In recent years, the lithium battery market has developed rapidly, and the charging protection board is one of the core components in the battery pack. In order to improve the stability of the protection board, we provide a variety of CSP package MOS and unique CSP package with excellent electrical performance and excellent heat dissipation performance for the lithium battery charging protection board module, with ESD electrostatic protection inside, which is ultra-small and ultra-thin. With the ultra-small package (0201)TVS, the lithium battery products are more precise and detailed.