A DC/DC communication switch power

A switching power supply, main switch technology, used in electrical components, regulating electrical variables, control/regulating systems, etc.

Inactive Publication Date: 2007-10-17
SHANGHAI XINFENG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is difficult for the existing switching power supply to achieve the goal effectively with

Method used

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  • A DC/DC communication switch power
  • A DC/DC communication switch power

Examples

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Embodiment Construction

[0021] As shown in the figure, it includes EMC suppression circuit 1 installed on the printed board, self-starting control circuit 2, +5 volt main switch circuit 3, +5 volt PWM circuit 4, -5 volt voltage stabilization filter circuit 5, + 5 volt filter loop 6, +5 volt feedback loop 7, auxiliary power supply 8, protection loop 9, -42 volt PWM loop 10, -42 volt feedback loop 11, -42 volt switch loop 12 and -42 volt filter loop 13; :

[0022] The output end of described EMC suppression loop 1 is connected with self-starting control loop 2, +5 volt main switch loop 3,-42 volt switch loop 12 respectively;

[0023] The output end of the self-starting control circuit 2 is connected with the auxiliary power supply 8, and the auxiliary power supply 8 is controlled to provide auxiliary power supply when starting up and failing. The input ends of the PWM circuit 10 are connected;

[0024] The +5 volt main switching circuit 3 includes a high-frequency transformer T1, a switching tube, th...

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Abstract

The present invention provides a DC/DC communication switch power supply including an EMC restraint loop, a self-start control loop, a +5 voltage main switch loop, a +5 voltage PWM loop, a -5 voltage regulation filtering loop, a +5 voltage filtering loop, a +5 voltage feedback loop, an auxiliary power supply, a protection loop, a -42 voltage PWM loop, a -42 voltage feedback loop, a -42 voltage switch loop and a -42 voltage filtering loop which are positioned on the printed plate; the +5 voltage PWM loop and the -42 voltage PWM loop adopt the automatic control DC/DC converting circuit of the single-terminal normal-shock PWM integrated circuit chip. Said printed plate adopts copper foil lead having a thickness of 0.7MM, and more than 90% of the whole board is covered with the copper foil. Each circuit includes a switch transformer and the heating elements including MOS tube are all positioned on the top of the printed plate; the radiators and transformers of each circuit are distributed in parallel with gap therebetween to generate air flow tunnel effect. The DC/DC communication switch power supply has a high transforming efficiency and a low heat self-productivity.

Description

technical field [0001] The invention relates to DC power supply equipment, in particular to a DC / DC communication switching power supply. Background technique [0002] In the field of communication, the quality of the power supply is very high, especially for the professional DC-DC conversion switching power supply, which requires high conversion efficiency and low heat generation of the circuit itself. It is difficult for the existing switching power supply to achieve the goal effectively with a simple and appropriate solution in these aspects, and maintain an excellent cost performance. For example, in some communication power supplies, the full-load output power of the power supply is required to be as high as 313W, one of which outputs -5V, 30A low-voltage high-current, and the full-load efficiency is required to be ≥ 87%. There are extremely strict requirements on temperature rise, not only the overall temperature rise but also the temperature and distribution of high-...

Claims

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Application Information

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IPC IPC(8): H02M3/00
Inventor 沈平康
Owner SHANGHAI XINFENG ELECTRONICS
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