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.
技术文档
类型 | 标题 | 下载最新的英语版本 | 日期 | |||
---|---|---|---|---|---|---|
* | 数据表 | bq24640 High-Efficiency Synchronous Switched-Mode Super Capacitor Charger 数据表 (Rev. A) | PDF | HTML | 2015年 7月 31日 | ||
应用手册 | 如何快速安全地为超级电容器充电 | PDF | HTML | 英语版 | PDF | HTML | 2023年 3月 28日 | |
应用手册 | BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers | 2019年 12月 31日 | ||||
选择指南 | 电源管理指南 2018 (Rev. K) | 2018年 7月 31日 | ||||
用户指南 | Multi Cell Synchronous Switch-Mode Charger, EVM (HPA421) | 2010年 2月 18日 |
设计和开发
如需其他信息或资源,请点击以下任一标题进入详情页面查看(如有)。
BQ24640EVM — 用于 BQ24640 多节同步开关模式充电器的评估模块
bq24600/bq24620/bq24640 评估模块。bq2461x 是高度集成的锂离子或锂聚合物开关模式电池充电控制器。bq2463x 是高度集成的开关模式电池充电控制器,专为磷酸锂电池化学物充电而设计。bq24640 是高度集成的超级电容器开关模式充电控制器。它们可以为恒频同步 PWM 控制器提供高准确度充电电流和电压调节、适配器电流调节、终止、充电预处理和充电状态监控。bq24600/bq24620 (...)
封装 | 引脚 | CAD 符号、封装和 3D 模型 |
---|---|---|
VQFN (RVA) | 16 | Ultra Librarian |
订购和质量
- RoHS
- REACH
- 器件标识
- 引脚镀层/焊球材料
- MSL 等级/回流焊峰值温度
- MTBF/时基故障估算
- 材料成分
- 鉴定摘要
- 持续可靠性监测
- 制造厂地点
- 封装厂地点
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