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参数资料
| 型号： | DS2788E+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/32页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE W/DSP DRV 14TSSOP |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 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 ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 带卷 (TR) |
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Stand-Alone Fuel-Gauge IC with
LED Display Drivers
Active Empty: The active empty curve defines the tem-
perature variation in the empty point of the discharge
profile based on a high-level load current (one that is
sustained during a high-power operating mode) and
the minimum voltage required for system operation.
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
and the specified minimum voltage, or active empty
voltage (VAE) should be a 250ms average to corre-
spond to values read from the Voltage register. The
DS2788 reconstructs the active empty line from cell
characteristic table values to determine the active
empty capacity of the battery at each temperature.
Reconstruction occurs in one-degree temperature
increments. Active empty segment slopes are stored
the same as described for the full segments.
Standby Empty: The standby empty curve defines the
temperature variation in the empty point in the dis-
charge defined by the application standby current and
the minimum voltage required for standby operation.
The standby load current and voltage are used for
determining the cell characteristics but are not pro-
grammed into the DS2788. The DS2788 reconstructs
the standby empty line from cell characteristic table
values to determine the standby empty capacity of the
battery at each temperature. Reconstruction occurs in
one-degree temperature increments.
Cell Stack Model Construction
The model is constructed with all points normalized to
the fully charged state at +50°C. The cell parameter
EEPROM block stores the initial values, the +50°C full
value in mVh units, and the +50°C active empty value
as a fraction of the +50°C value. Standby empty at
+50°C is by definition zero and therefore no storage is
required. The slopes (derivatives) of the 4 segments for
each model curve are also stored in the cell parameter
EEPROM block along with the break point temperatures
of each segment. Table 1 shows an example of data
stored in this manner.
Standby empty represents the point that the battery
can no longer support a subset of the full application
operation, such as memory data retention or organizer
functions on a wireless handset. Standby empty seg-
ment slopes are stored the same as described for the
full segments.
CELL MODEL
PARAMETERS
15 BYTES
(EEPROM)
TEMPERATURE
LOOKUP
FUNCTION
FULL(T)
AE(T)
SE(T)
Figure 13. Lookup Function Diagram
Table 1. Example Cell Characterization Table (Normalized to +50°C)
Manufacturer’s Rated Cell Capacity: 1220mAh
Charge Voltage: 4.2V
Active Empty (V, I): 3.0V, 500mA
Sense Resistor: 0.020
SEGMENT BREAKPOINTS
TBP12 = -12°C
TBP23 = 0°C
Charge Current: 500mA
Termination Current: 50mA
Standby Empty (V, I): 3.0V, 4mA
CALCULATED VALUE
Full
Active Empty
Standby Empty
+50 ° C NOMINAL
(mAh)
1214
SEGMENT 1
(ppm/ ° C)
488
854
244
SEGMENT 2
(ppm/ ° C)
549
1526
183
SEGMENT 3
(ppm/ ° C)
1587
2686
916
SEGMENT 4
(ppm/ ° C)
2686
3113
244
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2788EVKIT+ | 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 |
| DS2788K | 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 |
| DS2790 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Programmable 1-Cell Li-Ion Fuel Gauge and Protector |
| DS2790E | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Programmable 1-Cell Li-Ion Fuel Gauge and Protector |
| DS2790E+ | 功能描述:IC FUEL GAUGE BATT 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
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