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Voltage regulation control method

A technology of voltage regulation control and signal control, applied in control/regulation systems, instruments, regulating electrical variables, etc., can solve problems such as the difficulty of matching calculation designers

Active Publication Date: 2017-10-27
ALPHA & OMEGA SEMICON CAYMAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the calculation of matching is quite difficult for the designer

Method used

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Embodiment Construction

[0030]Please refer to Fig. 2, the switching control device of the present invention includes a first electronic switch 28 and a second electronic switch 30, which are all exemplified by field effect transistors, and insulated gate bipolar transistors (Insulated Gate Bipolar Transistors) can also be used , IGBT) or bipolar junction transistor (Bipolar Junction Transistor, BJT) is implemented as an example, but not limited thereto. The first electronic switch 28 is connected to the input voltage source 31 , a comparison controller 32 and the second electronic switch 30 . The second electronic switch 30 is grounded (for example, the source is grounded), and is connected to a comparison controller 32 . The comparison controller 32 is connected to a target voltage generator 34 . The first electronic switch 28 and the second electronic switch 30 are connected to one end of a load 38 through an inductor 36. For example, the inductor 36 can be connected to the coupling node between t...

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Abstract

The invention discloses a voltage stabilization control method. Firstly, the load voltage on a load is divided to generate a feedback voltage. Then, receiving the feedback voltage and a periodic triangular wave signal with positive and negative voltages, and adding the feedback voltage and the triangular wave signal to generate a sum signal. After that, compare the sum signal with a target voltage, and generate a control signal capable of controlling the electronic switch to switch when the sum signal is less than the target voltage. Finally, the electronic switch receives the control signal, and uses an input voltage to update the load voltage accordingly, so as to avoid load voltage instability when the load is transient or steady state.

Description

technical field [0001] The invention relates to a control method in a power management system, in particular to a control method for voltage stabilization. Background technique [0002] The adjustment of the power supply of the integrated circuit is designed by using the high-side FET and the low-side FET as the voltage and current control circuit. The current flows from the junction or node where the source of the upper boundary field effect transistor and the drain of the lower boundary field effect transistor are connected to the load. The load is connected in series with the inductor, and a capacitor is connected in parallel with the load. When the cycle starts, the upper boundary field effect transistor is turned on, and the lower boundary field effect transistor is turned off, and the current flows to the inductor, the capacitor and the load through the turned on upper boundary field effect transistor. This current will increase the amount of charge stored in the cap...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/156
Inventor 黄广顺黄伟骐吴建兴
Owner ALPHA & OMEGA SEMICON CAYMAN