PB50 RoHS Power Booster Amplifier COMPLIANT FEATURES Wide Supply Range 30V to 100V High Output Current Up to 2A Continuous Voltage and Current Gain High Slew Rate 50V/s 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 DESCRIPTION The PB50 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 feedback 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 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 elimi- nating secondary breakdown limitations imposed by Bipolar Junction Transistors. Internal feedback and gain- set 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 configurations, but can be accomplished with a single external capacitor. Although the booster can be configured quite simply, enormous flexibility is pro- vided 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 semicon- ductor chips to maximize reliability, minimize size and give top performance. Ultrasonically bonded alumi- num 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 isola- tion washers voids the warranty. Apex Microtechnology Inc. Aug 2015 www.apexanalog.com All rights reserved PB50U Rev NPB50 TYPICAL CONNECTIONS Figure 1: Typical Connections 2 PB50U Rev N