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Power converter and switch control unit therein

A technology of switch control unit and power converter, which is applied to electrical components, control/regulation systems, and output power conversion devices, etc., can solve the problems of fixed circuit parameters of switch control unit 15, system instability, and different problems.

Active Publication Date: 2019-02-01
RICHTEK TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the case of different DC output voltages Vo, the compensation parameter values ​​required by the overall feedback control loop will be different, but the various circuit parameters inside the switch control unit 15 are fixed.
Therefore, for example, if the internal compensation parameters of the switch control unit 15 are designed for a DC output voltage of 19V, the system may become unstable when the DC output voltage is 5V, and vice versa

Method used

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  • Power converter and switch control unit therein
  • Power converter and switch control unit therein
  • Power converter and switch control unit therein

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Embodiment Construction

[0067] The aforementioned and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of a preferred embodiment with reference to the drawings. The directional terms mentioned in the following embodiments, such as: up, down, left, right, front or back, etc., are only directions referring to the attached drawings. The drawings in the present invention are all schematic, mainly intended to show the functional relationship between each device and each component, and the shapes, thicknesses and widths are not drawn to scale.

[0068] refer to figure 2 , which shows a power converter 20 according to an embodiment of the present invention for receiving a rectified voltage to generate a DC output voltage. The rectification unit 11 is coupled to the AC input voltage, and generates an input side voltage Vp after rectifying the AC input voltage. The power converter 20 includes an isolated transformer unit...

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Abstract

A power converter uses a switch control unit to control an isolated transformer unit to generate a DC output voltage. The target value of the DC output voltage can be changed according to different settings of the target setting signal. The switch control unit internally provides a reference voltage and the switch control unit includes a feedback contact and a variable resistor. The feedback contact is used to receive a feedback signal related to the DC output voltage. The feedback contact passes through the variable resistor. The resistor is coupled to the reference voltage. The resistance value of the variable resistor is adjusted according to the difference of the DC output voltage, so as to provide different compensations under the condition of different DC output voltages. In addition, the invention also proposes a switch control unit of a power converter.

Description

technical field [0001] The invention relates to a power converter, in particular to a power converter that provides different compensations for different DC output voltages by adjusting the resistance value of one of the variable resistors. Background technique [0002] refer to figure 1 , which shows a conventionally designed power converter 10 connected between an AC input voltage and a DC output voltage Vo, which includes: a rectification unit 11 coupled to the AC input voltage to convert the AC input voltage into a rectifier The final voltage is used as the input-side voltage Vp; an isolated transformer unit 12 has an input-side coil 121 and an output-side coil 122, and the isolated transformer unit 12 is coupled to the input-side coil 121 according to the input-side voltage Vp , an output side voltage Vs is generated at the output side coil 122, and the output side voltage Vs is coupled to and used to generate a DC output voltage Vo; a switch 13 is coupled to the input...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/335H02M1/08
CPCH02M1/08H02M3/335H02M1/0003
Inventor 林昆馀
Owner RICHTEK TECH