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FEATURES
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•
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HIGH VOLTAGE — 400V (±200V)
LOW QUIESCENT CURRENT — 10mA
HIGH OUTPUT CURRENT — 4A
PROGRAMMABLE CURRENT LIMIT
PATENTED
APPLICATIONS
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PIEZOELECTRIC POSITIONING
HIGH VOLTAGE INSTRUMENTATION
ELECTROSTATIC TRANSDUCERS
PROGRAMMABLE POWER SUPPLIES UP TO 390V
12-PIN SIP
PACKAGE STYLE DP
Formed leads availablewith
package styles ED & EE
TYPICAL APPLICATION
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DESCRIPTION
The PA92 is a high voltage, low quiescent current MOSFET
operational amplifier designed as a low cost solution for driving
continuous output currents up to 4A and pulse currents up to
7A. The safe operating area (SOA) has no second breakdown
limitations and can be observed for all type loads by choosing
an appropriate current limiting resistor. The MOSFET output
stage is biased AB for linear operation. External compensation
provides flexibility in choosing bandwidth and slew rate for the
application. APEX’s Power SIP package uses a minimum
of board space allowing for high density circuit boards. The
Power SIP package is electrically isolated.
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EQUIVALENT SCHEMATIC
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LOW POWER, PIEZOELECTRIC POSITIONING
Piezo positioning may be applied to the focusing of segment-
ed mirror systems. The composite mirror may be composed of
hundreds of elements, each requiring focusing under computer
control. In such complex systems the PA92 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.
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PHASE COMPENSATION
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GAIN
CC*
RC
≥1
150pF
100Ω
≥2
100pF
100Ω
≥3
47pF
0Ω
≥12
10pF
0Ω
*CC Never to be <10pF. CC to be rated for the full supply
voltage +V to -Vs. Use ceramic NPO (COG) type.
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EXTERNAL CONNECTIONS
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APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com
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