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Chip power supply circuit

A power supply circuit and chip technology, applied in the direction of electrical components, output power conversion devices, etc., can solve the problem of high cost

Active Publication Date: 2020-10-20
CRM ICBG (WUXI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a chip power supply circuit for solving the problem of high cost caused by the need for additional energy storage capacitors in the prior art

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  • Chip power supply circuit

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Embodiment Construction

[0047] The implementation of the present invention will be illustrated by specific specific examples below, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0048] see figure 1 . It should be noted that the structures, proportions, sizes, etc. shown in the drawings attached to this specification are only used to match the content disclosed in the specification, for those who are familiar with this technology to understand and read, and are not used to limit the implementation of the present invention. Limiting conditions, so there is no technical substantive meaning, any modification of structure, change of proportional relationship or adjustment of size, without affecting the effect and purpose of the present invention, should still fall within the scope of the present invention. The disclosed technical content must be within the scope covered. At the same time, term...

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Abstract

The invention provides a chip power supply circuit. The chip power supply circuit comprises a step-down transistor, a control module, a first switching tube, a second switching tube, a third switchingtube, a fourth switching tube and a power switching tube. According to the chip power supply circuit, the first end of the second switch tube is directly connected with the step-down transistor, thesecond switching tube can directly obtain enough driving current from the step-down transistor to drive the power switching tube, so that the reliability and the efficiency of the system are ensured,an energy storage capacitor does not need to be additionally arranged, and the cost of the system is reduced.

Description

technical field [0001] The invention belongs to the technical field of circuit design, in particular to a chip power supply circuit. Background technique [0002] For a switching power supply system, it is necessary to drive a power switch tube during work. At the moment when the power switch tube is driven, it is necessary to provide sufficient driving current to the grid of the power switch tube to meet the reliability and reliability of the switching power supply system. Efficiency; this requires an external energy storage capacitor on the power supply pin of the switching power supply chip to ensure that the power switching tube has sufficient current driving capability at the moment of driving. However, additionally setting the energy storage capacitor will inevitably lead to higher cost of the switching power supply system. Contents of the invention [0003] In view of the above-mentioned shortcomings of the prior art, the purpose of the present invention is to prov...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/08
CPCH02M1/08Y02B70/10
Inventor 李进尤勇
Owner CRM ICBG (WUXI) CO LTD