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参数资料
| 型号： | DS2777G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/46页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE LI+ 2CELL 14-TDFN |
| 产品培训模块： | 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： | 4 V ~ 9.2 V |
| 工作温度： | -20°C ~ 70°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： | 1436 (CN2011-ZH PDF) |
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2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
full with a resolution of 2 -10 . Standby empty at +40°C is,
by definition, zero and therefore no storage is required.
The slopes (derivatives) of the four 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 (refer to 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 3.
Application Parameters
In addition to cell model characteristics, several appli-
cation parameters are needed to detect the full and
empty points, as well as calculate results in mAh units.
Sense Resistor Prime (RSNSP)
RSNSP stores the value of the sense resistor for use in
computing the absolute capacity results. The value is
stored as a 1-byte conductance value with units of
mhos (1/ Ω ). RSNSP supports resistor values of 1 Ω to
3.922m Ω . RSNSP is located in the parameter EEPROM
block.
RSNSP = 1/R SNS (units of mhos; 1/ Ω )
CELL MODEL
PARAMETERS
FULL(T)
Charge Voltage (VCHG)
(EEPROM)
TEMPERATURE
LOOKUP
FUNCTION
AE(T)
SE(T)
VCHG stores the charge voltage threshold used to
detect a fully charged state. The voltage is stored as a
1-byte value with units of 19.5mV and can range from 0
to 4.978V. VCHG should be set marginally less than the
average cell voltage at the end of the charge cycle to
Figure 15. Lookup Function Diagram
ensure reliable charge termination detection. VCHG is
located in the parameter EEPROM block.
Table 3. Example Cell Characterization Table (Normalized to +40°C)
Manufacturer’s Rated Cell Capacity: 1000mAh
Charge Voltage: 4.2V
Active Empty (V): 3.0V
Sense Resistor: 0.020
SEGMENT BREAKPOINTS
TBP12 = -12°C
TBP23 = 0°C
TBP34 = 18°C
Termination Current: 50mA
Standby Empty (I): 300mA
CALCULATED VALUE
Full
Active Empty
Standby Empty
+40°C NOMINAL
(mAh)
1051
SEGMENT 1
(ppm/°C)
3601
2380
1404
SEGMENT 2
(ppm/°C)
3113
1099
427
SEGMENT 3
(ppm/°C)
1163
671
244
SEGMENT 4
(ppm/°C)
854
305
183
______________________________________________________________________________________
21
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2777G+ | 功能描述:电池管理 2-Cell Stand-Alone Li+ 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 |
| DS2777G+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:2S FG PROT 2W 14L 3X5 TDFN T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC FUEL GAUGE LI+ 2CELL 14-TDFN 制造商:Maxim Integrated Products 功能描述:Battery Management 2-Cell Stand-Alone Li+ Fuel-Gauge |
| DS2777G+T&R | 功能描述:电池管理 2-Cell Stand-Alone Li+ 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 |
| DS2777G+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication |
| DS2777GR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication |
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