The characteristics:

* for the linear power amplifier, low noise, no interference, circuit is reasonable, high reliability.

* with output voltage and current, and the output voltage of the 0.1V/V instructions and 0.1V/A output current test port.

* with constant voltage, constant current output of two kinds of working mode, and the input signal can be inverse function.

* has over-current, over temperature, overvoltage, undervoltage protection indication function.

* with 20A, 40A, 60A, 80A output current limiting function.