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.
- .
- Adjustable charge voltage
- .
- Automatic power path selector between adapter and battery
- .
- Dynamic power management
- .
- Integrated 20V switching MOSFETs
- .
- Integrated bootstrap diode
- .
- Internal digital soft start
- .
- Thermal shutdown
- .
- Adjustable input overvoltage protection
- .
- Cycle-by-cycle current limit
- .
- 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.
