BQ24172RGYT

1.6 MHz的同步开关模式锂离子和锂聚合物独立型电池充电器 1.6-MHz Synchronous Switch-Mode Li-Ion and Li-Polymer Stand-Alone Battery Charger

The is a synchronous switch-mode Li-ion and Li-polymer stand-alone Battery Charger with two integrated N-channel power MOSFETs. The device offers a constant-frequency synchronous PWM controller with high-accuracy regulation of input current, charge current and voltage. The bq2417x closely monitors the battery pack temperature to allow charge only in a preset temperature window. It can be adjustable for up to three series Li+ cells. The device charges the battery in three phases: preconditioning, constant current and constant voltage. Charge is terminated when the current reaches 10% of the fast charge rate. A programmable charge timer offers a safety backup. It automatically restarts the charge cycle if the battery voltage falls below an internal threshold and enters a low-quiescent current sleep mode when the input voltage falls below the battery voltage.

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Adjustable charge voltage

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Automatic power path selector between adapter and battery

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Dynamic power management

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Integrated 20V switching MOSFETs

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Integrated bootstrap diode

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Internal digital soft start

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Thermal shutdown

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Adjustable input overvoltage protection

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Cycle-by-cycle current limit

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Green product and no Sb/Br

Device has limited built-in ESD protection, leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates.