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Switching device with freewheel diode

A technology of freewheeling diodes and switching devices, which is applied in the direction of diodes, transistors, semiconductor/solid-state device components, etc., and can solve the problems of poor heat dissipation of freewheeling diodes, etc.

Active Publication Date: 2013-12-04
SHANGHAI BAICHENG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The main purpose of the present invention is to provide a switch device with a freewheeling diode to solve the problem of poor heat dissipation of the freewheeling diode in the prior art

Method used

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  • Switching device with freewheel diode
  • Switching device with freewheel diode
  • Switching device with freewheel diode

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Experimental program
Comparison scheme
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Embodiment 2

[0039] In Embodiment 2, the freewheeling diode 12 and the switch tube 13 use the same heat dissipation component 15. In order to achieve better heat dissipation performance, Embodiment 3 of the present invention has further improved Embodiment 2. Image 6 is a schematic diagram of a switching device with a freewheeling diode according to Embodiment 3 of the present invention, such as Image 6 As shown, the heat dissipation component 15 includes a first heat dissipation fin 151 and a second heat dissipation fin 152, and the first heat dissipation fin 151 and the second heat dissipation fin 152 sandwich the heat dissipation substrate 131, wherein the second heat dissipation fin 152 is located on the semiconductor of the switch tube 13 One side of the silicon chip 132 is arranged on the step formed between the semiconductor silicon chip 132 of the switch tube and the heat dissipation substrate 131 , and the anode of the freewheeling diode 12 is in contact with the second heat diss...

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Abstract

The invention provides a switching device with a freewheel diode. The switching device with the freewheel diode comprises a switching tube, and a heat dissipation substrate is arranged on a drain electrode of the switching tube. The switching device further comprises a heat dissipation component which is connected with the heat dissipation substrate of the switching tube in a contacting mode. The freewheel diode is a compression joint type diode, and the positive electrode end face of the freewheel diode is connected with the heat dissipation component in an abutting-against mode and electrically connected with the drain electrode of the switching tube through the heat dissipation component. Therefore, not only is the heat dissipation component used for achieving a heat dissipation function, but also electrical connection is achieved by the utilization of the conductivity of the heat dissipation component and the heat dissipation substrate.

Description

technical field [0001] The invention relates to the field of semiconductors, in particular to a switch device with a freewheeling diode. Background technique [0002] At present, freewheeling diodes are provided in the DC speed-regulating semiconductor switching devices to provide discharge channels for inductive loads such as motors when the switching devices are turned off. figure 1 is the circuit diagram of a semiconductor switching device with a freewheeling diode, such as figure 1 As shown, the negative pole of the freewheeling diode 12 should be connected to the positive input of the power supply 11, and the positive pole of the freewheeling diode 12 should be connected to the switching device 13, that is, the freewheeling diode 12 is connected in parallel to both ends of the inductive load 14. When the switching device 13 is turned off When , a discharge circuit is provided for the current of the inductive load 14 . Because the switching device and the freewheeling ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01L23/367H01L25/07
CPCH01L2224/32245H01L2924/1203H01L23/367H01L25/07H01L2924/13091H01L23/40H01L25/18H01L23/427H01L23/4006H01L27/0211H01L27/0255H01L27/0629H01L2023/4031H01L2023/405H01L2023/4081H01L2023/4087
Inventor 蔡颖杰
Owner SHANGHAI BAICHENG ELECTRONICS