Current detection circuit and current loop control circuit including the current detection circuit

A current detection circuit and control circuit technology, applied in the direction of measuring current/voltage, control/regulation system, high-efficiency power electronic conversion, etc., can solve the problem of DC-DC output current reduction, reduce circuit power consumption, avoid excessive The effect of compensating for problems and improving accuracy

A current detection circuit and control circuit technology, applied in the direction of measuring current/voltage, control/regulation system, high-efficiency power electronic conversion, etc., can solve the problem of DC-DC output current reduction, reduce circuit power consumption, avoid excessive The effect of compensating for problems and improving accuracy

CN104300792BActive Publication Date: 2017-10-03SHANGHAI HUALI MICROELECTRONICS CORP
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  • Current detection circuit and current loop control circuit including the current detection circuit
  • Current detection circuit and current loop control circuit including the current detection circuit
  • Current detection circuit and current loop control circuit including the current detection circuit

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Experimental program
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Embodiment Construction

[0047] The specific embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0048] figure 2 It is a schematic circuit structure diagram of an embodiment of a current detection circuit of the present invention; as figure 2 As shown, a current detection circuit includes a power supply VDD, the power supply VDD is respectively connected with the switch tube (NMOS tube) MP, the first current detection tube (NMOS tube) MS1, the sixth transistor (NMOS tube) M6 and the seventh transistor (NMOS tube) The source terminal (source) of M7 is connected, the switch control terminal Vp is respectively connected with the control terminal (gate) of the switch tube MP, the first current detection tube MS1 and the second current detection tube MS2, and the current output terminal SW They are respectively connected to the drain end (drain) of the switch tube MP, the rectifier tube (PMOS tube) MN, the second current detection tube MS2 and th...

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Abstract

The invention relates to the field of CMOS integrated circuit design, in particular to a current detection circuit and a current loop control circuit including the current detection circuit. By setting a parallel MOS tube current detection circuit and a series resistance current detection circuit, the accuracy of current detection can be improved. At the same time, the power consumption of the circuit is reduced, and the use of the adaptive slope compensation circuit can further avoid the problem of overcompensation, and the detection signal and compensation signal in this circuit can be directly added, which is convenient for the design of the current mode DC-DC circuit .

Description

technical field [0001] The invention relates to the field of CMOS integrated circuit design, in particular to a current detection circuit and a current loop control circuit including the current detection circuit. Background technique [0002] Since the current mode DC-DC (direct current) converter (converter) adds a current loop control circuit to the voltage mode DC-DC converter, it can achieve stability compensation more easily, and then compared to the voltage mode DC - DC converters are more widely used. [0003] Among them, the main function of the current loop control circuit in the current mode DC-DC converter is to detect the magnitude of the output current, and quickly feed back the detection results (such as the detected current value, etc.) to the pulse width in the DC-DC circuit. Comparator, and quickly adjust the output of the DC-DC circuit according to the output of the comparator to form a detection-comparison-adjustment current loop, thereby ensuring the st...

Claims

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Application Information

Patent Timeline
03 Oct 2017
Publication
CN104300792B
IPC
H02M3/335; G01R19/00
CPC
H02M3/156; H02M1/0009; H02M1/0029; H02M1/0048; H02M3/1566; Y02B70/10
Inventors
王志利; 张宁