
APEX MICROTECHNOLOGY CORPORATION
TELEPHONE (520) 690-8600 FAX (520) 888-3329 ORDERS (520) 690-8601 EMAIL prodlit@apexmicrotech.com
FEATURES
WIDE SUPPLY RANGE —
±
15V to
±
150V
HIGH OUTPUT CURRENT —
1.5A Continuous (PB58)
2.0A Continuous (PB58A)
VOLTAGE AND CURRENT GAIN
HIGH SLEW — 50V/
μ
s Minimum (PB58)
75V/
μ
s Minimum (PB58A)
PROGRAMMABLE OUTPUT CURRENT LIMIT
HIGH POWER BANDWIDTH — 320 kHz Minimum
LOW QUIESCENT CURRENT — 12mA Typical
EVALUATION KIT — See EK50
APPLICATIONS
HIGH VOLTAGE INSTRUMENTATION
Electrostatic TRANSDUCERS & DEFLECTION
Programmable Power Supplies Up to 280V p-p
DESCRIPTION
The PB58 is a high voltage, high current amplifier designed
to provide voltage and current gain for a small signal, general
purpose op amp. Including the power booster within the feed-
back loop of the driver amplifier results in a composite amplifier
with the accuracy of the driver and the extended output voltage
range and current capability of the booster. The PB58 can also
be used without a driver in some applications, requiring only an
external current limit resistor to function properly.
The output stage utilizes complementary MOSFETs, provid-
ing symmetrical output impedance and eliminating 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. Compensation is not required for most driver/gain
configurations, 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.
This hybrid circuit utilizes a beryllia (BeO) substrate, thick film
resistors, ceramic capacitors and semiconductor chips to maxi-
mize reliability, minimize size and give top performance.
Ultrasonically bonded aluminum wires provide reliable inter-
connections at all operating temperatures. The 8-pin TO-3
package is electrically isolated and hermetically sealed using
one-shot resistance welding. The use of compressible isolation
washers voids the warranty.
TYPICAL APPLICATION
C
F
Figure 1. Inverting
composite amplifier.
OP
AMP
PB58
R
F
V
IN
R
I
+15V
–15V
IN
COM
+Vs
–Vs
R
CL
OUT
C
C
R
G
R
L
1
2
3
4
5
6
7
8
TOP VIEW
CL
+Vs
IN
COM
–Vs
GAIN
R
G
COMP
C
C
OUT
R
CL
EQUIVALENT SCHEMATIC
EXTERNAL CONNECTIONS
3
1
2
6
8
5
4
7
IN
GAIN
COM
COMP
Q1
Q4
Q2
Q3
Q5
Q6
Q7
Q8
Q10
Q9
+Vs
OUT
CL
–Vs
Q11
6.2K
50K
3.1K
HTTP://WWW.APEXMICROTECH.COM (800) 546-APEX (800) 546-2739
M I C R O T E C H N O L O G Y
POWER BOOSTER AMPLIFIERS
PB58 PB58A