2017•Unpublished venueRequires access

Design a wide output range power supplies with assisted linear amplifier

Ming-Tsun Tsai, Ching‐Lung Chu, Char-Yong Siow, Syuan-Neng Jhao

Abstract

This paper proposed a hybrid power system with combined advantageous features of switching power supply and linear power amplifier. The switching power supply would provide the primary output voltage and power to the load, while the linear power amplifier would act as a correcting amplifying device to compensate for power ripple as a way to stabilize voltage output. Combination of these two components can reduce the output voltage ripple, and improve the overall efficiency simultaneously. This paper compares two topologies to fit the required wide output voltage range function: one is to use a interleaved phase-shifted full-bridge converter to decrease output voltage ripple; the other is to use a linear power amplifier combined with a phase-shifted full-bridge converter. Two prototypes have the same maximum output power about 500W at 5V to 50V output range would be tested to prove the control method.

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Available abstract

Key concepts: Switched-mode power supply, Ripple, Power supply rejection ratio, Linear amplifier, Amplifier, Electronic engineering, Electrical engineering, Control theory (sociology)