Hall Current Sensor GX91X (Compatible with ACS712/ACS724) for IoT Smart Photovoltaic Circuits

The mainstream use of photovoltaic in the industry in the form of centralized power generation, the photovoltaic module will be connected in series and parallel to get the photovoltaic array, to ensure that the output voltage and current is high enough to ensure that the high-power centralized grid-connected inverter for the maximum power point tracking and grid-connected control, but the advantages and disadvantages of this approach are also more obvious each photovoltaic cell installation angle, local shadows, the impact of electrical parameters, each different photovoltaic panel voltage is not the same, long-term operation will lead to hot spots, and shorten the photovoltaic plate The voltage of each different PV panel is different, and long-term operation will lead to hot spots and shorten the service life of PV panels.

In order to overcome the problem of unstable internal voltage of traditional PV panels, this paper introduces an intelligent PV circuit for the Internet of Things (IoT), which is a PV cell maximum power point tracking converter circuit based on a BUCK circuit, which converts and stores solar energy into a battery, and an intelligent PV circuit for the Internet of Things (IoT), comprising a main chip, a power supply module, a key circuit, a current detection circuit, a voltage detection circuit, a display circuit, an alarm module, a PWM output circuit, an alarm circuit, and a power supply circuit. The circuit includes a main chip, a power supply module, a key circuit, a current detection circuit, a voltage detection circuit, a display circuit, an alarm circuit, a PWM output circuit, a wireless circuit and an IOT circuit.

The current detection circuit adopts the isolated integrated current sensor chip GX91X, which has a primary conductor resistance of 1.2mohm and can be used for low power loss and high inrush current tolerance. The product features are as follows:

1, integrated shielding virtually eliminates capacitive coupling from the current conductor to the chip, greatly suppressing output noise due to high dv/dt transients;. 

2, industry-leading noise performance, through the proprietary amplifier and filter design techniques to greatly increase the bandwidth, faster response time in control applications.

3、Isolation voltage 1200V

4, the stability of the operating range: 1.6% @ 25 ℃ ~ 125 ℃; 2.5% @ -40 ℃ ~ 25 ℃

5, static common mode output point of 2.5V or 50% VCC

6, strong anti-interference ability, strong resistance to mechanical stress, the magnetic field parameters are not subject to external pressure and drift