Integrated digital output voltage and current detection chip

Abstract

An integrated digital output voltage and current detection chip comprises a current signal acquisition and processing circuit, a voltage signal acquisition and processing circuit, a memory, a data processing module and a signal output interface circuit which are integrated on one chip, the current signal acquisition and processing circuit sends a current value to the memory for storage, the voltage signal acquisition and processing circuit sends a voltage value to the memory for storage, then the data processing module calculates corresponding power consumption, and the output interface circuit outputs the corresponding voltage value or current value and power consumption according to related protocols. According to the invention, the current and the voltage can be measured, power consumption can be calculated, and digital output can be achieved. Programming control is carried out on the measurable current range of the chip through the programming control circuit so as to meet the measurement requirements of currents with different magnitudes. The Hall measurement current and the voltage acquired by s voltage isolation amplifier are integrated on the same chip, so that a certain isolation function is achieved, the product cost is reduced, and the reliability is improved.

Description

technical field [0001] The invention relates to a voltage and current detection chip. Background technique [0002] Generally speaking, the existing sensors can only detect the magnitude of the current or the magnitude of the voltage, and most of them are realized by using separate devices. Most current detection methods use sampling resistors, and the introduction of sampling resistors will increase the power consumption of the circuit. In the existing practical application, it is necessary to detect the current and voltage separately in the circuit. Two sensors and an additional voltage isolation circuit are used, which makes the cost high and occupies a large area. One chip cannot detect the voltage and current at the same time. At the same time, the calculation of power consumption requires an additional single-chip microcomputer or MCU to process the measured voltage value and current value, and the cost is relatively high. [0003] Existing voltage and current detect...

AI Technical Summary

Problems solved by technology

In existing practical applications, it is necessary to detect the current and voltage separately in the circuit. Two sensors and an additional voltage isolation circuit are used, which makes the cost high and occupies a large area. One chip cannot detect the voltage and current at the same time.

At the same time, the calculation of power consumption requires an additional single-chip microcomputer or MCU to process the measured voltage and current values, and the cost is relatively high.

[0003] The existing voltage and current detection chips are basically analog output, with poor anti-interference ability. Most of the voltage and current detection chips do not have the work of voltage isolation, and most of them realize voltage isolation by adding optocouplers or other isolation circuits on the periphery.

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