Development of Switching Power Supply with Precision Continuously Adjustable High Voltage

摘要

The techniques for developing a kind of the precision continuously adjustable high-voltage switching power supply are proposed, based on the constant frequency pulse width modulation strategies with SG3525, and the continuous output voltage adjustment effect is achieved through a gain amplifier controlled by MCU. The circuit is of the significant features such as high precision output voltages, continuously adjustable, a wide adjustment range and a low power consumption. The results of the experiments show that the output voltage is adjustable between 1KV and 25KV, and the maximum output voltage error is 1.6%.