BQ2057WSNG4

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BQ2057WSNG4 is a System Pack Level 2 (SPL2) device belonging to the PMIC - Battery Chargers family. It is a fully integrated single-cell lithium-ion (Li+) and Li-polymer (Li-P) linear battery charger. It provides a complete charging solution with features such as modulation scheme, charge current, charge voltage, temperature rollback, and voltage monitoring.

The device integrates a current source-based control scheme to accuratelySET charge voltage, current and temperature rollback. This allows the device to be compliant with various battery characteristics, such as charge voltage and charge temperature. The device also features an independent input switch to implement the gate drive which can operate up to 1 MHz, allowing high-efficiency charging through the modulation of charge current and charge voltage.

The working principle of the BQ2057WSNG4 device is as follows. The device starts by initializing system controller parameters such as modulation scheme, charge current, and charge voltage. Then the device begins charging with the selected modulation scheme, monitoring battery temperature and charge voltage. When the temperature is exceeded, the device incorporates temperature rollback logic to ensure safety and perfecting the charging process. Following temperature rollback logic, the device switches from pre-programmed mode to self-learning mode which optimizes the charging process. Once the battery is fully charged, the device terminates the charge sequence and shuts down.

The BQ2057WSNG4 device has been designed for use in portable devices such as mobile phones, digital cameras, and MP3 players. It also has applications in automotive systems, motor drives, and industrial, medical, and military systems. The device can operate in any environment between -40°C and +85°C and features a wide input voltage range of 3V to 6V. The device can be programmed through the I2C bus protocol and integrated with a power-saving control mechanism to incorporate sleep/idle modes.

Overall, BQ2057WSNG4 is a highly configurable, very competitively priced, and robust charging solution in the PMIC - Battery Charger market. It offers all the attributes of a high-end charge solution within a low-cost, low-power platform. Its SW configurability and I2C implementation make it the ideal choice for power intensive applications like those in automotive systems, motor drives, and industrial and medical systems.

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