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BQ24232
- Fully Compliant USB Charger
- Selectable 100-mA and 500-mA Maximum Input Current
- 100-mA Maximum Current Limit Ensures Compliance to USB-IF Standard
- Input-based Dynamic Power Management (VIN- DPM) for Protection Against Poor USB Sources
- 28-V Input Rating With Overvoltage Protection
- Integrated Dynamic Power-Path Management (DPPM) Function Simultaneously and Independently Powers the System and Charges the Battery
- Supports up to 500-mA Charge Current With Current Monitoring Output (ISET)
- Programmable Input Current Limit up to 500 mA for Wall Adapters
- Programmable Termination Current (bq24232)
- Programmable Precharge and Fast-Charge Safety Timers
- Reverse Current, Short-Circuit, and Thermal Protection
- NTC Thermistor Input
- Proprietary Start-Up Sequence Limits Inrush Current
- Status Indication – Charging/Done, Power Good
- Small 3 mm × 3 mm 16-Lead QFN Package
The bq2423x series of devices are highly integrated Li-ion linear chargers and system power-path management devices targeted at space-limited portable applications. The devices operate from either a USB port or ac adapter and support charge currents between 25 mA and 500 mA. The high-input-voltage range with input overvoltage protection supports low-cost, unregulated adapters. The USB input current limit accuracy and start-up sequence allow the bq2423x to meet USB-IF inrush current specification. Additionally, the input dynamic power management (VIN-DPM) prevents the charger from crashing poorly designed or incorrectly configured USB sources.
The bq2423x features dynamic power-path management (DPPM) that powers the system while simultaneously and independently charging the battery. The DPPM circuit reduces the charge current when the input current limit causes the system output to fall to the DPPM threshold, thus supplying the system load at all times while monitoring the charge current separately. This feature reduces the number of charge and discharge cycles on the battery, allows for proper charge termination, and enables the system to run with a defective or absent battery pack. Additionally, this enables instant system turn-on even with a totally discharged battery. The power-path management architecture also permits the battery to supplement the system current requirements when the adapter cannot deliver the peak system currents, enabling the use of a smaller adapter.
The battery is charged in three phases: conditioning, constant current, and constant voltage. In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if the internal temperature threshold is exceeded.
The charger power stage and charge current sense functions are fully integrated. The charger function has high-accuracy current and voltage regulation loops, charge status display, and charge termination. The input current limit and charge current are programmable using external resistors.
기술 자료
| 상위 문서 | 유형 | 직함 | 형식 옵션 | 최신 영어 버전 다운로드 | 날짜 | |
|---|---|---|---|---|---|---|
| * | 데이터 시트 | bq2423x USB-Friendly Lithium-Ion Battery Charger And Power-Path Management IC datasheet (Rev. J) | PDF | HTML | 2017. 4. 8 | ||
| 애플리케이션 노트 | Configuring Standalone Linear Power Path Chargers (Rev. A) | PDF | HTML | 2020. 4. 6 | |||
| 애플리케이션 노트 | BQ2423X external NTC control reference design | 2019. 3. 22 | ||||
| 애플리케이션 노트 | Dynamic Power-Path Mgmt & Dynamic Power Mgmt (Rev. A) | 2018. 5. 1 | ||||
| EVM User's guide | bq24072/3/4/5/9(T) and bq24230/2 1.5-A Single-Chip Li-Ion (Rev. E) | PDF | HTML | 2017. 1. 3 | |||
| 아날로그 디자인 학술지 | Battery-charging considerations for low-power applications | 2016. 4. 26 | ||||
| Product overview | Battery Management Solutions for Wearable and Fitness Devices (Rev. C) | 2014. 8. 18 | ||||
| 추가 자료 | Adapting Qi-compliant wireless-power solutions to low-power wearable products | 2014. 6. 6 | ||||
| 애플리케이션 노트 | Selecting the Best bq2407x/23x Single Cell Battery Charger for your Application | 2012. 11. 8 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
BQ24232EVM — BQ24232 평가 모듈
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IoT(사물 인터넷) 혁신은 애플리케이션과 기기를 효율적으로 연결하여 배터리로 구동되는 광범위한 초저전력 센서 배포를 가능하게 했습니다. TI의 첨단 센서 및 저전력 연결 장치와 같은 새로운 기술을 통해 배터리 구동 무선 시스템으로 이러한 기기를 설계할 수 있어 비용, 배포, 안정성, 성능 및 복잡성이 획기적으로 개선되고 있습니다.
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| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VQFN (RGT) | 16 | Ultra Librarian |
주문 및 품질
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.