BQ24704RGET

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PMIC - Battery Chargers refers to chargers for all kinds of batteries, and BQ24704RGET is a member of them. It is an advanced power-management charger IC with an integrated power FET. It integrates high-efficiency boost and buck converters, flexible current-limit algorithms, and integrated battery pass FET and RFD transistors. This feature-rich device allows battery sensing and charging to be performed with few external components.

The BQ24704RGET has excellent scalability and is ideal for applications that require different battery types and capacities. It is available in three configurations, providing an adjustable output voltage range of 4.2V to 16V.

BQ24704RGET application fields include portable medical devices, cellular phones, notebooks, tablet computers, etc. Whether the device uses a single battery or multiple batteries, or a combination of batteries with different voltages, the BQ24704RGET can be used to customize the power supply and charging circuit to satisfy the specific application requirements.

The working principle of the BQ24704RGET is as follows: it uses the Pulse Width Modulation (PWM) to control the current of the charging circuit. When charging, the charging current is limited by the PWM, and then the charging voltage is set at the set voltage, the battery can be charged in a stable state. When discharging, the PWM will switch the circuit to the discharge status, and the battery can be discharged in a stable state at the set voltage.

The BQ24704RGET IC provides three charging profiles. In the constant current/constant voltage profile, the regulation of current and voltage is achieved by the PWM, and it can be used to charge both lead acid and Li-ion batteries. In the constant voltage profile, the voltage is continuously adjusted according to the charge current, the maximum current is limited, and the pulse width modulation is used to keep the voltage constant. In the constant voltage/peak current profile, the voltage is constantly adjusted according to the current flow, and the peak current can be limited to the expected value.

The BQ24704RGET IC also provides a wide range of protections, such as overvoltage, undervoltage, short circuit, over temperature, etc. which help to protect the battery and increase its service life. Moreover, the chip can be used to control the voltage of the battery, thereby providing an excellent power management for the battery.

In summary, the BQ24704RGET IC is a versatile battery charger, it can be used in a wide range of applications and is able to provide an excellent power supply management for the battery. It integrates high-efficiency boost and buck converters, flexible current-limit algorithms, and integrated battery pass FET and RFD transistors, and offers protection against overvoltage, undervoltage, short circuit, over temperature, etc. It is an ideal choice for powering and charging handheld portable devices.

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