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参数资料
| 型号： | DS2786BG+T&R |
| 厂商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分类： | 电源管理 |
| 英文描述： | 1-CHANNEL POWER SUPPLY SUPPORT CKT, PDSO10 |
| 封装： | 3 X 3 MM, ROHS COMPLIANT, TDFN-10 |
| 文件页数： | 21/21页 |
| 文件大小： | 363K |
| 代理商： | DS2786BG+T&R |
DS2786B
Stand-Alone OCV-Based Fuel Gauge
_______________________________________________________________________________________
9
Voltage Measurement
Battery voltage is measured at the VIN input with respect
to VSS over a 0 to 4.999V range and with a resolution of
1.22mV. The result is updated every 880ms and placed
in the Voltage Register in two’s-complement form.
Voltages above the maximum register value are reported
as 7FFFh. Figure 5 is the Voltage Register format.
The input impedance of VIN is sufficiently large
(> 15M
Ω) to be connected to a high-impedance volt-
age-divider in order to support multiple-cell applica-
tions. The pack voltage should be divided by the
number of series cells to present a single-cell average
voltage to the VIN input.
Every 1024th conversion, the ADC measures its input
offset to facilitate offset correction to improve voltage
accuracy. Offset correction occurs approximately every
15min. The resulting correction factor is applied to the
subsequent 1023 measurements. During the offset-cor-
rection conversion, the ADC does not measure the VIN
signal. The voltage measurement just prior to the offset
conversion is displayed in the Voltage Register. The
OCV algorithm automatically adjusts for the effects of
the offset-correction cycle.
Auxilary Input Measurements
The DS2786B has two auxiliary voltage-measurement
inputs, AIN0 and AIN1. Both are measured with respect
to VSS. These inputs are designed for measuring resis-
tor ratios, particularly useful for measuring thermistor or
pack identification resistors. Prior to the beginning of a
measurement cycle on AIN0 or AIN1, the VOUT pin out-
puts a reference voltage in order to drive a resistive
divider formed by a known resistor value, and the
unknown resistance to be measured. This technique
delivers good accuracy at a reasonable cost, as it
removes reference tolerance from the error calcula-
tions. Measurements alternate between each input.
Each auxiliary measurement is therefore updated every
1760ms and placed in the corresponding AIN0 or AIN1
Register in two’s-complement form. Figure 6 shows the
Auxiliary Input Registers format.
MSB—ADDRESS 0Ch
LSB—ADDRESS 0Dh
S
2
11
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
1
2
0
X
MSB
LSB
MSB
LSB
“S”: SIGN BIT, “X”: RESERVED
UNITS: 1.22mV
Figure 5. Voltage Register Format
AIN0
MSB—ADDRESS 08h
LSB—ADDRESS 09h
S
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
1
2
0
X
MSB
LSB
MSB
LSB
“S”: SIGN BIT, “X”: RESERVED
UNITS: VOUT × 1/2047
AIN1
MSB—ADDRESS 0Ah
LSB—ADDRESS 0Bh
S
2
10
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
1
2
0
X
MSB
LSB
MSB
LSB
“S”: SIGN BIT, “X”: RESERVED
UNITS: VOUT × 1/2047
Figure 6. Auxiliary Input Registers Format
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2786BK | 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 |
| DS2786G+ | 功能描述:电池管理 Stand-Alone OCV Based 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 |
| DS2786G+T&R | 制造商:Maxim Integrated Products 功能描述:STAND ALONE OCV BASED FUEL GAUGE LF - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC FUEL GAUGE OCV 10-TDFN 制造商:Maxim Integrated Products 功能描述:FUEL GAUGE STANDALONE OCV TDFN-10 制造商:Maxim Integrated Products 功能描述:FUEL GAUGE STANDALONE OCV, TDFN-10 |
| DS2786G+T&R | 功能描述:电池管理 Stand-Alone OCV Based 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 |
| DS2786G+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone OCV-Based Fuel Gauge |
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