Switching power supply circuit, and method and apparatus for debugging switching power supply circuit

A switching power supply circuit and switching power supply technology, applied in the field of communication, can solve the problem of low efficiency of switching node amplitude, achieve the effect of improving debugging efficiency and avoiding manual removal

Active Publication Date: 2016-11-09
VIVO MOBILE COMM CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0012] The purpose of the present invention is to provide a switching power supply circuit, a method and device for debugging the switching power supply circuit, whic

Method used

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  • Switching power supply circuit, and method and apparatus for debugging switching power supply circuit
  • Switching power supply circuit, and method and apparatus for debugging switching power supply circuit
  • Switching power supply circuit, and method and apparatus for debugging switching power supply circuit

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no. 1 example

[0032] Such as figure 2 As shown, the first embodiment of the present invention provides a switching power supply circuit, including:

[0033] The main circuit of the switching power supply, the main circuit of the switching power supply includes a switching node; SW; such as figure 2 As shown, the main circuit of the switching power supply includes: an input power supply 100, which is used to supply power to the switching power supply circuit and peripheral circuits; an input capacitor 101, which is used to filter the input power supply 100; an inductor 103, an inductor 103 It is used to store current for the switching power supply circuit; the first switching tube 105 and the second switching tube 106 realize the voltage boost by adjusting the conduction time of the first switching tube 105 and the second switching tube 106; the switching node 104, the switch The node 104 is the node connecting the inductor 103 and the first switching tube 105 and the second switching tub...

no. 2 example

[0039] Such as image 3 As shown, the second embodiment of the present invention provides a method for debugging the switching power supply circuit as described above, the method comprising:

[0040] Step 301, detecting the moment when the switching power supply circuit is started, the instantaneous amplitude value of the switching node of the switching power supply circuit; figure 2As shown, the main circuit of the switching power supply includes: an input power supply 100, which is used to supply power to the switching power supply circuit and peripheral circuits; an input capacitor 101, which is used to filter the input power supply 100; an inductor 103, an inductor 103 It is used to store current for the switching power supply circuit; the first switching tube 105 and the second switching tube 106 realize the voltage boost by adjusting the conduction time of the first switching tube 105 and the second switching tube 106; the switching node 104, the switch The node 104 is...

no. 3 example

[0068] Such as Figure 5 As shown, the third embodiment of the present invention provides a device for debugging the above-mentioned switching power supply circuit, the device includes:

[0069] The detection module 501 is used to detect the instantaneous amplitude value of the switching node of the switching power supply circuit at the moment when the switching power supply circuit is started;

[0070] The adjustment module 502 is configured to adjust the resistance value of the resistor network connected to the damping circuit and / or adjust the capacitor network connected to the switch node according to the instantaneous amplitude value of the switch node when the main circuit of the switching power supply is started. Capacitance value in the above damping circuit.

[0071] Specifically, the detection module 501 in the third embodiment of the present invention includes:

[0072] The detection sub-module is used to detect the instantaneous amplitude value of the switching n...

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Abstract

The invention provides a switching power supply circuit, and a method and an apparatus for debugging the switching power supply circuit. The switching power supply circuit comprises a switching power supply main circuit and a damping circuit, wherein the switching power supply main circuit comprises a switching node; the damping circuit is connected between the switching node and the ground; and the damping circuit comprises a resistance network which is formed by multiple resistors, and a capacitance network which is formed by multiple capacitors, wherein the resistance value connected to the damping circuit can be adjusted by adjusting the resistance network while the capacitance value connected to the damping circuit can be adjusted by adjusting the capacitance network. By adoption of the internal structure of the improved switching power supply circuit provided by the embodiments, the adjustment of the overshoot amplitude of the switching node is realized; and the design and debugging difficulty and the area of the external circuit are reduced.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a switching power supply circuit, a method and a device for debugging the switching power supply circuit. Background technique [0002] Switching power supply is widely used in mobile phone circuit design due to its high efficiency and large output current. In addition to the platform's own DC power supply DCDC, external functional modules also require independent DCDC power supply. For example, the backlight driver circuit (backlight driver IC) that supplies power to the backlight of the screen, the LCM (liquid crystal display module) bias power driver IC, and the charging IC that charges the battery, etc. [0003] However, due to the switching characteristics of the switching power supply, the characteristics of the inductors used, and the limitations of the mobile phone board area and wiring, there are often some signal quality problems. For example, at the moment of D...

Claims

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Application Information

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IPC IPC(8): H02M3/156G01R31/28
CPCG01R31/282H02M3/1563
Inventor 李德健
Owner VIVO MOBILE COMM CO LTD
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