01483 302 700


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Kepco Power

PAT Series

SERIES PAT are operationally programmable power modules that can be programmed to any level within their rated range and fully loaded at any output setting. These power supplies offer ultra low noise and ultra low ripple at the output.

SERIES PAT offers a single, high gain channel for voltage or current stabilization, backed by an adjustable overcurrent limiter. Six PAT Models are available.

The amplifiers have very low offsets for accurate tracking of programming instructions and exceptionally stable output in fixed applications. Voltage may be operationally controlled using the built-in stable reference and summing resistance together with an external voltage feedback rheostat.

The ratio of reference voltage to summing resistance gives a control current of approximately 1 milliampere through the external voltage feedback rheostat, for a control ratio of 1000 ohms/V. (A built-in calibrating trimmer can be used to calibrate this value).

PAT models have a built-in current sensing and feedback arrangement for protective limiting, controlled by an internal trimmer over the range 10% to 105% Io. Terminals are provided on the barrier strip for external control of the current limit function, using either a 3-terminal potentiometer or a 0-1V control voltage.

For a wider current control range, the main channel of the PAT may be connected so as to sample the drop across an external current-sensing resistor in the plus output lead. An external rheostat with careful zeroing of the built-in zeroing potentiometer will control current from 1ľA to 100% Io. (Note: the range of currents controlled by any single current-sensing resistor should be limited to a 50:1 ratio).

Operationally, the PATs are 3-terminal, unipolar, inverting d-c amplifiers in which the plus output sensing terminal serves as common between the output and an external programming signal. For isolated digital control, see Kepco SN and SNR Series.

Model  Power (W)       Output Voltage(V) Output Current (A)
PAT 7-2 20WATT 7 2
PAT15-1.5 20WATT 15 1.5
PAT21-1 20WATT 21 1
PAT40-0.5 20WATT 40 0.5
PAT72-0.3 20WATT 72 0.3
PAT100-0.2 20WATT 100 0.2


Caltest Instruments Ltd

4 Riverside Business Centre

Walnut Tree Close


Surrey GU1 4UG

United Kingdom

Tel: +44 (0) 1483 302 700

Fax: +44 (0) 1483 300 562

Email: sales@caltest.co.uk


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Caltest have been providing power sources and test instrumentation solutions for over 17 years and are proud to represent a number of industry leading manufacturers.

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