pa93/27u 1 pa93/27 features ? high voltage 400v (200v) ? low quiescent current 10ma ? high output current 8a ? programmable current limit applications ? piezoelectric positioning ? high voltage instrumentation ? electrostatic transducers ? programmable power supplies up to 390v q1 q2 r1a r1b c1 r3 q3 cc1 cc2 q6 q5 r5 r8 r9 q15 r11 r12 q16 q12 q8 r4 r7 q4 ilim out q18 r15 q13 q11 +v s Cin +in Cv s r6 q14a q14b high voltage power operational amplifiers pa93/27 p r o d u c t i n n o v a t i o n f r o m description the pa93/27 is a high voltage, low quiescent current mosfet operational amplifer designed as a low cost solution for driving continuous output currents up to 8a and pulse currents up to 14a. the safe operating area (soa) has no second breakdown limitations and can be observed for all type loads by choosing an appropri - ate current limiting resistor. the mosfet output stage is biased ab for linear operation. external compensa - tion provides fexibility in choosing bandwidth and slew rate for the application. apexs power sip package uses a minimum of board space allowing for high den - sity circuit boards. the power sip package is electri - cally isolated. equivalent schematic copyright ? cirrus logic, inc. 2010 (all rights reserved) www.cirrus.com mar 2010 apex - PA93-27urevd p r o d u c t i n n o v a t i o n f r o m
2 pa93/27u pa93/27 specifications the pa93/27 is constructed from mosfet transistors. esd handling procedures must be ob - served. the exposed substrate contains beryllia (beo). do not crush, machine, or subject to tem - peratures in excess of 850c to avoid generating toxic fumes. caution parameter symbol min max units supply voltage, +v s to -v s 400 v output current, source, sink, peak, within soa 14 a power dissipation, continuous @ t c = 25c 125 w input voltage, differential -20 20 v input voltage, common mode -v s v s v temperature, pin solder, 10s max. 260 c temperature, junction (note 2) 150 c temperature range, storage ?40 85 c operating temperature range, case ?25 85 c 1. characteristics and specifications absolute maximum ratings 1 2 3 4 5 6 7 8 9 10 Cin +in r cl +v s Cv s to load and feedback (see text.) 11 12 r c c c * * * bypassing required. i q patented 12-pin sip package style dp formed leads available see package style ee external connections parameter test conditions 1 min typ max units input offset voltage, initial 2 10 mv offset voltage vs. temperature full temperature range 15 50 v/c offset voltage vs. supply 10 25 v/v offset voltage vs. time 75 v/khz bias current, initial 200 2000 pa bias current vs. supply 4 pa/v offset current, initial 50 500 pa input impedance, dc 10 11 ? input capacitance 4 pf common mode voltage range (note 3) v s ? 15 v common mode rejection, dc v cm = 90v 80 98 db noise 100khz bandwidth, r s = 1k?, c c = 10pf 1 v rms p r o d u c t i n n o v a t i o n f r o m
pa93/27u 3 pa93/27 notes: 1. unless otherwise noted: t c = 25c, dc input specifcations are value given. power supply voltage is typical rating. r c = 100 c c = 220pf. 2. long term operation at the maximum junction temperature will result in reduced product life. derate internal power dissipation to achieve high mttf. 3. +v s and Cv s denote the positive and negative power supply rail respectively. 4. rating applies if the output current alternates between both output transistors at a rate faster than 60hz. 5. derate max supply rating .625 v/c below 25c case. no derating needed above 25c case. parameter test conditions 1 min typ max units gain open loop, @ 15hz r l = 2k, c c = 10pf 94 111 db gain bandwidth product @ 1mhz r l = 2k, c c = 10pf 12 mhz power bandwidth r l = 2k, c c = 10pf 30 khz phase margin full temp range 60 output voltage swing (note 3) i o = 8a v s ? 12 v s ? 10 v current, continuous 8 a slew rate, a v = 100 c c = 10pf 50 v/s capacitive load, a v = +1 full temp range 1 nf settling time to 0.1% c c = 10pf, 2v step 1 s resistance, no load 10 ? power supply voltage (note 5) 40 150 200 v current, quiescent 9.5 11 14 ma thermal resistance, ac, junction to case (note 4) full temp range, f > 60hz 0.7 c/w resistance, dc, junction to case full temp range, f < 60hz 1 c/w resistance, junction to air full temp range 30 c/w temperature range, case meets full range specifcations -25 +85 c typical application low power, piezoelectric positioning piezo positioning may be applied to the focusing of segmented mirror systems. the composite mirror may be composed of hundreds of elements, each requiring focusing under comput - er control. in such complex systems the pa93/27 reduces the costs of power supplies and cooling with its advantages of low cost and low quiescent power consumption while increasing circuit density with the sip package. f r pa93 in r 1 2 6 7,8 9,10 11,12 piezo drive s Cv s +v out v computer focus command voltage cl r p r o d u c t i n n o v a t i o n f r o m
4 pa93/27u pa93/27 this data sheet has been carefully checked and is believed to be reliable, however, no responsibility is assumed for possible inaccuracies or omissions. all specifcations are subject to change without notice. PA93-27u rev a october 2006 ? 2006 apex microtechnology corp. 0 25 50 75 100 125 case temperature, t c (c) 0 75 100 power derating internal power dissipation 100k frequency f (hz) 135 90 phase response phase, () 100k frequency, f (hz) C10 0 30 small signal response open loop gain, a (db) 10 20 40 50 0 6 8 output current, i o (a) 7 9 output voltage swing 6 8 1m frequency, f (hz) 10 output voltage, v o (v p-p ) 100 400 0 .2 .3 .5 .6 resistor value, r cl () 0 2 8 current limit current limit, i lim (a) 4 6 10 60 ext. compensation capacitor, c c (pf) 1 slew rate slew rate, (v/s) 4 3 2 60 100 200 300 20 40 25 50 100 case temperature, t c (c) 1.2 normalized quies. current normalized quiescent current, i q (x) 1.0 .1 .4 2 voltage drop from supply, v s C v o (v) 225 50 25 125 power response 75 1m 10m 270 180 125 1.4 1.8 1.6 4 5 100k 40 20 10 8 6 30 30 1k 10k 1m 10m c c = 220pf c c = 100pf c c = 47pf c c = 10pf frequency, f (hz) input noise voltage, v n (nvhz) frequency, f (hz) harmonic distortion distortion, (%) .01 .1 10k 100 1k input noise voltage 2 7 10 20 5 3 15 .001 p o = 1w p o = 20w p o = 62w c c = 220pf c c = 100pf c c = 47pf c c = 10pf c c = 220pf c c = 100pf c c = 47pf c c = 10pf 10 100k 10k 1k 100 p r o d u c t i n n o v a t i o n f r o m
pa93/27u 5 pa93/27 phase compensation gain c c * r c 1 220pf 100 2 100pf 100 4 47pf 0 17 10pf 0 *c c never to be <10pf. c c to be rated for the full supply voltage +v s to -v s . use ceramic npo (cog) type. general please read application note 1 "general operating considerations" which covers stability, supplies, heat sinking, mounting, current limit, soa interpretation, and specifcation interpretation. visit www.cirrus.com for design tools that help automate tasks such as calculations for stability, internal power dissipation, current limit; heat sink selec - tion; apexs complete application notes library; technical seminar workbook; and evaluation kits. current limit for proper operation, the current limit resistor (r cl ) must be connected as shown in the external connection dia - gram. for optimum reliability the resistor value should be set as high as possible. the value is calculated as follows; with the maximum practical value of 16 ohms. .65 r cl = i lim safe operating area (soa) the mosfet output stage of this power operational am - plifer has two distinct limitations: 1. the current handling capability of the mosfet ge - ometry and the wire bonds. 2. the junction temperature of the output mosfets. note: the output stage is protected against transient fyback. however, for protection against sustained, high energy fyback, external fast-recovery diodes should be used. safe operating curves the safe operating area curves defne the maximum ad - ditional internal power dissipation the amplifer can toler - ate when it produces the necessary output to drive an external load. input protection although the pa93/27 can withstand differential voltages up to 20v, additional external protection is recommend - ed. low leakage, low capacitance jfets connected as diodes are recommended (e.g. 2n4416, q1-q4 in figure 2). the differential input voltage will be clamped to 1.4v. this is suffcient overdrive to produce maximum power bandwidth. supply to output differential, v s C v o (v) 10 20 30 40 100 200 300 500 output current from +v s or Cv s , (a) .1 .08 .06 .6 .4 .3 .2 .8 3 2 1 4 6 8 20 10 dc,t c = 125c 100ms 60 80 200ms dc, t c = 25c dc,t c = 85c soa p r o d u c t i n n o v a t i o n f r o m
6 pa93/27u pa93/27 power supply protection unidirectional zener diode transient suppressors are recommended as protection on the supply pins. see figure 2. 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 regu - lation. conditions which can cause open circuits or polarity reversals on either power supply rail should be avoided or protected against. reversals or opens on the negative supply rail is known to induce input stage failure. unidirectional transzorbs prevent this, and it is desirable that they be both electrically and physically as close to the amplifer as possible. stability the pa93/27 is externally compensated and performance can be tailored to the application. use the graphs of small signal response and power response as a guide. the compensation capacitor c c must be rated at 500v working voltage. an npo capacitor is recommended. the compensation network c c r c must be mounted closely to the am - plifer pins 4 and 5 to avoid spurious oscillation. quiescent current reduction when pin 3 (i q ) is shorted to pin 5 (cc2) the ab biasing of the output stage is disabled. this lowers quiescent power but also raises distortion since the output stage is then class c biased. the output stage bias current is nominally set at 1ma. pin 3 may be left open if not used. +v s Cin +in z1 z2 11, 12 7, 8 1 2 6 pa93 q1 q2 Cv s q3 q4 figure 2. overvoltage protection contacting cirrus logic support for all apex precision power product questions and inquiries, call toll free 800-546-2739 in north america. for inquiries via email, please contact tucson.support@cirrus.com. international customers can also request support by contacting their local cirrus logic sales representative. to fnd the one nearest to you, go to www.cirrus.com important notice cirrus logic, inc. and its subsidiaries ("cirrus") believe that the information contained in this document is accurate and reliable. however, the information is subject to change without notice and is provided "as is" without warranty of any kind (express or implied). customers are advised to obtain the latest version of relevant information to verify, before placing orders, that information being relied on is current and complete. all products are sold subject to the terms and conditions of sale supplied at the time of order acknowledgment, including those pertaining to warranty, indemnifcation, and limitation of liability. no responsibility is assumed by cirrus for the use of this information, including use of this information as the basis for manufacture or sale of any items, or for infringement of patents or other rights of third parties. this document is the property of cirrus and by furnishing this information, cirrus grants no license, express or implied under any patents, mask work rights, copyrights, trademarks, trade secrets or other intellectual property rights. cirrus owns the copyrights associated with the information contained herein and gives con - sent for copies to be made of the information only for use within your organization with respect to cirrus integrated circuits or other products of cirrus. 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. certain applications using semiconductor products may involve potential risks of death, personal injury, or severe prop - erty or environmental damage (critical applications). cirrus products are not designed, authorized or warranted to be suitable for use in products surgically implanted into the body, automotive safety or security devices, life support prod - ucts or other critical applications. inclusion of cirrus products in such applications is understood to be fully at the cus - tomers risk and cirrus disclaims and makes no warranty, express, statutory or implied, including the implied warranties of merchantability and fitness for particular purpose, with regard to any cirrus product that is used in such a manner. if the customer or customers customer uses or permits the use of cirrus products in critical applications, customer agrees, by such use, to fully indemnify cirrus, its officers, directors, employees, distributors and other agents from any and all liability, including attorneys fees and costs, that may result from or arise in connection with these uses. cirrus logic, cirrus, and the cirrus logic logo designs, apex precision power, apex and the apex precision power logo designs are trademarks of cirrus logic, inc. all other brand and product names in this document may be trademarks or service marks of their respective owners. p r o d u c t i n n o v a t i o n f r o m
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