PB51 • PB51A
PB51
PB51, PB51A
Power Booster Amplifier
DESCRIPTION
FEATURES
The PB51 is a high voltage, high current amplifier de-
signed to provide voltage and current gain for a small
signal, general purpose op amp. Including the power
booster within the feedback loop of the driver amplifier
results in a composite amplifier with the accuracy of the
driver and the extended output voltage range and cur-
rent capability of the booster. The PB51 can also be
used without a driver in some applications, requiring
only an external current limit resistor to function prop-
erly.
• WIDE SUPPLY RANGE – ±15V to ±150V
• HIGH OUTPUT CURRENT –
1.5A Continuous (PB51),
2.0A Continuous (PB51A)
• VOLTAGE AND CURRENT GAIN
• HIGH SLEW –
50V/µs Minimum (PB51)
75V/µs Minimum (PB51A)
• PROGRAMMABLE OUTPUT CURRENT LIMIT
• HIGH POWER BANDWIDTH – 320 kHz Mini-
mum
• LOW QUIESCENT CURRENT – 12mA Typical
• EVALUATION KIT – EK29
The output stage utilizes complementary MOSFETs,
providing symmetrical output impedance and eliminat-
ing second breakdown limitations imposed by Bipolar
Transistors. Internal feedback and gainset resistors are
provided for a pin-strapable gain of 3. Additional gain
can be achieved with a single external resistor. Com-
pensation is not required for most driver/gain configura-
tions, but can be accomplished with a single external
capacitor. Enormous flexibility is provided through the
choice of driver amplifier, current limit, supply voltage,
voltage gain, and compensation.
APPLICATIONS
• HIGH VOLTAGE INSTRUMENTATION
• ELECTROSTATIC TRANSDUCERS &
DEFLECTION
• PROGRAMMABLE POWER SUPPLIES
UP TO 280V P-P
This hybrid circuit utilizes a beryllia (BeO) sub-
strate, thick film resistors, ceramic capaci-
tors and semiconductor chips to maximize reli-
ability, minimize size and give top performance.
Ultrasonically bonded aluminum wires provide reliable
interconnections at all operating temperatures. The 12-
pin Power SIP package is electrically isolated.
EQUIVALENTꢀSCHEMATIC
+VS
8
Q2
Q1
IN
1
6
Q4
Q5
Q6
GAIN
OUT
ILIM
12
9
3.1K
Q7
2
5
COM
CC
Q11
Q8
Q9
Q10
–VS
11
Copyright © Cirrus Logic, Inc. 2011
OCTꢀ2011
APEXꢀ−ꢀPB51UREVF
PB51Uꢀ ꢀ
ꢀ
ꢀ
ꢀ
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ꢀ(All Rights Reserved)
1ꢀ
www.cirrus.com