계산 툴
BQ24640
- Charge Super Capacitor Pack From 2.1 V to 26 V
- CC/CV Charge Profile From 0 V Without
Precharge - 600-kHz NMOS-NMOS Synchronous Buck
Controller - Over 90% Efficiency for up to 10-A Charge
Current - 5-V to 28-V VCC Input Voltage Range
- Accuracy
- ±0.5% Charge Voltage Regulation
- ±3% Charge Current Regulation
- High Integration
- Internal Loop Compensation
- Internal Digital Soft Start
- Safety
- Input Overvoltage Protection
- Capacitor Temperature Sensing Hot and Cold
Charge Suspend - Thermal Shutdown
- Status Outputs
- Adapter Present
- Charger Operation Status
- Charge Enable Pin
- 30-ns Driver Dead Time and 99.5% Maximum
Effective Duty Cycle - Automatic Sleep Mode for Low Power
Consumption- <15-µA Off-State Super Capacitor Discharge
Current - <1.5-mA Off-State Input Quiescent Current
- <15-µA Off-State Super Capacitor Discharge
- APPLICATIONS
- Memory Backup Systems
- Industrial UPS Systems and Power Transient Buffering
- Bridge Power to Buffer the Battery
All other trademarks are the property of their respective owners
The bq24640 device is a highly integrated switched-mode super capacitor charge controller. The device offers a constant-frequency synchronous PWM controller with high accuracy charge current, voltage regulation, and charge status monitoring.
The bq24640 charges a super capacitor in two phases: constant current and constant voltage (CC/CV). The device can charge super capacitors from 0 V with current set on the ISET pin. When the super capacitor voltage reaches the programmed target voltage, charge current begins tapering down.
The bq24640 enters a low-current sleep mode
(<15 µA) when the input voltage falls below the output capacitor voltage.
The bq24640 has an input CE pin to enable and disable charge, and the STAT and PG output pins report charge and adapter status. The TS pin on the bq24640 monitors the temperature of the capacitor and suspends charge during hot and cold conditions.
기술 문서
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모두 보기4 | 유형 | 직함 | 날짜 | ||
|---|---|---|---|---|
| * | Data sheet | bq24640 High-Efficiency Synchronous Switched-Mode Super Capacitor Charger datasheet (Rev. A) | PDF | HTML | 2015/07/31 |
| Application note | How to Quickly and Safely Charge Supercapacitors | PDF | HTML | 2023/03/27 | |
| Application note | BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers | 2019/12/31 | ||
| User guide | Multi Cell Synchronous Switch-Mode Charger, EVM (HPA421) | 2010/02/18 |
설계 및 개발
추가 조건 또는 필수 리소스는 사용 가능한 경우 아래 제목을 클릭하여 세부 정보 페이지를 확인하세요.
평가 보드
BQ24640EVM — BQ24640 멀티 셀 동기 스위치 모드 충전기용 평가 모듈
Evaluation Module for bq24600/bq24620/bq24640. the bq24600 is a highly integrated Li-ion or Li-polymer switch-mode battery charge controller. The bq24620 is highly integrated switch-mode battery charge controller designed specifically to charge Lithium Phosphate battery chemistries. The bq24640 is (...)
사용 설명서: PDF
레퍼런스 디자인
PMP7327 — 버스 홀더용 부스트 컨버터가 포함된 28Vdc 입력 슈퍼캡 충전기 레퍼런스 디자인
This reference design uses the BQ24640 super cap charging controller to charge a large bank of super caps to a voltage below the input bus voltage. During an input bus dropout, the energy from the super caps is used to power a boost converter that can supply 10A of output current at 26.2V. This (...)
| 패키지 | 핀 | 다운로드 |
|---|---|---|
| VQFN (RVA) | 16 | 옵션 보기 |
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
권장 제품에는 본 TI 제품과 관련된 매개 변수, 평가 모듈 또는 레퍼런스 디자인이 있을 수 있습니다.