Gate drive circuit and gate drive method for hybrid boost converter

By using the gate drive circuit of the hybrid boost converter, isolation technology is used to convert low-voltage domain signals into high-voltage domain signals, solving the problem that Cuk converters cannot be applied to high-voltage domains. This achieves voltage conversion and circuit module isolation in the high-voltage domain, ensuring the normal operation of the converter.

CN121841076BActive Publication Date: 2026-07-14HANGZHOU YUANXIN SEMICON TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU YUANXIN SEMICON TECH CO LTD
Filing Date
2026-03-11
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

Cuk converters cannot be used in the high-voltage domain and cannot perform voltage conversion in the high-voltage domain.

Method used

A gate drive circuit for a hybrid boost converter is provided, which converts the gate drive signal in the low-voltage domain into a drive signal in the high-voltage domain through isolation, thereby realizing the alternating control of the high-side and low-side power transistors. The circuit includes two methods: chip junction isolation and capacitor isolation.

Benefits of technology

The isolation between the low-voltage circuit module and the high-voltage drive module is achieved, ensuring the normal operation of the hybrid boost converter in different voltage domains and avoiding the problem of large-capacity capacitors occupying PCB area.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a gate driving circuit and a gate driving method of a hybrid boost converter, and belongs to the technical field of circuits. When the hybrid boost converter comprises a high-side power tube and a low-side power tube, the gate driving circuit converts a gate driving signal in a low-voltage domain into a high-side driving signal and a low-side driving signal in a high-voltage domain through isolation, alternately outputs the high-side driving signal and the low-side driving signal, so that the high-side driving signal drives the high-side power tube to switch, and the low-side driving signal drives the low-side power tube to switch; when the hybrid boost converter comprises the low-side power tube and does not comprise the high-side power tube, the gate driving circuit converts the gate driving signal in the low-voltage domain into the low-side driving signal in the high-voltage domain through isolation and outputs the low-side driving signal, so that the low-side driving signal drives the low-side power tube to switch. The application realizes the isolation of a low-voltage circuit module and a high-voltage driving module and the transmission of a gate driving signal between different voltage domains, and ensures the normal work of the hybrid boost converter.
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