产品详细信息

Number of series cells 1, 2, 3, 4, 5, 6, 7, 8 Charge current (Max) (A) 10 Operating Vin (Max) (V) 28 Cell chemistry SuperCap Battery charge voltage (Min) (V) 2.1 Battery charge voltage (Max) (V) 26 Absolute Vin (safety rating) (Max) ((V)) 33 Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Operating Vin (Min) (V) 5 Rating Catalog
Number of series cells 1, 2, 3, 4, 5, 6, 7, 8 Charge current (Max) (A) 10 Operating Vin (Max) (V) 28 Cell chemistry SuperCap Battery charge voltage (Min) (V) 2.1 Battery charge voltage (Max) (V) 26 Absolute Vin (safety rating) (Max) ((V)) 33 Control interface Standalone (RC-Settable) Features BAT temp thermistor monitoring (hot/cold profile) Operating Vin (Min) (V) 5 Rating Catalog
VQFN (RVA) 16 12 mm² 3.5 x 3.5
  • 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
  • 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

  • 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
  • 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.

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.

下载

技术文档

star = 有关此产品的 TI 精选热门文档
未找到结果。请清除搜索,并重试。
查看全部 8
类型 项目标题 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 31 Jul 2015
应用手册 BQ241xx/BQ246xx Selection of Multi-Cell Standalone Switching Battery Chargers 31 Dec 2019
技术文章 When to use rechargeable batteries in small battery applications 01 Oct 2019
选择指南 电源管理指南 2018 (Rev. K) 31 Jul 2018
技术文章 Should I use a linear charger or a switching charger? 31 Oct 2015
技术文章 Supercapacitors-the solution for back-up power 17 Jul 2015
技术文章 Summertime and the livin' is easy 20 Jun 2014
用户指南 Multi Cell Synchronous Switch-Mode Charger, EVM (HPA421) 18 Feb 2010

设计和开发

如需其他信息或资源,请查看下方列表,点击标题即可进入详情页面。

评估板

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 (...)

用户指南: PDF
TI.com 無法提供
计算工具

bq246xx Calculation Tool V1.5 (Rev. D)

SLUC175D.ZIP (782 KB)
参考设计

PMP7327 — 28Vdc Input Super Cap Charger with Boost Converter for Bus Holdup

此参考设计使用 BQ24640 超级电容器充电控制器来为一大堆超级电容器充电,使这些电容器的电压低于输入总线电压。在输入总线压差期间,超级电容器的电量用于为升压转换器供电,可提 供 10A 的输出电流 (26.2V)。此输出电流可用于保持总线电压长达 10 秒(即保持 260W 10 秒)。
原理图: PDF
封装 引脚数 下载
VQFN (RVA) 16 了解详情

订购和质量

包含信息:
  • 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
  • 认证摘要
  • 持续可靠性监测

推荐产品可能包含与 TI 此产品相关的参数、评估模块或参考设计。

支持与培训

视频