PA91_09 Datasheet, PDF (1/6 Pages) Cirrus Logic – High Voltage Power Operational Amplifiers

P r o d u c t IInnnnoovvaa t i o n FFrroomm
PAP9A911
High Voltage Power Operational Amplifiers
FEATURES
♦ HIGH VOLTAGE — 450V (±225V)
♦ LOW QUIESCENT CURRENT — 10mA
♦ HIGH OUTPUT CURRENT — 200mA
♦ PROGRAMMABLE CURRENT LIMIT
♦ HIGH SLEW RATE — 300V/µs
APPLICATIONS
♦ PIEZOELECTRIC POSITIONING
♦ HIGH VOLTAGE INSTRUMENTATION
♦ ELECTROSTATIC TRANSDUCERS
♦ PROGRAMMABLE POWER SUPPLIES UP
TO 440V
DESCRIPTION
The PA91 is a high voltage, low quiescent current
MOSFET operational amplifier designed as a low cost
solution for driving continuous output currents up to
200mA and pulse currents up to 350mA. The safe oper-
ating 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. Exter-
nal compensation provides flexibility in choosing band-
width and slew rate for the application. Apex Precision
Power’s Power SIP package uses a minimum of board
space allowing for high density circuit boards. The 12-
pin PowerSIP package is electrically isolated.
EQUIVALENT SCHEMATIC
12
11
+V_S
R1 R2
C1
R3
Q3
Q1
Q2
Q6
Q5
Q14A
1
–IN ^R5
R8
2
+IN
Q15
5
4 ^CC2
CC1
Q14B
R6
R9
3
I_Q
Q8
Q11
Q13
Q12
Q16
R11
R12
–V_S
7
8
R4
Q4
ILIM
9
R7 10
6
OUT
Q17
R10
PA91U
http://www.cirrus.com
Copyright © Cirrus Logic, Inc. 2009
(All Rights Reserved)
JUN 20091
APEX − PA91UREVH