Electrical power control unit of switch mode power supply feeding device
A technology of switching mode power supply and power control device, which is applied in the direction of conversion equipment without intermediate conversion to AC, which can solve the problems that cannot be turned off and the switch IC cannot be completely turned off, and achieve the effect of reducing power consumption
Inactive Publication Date: 2007-12-26
LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI
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Problems solved by technology
[0006] However, Drain Start switch ICs have a built-in Start-Up Cell connected to the Drain Pin of the FET. Even if the Vcc terminal is cut off, the 1 The drain terminal connected to the DC connection terminal on the secondary side can also be restarted, but cannot be completely shut down, and continues to oscillate intermittently, so there is a problem that the switch IC cannot be completely shut down
Method used
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[0020] Next, an embodiment of the power control device of the switching mode power supply device of the present invention having the above-mentioned configuration will be described in detail with reference to the drawings.
[0021] That is, FIG. 1 is a configuration diagram of a power supply device applied to a power control device of a switching mode power supply device of the present invention.
[0022] As shown in Figure 1, the power supply device of the present invention is made up of the following parts: AC power input device 10, voltage stabilizing device 12, main switching device 14, main transformer 16, feedback device 18, sub-switching device 20, sub-transformer 22 , load 24, feedback device 26, microprocessor 28 and control switch 30.
[0023] The AC power input device 10 converts the AC power input from the outside into a DC power supply, and the voltage stabilizing device 12 stabilizes the voltage of the converted DC power to remove the pulsating part of the power ...
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Electrical power control unit (EPCU) of power supplier in switch mode (PSSM) is suitable for PSSM of power supplier of domestic electric appliance to cut off switching IC power supply completely in order to reduce power consumption. EPCU includes following parts: being in leaking starting mode by built in start-up battery, sub-switching device of PSSM is in use for carrying out on off control for power supply of transformer, which provides DC for load; in standby mode, the control switch is in use for cutting off power supply for sub-switching device of PSSM; current distribution assembly (CDA) is in use for cutting off electrical source provided by start-up battery for sub-switching device of PSSM under stand by mode, CDA is contained in power supplier composed of the above two parts. When power supplier is in standby mode, the invention can reduce power consumption effectively.
Description
technical field [0001] The present invention relates to power control devices for switch mode power supply devices. In particular, it relates to a power control device for a switching mode power supply device (Switching Mode Power Supply; SMPS) suitable for use in a power supply device for home appliances, in order to reduce power consumption in order to completely cut off the switching IC power supply. . Background technique [0002] Generally speaking, TVs, audio playback equipment, DVD players (DVD Players), refrigerators, washing machines and other home appliances are powered by power supply devices to run all functions of the equipment. In order to provide more stable power, they all have Power supply for Switch Mode Power Supply (SMPS). [0003] This power supply device can transform the alternating current (AC) input power and convert it into direct current (DC) power. Under the control, the required power can be provided to the load of the related equipment. [0...
Claims
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IPC IPC(8): H02M3/20
Inventor 李基培朴规玄
Owner LEJIN GUANGDIAN ELECTRONIC CO LTD SHANGHAI