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Constant voltage generation circuit-on-chip and chip

A technology of constant voltage and circuit generation, applied in electrical components, adjusting electrical variables, instruments, etc., can solve the problem of external high voltage in the internal circuit of the chip, etc., to achieve the effect of convenient use

Pending Publication Date: 2018-01-26
FUJIAN FUXIN ELECTRONICS TECH CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to provide a new on-chip constant voltage generation circuit, which solves the problem in the prior art that the internal circuit of the chip is connected to a high voltage and accurately generates a low voltage

Method used

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  • Constant voltage generation circuit-on-chip and chip
  • Constant voltage generation circuit-on-chip and chip
  • Constant voltage generation circuit-on-chip and chip

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Embodiment Construction

[0032] In order to describe the technical content, structural features, achieved goals and effects of the present invention in detail, the following will be described in detail in conjunction with the embodiments and accompanying drawings.

[0033] see figure 2 or image 3 , the present invention designs an on-chip constant voltage generating circuit, comprising a step-down circuit 1, a current control circuit 2, a voltage sampling circuit 3, and a feedback circuit 4;

[0034] The input end of the step-down circuit 1 is connected to the off-chip input voltage, the output end of the step-down circuit 1 is connected to the input end of the current control circuit 2, the output end of the current control circuit 2 is connected to the constant voltage output end VCC, and the current control circuit 2 The output terminal is also connected to the input terminal of the sampling circuit 3, the output terminal of the sampling circuit 3 is connected to the input terminal of the feedba...

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Abstract

The present invention provides a constant voltage generation circuit-on-chip and a chip, wherein the constant voltage generation circuit-on-chip comprises a buck circuit, a current control circuit, avoltage sampling circuit and a feedback circuit. The input end of the buck circuit is connected with an input voltage out of the chip, and the output end is connected with the input end of the currentcontrol circuit. The output end of the current control circuit is connected with a constant voltage output end and the input end of the sampling circuit, and the output end of the sampling circuit isconnected with the input end of the feedback circuit. The first control end of the feedback circuit is connected with the control end of the buck circuit, and the second control end is connected withthe control end of the current control circuit. According to the present invention, the problems that the generation of the internal voltage of the chip is not accurate enough, and the energy consumption of an external power supply system is too high, are solved.

Description

technical field [0001] The invention relates to the field of power supply circuit design, in particular to an on-chip constant voltage generating circuit capable of high-voltage input and stable output conversion. Background technique [0002] In the field of microelectronics, a large number of convenient, thin and low-power mobile electronic devices have emerged in the consumer electronics market, improving people's lives. These consumer mobile electronic devices have also driven the development of power management ICs, and put forward higher index requirements for power management ICs. [0003] In the field of switching power supply, the input AC power is 85Vac~265Vac, and the AC power needs to be rectified into DC, and converted into a low voltage that the chip can withstand and power the chip. In the existing technology, the rectified high voltage is generally connected to the starting resistor and the starting capacitor to the ground, and one end of the capacitor is co...

Claims

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Application Information

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IPC IPC(8): H02M3/156
Inventor 陈朝勇李华锋
Owner FUJIAN FUXIN ELECTRONICS TECH CO LTD
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