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A single-chip wide-voltage synchronous dual-channel active clamp control method and circuit

A control circuit, wide voltage technology, applied in the direction of high-efficiency power electronic conversion, electrical components, climate sustainability, etc., can solve problems such as increasing the complexity of circuit structure

Active Publication Date: 2018-05-01
连云港杰瑞电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Compared with the ordinary hard switching mode, it requires a pair of driving signals with overlapping time, which realizes the soft switching mode on the one hand, but on the other hand, because it requires additional logic function circuits, the circuit is increased the complexity of the structure

Method used

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  • A single-chip wide-voltage synchronous dual-channel active clamp control method and circuit
  • A single-chip wide-voltage synchronous dual-channel active clamp control method and circuit
  • A single-chip wide-voltage synchronous dual-channel active clamp control method and circuit

Examples

Experimental program
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Effect test

Embodiment 1

[0079] Example 1. refer to figure 1 , a single-chip wide-voltage synchronous dual-channel active clamp control method, using BCD integrated circuit processing technology with a withstand voltage of more than 100V, and coarse-fine dual-voltage stabilization technology, can realize wide-voltage input of 12V~100V, 7V ~8V voltage output. Using clock synchronization technology, it can realize the parallel use of multiple chips and the hot backup function of multiple power supplies. Dual-clock technology and dual-channel PWM square wave generation circuit are used to realize dual-channel PWM control. The overlapping square wave generation technology is used to realize the soft switching control of the active clamp voltage conversion circuit. Adopt temperature compensation technology to realize low temperature drift reference voltage output. Undervoltage and overcurrent sampling technology is adopted to realize the protection of undervoltage and overcurrent phenomena in the circu...

Embodiment 2

[0080] Example 2. refer to figure 2 , the single-chip wide voltage synchronous dual-channel active clamp control method described in embodiment 1 adopts the BCD integrated circuit processing technology with a withstand voltage of more than 100V, and integrates all functional circuits on one chip, which can realize the pairing of output ports The active clamp conversion circuit directly drives and controls, without adding other active clamp control circuits to the external circuit. Coarse and fine dual voltage stabilization technology is used to first perform rough voltage regulation on the input high voltage to obtain a preliminary stable low voltage, and then perform precise voltage regulation on the low voltage to obtain a relatively accurate internal power supply voltage. It can realize a wide voltage input of 12V~100V and a voltage output of 7V~8V.

Embodiment 3

[0081] Example 3. refer to Figure 4 , Figure 5 , Figure 8 , Figure 9 , Figure 10 , Embodiment 1 or 2 A wide-voltage synchronous dual-channel active clamp control method for a single chip, using a synchronizable clock technology, and synchronizing the internal clocks of multiple chips through an external clock signal, which can realize the parallel use of multiple chips And multi-power hot backup function. Dual clock technology is adopted to generate dual clocks, combined with dual PWM square wave generation circuits, the PWM control of dual conversion circuits can be realized. The overlapping square wave generation technology is used to generate the driving square wave with overlapping time, combined with the dual-channel PWM square-wave generating circuit, the soft switching control of the dual-channel active clamp voltage conversion circuit can be realized.

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Abstract

The invention is a single-chip wide-voltage synchronous dual-channel active clamping control method, which adopts the BCD integrated circuit processing technology with a withstand voltage of more than 100V, and the coarse and fine double voltage stabilization technology, and can realize wide voltage input of 12V~100V , 7V~8V voltage output; using clock synchronization technology to realize the parallel use of multiple chips and the function of multiple power supply hot backup. Dual-clock technology and dual-channel PWM square wave generation circuit are used to realize dual-channel PWM control. The invention also discloses a single-chip wide voltage synchronous dual-channel active clamping control circuit, which consists of a wide-voltage conversion circuit, a synchronous dual-clock oscillator circuit, a dual-channel PWM square wave generation circuit, and a dual-channel active clamping circuit. It is composed of drive circuit, reference circuit and protection circuit. The invention has the characteristics of high integration, wide input voltage, synchronous clock, dual control, active clamp drive output, integrated protection function and the like.

Description

technical field [0001] The invention belongs to the field of application-specific integrated circuit design (ASIC), and relates to a single-chip wide-voltage synchronous dual-channel active clamping control method. Through the processing of the feedback signal of the external circuit, the output of the dual-channel active clamp soft switch control signal is realized, which is applied to a direct current to direct current voltage conversion circuit; the invention also relates to a circuit for realizing the method. Background technique [0002] In the DC to DC voltage conversion circuit, the current common conversion methods include linear conversion and switching conversion. Compared with the linear conversion method, the switch conversion method is widely used because of its own advantages such as low power consumption, high conversion efficiency, and small size. [0003] According to the different switching methods, it can be divided into two types: hard switching and soft...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M1/00
CPCH02M1/00H02M1/0006H02M1/0058Y02B70/10
Inventor 徐严陈大科杨波罗佳亮
Owner 连云港杰瑞电子有限公司
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