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Circuit for output-driving rear defrosting load

An output drive and circuit technology, applied in transportation and packaging, lighting and heating equipment, heating/cooling equipment, etc., can solve problems such as high cost and circuit protection, and achieve the effect of preventing ESD static electricity and reducing circuit cost.

Active Publication Date: 2016-08-17
NINGBO PREH JOYSON AUTOMOTIVE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The car air conditioner will also be equipped with a defrosting system. The defrosting system is divided into a front defrosting load and a rear defrosting load. The rear defrosting load is generally heated by an electric heating wire to achieve the purpose of defrosting; but now the rear defrosting load is driven. The circuit needs to use a special intelligent high-side driver chip, the cost is too high, and it is impossible to protect the circuit when the circuit is short-circuited to the ground to prevent circuit damage

Method used

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  • Circuit for output-driving rear defrosting load
  • Circuit for output-driving rear defrosting load

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Embodiment Construction

[0010] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0011] See Figure 1 to Figure 2 , a circuit for output driving a rear defrosting load, characterized in that it includes a control circuit, a feedback circuit, a voltage sampling module, a port protection module, a field effect transistor M1, and a current limiting resistor R7, and the control circuit is connected to the field effect transistor M1 The gate of the field effect transistor M1 is connected to one end of the current limiting resistor R7, the drain of the field effect transistor M1 is connected to the feedback circuit, the voltage sampling module and the port protection module, and the feedback circuit is also connected to A control circuit and a voltage sampling module, the voltage sampling module is also connected to the port protection module; the field effect transistor M1 is a P channel enhancement type MOS field effect transis...

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Abstract

The invention aims to disclose a circuit for output-driving a rear defrosting load. The circuit performs the function of output-driving the rear defrosting load through a separate element, a special intelligent low-side driving chip for driving the rear defrosting load is not required, and the cost of the circuit is reduced; besides, a voltage sampling module is used for diagnosing a fault state, a feedback circuit is adopted to stop a field-effect tube from being conducted when a phenomenon of short circuit to the ground occurs, and the circuit can be protected when the phenomenon of short circuit to the ground occurs.

Description

technical field [0001] The invention relates to the field of electronic circuits, in particular to a circuit for outputting and driving a rear defrosting load. Background technique [0002] Automobile air conditioner is a kind of automobile air conditioning device, which is used to adjust and control the temperature, humidity, air cleanliness and air flow in the automobile compartment to the best state, provide a comfortable riding environment for the passengers, and reduce travel fatigue; It provides a good working adjustment and plays an important role in ensuring safe driving. The ventilation device generally includes a cooling device, a heating device and a ventilation device. It is an internationally popular modern automotive air conditioning system. [0003] The car air conditioner will also be equipped with a defrosting system. The defrosting system is divided into a front defrosting load and a rear defrosting load. The rear defrosting load is generally heated by an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60H1/00F25B49/00
CPCB60H1/00921B60H1/00978B60H2001/00128F25B49/00F25B2500/06
Inventor 陈建勇
Owner NINGBO PREH JOYSON AUTOMOTIVE ELECTRONICS