APEX MICROTECHNOLOGY CORPORATION • TELEPHONE (520) 690-8600 • FAX (520) 888-3329 • ORDERS (520) 690-8601 • EMAIL prodlit@apexmicrotech.com

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FEATURES

• 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 Minimum

• LOW QUIESCENT CURRENT — 12mA Typical

• EVALUATION KIT — EK29

APPLICATIONS

• HIGH VOLTAGE INSTRUMENTATION

• ELECTROSTATIC TRANSDUCERS & DEFLECTION

• PROGRAMMABLE POWER SUPPLIES UP TO 280V P-P

DESCRIPTION

The PB51 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 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, pro-

viding 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

maximize reliability, minimize size and give top performance.

Ultrasonically bonded aluminum wires provide reliable inter-

connections at all operating temperatures. The 12-pin Power

SIP package is electrically isolated.

TYPICAL APPLICATION

EQUIVALENT SCHEMATIC

EXTERNAL CONNECTIONS

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12-PIN SIP

PACKAGE STYLE DP

Formed leads available. See package styles ED & EE