BQ25176K
- Input voltage up to 30V tolerant
- Input Voltage Based Dynamic Power Management (VINDPM)
- Automatic Sleep Mode for low power consumption
- 350nA battery leakage current
- 80µA input leakage current when charge disabled
- Supports 1-cell Li-Ion, Li-Poly, and LiFePO4
- External resistor programmable operation
- VSET to set battery regulation voltage:
- Li-Ion: 4.05V, 4.35V, 4.4V, 4.53V, 4.58V
- LiFePO4: 3.5V, 3.6V, 3.7V
- ISET to set charge current from 10mA to 800mA
- VSET to set battery regulation voltage:
- High accuracy
- ±0.5% charge voltage accuracy
- ±10% charge current accuracy
- Charging features
- Precharge current 20% of ISET
- Termination current 10% of ISET
- NTC thermistor input to monitor battery temperature
- TS pin for charging operation control over JEITA range
- Open-drain output for status and fault indication
- Integrated fault protection
- 26V IN overvoltage protection
- VSET based OUT overvoltage protection
- 1000mA overcurrent protection
- 125°C thermal regulation; 150°C thermal shutdown protection
- OUT short-circuit protection
- VSET, ISET pins short/open protection
The BQ25176K is an integrated 800mA linear charger for 1-cell Li-Ion, Li-Polymer, and LiFePO4 batteries targeted at space-limited portable applications.The device has a single power output that charges the battery. The system load can be placed in parallel with the battery, as long as the average system load does not prevent the battery from charging fully within the safety timer duration. When the system load is placed in parallel with the battery, the charge current is shared between the system and the battery.
The device has four phases for charging a Li-Ion/Li-Poly battery: trickle charge to bring the battery voltage up to VBAT_SHORT, precharge to recover a fully discharged battery, fast-charge constant current to supply the bulk of the charge, and voltage regulation to reach full capacity.
In all charge phases, an internal control loop monitors the IC junction temperature and reduces the charge current if an internal temperature threshold, TREG, 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 automatic charge termination. The charge voltage and fast charge current are programmable through external resistors. The precharge and termination current threshold track the fast charge current setting.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | BQ25176K: 800mA JEITA-Compliant Linear Battery Charger For 1-Cell Li-Ion and LiFePO4 With VINDPM and 4.5V Battery datasheet | PDF | HTML | 2025/08/14 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
BQ25176KEVM — BQ25176K 평가 모듈
BQ25176K 평가 모듈(EVM)에는 평가 보드 작동에 필요한 BQ25176K IC, LDO TPS7B8133 및 지원 회로가 포함되어 있습니다. EVM에 전원을 공급하고 1셀 배터리를 충전하려면 외부 5V 전원 공급 장치가 필요합니다. 충전 전압 VREG는 스위치 S1을 사용하여 7개 값으로 설정할 수 있습니다. 충전 전류는 60mA~750mA 범위의 R22(ISET) 값에 의해 설정됩니다. 400mA의 고정값은 JP4에 의해 선택됩니다.
LDO U2(TPS7B8133)는 하우스키핑 전압 3.3V를 제공하며, LED를 구동하고 (...)
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| WSON (DSG) | 8 | 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.