A Programmable Current Detection Circuit

A technology for programming current and detection circuits, which is applied in the direction of measuring current/voltage, measuring devices, and measuring electrical variables, etc. It can solve the problems of increasing system complexity and power consumption, low precision of current detection circuits, and poor adjustability, etc., and achieves good results. Adjustability, save chip area, fast effect
CN104020339BInactive Publication Date: 2016-07-27UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
UNIV OF ELECTRONICS SCI & TECH OF CHINA
Publication Date
2016-07-27
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to the technical field of electronic circuits, in particular to a programmable current detection circuit. The programmable current detection circuit of the present invention includes a sampling resistor, a current detection unit and a comparator; wherein, the power supply terminal of the current detection unit is connected to the power supply VIN, and its first input terminal is connected to the second input terminal after passing through the sampling resistor, and its first The output terminal is connected to the positive input terminal of the comparator, and the second output terminal is connected to the negative input terminal of the comparator; the output terminal of the comparator is the output terminal of the programmable current detection circuit. The beneficial effect of the present invention is that it is suitable for wide input power supply voltage; it can be applied to the current detection of high-power BUCK converters, the detection accuracy is high, the speed is fast, and the circuit structure is simple, which avoids the need for additional modules. The invention is particularly applicable to programmable current detection circuits.
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Description

technical field

[0001] The invention belongs to the technical field of electronic circuits, and in particular relates to a programmable current detection circuit. Background technique

[0002] With the rapid development of portable digital products, switching power supply chips are widely used. While promoting the development of switching power chip technology, the market also puts forward higher requirements for the performance of switching power chip. Voltage-mode switching power supply chips have basically been eliminated and replaced by current-mode switching power supply chips. This is mainly due to the fact that compared with the voltage mode, the switching power supply chip of the current mode has the advantages of simple compensation network, fast transient response, and easy current protection. Compared with the voltage mode, the current mode switching power supply chip adds an important circuit module - the current detection circuit. In addition, the current det...

Claims

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