Boost converter capable of improving output stability
A boost converter, a technology with stable output, applied in output power conversion devices, high-efficiency power electronic conversion, conversion of DC power input to DC power output, etc., can solve the sub-harmonic oscillation of the boost converter, output stability drop etc.
Active Publication Date: 2022-01-04
ACER INC
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Problems solved by technology
However, when the duty cycle of the power switcher is greater than 50%, the boost converter is prone to sub-harmonic oscillation and degrades the overall output stability
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[0066] In order to make the purpose, features and advantages of the present invention more comprehensible, the specific embodiments of the present invention are listed below, together with the accompanying drawings, and are described in detail as follows.
[0067] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The words "comprising" and "comprising" mentioned throughout the specification and claims are open-ended terms, so they should be interpreted as "including but not limited to". The term "approximately" means that within an acceptable error range, those skilled in the art can solve the technical problem within a certain error ra...
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A boost converter capable of improving output stability comprises a transformer, a detection circuit, a first resistor, a power switcher, an output stage circuit, a feedback compensation circuit, a controller, an inverter and a multiplier. The transformer comprises a primary coil and a secondary coil. The main coil can be used for receiving an input potential. The detection circuit is coupled to the secondary coil. The detection circuit can be used for generating a detection potential. The first resistor is coupled to the main coil. The output stage circuit can be used for generating an output potential. The feedback compensation circuit can generate a feedback potential according to the output potential. The inverter can generate an inverted oscillation potential. The multiplier can generate a compensation potential difference according to the detection potential, the inverted oscillation potential and the feedback potential, wherein the compensation potential difference is applied to the first resistor.
Description
technical field [0001] The invention relates to a boost converter, in particular to a boost converter capable of improving output stability. Background technique [0002] Conventional boost converters typically use current mode control. However, when the duty cycle of the power switcher is greater than 50%, the boost converter is prone to sub-harmonic oscillation and causes overall output stability degradation. In view of this, it is necessary to propose a new solution to overcome the difficulties faced by the existing technologies. Contents of the invention [0003] In a preferred embodiment, the present invention proposes a boost converter with improved output stability, comprising: a transformer including a primary coil and a secondary coil, wherein the primary coil is used to receive an input potential; a detection circuit, coupled to the secondary coil, wherein the detection circuit is used to generate a detection potential; a first resistor, coupled to the main coi...
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IPC IPC(8): H02M3/335
CPCH02M3/33507H02M3/33523H02M3/156H02M3/1552H02M1/12H02M1/08H02M1/0038H02M1/0025H02M1/4225
Inventor 詹子增
Owner ACER INC