BQ2002GPN

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Introduction

Power Management integrated circuits (PMICs) are integrated circuits designed to optimize power delivery to multiple peripheral devices on a shared-power domain. One type of PMIC which plays a key role in today’s electronics markets is the battery charger, usually referred to as a BQ charger. BQ chargers, such as the widely used BQ2002GPN, are an important tool in helping to ensure efficient and safe charging of batteries.

Application Field

The BQ2002GPN is a highly integrated, low cost battery charger specifically designed for single cell Li-Ion and Li-Polymer battery-powered applications. It includes fast pre-charge, constant current/constant voltage charging and full-time pre-charge safety protection circuits. It supports charge currents from 10mA to 2000mA, and is extremely efficient with an efficiency of up to 98%. It is available in a small 6-pin SOT23 package, and is compatible with USB power.

The BQ2002GPN is a very versatile device, and can be utilized in a number of applications. It is suitable for use in phones, tablets, mobile accessories, portable music players, digital cameras, and more. It is also a popular choice for embedded battery products and electronic Toys. The wide current range allows the BQ2002GPN to be used in practically any application requiring a single cell Li-Ion or Li-Polymer battery charger.

Working Principle

The primary features of the BQ2002GPN battery charger are its programmable charging current and programmable charge termination. Each of these features is adjustable by connecting external components to the dedicated pins of the BQ2002GPN.

The programmable charging current allows external components to be connected to the dedicated pins of the BQ2002GPN to program the output current for a given charging routine. The output current is determined by the external components, depending on the application, such as portable music players, digital cameras, etc. The default output current is set at 1A.

The programmable charge termination works in conjunction with the programmable charging current. The charge termination voltage is determined by externally connecting components to the appropriate pins of the BQ2002GPN, while the charging current is determined by the external components. The charge termination voltage is typically set at 4.2V for Li-Ion batteries and 3.6V for Li-Polymer batteries.

The BQ2002GPN also contains several safety features and protection functions. These include temperature protection, over-discharge protection, over-current protection, and short-circuit protection. This helps to ensure that the battery charging process is safe, efficient, and reliable.

Additionally, the BQ2002GPN offers a wide range of monitoring functions including voltage and current readings, battery capacity readings, charge alarm and charge complete interrupt functions, as well as an over-charge protection function.

Conclusion

The BQ2002GPN is a versatile, high-efficiency, low-cost battery charger specifically designed for single cell Li-Ion and Li-Polymer battery-powered applications. It includes a range of programmable features, such as adjustable charging current and adjustable charge termination, along with a variety of safety and protection functions, such as temperature protection and over-current protection. The wide current range and efficiency of the BQ2002GPN make it an ideal choice in a wide range of applications.

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