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Power conversion device and power conversion chip

A power conversion and chip technology, which is applied in the direction of output power conversion devices, electrical components, irreversible AC power input conversion to DC power output, etc., can solve the problem of limiting the application range of power conversion chips, increasing chip area, affecting chip specifications, etc. question

Inactive Publication Date: 2011-08-24
ITE TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above approach may not only increase the area of ​​the chip significantly, but may also affect the chip specification, thereby limiting the application range of the power conversion chip.

Method used

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  • Power conversion device and power conversion chip
  • Power conversion device and power conversion chip
  • Power conversion device and power conversion chip

Examples

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Embodiment Construction

[0050] It is known that configuring the overvoltage protection circuit in the power conversion chip requires adding an independent pin connected to the load terminal, which is only used by the overvoltage protection circuit, which may limit the application range of the power conversion chip.

[0051] In contrast, the embodiments of the present invention provide a power conversion device and a power conversion chip. The power conversion device includes a power conversion inductor, a rectifier diode and a power conversion capacitor. The anode of the rectifier diode is electrically connected to the power conversion inductor. The cathode of the rectifier diode is electrically connected to the power conversion capacitor and the load. The power conversion chip includes a power switch and an overvoltage protection circuit. The overvoltage protection circuit includes a voltage divider circuit, a peak rectification circuit and a comparator. The power switch is electrically connected...

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Abstract

The invention provides a power conversion device and a power conversion chip. The power conversion device comprises a power conversion inductor and the power conversion chip. The power conversion inductor can generate a drive power supply according to the input power; one pin of the power conversion chip receives the drive power; the power conversion chip comprises an overvoltage protecting circuit, a power switch and a control circuit; the overvoltage protecting circuit and the power switch are electrically connected with the pin; the overvoltage protecting circuit can generate an overvoltage protecting signal according to a reference signal and the drive power; and the control circuit can generate a pulse width modulating signal according to the overvoltage protecting signal so as to control the power switch.

Description

technical field [0001] The invention relates to a power conversion chip, in particular to a power conversion chip with an overvoltage protection function. Background technique [0002] With the advancement of science and technology, electronic products with various functions have been developed one after another. Since electronic products usually include multiple integrated circuits and different loads, their operating voltages are not all the same. Therefore, electronic products often need to be equipped with a power converter to convert a fixed level of voltage into the operating voltage required by each integrated circuit. [0003] A power converter is a voltage conversion circuit that uses the alternating charging of an inductor and a capacitor. Power converters have various architectures, such as boost, buck, inverting, transformer flyback, etc. architectures. [0004] In the known technology, in order to prevent the power converter from outputting an excessive volta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M7/12H02M1/00
Inventor 张钰伟
Owner ITE TECH INC
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