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Dc charging pile power switch chip overvoltage protection module OVP
Main component
Concept:
OVP (Over Voltage Protection) is an important part of the DC charging pile power switch chip, its main function is to quickly cut off the power or suspend the output when the input voltage exceeds the preset safety threshold, in order to protect the back-end circuit from damage. The OVP module is essential for maintaining the safe operation of charging stations and connected devices.
Function:
The functions of the OVP module include:
1. Protection circuit: Prevent damage to the rear circuit due to high input voltage.
2. Maintain stability: Ensure that the charging pile works within a safe voltage range to avoid damage to the equipment caused by voltage fluctuations.
3. Rapid response: When the voltage exceeds the threshold, it can respond quickly and cut off the power supply in time to reduce the risk of damage.
4. Recovery function: After the voltage is restored to normal, the OVP module can control the power supply recovery and continue the charging process.
Working Principle:
The working principle of OVP module can be divided into the following steps:
1. Voltage monitoring: The OVP module continuously monitors the input voltage to ensure that it is within the safe range.
2. Compare the set threshold: The monitored voltage is compared with the preset overvoltage threshold.
3 Trigger protection measures: Once the input voltage exceeds the threshold, the OVP module will trigger the protection mechanism, usually through the internal MOSFET quickly shut off, cut off the power output.
4. Wait for voltage recovery: After the output is cut off, the OVP module will wait for the input voltage to fall back to a safe level.
5. Output recovery: When the voltage returns to the normal working range, the OVP module controls the MOSFET again to restore the normal power output.
Sum up
The design of OVP modules needs to take into account key parameters such as input voltage range, overvoltage protection threshold, on-resistance, turn-off time, etc. These parameters ensure that the OVP module can effectively protect charging stations and connected devices under different operating conditions. For example, the OVP chip AW32915AFCR has the input voltage range of 3V-28V, the overvoltage protection voltage adjustable range of 4V-24V, the on-impedance of 27mΩ and the fast turn-off time of 50ns, which makes it suitable for a variety of charging pile application scenarios.
Through the above introduction, it can be seen that the OVP module of the DC charging pile power switch chip is an important technology to ensure charging safety and prevent damage caused by abnormal voltage. It provides a layer of reliable protection for the charging pile through accurate voltage monitoring and fast response mechanism.
DC CHARGING PIlE SERIES
DC charging pile is an efficient charging facility for electric vehicles, which uses direct current (DC) to directly charge the vehicle battery, significantly reducing the charging time. Compared with traditional AC charging piles, DC charging piles are able to provide higher power output and can usually charge an EV to 80% of its capacity in 30 minutes, providing users with a convenient charging experience.
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