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参数资料
| 型号： | DS2784G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 20/43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
Read and write access is allowed to the ACR. The ACR must be written MSB first then LSB. Whenever the ACR is
written, the fractional accumulation result bits are cleared. The write must be completed in 3.5s (one ACR update
period). A write to the ACR forces the ADC to perform an offset correction conversion and update the internal offset
correction factor. The current measurement and accumulation begin with the second conversion following a write to
the ACR.
The ACR value is backed up to EEPROM in case of power loss. The ACR value is recovered from EEPROM on
power-up. See Table 8 for specific address location and backup frequency.
ACCUMULATED CURRENT REGISTER FORMAT
MSB—ADDRESS 10h
LSB—ADDRESS 11h
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
MSb
LSb
MSb
LSb
Units: 6.25 μ Vh/R SNS
Table 5. Resolution and Range vs. Sense Resistor
V SS - V SNS
R SNS
20m ?
15m ?
10m ?
5m ?
Current Resolution
Current Range
ACR Resolution
ACR Range
1.5625 μ V
±51.2mV
6.25 μ Vh
409.6mVh
78.13 μ A
±2.56A
312.5 μ Ah
20.48Ah
104.2 μ A
±3.41A
416.7 μ Ah
27.31Ah
156.3 μ A
±5.12A
625 μ Ah
40.96Ah
312.5 μ A
±10.24A
1.250mAh
81.92Ah
ACCUMULATION BIAS
In some designs a systematic error or an application preference requires the application of an arbitrary bias to the
current accumulation process. The current accumulation bias register (CAB) allows a user-programmed constant
positive or negative polarity bias to be included in the current accumulation process. The value in CAB can be used
to estimate battery currents that do not flow through the sense resistor, estimate battery self-discharge or estimate
current levels below the current measurement resolution. The user programmed two’s complement value, with bit
weighting the same as the current register, is added to the ACR once per current conversion cycle. The CAB is
loaded on power-up from EEPROM memory.
The difference between the CAB and COB is that the CAB is not subject to current blanking. Offset currents
between 100μV and -25μV are not accumulated if the offset is made by the COB. Offset currents between 100μV
and -25μV are accumulated if they are made by the CAB.
CURRENT ACCUMULATION BIAS REGISTER FORMAT
ADDRESS 61h
S
2 6
2 5
2 4
2 3
2 2
2 1
2 0
MSb
“S”: Sign Bit
20 of 43
LSb
Units: 1.5625 μ V/R SNS
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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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