계산 툴
BQ24707
- SMBus Host-Controlled NMOS-NMOS
Synchronous Buck Converter With Programmable
615 kHz, 750 kHz, and 885 kHz Switching
Frequency - Real-Time System Control on ILIM Pin to Limit
Charge Current - Enhanced Safety Features for Overvoltage
Protection, Overcurrent Protection, Battery,
Inductor, and MOSFET Short-Circuit Protection - Programmable Input Current, Charge Voltage,
Charge Current Limits- ±0.5% Charge Voltage Accuracy up to 19.2 V
- ±3% Charge Current Accuracy up to 8.128 A
- ±3% Input Current Accuracy up to 8.064 A
- ±2% 20× Adapter Current or Charge Current
Output Accuracy
- Programmable Adapter Detection and Indicator
- Independent Comparator With Internal Reference
- Integrated Soft-Start
- Integrated Loop Compensation
- AC Adapter Operating Range 5 V to 24 V
- 15-µA Off-State Battery Discharge Current
- 20-pin 3.5 mm × 3.5 mm QFN Package
- bq24707: ACOK Delay Default 1.3 s
- bq24707A: ACOK Delay Default 1.2 ms
- APPLICATIONS
- Portable Notebook Computers, UMPCs, Ultra-Thin
Notebooks, and Netbooks - Personal Digital Assistants
- Handheld Terminals
- Industrial and Medical Equipment
- Portable Equipment
- Portable Notebook Computers, UMPCs, Ultra-Thin
All other trademarks are the property of their respective owners
The bq24707 and bq24707A devices are high-efficiency, synchronous battery chargers, offering low component count for space-constrained, multi-chemistry battery charging applications.
SMBus controlled input current, charge current, and charge voltage DACs allow for very high regulation accuracies that can be easily programmed by the system power management micro-controller.
The IC uses the internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.
The IC provides an IFAULT output to alarm if any MOSFET fault or input over current occurs. This alarm output allows users to turn off input power selectors when the fault occurs. Meanwhile, an independent comparator with internal reference is available to monitor input current, output current, or output voltage.
The IC charges one-, two-, three-, or four-series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm QFN package.
기술 자료
검색된 결과가 없습니다. 검색어를 지우고 다시 시도하십시오.
3개 모두 보기 | 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | bq24707x 1-4 Cell Li+ Battery SMBus Charge Controller With Independent Comparator and Advanced Circuit Protection datasheet (Rev. C) | PDF | HTML | 2015/07/31 |
| Application note | Autonomous Smart Battery Guide | PDF | HTML | 2021/10/15 | |
| Application note | How to Review a Multicell Switching Charger Schematic | 2011/09/21 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
레퍼런스 디자인
TIDA-00038 — 다중 셀 동기 스위치모드 레퍼런스 디자인
This reference design is a complete charger module for evaluating a multicell (1 to 4 cells) synchronous notebook charger using the bq24707 device. It is designed to deliver up to 4 A of charge current to Li-ion or Li-polymer applications. The charge current is programmable by an SMBus interface (...)
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| VQFN (RGR) | 20 | Ultra Librarian |
주문 및 품질
포함된 정보:
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
포함된 정보:
- 팹 위치
- 조립 위치