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Switching power converter built-in compensating circuit system

A technology of power converter and compensation circuit, applied in the direction of output power conversion device, electrical components, etc., can solve problems such as large effective area and occupation

Active Publication Date: 2015-09-23
CHINA RESOURCES MICROELECTRONICS (CHONGQING) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

No matter which method is used for frequency compensation, a large capacitance value is required to make the system have a better stable state, but it is very difficult to try to make a large capacitor with a large value in an integrated circuit (IC) on a silicon substrate. Difficult, it will take up a lot of effective area. In addition, there are some patents or other documents that do some tricks on the line to make the capacitance of the capacitor amplify to achieve frequency compensation.

Method used

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  • Switching power converter built-in compensating circuit system
  • Switching power converter built-in compensating circuit system
  • Switching power converter built-in compensating circuit system

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Embodiment Construction

[0033] exist Figure 2A In the illustrated embodiment of the operational amplifier, in a current source block 100, an ideal bias current source IB is provided, which flows through a P-type transistor M1 of the current source block 100, and the drain of the transistor M1 is connected to the gate Pole, reflecting the MOS diode structure, the current source module 100 also includes a P-type transistor M2 and an N-type transistor M13 connected in series, the sources of the transistors M1 and M2 are connected to the power supply voltage, but the MOS diode The source of the transistor M13 of the structure is connected to the ground terminal GND. The drain of the transistor M2 is connected to the drain of the transistor M13, and the currents flowing through the transistors M2 and M13 are exactly the same, and the gate of the transistor M2 is connected to the transistor M1 to form a current mirror structure, and the bias current IB is mirrored to the transistor M1. The mode in which ...

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Abstract

The invention mainly relates to power supply management, or rather a switching power converter built-in compensating circuit system provided with a high-precision operational amplifier and used for the power supply management. The switching power converter built-in compensating circuit system comprises the operational amplifier. The operational amplifier comprises a differential input stage used for comparing two input voltage signals INN and INP; a buffer used for converting and outputting two output signals of the differential input stage in a source electrode following manner; and an intermediate stage difference module used for generating a single-edge differential output signal after receiving the two source electrode following signals output by the buffer.

Description

technical field [0001] The present invention mainly relates to power management, more precisely, it designs a built-in compensation circuit system of a switching power converter with a high-precision operational amplifier for power management. Background technique [0002] In a conventional power management system, a switching power converter is usually a closed-loop system. The general structure includes at least one inductor L and an output capacitor C. Double poles (Pole) must be generated in this LC loop. If the frequency If the compensation is good, the system will be unstable, and most of the frequency compensation is realized by the operational amplifier (OPA). like Figure 1A It shows a DC-DC step-down converter system. Common frequency compensation methods include Type I, Type II and Type III. For the compensation networks of the three types of DC-DC, please refer to the Chinese patent application number 201310208472.1 Application. No matter which method is used f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M1/08
Inventor 陈政佑
Owner CHINA RESOURCES MICROELECTRONICS (CHONGQING) CO LTD