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.
技術文件
| 重要文件 | 類型 | 標題 | 格式選項 | 下載最新的英文版本 | 日期 | |
|---|---|---|---|---|---|---|
| * | 資料表 | bq24640 High-Efficiency Synchronous Switched-Mode Super Capacitor Charger datasheet (Rev. A) | PDF | HTML | 2015/7/31 | ||
| 應用說明 | How to Quickly and Safely Charge Supercapacitors | PDF | HTML | 2023/3/27 | |||
| 應用說明 | BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers | 2019/12/31 |
設計與開發
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BQ24640EVM — 用於 BQ24640 多芯同步切換模式充電器的評估模組
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 (...)
SLUC175 — bq246xx Calculation Tool V1.5
PMP7327 — 適用於總線維持，具有升壓轉換器的 28V DC 輸入超級電容充電器參考設計
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 (...)
| 封裝 | 針腳 | CAD 符號、佔位空間與 3D 模型 |
|---|---|---|
| VQFN (RVA) | 16 | Ultra Librarian |
訂購與品質
建議產品可能具有與此 TI 產品相關的參數、評估模組或參考設計。