BQ2057CDGKG4

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The BQ2057CDGKG4 is a PMIC (Power Management IC) that can be used as a battery charger, allowing users to charge embedded and replaceable batteries from a wide range of source inputs. It is designed to be extremely flexible and highly efficient, making it perfect for both residential and industrial settings. It is also designed for safety, offering protection against overvoltage and overcurrent conditions, and has integrated thermal shutdown to handle high temperature situations.

The BQ2057CDGKG4 is a single-output, integrated, switch-mode battery charger which contains all of the necessary components to provide a complete charging solution. It is capable of providing a maximum output current of 500mA, and can accept inputs from a wide range of voltage sources, from 6.5V to 35V. It also features a wide temperature operating range, from -40°C to +85°C.

In terms of its application field, the BQ2057CDGKG4 is primarily targeted at powering, charging and protecting rechargeable battery packs used in embedded and portable applications. These applications may include, but not be limited to, cordless telephones, digital cameras, cellular phones, portable medical equipment, laptop and notebook computers and handheld GPS units.

The BQ2057CDGKG4 is capable of charging lead-acid, Li-Ion, Li-Po, NiMH and NiCd batteries, and can operate with single, dual and multiple cell configurations. Its switching frequency is rated at 1.2MHz, providing improved thermal efficiency over linear chargers, and is also capable of handling charge voltages up to 16.8V, for lead-acid batteries, and up to 7.5V for other battery types.

The BQ2057CDGKG4 is designed to offer excellent protection against overvoltage and overcurrent conditions. It features an internal charge current limiter and an adjustable maximum charge voltage limiter to monitor for overvoltage conditions, and an adjustable current sense limit to monitor for overcurrent conditions. It also features an internal voltage limited source current limiter that allows the current draw from the AC source to be limited to the maximum safe levels. This protection scheme offers improved safety over linear charges, and helps to extend the life of the battery.

The BQ2057CDGKG4 also offers thermal shutdown as well as thermal protection, ensuring that the charger is not damaged or over-loaded in high-temperature conditions. Its integrated short circuit protection prevents excess current from flowing in the event of a short circuit, while its open-drain output allows for the use of multiple chargers simultaneously. The output of the charger is capable of sinking up to 1.2A of current.

In summary, the BQ2057CDGKG4 is an efficient and flexible PMIC battery charger that is perfect for a wide range of embedded and replaceable battery applications. It offers excellent safety features and a wide input voltage range, allowing for charging from a variety of sources. It is also capable of charging most battery types, and its integrated features offer protection against overvoltage and overcurrent conditions, as well as thermal shutdown and protection.

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