Описание
The bq2461x is a highly integrated Li-ion or Li-polymer switched-mode battery charge controller. The device offers a constant-frequency synchronous switching PWM controller with high-accuracy charge current and voltage regulation, charge preconditioning, termination, adapter current regulation, and charge status monitoring. The bq2461x charges the battery in three phases: preconditioning, constant current, and constant voltage. Charge is terminated when the current reaches a minimum user-selectable level. A programmable charge timer provides a safety backup. The bq2461x 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.
Converter
Polymer
Supports 1- to 6-Battery Cells (bq24610)
Supports 1- to 5-Battery Cells (bq24617)
- &plusm;0.5% Charge Voltage Accuracy
- &plusm;3% Charge Current Accuracy
- &plusm;3% Adapter Current Accuracy
- Automatic System Power Selection From
Adapter or Battery - Internal Loop Compensation and Soft Start
- Dynamic Power Management
- Input Overvoltage Protection
- Battery Thermistor Sense Hot and Cold
Charge Suspend - Battery Detection
- Reverse Protection Input FET
- Programmable Safety Timer
- Charge Overcurrent Protection
- Battery Short Protection
- Battery Overvoltage Protection
- Thermal Shutdown
- Adapter Present
- Charger Operation Status
Effective Duty Cycle
- < 15-µA Off-State Battery Discharge Current
- < 1.5-mA Off-State Input Quiescent Current
- Netbooks, Mobile Internet Devices, and Ultra-
Mobile PCs - Personal Digital Assistants (PDAs)
- Handheld Terminals
- Industrial and Medical Equipment
- Portable Equipment
