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参数资料
| 型号： | DS2781E+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 23/31页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE BATT 8TSSOP |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 1 |
| 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 ~ 10 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 8-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 8-TSSOP |
| 包装： | 管件 |
| 产品目录页面： | 1436 (CN2011-ZH PDF) |
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DS2781
Table 3. Parameter EEPROM Memory Block 1
ADDRESS
(HEX)
60
61
62
63
64
65
66
67
68
69
6A
6B
6C
6D
6E
6F
DESCRIPTION
CONTROL - Control Register
AB - Accumulation Bias
AC - Aging Capacity MSB
AC - Aging Capacity LSB
VCHG - Charge Voltage
IMIN - Minimum Charge Current
VAE - Active Empty Voltage
IAE - Active Empty Current
Active Empty 40
RSNSP - Sense Resistor Prime
Full 40 MSB
Full 40 LSB
Full Segment 4 Slope
Full Segment 3 Slope
Full Segment 2 Slope
Full Segment 1 Slope
ADDRESS
(HEX)
70
71
72
73
74
75
76
77
78
79
7A
7B
7C
7D
7E
7F
DESCRIPTION
AE Segment 4 Slope
AE Segment 3 Slope
AE Segment 2 Slope
AE Segment 1 Slope
SE Segment 4 Slope
SE Segment 3 Slope
SE Segment 2 Slope
SE Segment 1 Slope
RSGAIN - Sense Resistor Gain MSB
RSGAIN - Sense Resistor Gain LSB
RSTC - Sense Resistor Temp. Coeff.
COB – Current Offset Bias
TBP34
TBP23
TBP12
Reserved
1-Wire BUS SYSTEM
The 1-Wire bus is a system that has a single bus master and one or more slaves. A multidrop bus is a 1-Wire bus
with multiple slaves. A single-drop bus has only one slave device. In all instances, the DS2781 is a slave device.
The bus master is typically a microprocessor in the host system. The discussion of this bus system consists of four
topics: 64-bit net address, hardware configuration, transaction sequence, and 1-Wire signaling.
64-BIT NET ADDRESS
Each DS2781 has a unique, factory-programmed 1-Wire net address that is 64 bits in length. The first eight bits are
the 1-Wire family code ( 3Dh for DS2781). The next 48 bits are a unique serial number. The last eight bits are a
cyclic redundancy check (CRC) of the first 56 bits (see Figure 22). The 64-bit net address and the 1-Wire I/O
circuitry built into the device enable the DS2781 to communicate through the 1-Wire protocol detailed in the 1-Wire
Bus System section.
Figure 22. 1-Wire Net Address Format
8-BIT CRC
MSb
48-BIT SERIAL NUMBER
8-BIT FAMILY
CODE ( 3Dh )
LSb
CRC GENERATION
The DS2781 has an 8-bit CRC stored in the most significant byte of its 1-Wire net address. To ensure error-free
transmission of the address, the host system can compute a CRC value from the first 56 bits of the address and
compare it to the CRC from the DS2781. The host system is responsible for verifying the CRC value and taking
action as a result. The DS2781 does not compare CRC values and does not prevent a command sequence from
proceeding as a result of a CRC mismatch. Proper use of the CRC can result in a communication channel with a
very high level of integrity.
The CRC can be generated by the host using a circuit consisting of a shift register and XOR gates as shown in
Figure 23, or it can be generated in software. Additional information about the 1-Wire CRC is available in
Application Note 27: Understanding and Using Cyclic Redundancy Checks with Maxim iButton Products .
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2781E+ | 功能描述:电池管理 1-2 Cell 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 |
| DS2781E+T&R | 制造商:Maxim Integrated Products 功能描述:FUEL GAUGE 制造商:Maxim Integrated Products 功能描述:STANDALONE FUEL GAUGE IC 8TSSOP - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC FUEL GAUGE BATT 8TSSOP |
| DS2781E+T&R | 功能描述:电池管理 1-2 Cell 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 |
| DS2781E+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:1-Cell or 2-Cell Standalone Fuel Gauge IC |
| DS2781E-C1+T&R | 功能描述:电池管理 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 |
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