????? ??? ??? ? ?? ?? ?? ?? ??? ?? ??? ??? ??? ??? ???????????????????????????????? ?????????????????????? ??????????????????????????????? ? ???? ?? ??? ?? ??? ??? ????????????????? ??????????????????? ??????????????????? ? ? ????? ? ? ???????? ???? ? ?????? ? ? ????? ? ? ????? ? ? ?????? ? ? ??????? ????? ???? ??? ? ?? ??????????????? ???????????????? ????????????? ????????????? ???????????????????????? ?????????? ? ? ???????????????? ???? ?? ?? ??? ??? ??? ?? ? ? ???????? ? ? ???????? ? ? ?????? ? ? ? ???????? ??? ?????????????????????? ?????????? ? ? ???????????????? ???? ?? ?? ??? ??? ??? ?? ? ? ???????? ? ? ???????? ? ? ???????? ? ? ??????? ??? ?????????????? ????????????????? ? ?? ??? ? ?? ??? ???????????????? ?? ???? ???? ? ? ???????? ? ? ???????? ? ? ???????? ??? ??? ? ? ??????? ? ? ???????? ? ? ??????? ??????????????????????? ? ???? ??????????????????????????????? ? ???? ??????????????????????????? ?? ?? ??? ??? ??? ? ?? ?? ??? ??? ??? ??????????????????? ???????????????????????????????? ? ???? ? ???? ?????????????????????? ? ?????? ? ???? ? ?? ??? ??? ?? ?? ? ??? ??? ?
apex microtechnology corporation ? 5980 north shannon road ? tucson, arizona 85741 ? usa ? applications hotline: 1 (800) 546-2739 4 operating considerations mp240 general please read application note 1 general operating consid - erations which covers stability, power 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. ground pins the mp240 has two ground pins (pins 2, 40). these pins provide a return for the internal capacitive bypassing of the small signal stages of the mp240. the two ground pins are not connected together on the substrate. both of these pins are required to be connected to the system signal ground. balancing resistor selection (r s1 -r s4 ) the mp240 uses parallel sets of output transistors. to ensure that the load current is evenly shared among the transistors external balancing resistors r s1 -r s4 are required. to calculate the required value for each of the resistors use: r = 4.5/i 2 ,where i is the maximum expected output current. for example, with a maximum output current of 10a each balancing resistor should be 0.045 ohms. each resistor dissipates 1.125w at the maximum current. use a non-inductive 2w rated resistor. a ready source for such resistors is the irc resistor series lr available from mouser electronics. safe operating area the mosfet output stage of the mp240 is not limited by second breakdown considerations as in bipolar output stages. only thermal considerations and current handling capabilities limit the soa (see safe operating area graph on previous page). the output stage is protected against transient ?yback by the parasitic diodes of the output stage mosfet structure. however, for protection against sustained high energy ?yback external fast-recovery diodes must be used. compensation the external compensation capacitor c c is connected to pins 4 and 6. unity gain stability can be achieved with c c = 680pf for a minimum phase margin of 60 degrees. at higher gains more phase shift can usually be tolerated and c c can be reduced resulting in higher bandwidth and slew rate. use the typical operating curves as a guide to select c c . a 200v npo (cog) type capacitor is required. boost operation requires more compensation or higher gains than with normal operation due to the increased capacitance of the output transistors when the output signal swings close to the supply rails. overvoltage protection although the mp240 can withstand differential input voltages up to 25v, in some applications additional external protection may be needed. 1n4148 signal diodes connected anti-parallel across the input pins is usually suf?cient. in more demanding applications where bias current is important diode connected jfets such as 2n4416 will be required. see q1 and q2 in figure 1. in either case the differential input voltage will be clamped to 0.7v. this is suf?cient overdrive to produce the maximum power bandwidth. some applications will also need over-voltage protection devices connected to the power supply rails. unidirectional zener diode transient suppressors are recommended. the zeners clamp transients to voltages within the power supply rating and also clamp power supply reversals to ground. whether the zeners are used or not the system power supply should be evaluated for transient performance including power-on overshoot and power-off polarity reversals as well as line regulation. see z1 and z2 in figure 1. power supply bypassing bypass capacitors to power supply terminals +v s and -v s must be connected physically close to the pins to prevent local parasitic oscillation in the output stage of the mp240. use electrolytic capacitors at least 10f per output amp required. bypass the electrolytic capacitors with high quality ceramic capacitors 0.1f or greater. in most applications power supply terminals +v b and -v b will be connected to +v s and -v s respectively. although +v b and -v b are bypassed internally it is recommended to bypass +v b and -v b with 0.1f externally. additionally ground pins 2 and 40 must be connected to the system signal ground. current limit the two current limit sense lines are to be connected directly across the current limit sense resistor. for the current limit to work correctly pin 36 must be connected to the ampli?er output side and pin 35 connected to the load side of the current limit resistor r lim as shown in figure 2. this connection will bypass ?? ?? ??? ??? ??? ?? ? ? ?? ??? ??? ??? ??? ??? ??? ?? ?? ??? ??? ?? ?? ???????????????????????????????? ?? ??? ?? ?? ??? ?? ??? ?? ?? ? ? ? ??? ? ? ?? ? ? ? ?? ??????????????????????????????
apex microtechnology corporation ? telephone (520) 690-8600 ? fax (520) 888-3329 ? orders (520) 690-8601 ? email prodlit@apexmicrotech.com 5 any parasitic resistances r p , formed by socket and solder joints as well as internal ampli?er losses. the current limiting resistor may not be placed anywhere in the output circuit except where shown in figure 2. the value of the current limit resistor can be calculated as follows: r lim = .65/i limit boost operation with the boost feature the small signal stages of the ampli?er are operated at a higher supply voltages than the ampli?ers high current output stage. +v b (pin 1) and -v b (pin 38) are con - nected to the small signal stages. an additional 10v on the +v b and -v b pin is suf?cient to allow the small signal stages to drive the output stage into the triode region and improve the output voltage swing for extra ef?cient operation when required. when the boost feature is not needed +v s and -v s are connected to +v b and -v b respectively. +v b and -v b must not be operated at supply voltages less than +v s and -v s respectively. shutdown the output stage is turned off by applying a 5v level to hsd (pin 8) relative to lsd (pin 7). this is a non-latching circuit. as long as hsd remains high relative to lsd the output stage will be turned off. lsd will normally be tied to signal ground but lsd may ?oat from -v b to +v b - 10v. shutdown can be used to lower quiescent current for standby operation or as part of a load protection circuit. bias class option normally pin 5 (iq) is left open. but when pin 5 is connected to pin 6 (cc1) the quiescent current in the output stage is dis - abled. this results in lower quiescent power, but also class c operation of the output stage and the resulting crossover distortion. in many applications, such as driving motors, the distortion may be unimportant and lower standby power dis - sipation is an advantage. operating considerations mp240 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. mp240u rev f january 2006 ? 2006 apex microtechnology corp.
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