BQ24725
- SMBus Host-Controlled NMOS-NMOS Synchronous Buck Converter with
Programmable 615kHz, 750kHz, and 885kHz Switching Frequencies - Automatic N-channel MOSFET Selection of System Power Source from
Adapter or Battery Driven by Internal Charge Pumps - Enhanced Safety Features for Over Voltage Protection, Over Current
Protection, Battery, Inductor and MOSFET Short Circuit Protection - Programmable Input Current, Charge Voltage, Charge Current Limits
- ±0.5% Charge Voltage Accuracy up to 19.2V
- ±3% Charge Current Accuracy up to 8.128A
- ±3% Input Current Accuracy up to 8.064A
- ±2% 20x Adapter Current or Charge Current Amplifier
Output Accuracy
- Programmable Battery Depletion Threshold, and Battery LERAN Function
- Programmable Adapter Detection and Indicator
- Integrated Soft Start
- Integrated Loop Compensation
- Real Time System Control on ILIM pin to Limit Charge Current
- AC Adapter Operating Range 9V-24V
- 5µA Off-State Battery Discharge Current
- 20-pin 3.5 × 3.5 mm2 QFN Package
- APPLICATIONS
- Portable Notebook Computers, UMPC, Ultra-Thin Notebook, and Netbook
- Personal Digital Assistant
- Handheld Terminal
- Industrial and Medical Equipment
- Portable Equipment
PowerPAD is a trademark of Texas Instruments.
The bq24725 is a high-efficiency, synchronous battery charger, offering low component count for space-constraint, multi-chemistry battery charging applications.
The bq24725 uses two charge pumps to separately drive n-channel MOSFETs (ACFET, RBFET and BATFET) for automatic system power source selection.
SMBus controlled input current, charge current, and charge voltage DACs allow for high regulation accuracies that can be programmed by the system power management micro-controller.
The bq24725 uses internal input current register or external ILIM pin to throttle down PWM modulation to reduce the charge current.
The bq24725 charges two, three or four series Li+ cells, and is available in a 20-pin, 3.5 × 3.5 mm2 QFN package.
기술 자료
유형 | 직함 | 날짜 | ||
---|---|---|---|---|
* | Data sheet | 2-4Cell Li+ Battery SMBus Charge Controller with N-Channel Power MOSFET Selector datasheet (Rev. A) | 2010/11/09 | |
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.
SLUC203 — bq24725_725A_726_707_73x Calculation Tool
지원되는 제품 및 하드웨어
제품
배터리 충전기 IC
패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
---|---|---|
VQFN (RGR) | 20 | Ultra Librarian |
주문 및 품질
- RoHS
- REACH
- 디바이스 마킹
- 납 마감/볼 재질
- MSL 등급/피크 리플로우
- MTBF/FIT 예측
- 물질 성분
- 인증 요약
- 지속적인 신뢰성 모니터링
- 팹 위치
- 조립 위치
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.