Capacitive load testing device of power supply

摘要

A device for testing capacitive loads of a power supply includes a controller, a power supply switching circuit, a capacitive load switching circuit, and a current sampling circuit. The power supply switching circuit selects one of output voltages of the power supply to be electronically connected to the capacitive load switching circuit and the current sampling circuit. The current sampling circuit samples an output current of one output of the power supply selected by the controller. The controller turns on and off switches of the capacitive load switching circuit for matching an output current of the power supply with a reference current until the output current equals to the reference current. The controller outputs a total magnitude of the capacitive loads.

主权项

1. A device for testing a largest capacitive load value of a power supply, the device comprising:
a controller electronically connected to the power supply, a power supply switching circuit, a capacitive load switching circuit, a current sampling circuit; wherein the power supply switching circuit selects one output of the power supply to be electronically connected to the capacitive load switching circuit and the current sampling circuit, causing the power supply switching circuit to be electronically connected to the power supply, the capacitive load switching circuit, and the current sampling circuit; wherein the capacitive load switching circuit comprises a plurality of capacitive loads; wherein the controller receives from the current sampling circuit a sample of a current of the one output of the power supply; and wherein the controller controls the capacitive load switching circuit to selectively provide at least one capacitive load of the plurality of capacitive loads to be electronically connected to the power supply in parallel, and the controller compares the sampled current of the one output of the power supply with a reference current until a value of the said sampled current of the one output of the power supply equaling a value of the reference current is reached, and the controller outputs a total value of the at least one capacitive load.