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Characterization of SiN Integrated Optical Phased Arrays on a Wafer-Scale Test Station

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Published on: April 1, 2020

Analysis and control of a phase-shift parallel switch cell.

Haibing Wang^1,2, Zhiyuan Peng², Shaobo Ma²

¹State Key Laboratory of Mechanical Transmission for Advanced Equipment, Chongqing University, Chongqing, China.

Scientific Reports

|July 14, 2026

Summary

A new phase-shift parallel switch cell (PSPSC) increases equivalent switching frequency (ESF) by n times without increasing semiconductor switching losses. This method reduces current ripple in power converters.

Keywords:

Actual switching frequency Equivalent switching frequency Phase-shift parallel switch cell Power converter

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Area of Science:

Electrical Engineering
Power Electronics
Converter Design

Background:

High power density in power converters is achieved by increasing switching frequency.
Directly increasing actual switching frequency (ASF) is limited by semiconductor device switching times and losses.

Purpose of the Study:

To propose a novel phase-shift parallel switch cell (PSPSC) and control scheme.
To increase the equivalent switching frequency (ESF) without increasing the actual switching frequency (ASF) of individual semiconductor devices.

Main Methods:

The PSPSC replaces a single controllable switch in conventional DC-DC converters with n parallel switches.
A control scheme sequentially drives these parallel switches using phase-shifted carrier signals.
The equivalent duty cycle is evenly distributed among the n switches.

Main Results:

The equivalent switching frequency (ESF) was increased to n times the actual switching frequency (ASF).
In a prototype with n=2, ESF increased from 10 kHz to 20 kHz.
Inductor current ripple was reduced by approximately 48-51% in buck and boost converter tests.

Conclusions:

The PSPSC effectively multiplies the switching frequency and reduces passive component ripple requirements.
This approach distributes device current stress, avoiding direct increases in individual semiconductor switching frequencies.
The PSPSC offers a viable strategy for enhancing power density in DC-DC converters.