SSD with Power Loss Protection (PLP)

When electronic product facing sudden power loss, it is time to test its robustness and reliability. Sudden power loss may affect the completeness when writing data. In worst circumstances, it may cause data corruption and even damage of operating system. Therefore, power loss protection is essential for industrial SSD, with power loss protection technology, not only the existing data can be protected, data can be flushed into NAND flash completely and accurately to minimise the risk of data damage.

SSD power loss protection technology including 2 steps, first step is to stop data coming from host, second step is to flush all received data into NAND flash.

Power loss protection SSD circuit including voltage detector to monitor power supply status. When voltage detector detected voltage drop to V1, it will send a warning signal to controller, after receiving signal, controller stop receiving data from host and start to flush all data that have received into NAND flash. By the time voltage drop to V2, all data should be flushed completely.

time for flushing data into NAND flash

If SSD added a DRAM as cache, it increases the read/write performance of SSD but at the same time it means more data coming from host and more time is needed to store data into NAND flash. Therefore, to improve power loss protection function and make sure the completeness of data, the key is to prolong the time(t) when voltage drop, so controller have enough time to complete flushing without missing any data.

SSD with tantalum capacitor
SSD with tantalum capacitor

Kogen provides PLP SSD with tantalum capacitor inside to extend the time for controller to flush data into NAND flash. Even performance is up to 500MB/s, no data will be missing when facing sudden power loss. Power loss protection highly increased the reliability of SSD, and it makes SSD a perfect storage for industrial application.

more time for data flushing

Looking for special feature SSD such as power loss protection to support? You may contact Kogen Singapore now.

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