BQ2002TPNG4

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BQ2002TPNG4 is a Texas Instruments (TI) device, identified as a switch-mode battery charger. It is a Programmable Battery Charger Unit with other features, including allows the user to control the switch-mode battery charging process, and make the charging process more efficient and reliable. The BQ2002TPNG4 device is also capable of detecting when the battery is finished charging, as well as provide overvoltage protection and temperature-based charge termination.

The BQ2002TPNG4 device is manufactured and sold to be used in a range of applications, including portable electronics that require power management, such as cell phones, tablets, music players, digital cameras, and more. It is designed to charge individual lithium ion and lithium polymer cells, as well as other battery types such as nickel-cadmium and nickel-metal hydride.

The BQ2002TPNG4 device offers many features to support intelligent and efficient charging of batteries, including overcharge and over-discharge protection, and protection from both under-voltage and over-voltage conditions. The device also features an auto-resume function that allows it to charge batteries efficiently without having to continuously monitor the charging process. Additional features of the device include support for pre-charging functions and a safety timer, as well as support for low-voltage drop and reverse current protection.

The working principle of the BQ2002TPNG4 device is fairly straightforward. As a switch-mode battery charger, the device contains a two-stage charger circuit. The first stage is designed with a constant current charge mode, while the second stage utilizes a constant voltage charge mode. When the user connects the battery to the charger, the device then starts the charging process. In the first stage, the device supplies a constant current to the battery, until the battery reaches its peak voltage (usually 4.2V for Li-ion batteries). At this point, the second stage of charging is engaged, where the device then maintains the supplied voltage at a constant 4.2V and reduces the charge current as the battery reaches full charge.

The BQ2002TPNG4 device also features support for temperature-based charge termination. This prevents the overcharging of the battery, which in turn prevents the battery from developing a “memory”. This memory can cause the battery to become unable to charge, or even worse, permanently damaged. The BQ2002TPNG4 device prevents this by monitoring the battery’s temperature and accounting for it during the charging process. This ensures a safe, reliable, and efficient charging process.

One of the most advantageous features of the BQ2002TPNG4 device is its ability to be highly customizable. This device offers configurable parameters, such as charge current limit, charge voltage, and charge termination delta T, which allow the user to tailor the charging profile to match the needs of each individual battery. The BQ2002TPNG4 also features multiple bus input locations, enabling the user to integrate the device into any environment with ease.

In conclusion, the BQ2002TPNG4 device is a highly efficient, reliable, and customizable switch-mode battery charger which is designed to charge individual lithium ion and lithium polymer cells, as well as other battery types such as nickel-cadmium and nickel-metal hydride. It is designed to be used in a wide variety of power management applications, such as portable electronics, and features a two-stage charger circuit, overcharge and over-discharge protection, temperature-based charge termination, and low-voltage drop and reverse current protection. The BQ2002TPNG4 device is a great choice for anyone looking for an efficient, reliable, and cost-effective battery charging solution.

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