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参数资料
| 型号： | DS2731E+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/20页 |
| 文件大小： | 0K |
| 描述： | IC MANAGEMENT BACKUP 28-TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 备份管理 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 10.8 V ~ 13.2 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 28-SOIC（0.173"，4.40mm 宽）裸露焊盘 |
| 供应商设备封装： | 28-TSSOP 裸露焊盘 |
| 包装： | 带卷 (TR) |
Cache-Memory Battery-Backup Management IC
I
V
PRECHARGE
MODE
CHARGE
BEGIN
CONSTANT-CURRENT
MODE
CONSTANT-VOLTAGE
MODE
CHARGE
END
V PK
I CHARGE
V
I
10% x I CHARGE
V MIN
5% x I CHARGE
t
CHARGE TERMINATION
Figure 4. Li+ Battery Charging Characteristics
Constant-Current (CC) Mode
CC mode is entered either directly from initiate or after
precharge. Current is regulated based on the voltage
drop across an external 50m ? sense resistor and an
internal feedback circuit. The CC charge rate is set by
the RSET pin. It can be calculated by the following
formula:
I CHARGE = 2500/R
Where R is the value of the resistor connected to RSET.
The charge current can range from 0.5A to 1.5A.
The safety timer begins when CC mode is entered. If it
expires during CC mode, the charger enters a fault
state. If the current-sense feedback or RSET resistor is
shorted, the charger clamps current at I OVERCURRENT .
Li+ Charger CC Operation
Detailed Description
In CC mode, the CCCV charger regulates current by
monitoring the voltage drop across the SNS resistor.
The differential voltage measurement provides feed-
back that controls the switching of the high-side and
low-side FETs. Inside the DS2731 CHG1 and CHG2
pins are a high-side p-channel MOSFET (Q1) and a
low-side n-channel MOSFET (Q2). Q1 and Q2 alternate
on and off, either supplying current to the load and
inductor or providing a current loop for the inductor to
supply the load. The inductor charges during Q1 ON
and discharges during Q2 ON. The Q1 and Q2 switch-
ing is controlled by the voltage across R SNS .
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2731EVKIT+ | 制造商:Maxim Integrated Products 功能描述:12V A DC/DC CONVERTER - Boxed Product (Development Kits) |
| DS2731K | 功能描述:电源管理IC开发工具 RoHS:否 制造商:Maxim Integrated 产品:Evaluation Kits 类型:Battery Management 工具用于评估:MAX17710GB 输入电压: 输出电压:1.8 V |
| DS2733E+ | 功能描述:电池管理 BBU Power IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2733E+T&R | 制造商:Maxim Integrated Products 功能描述:BBU POWER IC 20-TSSOP T&R LF - Tape and Reel |
| DS2733E+T&R | 功能描述:电池管理 BBU Power IC RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
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