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An Adaptive Temperature Protection Circuit

A temperature protection circuit and self-adaptive technology, applied in temperature control, electrical components, non-electric variable control, etc., can solve problems such as circuit failure and achieve the effect of reducing output current

Active Publication Date: 2019-08-13
SHENZHEN LOWPOWER SEMICON CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the load current is too large and the circuit is overheated, the integrated circuit is constantly switching between on and off, resulting in the circuit not working properly

Method used

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  • An Adaptive Temperature Protection Circuit

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Embodiment Construction

[0017] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0018] refer to figure 1 As shown, the present invention provides an adaptive temperature protection circuit, including a temperature adjustment unit 1, a current limiting protection unit 2, and a DC / DC conversion unit 3; the temperature adjustment unit 1 includes a current source Is1, a current source Is2, and a diode D1 The input end of the current source Is1 and the output end of the current source Is2 are electrically connected to the current limiting protection unit 2, and the output end of the current source Is1 is respectively electrically connected to the anode of the diode D1 and the input end of the current source Is2; The input terminal of the current source Is2 and the cathode of the diode D1 are grounded; the current limiting protection unit 2 is electrically connected with the DC / DC conversion unit 3 .

[0019] Wherein, the cur...

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PUM

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Abstract

The invention discloses an adaptive temperature protection circuit, which includes a temperature adjustment unit, a current limiting protection unit, and a DC / DC conversion unit; the temperature adjustment unit includes a current source Is1, a current source Is2, and a diode D1; the current source Is1 Both the input end and the output end of the current source Is2 are electrically connected to the current limiting protection unit, and the output end of the current source Is1 is respectively electrically connected to the anode of the diode D1 and the input end of the current source Is2; the input end of the current source Is2 . The cathode of the diode D1 is grounded; the current limiting protection unit is electrically connected to the DC / DC conversion unit. In the present invention, the current of the current limiting protection circuit is set by the temperature regulating unit. When the temperature is higher than the set value, the temperature adjustment unit is activated to reduce the set value of the current limiting protection unit and further reduce the output current, so that the temperature of the integrated circuit is adaptively stabilized within the set temperature range.

Description

technical field [0001] The invention relates to the technical field of DC / DC integrated circuits, in particular to an adaptive temperature protection circuit. Background technique [0002] A DC / DC integrated circuit refers to an integrated circuit that converts electrical energy of one voltage value into electrical energy of another voltage value in a DC circuit. Some protection functions are built into the integrated circuit, such as current limiting protection, overvoltage protection, overtemperature protection, short circuit protection and other functions. [0003] The over-temperature protection and current-limiting protection of the existing DC / DC integrated circuit are performed independently. There is a current limiting circuit inside the integrated circuit. When the load current is higher than a certain set value, the current limiting circuit starts, and the output current is clamped at this current. There is an over-temperature detection circuit inside the circuit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/32G05D23/20
CPCG05D23/20H02M1/32H02M1/327
Inventor 李茂登
Owner SHENZHEN LOWPOWER SEMICON CO LTD