BQ24741 具有低 IQ 和精确涓流充电功能的多节同步开关模式充电器
BQ24741 描述
The bq24741/2 is a high-efficiency, synchronous battery charger with integrated compensation, offering low component count for space-constrained Li-ion or Li-polymer battery charging applications. Ratiometric charge current and voltage programming allows high regulation accuracies, and can be either hardwired with resistors or programmed by the system power-management microcontroller using a DAC or GPIOs.
The bq24741/2 charges two, three, or four series Li+ cells, supporting up to 10 A of charge current, and is available in a 28-pin, 5x5-mm2 thin QFN package.
The bq24741/2 features resistor-programmable PWM switching frequency and accurate 150mA trickle charge (with 20 m sensing resistor), which can be enabled via the TRICKLE pin.
|
BQ24741 |
BQ24742 |
| # Series Cells |
2-4 |
2-4 |
| Charge Current(Max)(A) |
10 |
10 |
| Charge Status Outputs |
1 |
1 |
| Control Topology |
Switchmode |
Switchmode |
| Switching Frequency(kHz) |
300-800 |
300-800 |
| Primary Charge Termination Method |
Host Controlled |
Host Controlled |
| Pin/Package |
28VQFN |
28VQFN |
| Vin(Max)(V) |
24 |
24 |
| Battery Charge Voltage(V) |
18 |
18 |
| Optional Functions |
Trickle Charge |
|
BQ24741 特性
- NMOS-NMOS Synchronous Buck Converter
- Resistor-Programmable Switching Frequency between 300 kHz and 800 kHz
- 9 V-24 V Input Voltage Operation Range
- Support Two to Four Cells
- Analog Inputs with Ratiometric Programming via Resistors or DAC/GPIO
- Charge Voltage (4-4.512 V/cell)
- Charge Current (up to 10 A)
- Adapter Current Limit for DPM
- High-Accuracy Voltage and Current Regulation
- ±0.5% Charge Voltage Accuracy
- ±3% Charge Current Accuracy
- ±3% Adapter Current Accuracy
- ±2% Input Current Sense Amp Accuracy
- 150 mA Trickle-charge Current with ±33% Accuracy Down to Zero Battery Voltage
- Safety Protection
- Input Overvoltage Protection
- Battery Overvoltage Protection
- Charger Overcurrent Protection
- Thermal Shutdown Protection
- FET/Inductor/Battery Short Protection
BQ24741 芯片订购指南
| 器件 |
状态 |
温度 (oC) |
价格（美元） |
封装 | 引脚 |
封装数量 | 封装载体 |
丝印标记 |
| BQ24741RHDR |
ACTIVE |
-40 to 155 |
2.30 | 1ku |
VQFN (RHD) | 28 |
3000 | LARGE T&R |
|
| BQ24741RHDT |
ACTIVE |
-40 to 155 |
2.65 | 1ku |
VQFN (RHD) | 28 |
250 | SMALL T&R |
|
BQ24741 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 |
| BQ24741RHDR |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ24741RHDR |
BQ24741RHDR |
| BQ24741RHDT |
Green (RoHS & no Sb/Br) |
CU NIPDAU |
Level-2-260C-1 YEAR |
BQ24741RHDT |
BQ24741RHDT |
BQ24741 应用技术支持与电子电路设计开发资源下载
- BQ24741 数据资料 dataSheet 下载.PDF
- TI 德州仪器电池管理产品选型与价格 . xls
- 照明和显示屏电源选择指南 (PDF 1427 KB)
- QFN Layout Guidelines (PDF 1279 KB)
- 笔记本电脑指南 (Rev. A) (PDF 2774 KB)
- 全面认识开关型电源中的BUCK-BOOST功率级 (Rev. A)
(PDF 2206 KB)
- PowerPAD™ Made Easy (PDF 57 KB)
- 标准线性产品交叉参考 (Rev. D)
(PDF 1058 KB)
- 模数规格和性能特性术语表 (Rev. A) (PDF 1993 KB)
- 所选封装材料的热学和电学性质 (PDF 645 KB)
- 高速数据转换 (PDF 1967 KB)
BQ24741 相关工具
| 名称 |
型号 |
公司 |
工具/软件类型 |
| 用于多节同步笔记本充电器的 BQ24741EVM |
BQ24741EVM |
Texas Instruments |
开发电路板/EVM |
| BQ24741 评估模块 |
BQ24741EVM-046 |
Texas Instruments |
开发电路板/EVM |
| BQ24741 评估模块 |
BQ24741EVM-097 |
Texas Instruments |
开发电路板/EVM |
