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Patent Searching and Data


Title:
POWER CONVERTER AND POWER SUPPLY SWITCHING DEVICE
Document Type and Number:
WIPO Patent Application WO/2017/004984
Kind Code:
A1
Abstract:
A power converter and a power supply switching device. The power converter comprises an energy storage output circuit (10) for supplying power for a load (RL) after storing energy, a main switch (K1) for providing input power for the energy storage output circuit when being switched on, a free-wheeling switch (K2) for providing a continuous current loop for the energy storage output circuit when the main switch is switched off, a drive circuit (20) for driving the main switch and the free-wheeling switch to be switched on in a switchover manner according to a preset clock frequency, a detection circuit (30) and a feedback circuit (40), the detection circuit being used for detecting the voltage on a connection node (LX) of the main switch and the free-wheeling switch so as to use the energy storage output circuit to provide working voltage for the load while enabling the current of the continuous current loop not to flow reversely; and accordingly, the circuit works in a frequency modulation mode during light load, thereby prolonging a switch-on/switch-off period of the main switch and the free-wheeling switch. By means of reducing the times of switch-on/switch-off of switches, a switching loss is reduced, and the utilization rate of a power supply is improved.

Inventors:
ZUO SHIJUN (CN)
CHEN LU (CN)
TENG MOUYAN (CN)
Application Number:
PCT/CN2016/072478
Publication Date:
January 12, 2017
Filing Date:
January 28, 2016
Export Citation:
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Assignee:
SHENZHEN SKYWORTH-RGB ELECTRONIC CO LTD (CN)
SHENZHEN SKYWORTH SEMICONDUCTOR DESIGN CENTER CO LTD (CN)
International Classes:
H02M3/156
Foreign References:
CN101667019A2010-03-10
JP2009225642A2009-10-01
CN105226943A2016-01-06
Attorney, Agent or Firm:
CENFO INTELLECTUAL PROPERTY AGENCY (CN)
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