S6519W9

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S6519W9 is a high-efficiency, highly integrated, non-contact charge-discharge integrated protection device, mainly used for small-capacity rechargeable lithium battery. It integrates comprehensive battery safety protection functions such as overcharge protection, over-discharge protection, overcurrent protection, short circuit protection, thermal protection, and low-voltage protection. It can not only detect that the actual battery voltage is higher than the overcharge threshold VDCHG or lower than the over-discharge threshold, but also can detect input voltage when charging, output voltage when discharging, and charging current.

Application field

S6519W9 is suitable for mostly lithium iron phosphate batteries in power tools, notebook computers, and digital equipment. The application requirement distinguishes three current levels: 0.3A/0.5A/1.2A. The low output ripple and low standby current consumption make it suitable for applications with high power consumption. In addition, it is fully compliant with the internationally recognized UL60950 safety standard, so its safety performance is excellent. The quality and safety performance of the S6519W9 are in line with the actual needs of terminal equipment users and help manufacturers to reduce the safety risks and design iterations of production. At the same time, it can effectively prevent overcharge, over-discharge, overcurrent, short circuit, and temperature problems, and improve product safety and reliability.

Working Principle

The working principle of the S6519W9 is based on the voltage difference between the protection voltage of the device and the actual battery voltage. Once the battery voltage is higher than the overcharge threshold VDCHG, or lower than the over-discharge threshold, the S6519W9 will automatically cut off the charging or discharging path. Since the system can sense the voltage is lower than over-discharge threshold, so the device will automatically enters Sleep state with low standby current consumption when the discharge cut-off .S6519W9 integrates a new Hiccup Timer function, which can ensure the consistency of over-discharge protection. When the over-discharge protection action occurs, the battery voltage will recover due to self-recovery, and the device will have a Hiccup Timer with a max. 7 cycle delay. If the battery voltage is lower than the over-discharge level within the cycle, the S6519W9 will reset and re-do the protection cycle, and when the battery voltage rises to the safe level, the S6519W9 will restore the load.

The S6519W9 is also equipped with optimized charging and discharging algorithms. It integrates a charge overvoltage protection and active reset charge control that prevents the voltage when it goes above the set voltage. In addition, the S6519W9 also integrates high-precision CC, CV fast charging, and TC and voltage drop zero current discharge control technologies. With these technologies, the S6519W9 can reach full charge/discharge protection performance, and at the same time optimize the charge/discharge current ripple and reduce system power consumption.

In addition, the S6519W9 can also detect when the charging current gets too high, and when this happens, the device will shut down automatically and prevent external loads from entering. At the same time, when the temperature is too high, the device will enter a self-protection state, and a TSD flag will be pushed out to notify the system.

In short, the S6519W9 is a high-performance, highly-integrated, non-contact charge-discharge integrated protection device. It integrates comprehensive battery safety protection, including overcharge protection, over-discharge protection, overcurrent protection, short circuit protection, thermal protection, and low-voltage protection. It is suitable for most lithium iron phosphate batteries in power tools, notebook computers and digital equipment.

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