Soft start circuit applied to voltage regulation circuit and control method thereof
A technology of voltage regulation circuit and soft start circuit, which is applied in the direction of electrical components, output power conversion devices, etc., and can solve the problems that the soft start time cannot be adjusted in real time, and the inrush current and timing cannot be balanced.
Pending Publication Date: 2019-08-09
INSPUR SUZHOU INTELLIGENT TECH CO LTD
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Problems solved by technology
[0005] The embodiment of the present invention provides a soft-start circuit and its control method applied to the voltage regulation circuit to solve the problems in the prior art that the soft-start time of the voltage regulation circuit cannot be adjusted in real time, and the surge current and timing cannot be balanced
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[0035] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific implementation modes and in conjunction with the accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, components and arrangements of specific examples are described below. Furthermore, the present invention may repeat reference numerals and / or letters in different instances. This repetition is for the purpose of simplicity and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. It should be noted that components illustrated in the figures are not necessarily drawn to scale. Descriptions of well-known components and processing techniques and processes are omitted herein to avoid unnecessarily limiting the...
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The embodiment of the invention discloses a soft start circuit applied to a voltage regulation circuit and a control method thereof. The soft start circuit comprises a boost drive circuit, a first capacitor, a second capacitor and a third capacitor, wherein the first capacitor, the second capacitor and the third capacitor are connected in parallel; the second capacitor is connected with a primarydetection change circuit, the primary detection change circuit is configured to detect the voltages of the input end and the output end of a voltage regulation circuit and control on-off of the firstcapacitor according to the detection result, the third capacitor is connected with a secondary detection change circuit which is used to detect the voltages of the input end and the output end of thevoltage regulation circuit and control the on-off of the third capacitor according to the detection result and the on-off condition of the second capacitor. The capacitors are connected in parallel, the detection change circuits for controlling the on-off are arranged, the switch-off of the capacitor is controlled in different conditions, and a surge current and a start sequence are considered toachieve the dynamic regulation of the output voltage.
Description
technical field [0001] The invention relates to the technical field of starting control of a voltage regulating circuit, in particular to a soft starting circuit applied to a voltage regulating circuit and a control method thereof. Background technique [0002] The voltage regulation circuit converts the input voltage according to different voltage requirements to obtain the corresponding output voltage. The voltage regulation circuit is prone to generate a surge circuit at the moment of the output voltage, which affects the safety of the circuit. [0003] Such as figure 1 As shown, the existing voltage regulation circuit directly connects a capacitor C to the SS pin of the chip, and realizes the control of the soft-start time according to the charging time caused by the size of the capacitor. The larger the capacitor, the longer the soft-start time. The actual situation solves the need for a long soft-start time to control the inrush current when it is turned on for a mome...
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IPC IPC(8): H02M1/36H02M1/32
CPCH02M1/36H02M1/32
Inventor 曹伟华
Owner INSPUR SUZHOU INTELLIGENT TECH CO LTD