BQ2002TPN

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PMIC - Battery Chargers are an important component of modern day electronic devices, as they are responsible for supplying current to the device\'s internal components. The BQ2002TPN is an extended version of the earlier BQ2002, with additional features such as adjustable current limit and thermal protection. This article will discuss the application field and working principle of the BQ2002TPN.

The BQ2002TPN is a linear current-CC-type charger that offers excellent charging performance for a range of batteries, including Lithium, NiCad and NiMh. The device is primarily used for recharging consumer electronics, such as cellphones and MP3/MP4 players, although it can also be used to charge battery-powered medical devices, such as heart monitors, diabetes monitors, and hearing aids. In addition, the BQ2002TPN can be used to charge battery packs used in automotive applications, such as power tools and emergency lighting.

The BQ2002TPN has a built-in 4.2 Volt output, with adjustable current limits of 300mA, 500mA, 700mA, 900mA and 1200mA. In addition, it has integrated thermal protection, and reverse current protection, which prevents battery damage due to deep discharge. This is particularly useful when recharging Lithium batteries, which are sensitive to deep discharge. The device is designed to work with rechargeable batteries, and can be programmed to charge different battery types, such as Lithium, NiCad, and NiMh.

The working principle of the BQ2002TPN is simple. When a battery is connected to the charger, the device automatically adjusts the current based on the battery’s voltage level. When the voltage levels reach a certain level, the current limiter kicks in and prevents further charging. This is done to ensure safety and extend the life of the battery. Once the current limit is reached, the charger goes into a “sleep” mode and stops charging. This prevents overcharging and preserves the battery’s longevity.

The BQ2002TPN is also designed to be energy efficient. The charger consumes only 6mW of power while in sleep mode, so it won’t drain batteries when not in use. The charger also has a power indicator LED, which lights up when the device is charging. This LED is also useful to indicate when the device has finished charging. In addition, the BQ2002TPN has an adjustable temperature range, which allows it to charge efficiently in different temperatures.

In conclusion, the BQ2002TPN is a versatile and efficient battery charger, suitable for a wide range of applications. It has built-in features for safety and for energy efficiency, and can be programmed to charge different battery types. Its simple working principle and adjustable current limits make it an ideal charging solution for consumer electronics, medical devices, and automotive applications.

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