鈥?HIGH OUTPUT CURRENT 鈥?/div>
1.5A Continuous (PB58)
2.0A Continuous (PB58A)
鈥?VOLTAGE AND CURRENT GAIN
鈥?HIGH SLEW 鈥?50V/碌s Minimum (PB58)
75V/碌s Minimum (PB58A)
鈥?PROGRAMMABLE OUTPUT CURRENT LIMIT
鈥?HIGH POWER BANDWIDTH 鈥?320 kHz Minimum
鈥?LOW QUIESCENT CURRENT 鈥?12mA Typical
鈥?EVALUATION KIT 鈥?See EK50
EQUIVALENT SCHEMATIC
3
+Vs
Q2
Q1
Q3
IN
4
GAIN 6.2K
7
50K
COM
5
COMP
8
Q9
Q10
3.1K
Q7
Q11
Q8
2
CL
Q4
Q6
Q5
OUT
1
APPLICATIONS
鈥?HIGH VOLTAGE INSTRUMENTATION
鈥?Electrostatic TRANSDUCERS & DEFLECTION
鈥?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.
Figure 1. Inverting
TYPICAL APPLICATION
composite amplifier.
C
F
鈥揤s
6
EXTERNAL CONNECTIONS
R
CL
+Vs
CL
3
2
OUT
IN
4
TOP VIEW
1
COM
V
IN
R
I
+15V
OP
AMP
R
F
+Vs
IN
COM
PB58
5
鈥揤s
6
COMP
8
7
GAIN
R
G
C
C
R
CL
OUT
C
C
R
G
R
L
鈥?5V
鈥揤s
APEX MICROTECHNOLOGY CORPORATION
鈥?TELEPHONE (520) 690-8600 鈥?FAX (520) 888-3329 鈥?ORDERS (520) 690-8601 鈥?EMAIL prodlit@apexmicrotech.com
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