Digitally-controlled power converter
A technology of power converter and digital control, which is applied in the direction of converting irreversible AC power input into DC power output, etc., which can solve the problems of high cost and reduced reliability of power converters, and achieve lower power supply costs, lower material costs, and lower cost effect
Inactive Publication Date: 2014-04-09
TEN PAO ELECTRONICS HUIZHOU
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Problems solved by technology
The disadvantage of this feedback mode is that it requires a high-voltage adjustable constant current source. Therefore, the packaging of the control circuit needs to use a high-voltage process, which is costly and reduces the reliability of the power converter.
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[0019] In order to facilitate the understanding of those skilled in the art, the technical solution of the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.
[0020] Detailed exemplary embodiments are disclosed herein. However, specific structural and functional details disclosed herein are for purposes of describing example embodiments only. Example embodiments may, however, be embodied in many alternate forms and should not be construed as limited to only the example embodiments set forth herein.
[0021] It should be understood, however, that there is no limitation to the particular exemplary embodiments disclosed, but on the contrary, exemplary embodiments are to cover all modifications, equivalents, and alternatives falling within the scope of the present disclosure. Like numbers refer to like elements throughout the description of the figures.
[0022] It will be understood that although the ...
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The invention relates to a digitally-controlled power converter. The digitally-controlled power converter comprises a rectifying filter circuit, a power circuit, a digital control and drive circuit, a voltage regulating circuit, a resistor R14, a resistor R15, a resistor R16, a resistor R17, a transformer, a switch and a resistor R32. The output end of the rectifying filter circuit is electrically connected with the input end of a primary winding of the transformer. After being sequentially connected with the switch and the resistor R32 in series, the output end of the primary winding of the transformer is electrically connected with the ground GND. The digital control and drive circuit transmits a drive signal from the drive output end to the switch. By the adoption of the control circuit of the digitally-controlled power converter, an auxiliary power supply winding of the power converter is omitted, a photoelectric coupler which is used for outputting error signals in an isolated transmission mode between the primary level and the second level of a power converter is omitted, as a result, the technology of the transformer is simplified, the manufacturability and the reliability are improved, the number of components, relevant to safety, of a power source is reduced, the safety is improved, and the cost of the power source is reduced.
Description
technical field [0001] The invention relates to the technical field of electronic circuit control, in particular to a power converter. Background technique [0002] At present, there are three known error signal feedback modes for power converters to control output voltage stability: [0003] The first feedback mode is well known to use a photocoupler to transmit the error negative feedback signal between the primary and secondary of the power converter. The disadvantage is that the secondary of the power converter needs another error amplifier circuit and auxiliary power supply circuit to convert the output voltage error The signal is transmitted to the primary control circuit of the power converter through the optocoupler to change the duty cycle of the switch, thereby stabilizing the output voltage, resulting in a complex circuit of the power converter and high cost, and the optocoupler has limitations on withstand voltage and creepage distance, which is harmful to human ...
Claims
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IPC IPC(8): H02M7/12
Inventor 朱昌亚汤能文洪光岱
Owner TEN PAO ELECTRONICS HUIZHOU