パッケージ情報
| パッケージ | ピン数 VQFN (RHL) | 20 |
| 動作温度範囲 (℃) -40 to 85 |
| パッケージ数量 | キャリア 250 | SMALL T&R |
BQ24104 の特徴
- Ideal For Highly Efficient Charger Designs For
Single-, Two-, or Three-Cell Li-Ion and Li-Polymer
Battery Packs - bq24105 Also for LiFePO4 Battery (see Using
bq24105 to Charge the LiFePO4 Battery) - Integrated Synchronous Fixed-Frequency PWM
Controller Operating at 1.1 MHz With 0% to 100%
Duty Cycle - Integrated Power FETs for Up To 2-A Charge
Rate - High-Accuracy Voltage and Current Regulation
- Available in Both Stand-Alone (Built-In Charge
Management and Control) and System-Controlled
(Under System Command) Versions - Status Outputs for LED or Host Processor
Interface Indicates Charge-In-Progress, Charge
Completion, Fault, and AC-Adapter Present
Conditions - 20-V Maximum Voltage Rating on IN and OUT
Pins - High-Side Battery Current Sensing
- Battery Temperature Monitoring
- Automatic Sleep Mode for Low Power
Consumption - System-Controlled Version Can Be Used in NiMH
and NiCd Applications - Reverse Leakage Protection Prevents Battery
Drainage - Thermal Shutdown and Protection
- Built-In Battery Detection
- Available in 20-Pin, 3.50 mm × 4.50 mm VQFN
Package - APPLICATIONS
- Handheld Products
- Portable Media Players
- Industrial and Medical Equipment
- Portable Equipment
All other trademarks are the property of their respective owners
BQ24104 に関する概要
The bqSWITCHER™ series are highly integrated Li-ion and Li-polymer switch-mode charge management devices targeted at a wide range of portable applications. The bqSWITCHER™ series offers integrated synchronous PWM controller and power FETs, high-accuracy current and voltage regulation, charge preconditioning, charge status, and charge termination, in a small, thermally enhanced VQFN package. The system-controlled version provides additional inputs for full charge management under system control.
The bqSWITCHER™ charges the battery in three phases: conditioning, constant current, and constant voltage. Charge is terminated based on user- selectable minimum current level. A programmable charge timer provides a safety backup for charge termination. The bqSWITCHER™ automatically restarts the charge cycle if the battery voltage falls below an internal threshold. The bqSWITCHER™ automatically enters sleep mode when VCC supply is removed.