This reference design is a high cell voltage accuracy 5s–7s Lithium-ion (Li-ion), Lithium Iron phosphate (LiFePO4) battery pack design. The design monitors each cell voltage, pack current, cell and metal-oxide semiconductor field-effect transistor (MOSFET) temperature with high accuracy and protects the Li-ion, LiFePO4 battery pack against cell overvoltage, cell undervoltage, overtemperature, charge and discharge overcurrent and discharge short-circuit situations. The product adopts low-side N-channel MOSFET architecture and has strong driving on and off capability. These features make this reference design highly applicable for power tools and vacuum cleaner battery pack applications.