mp118u 1 mp108, mp108a power operational amplifier mp118 ? MP118A copyright ? apex microtechnology, inc. 2014 (all rights reserved) www.apexanalog.com nov 2014 mp118u rev c features ? high voltage - 200 volts ? high output current ( 10a continuous) ? 100 watt dissipation capability ? 140 khz power bandwidth ? temperature monitor ? integrated shut-down applications ? ink jet printer head drive ? piezo transducer drive ? industrial instrumentation ? reflectometers ? ultra-sound transducer drive description the mp118 is a smt operational amplifer that pro - vides a cost effective solution in many industrial ap - plications. the mp118 offers outstanding performance that rivals much more expensive hybrid components, but yet has a footprint of only 26cm 2 (4 in 2 ). the 140 khz power bandwidth and 10a output of the mp118 makes it a good choice for piezo transducer drive ap - plications. the mp118 is built on a thermally conduc - tive but electrically insulating substrate that can be mounted to a heat sink. mp118 is based on the mp108 design, but offers lower quiescent current consumption and new features for enhanced system protection. the newly introduced over-current protection and temperature monitoring circuitry will shut-down the system before any perma - nent damage occurs. figure 1: equivalent circuit diagram (for illustration purposes only C not accurate representation) +v s -in +in -v s +v b -v b c c 2 c c 1 gnd gnd +i sd -i sd out -v b +v b substrate backplate +v s +v s -v s -v s out out out out out back plate tp temp sd gnd on-board power-on reset gnd +5v reset system control 8 4 3 2 1 5 6 7 9 10 34 33 32 30 25 14 15 16 11 12 13 28 27 20 21 22 17 18 19 mp118 ? MP118A
2 mp118u absolute maximum ratings specifications parameter symbol min max units supply voltage, +v s to -v s 200 v supply voltage, +v b (note 4, 6) +v s +15 v supply voltage, -v b (note 4, 6) -v s -15 v output current, peak, within soa 12 a power dissipation, internal, dc 100 w input voltage +v b to -v b v temperature, pin solder, 10s 225 c temperature, junction (note 2) 150 c temperature, storage -40 +105 c operating temperature range, case -40 +100 c sd , reset signal -0.3 5.5 v mp118 MP118A parameter test conditions (note 1) min typ max min typ max units offset voltage full temp range 1 5 * 3 mv offset voltage, vs. temperature 50 * v/ c offset voltage, vs. supply 20 * v/v bias current, initial (note 3) 100 70 pa bias current, vs. supply 0.1 * pa/v offset current, initial 50 30 pa input resistance, dc 10 11 * 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 noise 20 khz bw, r s = 1k 2 * v rms input mp118 MP118A parameter test conditions (note 1) min typ max min typ max units open loop, 15 hz r l = 10k c c =10pf 96 120 * * db gain bandwidth product @ 1 mhz c c = 10pf 56 * mhz phase margin full temp range, c c =150pf 45 60 * * degrees gain mp118 MP118A parameter test conditions (note 1) min typ max min typ max units voltage 15 75 100 * * * v current, quiescent 25 30 * 27 ma power supply mp118 ? MP118A
mp118u 3 mp118 MP118A parameter test conditions (note 1) min typ max min typ max units voltage swing i o = 10a +v s - 10 +v s - 8.6 * * v voltage swing i o = -10a -v s + 10 -v s + 7 * * v voltage swing i o = 10a, +v b = +v s +10v +v s - 1.6 * v voltage swing i o = -10a, -v b = -v s -10v -v s + 5.1 * v current, continuous, dc 10 11 a slew rate, a v = -20 c c = 10pf 65 * v/s settling time to 0.1% 2v step 0.55 * s resistance no load, dc 5 * ? power bandwidth 180vp-p c c = 10pf, +v s = 100v, -v s = -100v 140 * khz mp118/MP118A parameter test conditions (note 1) min typ max units resistance, ac, junction to case (note 5) full temp range, f60 hz 1 c/w resistance, dc, junction to case full temp range, f<60 hz 1.25 c/w resistance, junction to air full temp range 13 c/w temperature range, case -40 +85 c mp118/MP118A parameter test conditions (note 1) min typ max units temp sensor output voltage, v temp t c = 25c 2.298 v temp sensor gain -13.6 mv/c temperature accuracy t c = -40c to +85c 2.2 c mp118/MP118A parameter test conditions (note 1) min typ max units thermal system shut-down, t sd 100 c thermal shut-down hysteresis 8 c shut-down voltage (+i sd to -i sd ) 0.65v v sd active level (note 8) 0 0.2 v sd active minimum pulse width 1 s reset high level (note 7) 4.5 5.5 v reset low level (note 7) 0 0.2 v notes: * the specifcation of MP118A is identical to the specifcation for the mp118 in the applicable column to the left 1. unless otherwise noted: t c = 25c, c c = 100pf. dc input specifcations are value given. power supply voltage is typical rating. 2. long term operation at the maximum junction temperature will result in reduced product life. derate internal power dissipation to achieve high mttf. 3. doubles for every 10c of case temperature increase. 4. +v s and -v s denote the positive and negative supply voltages to the output stage. +v b and -v b denote the positive and negative supply voltages to the input stages. 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. 7. the reset signal is edge sensitive. a transition from low to high level triggers the mp118 shut-down function. 8. the sd signal needs to be an open drain signal, meaning that it is high impedance when not active low. output thermal temperature sensor system protection mp118 ? MP118A
4 mp118u figure 2: typical performance graphs typical performance graphs 200 160 120 80 40 0 60 80 100 120 140 quiescent current vs supply total supply voltage, v s (v) normalized quiesent curent, i q (%) t c = 85 c t c = 25 c t c = -40 c small signal response frequency, f (hz) open loop gain, a (db) 10 1m 100k 10k 1k 100 10m 100 80 60 40 20 0 -20 c c = 10pf c c = 33pf c c = 100pf -v s =-v b =-50v +v s =+v b =50v c c = 220pf 120 140 1 phase response frequency, f (hz) phase, () 100k 10m 1m -180 1 c c = 10pf 2 c c = 33pf 3 c c = 100pf 4 c c = 220pf +v s = +v b = 50v -v s = -v b = -50v -165 -150 -135 -120 -105 -90 1 2 3 4 frequency, f (hz) c c = 10pf c c = 33pf c c = 100pf c c = 220pf power response 10 100 output voltage, v 0 (v pp ) 10k 100k 1m 200 5m offset voltage, v os 0 2 -2 -4 4 0 40 80 120 140 160 total supply voltage, v s (v) offset voltage vs t c = -40 c t c = 25 c t c = 85 c shut-down voltage vs temp shut-down threshold voltage, .65 .75 .6 .55 .8 .7 .5 .45 .4 case temperature, t c ( c) -40 -20 0 20 40 60 80 100 -40 -20 0 20 40 60 80 100 0 20 40 60 80 100 internal power dissipation, p(w) power derating case temperature, t c (c) 1 10 100 supply to output differential, v s -v o (v) 1 10 200 0.2 20 output current from +v s or -v s (a) safe operating area 10ms, t c =25c dc, t c =25c 100ms, t c =25c dc, t c =85c output voltage swing output current, i o (a) voltage drop from supply, (v) 9 8 7 6 5 4 3 2 1 0 0 2 4 6 8 10 w/o boost from +v s w/o boost from -v s with boost from +v s with boost from -v s t c = 25 c 50ms pulse + s r -s r compensation capacitance, c (pf) c 350 300 250 200 150 100 50 0 450 400 300 250 200 150 100 50 0 350 slew rate slew rate, (v/ us ) sinking current case temperature ( c) 100 80 60 40 20 0 -20 -40 80 90 100 110 120 130 70 quiescent current vs temp normalized quiesent curent, i q (%) sourcing current mp118 ? MP118A
mp118u 5 -in +in +v b -v b c c 2 gnd gnd 1 2 3 4 5 6 7 8 31 32 29 30 28 27 26 25 33 34 c c 1 -i sd +i sd c c view from component side + c1 c2 c4 + c3 r lim 9 10 11 12 22 24 23 21 +v s +v s +v s out nc 13 14 15 16 17 18 19 20 out out -v s -v s -v s load & feedback -v b nc nc +v b out out out back plt tp temp sd reset nc nc c5 c6 c7 c8 c c +v s -v s out c c 2 c c 1 gnd gnd +v b +v s -v b -v s -i sd +i sd r lim r f r i piezo transducer print nozzle command voltage sd reset temp notes: 1. c c has to be npo (cog) rated for full supply voltage +v s to -v s . typical values are provided in the section compensation 2. both pins 3 and 32 have to be connected to signal ground. 3. c2 and c3 are electrolytic capacitors with 10f per amp output current. 4. c1, c4, c5-c8 need to be high quality ceramic 100nf capacitors. 5. all out pins (pins 11-13 and 20-22) need to be tied together. typical application the mp118's fast slew rate and wide power band - width make it an ideal nozzle driver for industrial inkjet printers. the 10a output capability can drive hundreds of nozzles simultaneously. figure 4 shows a high level outline of mp118 in a typical piezo transducer drive application. general please read application note 1 "general operat - ing considerations" which covers stability, power supplies, heat sinking, mounting, current limit, soa interpretation. visit www.apexanalog.com for apex microtechnology, inc's complete application notes library, technical seminar workbook and evalua - tion kits. ground pins the mp118 has two ground pins (pins 3, 32). these pins provide a return for the internal capacitive bypassing of the small signal portions of the mp118. 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. figure 4: typical application figure 3: external connections mp118 ? MP118A
6 mp118u safe operating area the mosfet output stage of the mp118 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 page 4). the output stage is protected against transient fyback by the parasitic body diodes of the output stage mosfet structure. however, for protection against sustained high energy fyback external fast-recovery diodes must be used. compensation the external compensation capacitor c c is connected between pins 5 and 6. unity gain stability can be achieved with a capacitor value of at least 150pf for a minimum phase margin of 45 degrees. at higher gains more phase shift can usually be tolerated in most designs and the compensation capacitor value can be reduced resulting in higher bandwidth and slew rate. use the typical operating curves as a guide to select c c for the application. an npo (cog) type capacitor is required rated for the full supply voltage (200v). overvoltage protection although the mp118 can withstand differential input voltages up to 25v, additional external protection is recom - mended. in most applications 1n4148 signal diodes connected anti-parallel across the input pins is suffcient. in more demanding applications where bias current is important diode connected jfets such as 2n4416 will be required (q1 and q2 in figure 5). in either case the differential input voltage will be clamped to 0.7v. this is usu - ally suffcient 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 rec - ommended (z1 and z2 in figure 5). the zener diodes clamp transients to voltages within the power supply rating and also clamp power supply reversals to ground. whether zener diodes 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. 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 mp118. use electrolytic capacitors at least 10f per output amp re - quired. bypass the electrolytic capacitors with high quality ceramic capacitors (x7r) 0.1f or greater. in most applica - tions power supply terminals +v b and -v b will be connected to +v s and -v s respectively. supply voltages +v b and -v b are bypassed internally but both ground pins 3 and 32 must be connected to the system signal ground to be effective. in all cases power to the buffer amplifer stage of the mp118 at pins 8 and 25 must be connected to +v b and -v b at pins 4 and 30 respectively. provide local bypass capacitors at pins 8 and 25. see the external connections diagram on page 5 (figure 3). temperature sensing circuit a temperature sensor provides pin 7 a voltage that is proportional to the case temperature. the temperature sense pin can source/sink 50a. gain c c 1 150pf 2 68pf 5 33pf 20 10pf 34 33 +vs -vs out 3 32 gnd gnd +vb +vs -vb -vs z1 z2 -in +in q1 q2 figure 5: overvoltage protection mp118 ? MP118A
mp118u 7 integrated shut-down feature mp118 includes a latching shut-down circuit that allows turning off the output stage by any of the following condi - tions: 1. mp118 detects an over-temperature condition (see section temperature protection) 2. mp118 detects an over-current condition (see section over-current shut-down protection) 3. the external shut-down pin 9 ( sd ) is active low. the latching shut-down can be reset by applying a reset pulse (raising edge) on the reset pin 10. note: if the reset pulse is applied while one the shut-down conditions still exists (over-temperature or ( sd ) active low), the reset pulse is ignored and the mp118 will remain turned off. temperature protection the temperature sensor will shut-down the mp118 once it detects a temperature at or above 100c. the tempera - ture protection includes a hysteresis to ensure the proper cooling down of the system. note: the system will remain shut-down while the over-temperature condition exists. if the reset pulse is applied while an over-temperature condition exists, the pulse is ignored and the mp118 will remain turned off. external shut-down signal mp118 can be shut-down also by applying a low signal to the ( sd ) pin. the signal ( sd ) needs to be high impedance when not active, and pulled to gnd level when active. note: 1. if monitored, a logic 0 at the ( sd ) output indicates the part is in thermal shutdown. 2. if ( sd ) goes from logic 0 to 1, then it has traversed the hysteresis window and is now ready for a reset over-current shut-down protection two current sense lines are to be connected directly across the current sense resistor. for the over-current protection to work correctly, pin 28 must be connected to the amplifer output side and pin 27 connected to the load side of the current sense resistor r lim as shown in figure 6. this connection will bypass any parasitic resistances r p , formed by socket and solder joints as well as internal amplifer losses. the current sense resistor may not be placed anywhere in the output circuit except where shown in the fgure. the value of the current sense resistor can be calculated as follows: r lim = 0.65v/i sd boost operation with the boost feature the small signal stages of the amplifer are operated at higher supply voltages than the ampli - fers high current output stage. +v b (pins 4, 8) and -v b (pins 25, 30) are connected to the small signal stages and +v s (pins 14-16) and -v s (pins 17-19) are connected to the high current output stage. an additional 10v on the +v b and -v b pins is suffcient to allow the small signal stages to drive the output stage into the triode region and improve the output voltage swing for extra effcient operation when required. when the boost feature is not needed, +v s and -v s are connected to the +v b and -v b pins respectively. the +v b and -v b pins must not be operated at supply voltages less than +v s and -v s respectively. 34 out 11-13 20-22 33 i sd- i sd+ 27 28 r p r l in r f r lim r in figure 6: over-current protection mp118 ? MP118A
8 mp118u need technical help? contact apex support! for all apex microtechnology product questions and inquiries, call toll free 800-546-2739 in north america. for inquiries via email, please contact apex.support@apexanalog.com. international customers can also request support by contacting their local apex microtechnology sales representative. to fnd the one nearest to you, go to www.apexanalog.com important notice apex microtechnology, inc. has made every effort to insure the accuracy of the content contained in this document. however, the information is subject to change without notice and is provided "as is" without warranty of any kind (expressed or implied). apex microtechnology reserves the right to make changes without further notice to any specifcations or products mentioned herein to improve reliability. this document is the property of apex microtechnology and by furnishing this informa - tion, apex microtechnology grants no license, expressed or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. apex microtechnology owns the copyrights associated with the information contained herein and gives consent for copies to be made of the informa - tion only for use within your organization with respect to apex microtechnology integrated circuits or other products of apex microtechnology. this consent does not extend to other copying such as copying for general distribution, advertising or promotional purposes, or for creating any work for resale. apex microtechnology products are not designed, authorized or warranted to be suitable for use in products used for life support, automotive safety, security devices, or other critical applications. products in such applications are under - stood to be fully at the customer or the customers risk. apex microtechnology, apex and apex precision power are trademarks of apex microtechnolgy, inc. all other corporate names noted herein may be trademarks of their respective holders. copyright ? apex microtechnology, inc. 2014 (all rights reserved) www.apexanalog.com nov 2014 mp118u rev c 34-pin open frame fd .070 [1.78] .150 [3.81] .380 [9.65] 1.300 [33.02] .650 [16.51] c l .025 [0.63] sq. pin .100 [2.54] typ. l c l c .26 [6.6] component clearance pin 1 ?.129 [?3.28] 4 places 2.49 +.02 -.02 [ 63.2 +0.51 -0.51 ] .670 [17.02] 1.340 [34.04] .450 [11.43] 1.100 [27.94] 2.200 [55.88] 1. dimensions are inches; alternate units are [mm]. 2. recommended pcb hole diameter for pins: .050 [1.27]. 3. 2oz. copper over 600v dielectric over aluminum substrate. 4. tin over nickel plated phosphor bronze pins. 5. package weight: 18g or .63oz. 6. mount with #4 [m3] or equivalent screws. 7. it is not recommended that mounting of the package rely on the pins for mechanical support. notes: 1.63 +.02 -.02 [ 41.4 +0.51 -0.51 ] 1 fd package backplate grounding the substrate of the mp118 is an insulated metal substrate. this substrate must be connected to signal ground. connect pin 2 (back plate) to signal ground. the back plate will then be ac grounded to signal ground through a 1f capacitor. mp118 ? MP118A
|
