BQ24157
- Power Up System without Battery
- Charge Faster than Linear Chargers
- High-Accuracy Voltage and Current Regulation
- Input Current Regulation Accuracy: ±5% (100 mA and 500 mA)
- Charge Voltage Regulation Accuracy: ±0.5% (25°C), ±1% (0°C to 125°C)
- Charge Current Regulation Accuracy: ±5%
- Input Voltage Based Dynamic Power Management (VIN DPM)
- Bad Adaptor Detection and Rejection
- Safety Limit Register for Maximum Charge Voltage and Current Limiting
- High-Efficiency Mini-USB/AC Battery Charger for Single-Cell Li-Ion and Li-Polymer Battery Packs
- 20-V Absolute Maximum Input Voltage Rating
- 6.5-V Maximum Operating Input Voltage
- Built-In Input Current Sensing and Limiting
- Integrated Power FETs for Up To 1.55-A Charge Rate
- Programmable Charge Parameters through I2C™ Compatible Interface (up to 3.4 Mbps):
- Input Current Limit
- VIN DPM Threshold
- Fast-Charge/Termination Current
- Charge Regulation Voltage (3.5 V to 4.44 V)
- Low Charge Current Mode Enable/Disable
- Termination Enable/Disable
- Support up to 1.55A Charge Current using 55 mΩ Sensing Resistor
- Synchronous Fixed-Frequency PWM Controller Operating at 3 MHz With 0% to 99.5% Duty Cycle
- Automatic High Impedance Mode for Low Power Consumption
- Robust Protection
- Reverse Leakage Protection Prevents Battery Drainage
- Thermal Regulation and Protection
- Input/Output Overvoltage Protection
- Status Output for Charging and Faults
- USB Friendly Boot-Up Sequence
- Automatic Charging
- Boost Mode Operation for USB OTG
- Input Voltage Range (from Battery): 3.2 V to 4.5 V
- 2.1 mm x 2 mm 20-Pin WCSP Package
The bq24157 is a compact, flexible, high-efficiency, USB-friendly switch-mode charge management device for single-cell Li-ion and Li-polymer batteries used in a wide range of portable applications. The charge parameters can be programmed through an I2C interface. The IC integrates a synchronous PWM controller, power MOSFETs, input current sensing, high-accuracy current and voltage regulation, and charge termination, into a small WCSP package.
The IC charges the battery in three phases: conditioning, constant current and constant voltage. The input current is automatically limited to the value set by the host. Charge is terminated based on battery voltage and user-selectable minimum current level. A safety timer with reset control provides a safety backup for I2C interface. During normal operation, The IC automatically restarts the charge cycle if the battery voltage falls below an internal threshold and automatically enters sleep mode or high impedance mode when the input supply is removed. The charge status can be reported to the host using the I2C interface. During the charging process, the IC monitors its junction temperature (TJ) and reduces the charge current once TJ increases to about 125°C. To support USB OTG device, bq24157 can provide VBUS (5.05 V) by boosting the battery voltage. The IC is available in 20-pin WCSP package.
기술 자료
| 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | bq24157 Fully Integrated Switch-Mode Charger With USB Compliance and USB-OTG Support datasheet (Rev. E) | PDF | HTML | 2018/01/03 |
| White paper | Understanding Functional Safety FIT Base Failure Rate Estimates per IEC 62380 and SN 29500 (Rev. A) | PDF | HTML | 2024/04/30 | |
| Application note | Battery Charger Overload Protection in Boost Mode Operation | 2017/07/12 | ||
| Application note | Achieving the Optimal Thermal Performance for Chip Scale Package | 2017/01/10 | ||
| User guide | bq24153A/56A/57/58/59EVM Fully Integrated, Switch-Mode, One-Cell, Li-Ion Chgr (Rev. C) | 2014/05/12 | ||
| Application note | Building your own Battery Simulator | 2013/10/14 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
BQ24157EVM-697 — BQ24157EVM-697 평가 모듈
| 패키지 | 핀 | CAD 기호, 풋프린트 및 3D 모델 |
|---|---|---|
| DSBGA (YFF) | 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.