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Linear voltage stabilizing circuit

A linear voltage regulator circuit, circuit technology, applied in the direction of regulating electrical variables, climate sustainability, high-efficiency power electronic conversion, etc., can solve problems such as runaway, and achieve the effect of improving power density and reducing loss

Active Publication Date: 2021-03-19
HEFEI TONGZHI ELECTRICAL CONTROL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the above-mentioned MOSFET control method, the maximum current and maximum voltage drop protection are independent of each other, and there is a risk of loss of control under the condition of too high temperature

Method used

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Embodiment Construction

[0028] In the following, the technical solution of the present invention will be described in detail through specific embodiments, and many specific details are set forth in the following description so as to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0029] As shown in Figures 1 to 10, a linear voltage regulator circuit proposed by the present invention includes MOSFET1, shunt 2, MCU detection control circuit 3 and MOSFET drive control circuit 4, the input terminal of MOSFET1 is connected to the input positive pole, and the output end is connected with the input end of the shunt 2, and the output end of the shunt 2 is connected to the output positive pole; the input...

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Abstract

The invention discloses a linear voltage stabilizing circuit, which comprises an MOSFET, a shunt, an MCU detection control circuit and an MOSFET driving control circuit. The input end of the MOSFET isconnected to an input positive electrode, the output end of the MOSFET is connected to the input end of the shunt, and the output end of the shunt is connected to an output positive electrode; the input end of the MCU detection control circuit is connected to the two ends of the shunt to detect voltage parameters at the two ends of the shunt, the output end of the MCU detection control circuit isconnected to the input end of the MOSFET driving control circuit to upload the voltage parameters to the MOSFET driving control circuit, and the input end of the MOSFET driving control circuit is connected with the two ends of the shunt. The MOSFET driving control circuit and the MOSFET are connected with each other so as to drive the working state of the MOSFET. According to the invention, the loss of the MOSFET is associated with a SOA safety zone, the risk of out-of-control under the condition of over-high temperature is reduced, and the power density of the circuit is improved at the sametime.

Description

technical field [0001] The invention relates to the technical field of electric control, in particular to a linear voltage stabilizing circuit. Background technique [0002] The power supply system generally consists of switching power supply and linear power supply. Compared with switching power supplies, linear power supplies have the advantage of lower output ripple noise, but there is a certain voltage difference between the input and output. When the input voltage is much greater than the output voltage, the disadvantage of linear power supplies is low efficiency. [0003] The linear power supply is mainly composed of power tubes, drive circuits and control loops. The power tube can be triode or MOSFET. The control of the triode circuit is relatively simple, but the minimum voltage difference is large, the working current and power dissipation are small, and it is suitable for low-power applications; the MOSFET working current and power dissipation are relatively large...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/56Y02B70/10
Inventor 曾世飞罗四平李杨叶方圆
Owner HEFEI TONGZHI ELECTRICAL CONTROL TECH
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