Low-voltage high-current multi-phase parallel DC/DC power supply protection circuit

A technology for protecting circuits and DC power supplies, applied to emergency protection circuit devices, electrical components, etc., can solve problems such as high overcurrent protection threshold, untimely fault protection, and current backflow, so as to avoid current backflow, ensure overall safety, and improve reliability effect

Inactive Publication Date: 2020-01-10
JIANGNAN INST OF COMPUTING TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the one hand, if the overall input protection circuit is used, due to the large input power, the overcurrent protection threshold will be too high, and the fault protection will not be timely; on the other hand, if the protecti

Method used

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  • Low-voltage high-current multi-phase parallel DC/DC power supply protection circuit

Examples

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Embodiment

[0020] Embodiment: a low-voltage, high-current multi-phase parallel DC / DC power supply protection circuit, including a control chip, and N-phase sub-circuits arranged in parallel;

[0021] Each phase sub-circuit includes a protection circuit and a power conversion circuit connected in series;

[0022] The protection circuit is provided with a fuse and a fault detection circuit;

[0023] The fault detection circuit is used to detect the voltage V at both ends of the fuse, compare the voltage V with the rated lower limit voltage value V0, and output a fault alarm signal when the voltage V is less than the rated lower limit voltage value V0;

[0024] The control chip is used to receive a fault alarm signal from any fault detection circuit and output a circuit disconnection signal to all the power conversion circuits so as to control the disconnection of all power conversion circuits.

[0025] Specifically, the fault detection circuit is provided with a voltage detection module, ...

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PUM

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Abstract

The invention discloses a low-voltage high-current multi-phase parallel DC/DC power supply protection circuit, which comprises a control chip and N phases of sub-circuits arranged in parallel. Each phase of sub-circuit comprises a protection circuit and a power conversion circuit which are connected in series; a fuse and a fault detection circuit are arranged in the protection circuit; the fault detection circuit is used for detecting the voltage V at the two ends of the fuse, comparing the voltage V with a rated lower limit voltage value V0, and outputting a fault alarm signal when the voltage V is smaller than the rated lower limit voltage value V0; and the control chip is used for receiving the fault alarm signal sent by any fault detection circuit and outputting a circuit disconnectionsignal to all the power conversion circuits so as to control all the power conversion circuits to be disconnected. Through the multi-phase linkage DC/DC power supply protection circuit, the overall safety of the multi-phase VRM power supply can be ensured, and the reliability of the multi-phase VRM is effectively improved.

Description

technical field [0001] The invention relates to the field of multi-phase parallel DC / DC circuits, in particular to a low-voltage and high-current multi-phase parallel DC / DC power supply protection circuit. Background technique [0002] With the development of semiconductor technology, the core power consumption of processors continues to increase, the power supply voltage continues to drop, and the core current increases. This poses a severe challenge to the design of power supply for high-power processor cores. At present, the industry generally adopts a multi-phase interleaved parallel DC / DC circuit to design a processor core power supply circuit. Multi-phase DC / DC conversion circuits work in parallel, which can effectively offset the current ripple and improve the output current capability. But at the same time, the multi-phase parallel DC / DC power supply also poses challenges to the power input protection design. On the one hand, if the overall input protection circuit...

Claims

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Application Information

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IPC IPC(8): H02H7/12
CPCH02H7/1213
Inventor 曹清丁亚军秦骏何宁袁博杨培和金利峰关通
Owner JIANGNAN INST OF COMPUTING TECH
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