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参数资料
| 型号： | DS2784G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 22/43页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE STND-ALONE 14-TDFN |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 2.5 V ~ 4.6 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x5） |
| 包装： | 管件 |
| 产品目录页面： | 1437 (CN2011-ZH PDF) |
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DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
Figure 4. Cell Model Example Diagram
100%
SEGMENT 1
SEG. 2
SEG. 3
SEG. 4
SEG. 5
FULL
DERIVATIVE
[PPM/°C]
ACTIVE
EMPTY
STANDBY
EMPTY
CELL
CHARACTERIZATION
DATA POINTS
TBP12
TBP23
TBP34
40°C
empty value is stored as a percentage of +40°C full with a resolution of 2 . Standby empty at +40°C is, by
Full —The full curve defines how the full point of a given cell varies over temperature for a given charge termination.
The application’s charge termination method should be used to determine the table values. The DS2784
reconstructs the full line from the cell characteristic table to determine the full capacity of the battery at each
temperature. Reconstruction occurs in one-degree temperature increments.
Active Empty —The active-empty curve defines the variation of the active-empty point over temperature. The
active-empty point is defined as the minimum voltage required for system operation at a discharge rate based on a
high-level load current (one that is sustained during a high-power operating mode). This load current is
programmed as the active-empty current (IAE), and should be a 3.5s average value to correspond to values read
from the current register. The specified minimum voltage, or active empty voltage (VAE), should be a 220ms
average value to correspond to the values read from the voltage register. The DS2784 reconstructs the active
empty line from the cell characteristic table to determine the active empty capacity of the battery at each
temperature. Reconstruction occurs in one-degree temperature increments.
Standby Empty —The standby-empty curve defines the variation of the standby-empty point over temperature. The
standby-empty point is defined as the minimum voltage required for standby operation at a discharge rate dictated
by the application standby current. In typical handheld applications, standby empty represents the point that the
battery can no longer support DRAM refresh and thus the standby voltage is set by the minimum DRAM voltage-
supply requirements. In other applications, standby empty can represent the point that the battery can no longer
support a subset of the full application operation, such as games or organizer functions. The standby load current
and voltage are used for determining the cell characteristics but are not programmed into the DS2784. The DS2784
reconstructs the standby-empty line from the cell characteristic table to determine the standby-empty capacity of
the battery at each temperature. Reconstruction occurs in one-degree temperature increments.
CELL MODEL CONSTRUCTION
The model is constructed with all points normalized to the fully charged state at +40°C. All values are stored in the
cell parameter EEPROM block. The +40°C full value is stored in μVhr with an LSB of 6.25μVhr. The +40°C active
-10
definition, zero and, therefore, no storage is required. The slopes (derivatives) of the 4 segments for each model
curve are stored in the cell parameter EEPROM block as ppm/°C. The breakpoint temperatures of each segment
are stored there also (see Application Note 3584: Storing Battery Fuel Gauge Parameters in DS2780 for more
details on how values are stored). An example of data stored in this manner is shown in Table 6.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2784G R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication |
| DS2784G T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication |
| DS2784G+ | 功能描述:电池管理 Stand-Alone Fuel Gauge 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 |
| DS2784G+R | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell Stand-Alone Fuel Gauge IC with Li Protector and SHA-1 Authentication |
| DS2784G+T | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell Stand-Alone Fuel Gauge IC with Li Protector and SHA-1 Authentication |
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