Regarding circuit over-current protection, there are many ways, commonly used circuit protection with thyristor as the core, circuit protection with useful transistor as the core, circuit protection with useful relay as the core, useful disposable fuses, useful bimetallic strips The temperature control circuit, also useful ASIC protector and so on.
Except for bimetallic strips and disposable fuses, other methods require supporting circuits such as sensing elements, sampling amplifier circuits, comparators, and control drive circuits. The common points are: the number of components used, the number of leads, the increase of PCB area, the difficulty of design and production debugging, and the increase of costs, because the number of components and the high failure rate increase the service cost.
If you use a disposable fuse and a bimetallic strip, you only need to connect one in series, and the circuit is simple and reliable. However, the disposable fuse is a one-time and cannot be reused. The bimetallic strip will repeatedly connect to the fault circuit after the failure occurs. The scope of the fault.
In view of the fact that none of the above methods are ideal, the self-resetting overcurrent protector series PPTC product provided by Ruilongyuan Electronics-PPTC overcurrent protector is an ideal overcurrent protection component in the circuit. It only needs to be connected in series. Reduce the number of components, wire length, PCB area and save costs (traditional sensing elements, sampling amplifier circuits, comparators, control circuits and driving circuits can be removed at one time); it not only improves product quality, but also saves manufacturing Cost and service cost.
The PPTC of Ruilongyuan Electronic Overcurrent Protection Device has the following eight advantages:
1. Convenient installation: PTC has no positive and negative polarity. It is not afraid of reverse connection and can be connected in series with the circuit that needs protection. It is not only widely used, but also safe and reliable.
2. Repeated use: After the power is cut off and the fault is eliminated, it will automatically return to the normal state without manual replacement and can be reused.
3. Superior performance: It is not only over-current protection, but also resistant to long-term surge current damage to the circuit, and can protect the circuit before failure occurs.
4. No reconnection: Under fault conditions, the fault circuit will not be restored or repeatedly connected (other protection circuits, bimetals, etc. will be repeatedly connected to repeatedly expand the fault range).
5. Improve quality: It can improve the quality of customers' products, greatly reduce the natural damage rate of the finished product, and greatly extend the service life of the product without worries.
6. Product value-added: Due to the addition of high-tech elements, it can add new shining points to customers' products, so that vulnerable circuits are no longer fragile. Improve the use value of the product. Can be sold at a high price.
7. Reduce costs: Compared with other protection circuits, reduce: the number of components, PCB area, damage to the operation process and additional costs; and can improve production efficiency and reduce defect rates.
8. Efficiency improvement: It can improve the design efficiency of engineers and the accuracy and reliability of protection. Greatly reduce service costs and other hidden costs.
For more knowledge about diodes, please pay attention to the official website of Ruilongyuan Electronics: www.ruilon.com
