首页 > TI 德州仪器 > 电源管理 > 电池管理

BQ24640 用于超级电容器的高效同步开关模式电池充电控制器

BQ24640 描述

The bq24640 is highly integrated switch-mode super capacitor charge controller. It offers a constant- frequency synchronous PWM controller with high accuracy charge current and voltage regulation, and charge status monitoring.

The bq24640 charges super capacitor in two phases: constant current and constant voltage. The charge starts from down to 0V with current set on ISET pin. The charge current starts tapering down, when the voltage on VFB reaches an internal reference.

The bq24640 enters a low-current sleep mode (<15µA) when the input voltage falls below the output capacitor voltage.

The bq24640 has input CE pin to enable and disable charge, and two output pins, STAT and PG, to report charge and adapter status

	BQ24600	BQ24610	BQ24617	BQ24620	BQ24630	BQ24640
# Series Cells	1-6	1-6	1-5	1-7	1-7	1-9
Charge Current(Max)(A)	10	10	10	10	10	10
Switching Frequency(kHz)	1200	600	600	300	300	600
Primary Charge Termination Method	Minimum Current	Minimum Current	Minimum Current	Minimum Current	Minimum Current	Minimum Current
Pin/Package	16VQFN	24VQFN	24VQFN	16VQFN	24VQFN	16VQFN
Vin(Max)(V)	28	28	24	28	28	28
Battery Charge Voltage(V)	Stand-alone	Stand-alone	Stand-alone	Stand-alone	Stand-alone	Stand-alone
Optional Functions		Power Path	Power Path		Power Path	Super Capacitor Pack: 2.1V to 26V

BQ24640 特性

• Charge Super Capacitor Pack from 2.1V to 26V
• CC–CV Charge Profile from 0V Without Precharge
• 600kHz NMOS-NMOS Synchronous Buck Controller
• Over 90% Efficiency for up to 10A Charge Current
• 5V–28V 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 Over-Voltage Protection
  • Capacitor Temperature Sensing Hot/Cold Charge Suspend
  • Thermal Shutdown
• Status Outputs
  • Adapter Present
  • Charger Operation Status
• Charge Enable Pin
• 30ns Driver Dead Time and 99.5% Max Effective Duty Cycle

BQ24640 芯片订购指南

器件	状态	温度	价格（美元）	封装 | 引脚	封装数量 | 封装载体	丝印标记
BQ24640RVAR	ACTIVE	-40 to 85	3.75 | 100u	VQFN (RVA) | 16	3000 | LARGE T&R	OGA
BQ24640RVAT	ACTIVE	-40 to 85	4.35 | 100u	VQFN (RVA) | 16	250 | SMALL T&R	OGA

BQ24640 质量与无铅数据

器件	环保计划*	铅/焊球涂层	MSL 等级/回流焊峰	环保信息与无铅 (Pb-free)	DPPM / MTBF / FIT 率
BQ24640RVAR	Green (RoHS & no Sb/Br)	SNAGCU	Level-2-260C-1 YEAR	BQ24640RVAR	BQ24640RVAR
BQ24640RVAT	Green (RoHS & no Sb/Br)	SNAGCU	Level-2-260C-1 YEAR	BQ24640RVAT	BQ24640RVAT

BQ24640 应用技术支持与电子电路设计开发资源下载

1. BQ24640 数据资料 dataSheet 下载.PDF
2. TI 德州仪器电池管理产品选型与价格 . xls
3. 照明和显示屏电源选择指南 (PDF 1427 KB)
4. QFN Layout Guidelines (PDF 1279 KB)
5. 笔记本电脑指南 (Rev. A) (PDF 2774 KB)
6. 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)   (PDF  2206 KB)
7. PowerPAD™ Made Easy (PDF 57 KB)
8. 标准线性产品交叉参考 (Rev. D)   (PDF  1058 KB)
9. 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
10. 所选封装材料的热学和电学性质 (PDF 645 KB)
11. 高速数据转换 (PDF 1967 KB)

BQ24640 相关工具

名称	型号	公司	工具/软件类型
用于 BQ24640 多节同步开关模式充电器的评估模块	BQ24640EVM	Texas Instruments	开发电路板/EVM
BQ24640 评估模块	BQ24640EVM-337	Texas Instruments	开发电路板/EVM