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Power converter based on dynamic zero compensation circuit

A technology of power converter and dynamic zero point, which is applied in the direction of adjusting electric variable, converting device of output power, converting DC power input to DC power output, etc. It can solve problems such as failure to meet requirements, achieve high practical value, and maintain transient state response, the effect of fast transient response

Active Publication Date: 2020-12-18
SHENZHEN INJOINIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] To sum up, compensating the output pole that changes in a wide range makes the loop stable in the full load range, has sufficient bandwidth, and the compensation circuit can be integrated into the chip. The traditional compensation method can no longer meet the requirements. Therefore, it is necessary to find a A new compensation scheme

Method used

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  • Power converter based on dynamic zero compensation circuit
  • Power converter based on dynamic zero compensation circuit
  • Power converter based on dynamic zero compensation circuit

Examples

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Embodiment 1

[0057] Specifically, see Figure 5 , the dynamic zero compensation circuit 10 includes an operational amplifier OP1, an operational amplifier OP2, a field effect transistor MN1, a field effect transistor MN2, a field effect transistor MN3, a field effect transistor MN4, a field effect transistor MP1, a field effect transistor MP2, a resistor RM, and a resistor RN , the non-inverting input terminal of the operational amplifier OP1 is connected to the signal Isense, the inverting input terminal of the operational amplifier OP1 is connected to the signal VFB, the output terminal of the operational amplifier OP1 is connected to one end of the resistor RM, the gate of the field effect transistor MN4, and the field effect transistor The gate of MN1 is connected to the other end of the resistor RM and the drain of the field effect transistor MN2, the gate of the field effect transistor MN2 is connected to the gate of the field effect transistor MN3, the gate of the field effect transi...

Embodiment 2

[0078] see Figure 6 , the present embodiment provides another dynamic zero point compensation circuit 10, the dynamic zero point compensation circuit 10 of the present embodiment includes an operational amplifier OP1, an operational amplifier OP2, an operational amplifier OP3, an operational amplifier OP4, a field effect transistor MP1, and a field effect transistor MP2 , FET MP3, FET MP4, FET MN1, FET MN4, resistor RM, resistor RN, resistor RP, the non-inverting input terminal of the operational amplifier OP1 is connected to the signal Isense, and the inverting input terminal of the operational amplifier OP1 The signal VFB is connected, the gate of the field effect transistor MN1 is connected to the output terminal of the operational amplifier OP1 and the non-inverting input terminal of the operational amplifier OP2, and the output terminal of the operational amplifier OP2 is connected to the gate of the field effect transistor MP1 and the gate of the field effect transistor ...

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Abstract

The invention provides a power converter based on a dynamic zero compensation circuit, and the power converter comprises a voltage input end and a voltage output end and has a main power transmissionfunction A(x) and a compensation network B (x). An output pole generated by output voltage V0 is calculated according to the main power transmission function A (x), and the output pole is compensatedthrough a zero point of the compensation network B(x); a dynamic zero point compensation circuit is connected between the compensation network B (x) and the voltage output end, wherein the input of the dynamic zero point compensation circuit is a proportional value of the output current I0 and the output voltage V0, a load equal-proportion resistor is output, dynamic zero point tracking is generated, and an output pole of the power converter is compensated. By sampling the output current and the output voltage and utilizing the linear on-resistance of the MOS working in the linear region, theequal-proportion load resistance is realized, and the fixed resistance in the conventional compensation is replaced by the equal-proportion load resistance, so the self-adaptive dynamic zero compensation is realized.

Description

technical field [0001] The invention relates to the technical field of power converters, in particular to a power converter based on a dynamic zero point compensation circuit. Background technique [0002] With the rapid development of electronic technology, the diversification of products makes the demand for power converters different. The load of power converters needs to have a large range of changes, and the output voltage is required to be sufficiently stable during the process of load changes. Such as figure 1 as shown, figure 1 It is a schematic circuit diagram of a common power converter architecture in the prior art. Among them, Vin is the input voltage, A(x) is the main power transfer function, B(x) is the feedback transfer function, Co is the output capacitor, and Ro is the output load. The working principle is: the input voltage Vin is processed by a converter (such as a linear converter LDO, a switching converter DCDC) to obtain an output voltage. Since the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02M3/155
CPCH02M3/155H02M1/0016
Inventor 张亮
Owner SHENZHEN INJOINIC TECH
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