Packaging information
| Package | Pins VQFN (RGE) | 24 |
| Operating temperature range (°C) -40 to 85 |
| Package qty | Carrier 3,000 | LARGE T&R |
Features for the BQ24617
- 600-kHz NMOS-NMOS Synchronous buck converter
- Stand-alone charger support for li-ion or li-polymer
- 5-V to 28-V VCC Input operating range and supports 1- to 6-battery cells (BQ24610)
- 5-V to 24-V VCC Input operating range and supports 1- to 5-battery cells (BQ24617)
- Up to 10-A charge current and adapter current
- High-accuracy voltage and current regulation
- ±0.5% Charge voltage accuracy
- ±3% Charge current accuracy
- ±3% Adapter current accuracy
- Integration
- Automatic system power selection from adapter or battery
- Non Power Path option for low total BOM cost
- Internal loop compensation and soft start
- Dynamic power management
- Safety protection
- 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
- Status Outputs
- Adapter present
- Charger operation status
- Charge enable pin
- 6-V Gate drive for synchronous buck converter
- Energy star low quiescent current Iq
- < 15-µA Off-state battery discharge current
- < 1.5-mA Off-state input quiescent current
Description for the BQ24617
The BQ2461x is a highly integrated Li-ion, Li-polymer or Lead-acid 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.