DESCRIPTION

The PB50 is a high voltage, high current amplifer 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 amplifer results in a composite amplifer with the accuracy of the driver and the extended output voltage range and current capability of the booster. The PB50 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 secondary breakdown limitations imposed by Bipolar Junction Transis tors. Internal feedback and gainset resistors are provided for a pin-strappable gain of 3. Additional gain can be achieved with a single external resistor. Compensation is not required for most driver/gain confgurations, but can be accomplished with a single external capacitor. Although the booster can be confgured quite simply, enormous flexibility is provided through the choice of driver amplifer, current limit, supply voltage, voltage gain, and compensation.

This hybrid circuit utilizes a beryllia (BeO) substrate, thick flm 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 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.

FEATURES

• WIDE SUPPLY RANGE — ±30V to ±100V

• HIGH OUTPUT CURRENT — Up to 2A Continuous

• VOLTAGE AND CURRENT GAIN

• HIGH SLEW RATE — 50V/µs Minimum

• PROGRAMMABLE OUTPUT CURRENT LIMIT

• HIGH POWER BANDWIDTH — 160 kHz Minimum

• LOW QUIESCENT CURRENT — 12mA Typical

APPLICATIONS

• HIGH VOLTAGE INSTRUMENTATION

• Electrostatic TRANSDUCERS & DEFLECTION

• Programmable Power Supplies Up to 180V p-p