Circuit device for input protection circuit of switching power supply, and switching power supply

A circuit device and switching power supply technology, applied in the field of circuit devices, can solve problems such as increased cost, and achieve the effects of compact design, small capacity, and low ohmic loss

Inactive Publication Date: 2019-04-02
BENDER SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0018] Thus, for example, the number of devices allocated by the manufacturer doubles, while increasing the costs of development, manufacturing, storage and dispatch

Method used

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  • Circuit device for input protection circuit of switching power supply, and switching power supply
  • Circuit device for input protection circuit of switching power supply, and switching power supply
  • Circuit device for input protection circuit of switching power supply, and switching power supply

Examples

Experimental program
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Effect test

Embodiment Construction

[0040] exist figure 1 In , a circuit arrangement 10 for an input protection circuit of a U1 power supply according to the prior art is shown.

[0041] The circuit arrangement 10 basically comprises four functional component groups, which can be shown as starting from the mains voltage U contacted on the input side n (input voltage of the circuit arrangement 10) to the circuit of successive signal processing steps.

[0042] On the input side, the surge protection circuit 12 is subjected to the mains voltage U n . The surge protection circuit 12 includes a rheostat R1, and if necessary, also includes a part of a variable resistor to attenuate the mains voltage U n transient surges in the

[0043] Adjacent to the surge protection circuit 12 is a current-compensating choke L1 as suppression component 14 , by means of which the transmission of high-frequency interference is largely suppressed.

[0044] In the next signal processing step, rectification takes place in the rectifie...

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PUM

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Abstract

The invention relates to a circuit device for an input protection circuit of a switching power supply and the switching power supply. The circuit device has a surge protection circuit which is in contact with supply voltage on the input side and a current compensation choke is used as a suppression component and is connected with the surge protection circuit. The current compensation choke is connected to a rectification circuit comprising an energy storage device on an output side. A circuit technology is modified, for example, two rheostats are used as surge protection, and by using a suitable switching element such as a silicon diode as a rectifying element and using a ceramic capacitor as the energy storage device, the input protection circuit is designed such that a requirement for anextended input voltage range of the surge circuit is satisfied. The switching power supply has the circuit device for an input protection circuit according to the invention.

Description

technical field [0001] The invention relates to a circuit arrangement for an input protection circuit of a switched-mode power supply, which circuit arrangement has a surge protection circuit which is contacted with the supply voltage on the input side and a current compensation choke is connected as a suppression component to the The surge protection circuit, the current compensated choke is connected to a rectification circuit including an energy storage device on the output side. [0002] Furthermore, the invention relates to a switched-mode power supply having a circuit arrangement according to the invention for an input protection circuit. Background technique [0003] To supply electrical power from an electrical power supply system (power supply grid) to electronic devices requiring a defined supply voltage, power supplies are used, in particular switched-mode power supplies. These power supplies transform the nominal mains voltage (also referred to below as mains vo...

Claims

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Application Information

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IPC IPC(8): H02M1/32H02H9/00
CPCH02H9/005H02M1/32H02H9/041H02M1/12H02M1/126H02M1/4208H02M1/44H02M7/062H02M7/066Y02B70/10H01C7/12H01F17/00H01F2017/0093H02H7/1252H02M1/123
Inventor 奥利弗·舍费尔
Owner BENDER SA
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