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Pin multiplexing method and system for current sensor chip

A current sensor and pin multiplexing technology, which is applied in the improvement of basic electrical components and the use of digital measurement technology for measurement, etc. problem, to achieve the effect of pin multiplexing

Pending Publication Date: 2017-11-10
杭州思泰微电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the over-current indication signal is also a transient response, it is difficult for the signal output signal with a low-pass filter to meet the requirements of providing a high-speed over-current indication signal
That is, each pin of the existing current sensor chip has only a single function, and the pins cannot be reused. When more functions need to be realized, the number of pins will be increased, thereby increasing the cost of the chip and its occupation on the circuit board. area

Method used

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  • Pin multiplexing method and system for current sensor chip
  • Pin multiplexing method and system for current sensor chip
  • Pin multiplexing method and system for current sensor chip

Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0022] See Figure 4 , Figure 5 As shown, Embodiment 1: a pin multiplexing system applied to a current sensor chip, which includes a current sensor chip, and a voltage processing current sensor chip is provided with a signal output module 400 to be tested, a low-pass filter 401 and a voltage Processing module 404, an output terminal of the signal output module 400 to be tested is connected to an input terminal of the low-pass filter 401 and an input terminal of the voltage processing module 404, and the output terminal of the low-pass filter 401 is the detection signal output pin 402, to be The other output terminal of the measurement signal output module 400 is connected to the other input terminal of the voltage processing module 404, and the output terminal of the voltage processing module 404 is a zero current bias voltage signal pin 403, wherein the voltage processing module 404 includes a multiplexer 404E 1. High-speed comparators 404C and 404D with hysteresis characte...

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Abstract

The invention relates to the technical field of multiplexing of a pin of a current sensor chip, particularly to a pin multiplexing system for a current sensor chip to realize pin multiplexing of a current sensor chip. The system comprises a current sensor chip. A voltage value outputted by a detection signal output pin or zero-current bias voltage signal pin of the current sensor chip is processed before outputting; and when a to-be-measured current flowing through the current sensor chip exceeds a threshold, a curve of the voltage value outputted by the detection signal output pin or zero-current bias voltage signal pin changes the indication characteristic.

Description

technical field [0001] The invention relates to the technical field of multiplexing pins of a current sensor chip, in particular to a pin multiplexing system applied to a current sensor chip. Background technique [0002] The current sensor chip is a chip that uses magnetic sensor technology to obtain the amplitude and polarity of the current signal flowing through the conductor to be measured by sensing the magnetic field formed by the internal (or external) energized conductor of the chip. This chip is widely used in industrial control, home appliances and other fields. Due to the decreasing size of equipment, users hope that while obtaining a current sensor chip with good performance, they also hope that the area occupied by the current sensor chip and its peripheral circuits should be as small as possible on the PCB. [0003] figure 1 The pin definition and application circuit of a typical current sensor chip are shown: 100 is a current sensor chip; 101~104 are four cu...

Claims

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Application Information

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IPC IPC(8): G01R1/20G01R19/25
CPCG01R1/20G01R19/25
Inventor 黄海滨蒋赛尖朱杰
Owner 杭州思泰微电子有限公司