BQ25050DQCT

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The BQ25050DQCT is a high performance synchronous buck battery charger for single-cell rechargeable batteries. It contains N-channel MOSFETs power switches and a single inductor, direct charge current regulator, voltage control loop and safety timer. This charger provides an efficient solution for many battery application fields.

Application Field

The BQ25050DQCT is suited for applications with single-cell rechargeable Li+) or LiFePO4) batteries. This charging controller offers a maximum input voltage of 42V and maximum input current of 5A. It is suitable for automotive and consumer applications with portable devices such as cellular phones, PDAs, and other consumer electronics. Moreover, the BQ25050DQCT is a popular choice for external Battery and Mobile Power Source (BMS) applications.

Working Principle

The BQ25050DQCT combines an input voltage regulator, a current regulator and a voltage control loop in a power stage. This power stage consists of a single N-channel MOSFET. The input voltage regulator is used to detect the applied input voltage and limit its value to the internal maximum value which is programmed by a resistor and set at 42V. The current regulator is used to detect the required peak current and limit it to a maximum value of 5A. Additionally, it is used to reduce the power consumption. Finally, the voltage control loop is used to control the output voltage of the charger and the current flow.

The BQ25050DQCT integrates safety timers which are designed to terminate the charging event and limit the charging time during hot charging conditions. This charger also features a host interface which enables communication between the host and the controller. The features of BQ25050DQCT, such as low input ripple current and wide input voltage range, make it an ideal choice for many battery application fields.

Conclusion

The BQ25050DQCT is a high performance, synchronous buck battery charger ideal for many battery application fields. It integrates several features such as low input ripple current, wide input voltage range and safety timers. These features make the BQ25050DQCT an efficient solution for many rechargeable battery applications, such as automotive and consumer electronics.

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