BQ2002DSN Integrated Circuits (ICs)

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The BQ2002DSN is a switch-mode battery charger, and forms part of the Power Management Integrated Circuit (PMIC) range from Texas Instruments. BQ2002DSN designs are typically used in a wide range of applications, such as portable radios, radios, cameras and other smaller-scale electronic products. The BQ2002DSN offers benefits such as an integrated charger and low quiescent current.

The BQ2002DSN uses a buck-type regulator to convert an external power supply voltage, such as 12V, into a constant battery voltage. In addition, it provides charging current regulation, over-voltage battery protection, over-temperature protection and fast charge current regulation, allowing the battery to be charged safely and quickly.

The BQ2002DSN features an eight-pin Small Outline Integrated Circuit (SOIC) package that can easily be integrated into a wide range of applications. It also features an adjustable 1.5V or 2.4V minimum battery voltage, 1.200V maximum battery voltage and an adjustable maximum charging current of 320mA. Furthermore, the BQ2002DSN includes an optional always-on input, which is suitable for designs where it is necessary to maintain a constant power supply in standby mode.

The BQ2002DSN utilizes a switch-mode battery charging scheme that is designed to operate in different modes, depending on whether the battery is connected or not. This is referred to as “mode-switching”, and is based on the difference in voltage between the external power source and the battery. When the external source voltage is above the battery voltage, the chip switches to constant-current (CC) mode, which supplies the battery with a constant regulated charge current. When the external voltage is below the battery voltage, the chip switches to constant-voltage (CV) mode, which supplies a constant regulated voltage to the battery.

In addition, the BQ2002DSN also includes an auto-recharge feature, which allows the chip to switch back to constant-current mode as soon as the battery voltage reaches the set recharge threshold. This feature is especially useful in designs where the batteries need to be charged quickly, as it ensures that the batteries are charged to their maximum capacity as quickly as possible.

Overall, the BQ2002DSN is well suited for a wide range of applications, due to its small package size, adjustable charging parameters and automatic charge mode-switching capability. The BQ2002DSN is an ideal choice for designs that require a low power, efficient and accurate switch-mode battery charger.

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