パッケージ情報
| パッケージ | ピン数 VQFN (RGE) | 24 |
| 動作温度範囲 (℃) -40 to 85 |
| パッケージ数量 | キャリア 250 | SMALL T&R |
BQ24630 の特徴
- 300-kHz NMOS-NMOS Synchronous Buck
Converter - Stand-Alone Charger Specifically for Lithium
Phosphate - 5-V–28-V VCC Input Operating Range,
Supports 1–7 Battery Cells - 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 - Internal Loop Compensation
- Internal Soft Start
- Dynamic Power Management (DPM)
- Automatic System Power Selection From
- Safety Protection
- Input Overvoltage Protection
- Battery Thermistor Sense Suspend Charge at
Hot/Cold and Automatically ICHARGE/8 at
Hot/Cold or Warm/Cool - 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
- 30-ns Driver Dead Time and 99.95% Max.
Effective Duty Cycle - 24-Pin 4-mm × 4-mm QFN Package
- Energy Star Low Quiescent Current Iq
- < 15-µA Off-State Battery Discharge Current
- < 1.5-mA Off-State Input Quiescent Current
- APPLICATIONS
- Power Tool and Portable Equipment
- Personal Digital Assistants
- Handheld Terminals
- Industrial and Medical Equipment
- Netbook, Mobile Internet Device, and Ultra-Mobile
PC
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BQ24630 に関する概要
The bq24630 is a highly integrated lithium phosphate 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 bq24630 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 bq24630 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.