|Zelenograd NanoTechnology Center|
The microcircuit is designed to control and record electric current, both direct and alternating, with complete galvanic isolation of the measured and measuring circuits for application in the spacecraft on-board equipment. It is used to control electric motors, in particular in variable speed drives, variable frequency AC drives, converters for DC drives, overcurrent protection devices.
The microcircuit converts the current at the input pin into a control signal at the open collector output of the high voltage transistor. Under normal operating conditions, the operating cycle of the power transistor decreases linearly as the current on the CONTROL pin increases. It contains an N-channel field effect transistor with a control circuit, a voltage reference, a PWM regulator, a start and restart circuit, a PWM modulator error signal amplifier, and a protection circuit.