BQ24721CRHBT

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Power management integrated circuits (PMICs) are an integral part of modern electronic devices. They help optimize the energy consumption of electronic systems, balance the supply and demand of energy, and also selectively turn off parts of the system. The BQ24721CRHBT is a high-performance multi-chemistry battery charger IC for use in automotive applications. It combines the most advanced charging algorithms with a high-efficiency, small form factor design. This allows it to charge Lithium (Li+), Li-ion, and Nickel-based batteries in small portable electronics.

The BQ24721CRHBT belongs to PMIC - Battery Chargers. It is an ideal charger for vehicles, as it can handle a wide range of charging needs from slow to fast charging. The device is further optimized to support engine start/stop, low voltage start and deep cycle low temperature charging. It has charge terminals that allow it to be connected to the vehicle battery, and electronic control terminals that enable connection to the system microcontroller. An analog reference is also provided to enable precision voltage measurements.

The BQ24721CRHBT works on a buck-boost topology to effectively charge any battery, regardless of its state of charge or type. It is then optimized to reduce the system\'s thermal footprint that comes with charging a battery. The charge cycle is adjusted to ensure a safe and efficient end of charge condition when the battery is nearly full. It also has programmable safety features that ensure the safety of the battery and system during the charging process. Finally, a safety timer ensures that the battery is not overcharged.

The BQ24721CRHBT supports two charging modes: constant current constant voltage (CCCV) and pulse width modulation (PWM). In CCCV mode, the charging current is kept constant until the battery voltage reaches the set voltage limit. The device then maintains the voltage and reduces the current. In PWM mode, a pulse is sent to the battery at a constant frequency and the current is modulated by the duty cycle of the pulse. This allows for a more efficient charging of the battery. It also has charge enable, battery temperature monitoring, and a low battery voltage cut-off feature.

The BQ24721CRHBT is designed to be used in applications that require a high degree of accuracy in their battery charging performance. It is especially well-suited for use in vehicles, as it supports power management features that enable an efficient and safe vehicle charging environment. The device also has an integrated protection scheme and low power mode, which helps reduce power consumption even when the charger is not in use. This makes it suitable for modern automotive applications where power saving is of paramount importance.

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