鈥?HIGH OUTPUT CURRENT 鈥?/div>
1.5A Continuous (PB51), 2.0A Continuous (PB51A)
鈥?VOLTAGE AND CURRENT GAIN
鈥?HIGH SLEW 鈥?50V/碌s Minimum (PB51)
75V/碌s Minimum (PB51A)
鈥?PROGRAMMABLE OUTPUT CURRENT LIMIT
鈥?HIGH POWER BANDWIDTH 鈥?320 kHz Minimum
鈥?LOW QUIESCENT CURRENT 鈥?12mA Typical
鈥?EVALUATION KIT 鈥?EK29
APPLICATIONS
鈥?HIGH VOLTAGE INSTRUMENTATION
鈥?ELECTROSTATIC TRANSDUCERS & DEFLECTION
鈥?PROGRAMMABLE POWER SUPPLIES UP TO 280V P-P
EQUIVALENT SCHEMATIC
8 +V
S
Q2
Q1
Q3
DESCRIPTION
The PB51 is a high voltage, high current ampli鏗乪r designed
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 ampli鏗乪r results in a composite
ampli鏗乪r with the accuracy of the driver and the extended
output voltage range and current 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 properly.
The output stage utilizes complementary MOSFETs,
providing 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 con鏗乬urations, but can be accomplished with
a single external capacitor. Enormous 鏗俥xibility is provided
through the choice of driver ampli鏗乪r, current limit, supply
voltage, voltage gain, and compensation.
This hybrid circuit utilizes a beryllia (BeO) substrate, thick
鏗乴m resistors, ceramic capacitors and semiconductor chips to
maximize reliability, 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.
IN 1
Q4
Q6
Q5
GAIN 6
12 OUT
3.1K
Q7
COM 2
Q11
Q8
Q9
Q10
9
ILIM
CC 5
11 鈥揤
S
EXTERNAL CONNECTIONS
1
2
3
4
5
6
7
8
PACKAGE: SIP03
TYPICAL APPLICATION
C
F
R
F
+Vs
IN
COM
鈥?5V
PB51
OUT
C
C
R
G
9
10
11
12
V
IN
R
I
+15V
OP
AMP
R
CL
IN
COM
NC
NC
C
C
R
G
NC
+V
S
NC
鈥揤
S
R
CL
R
L
OUT
鈥揤s
FIGURE 1. INVERTING COMPOSITE AMPLIFIER.
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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