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| 型号： | DS2746G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 6/17页 |
| 文件大小： | 0K |
| 描述： | IC MON BATTERY 2-WIRE 10-TDFN |
| 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）；镍金属氢化物（NiMH） |
| 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： | 10-WFDFN 裸露焊盘 |
| 供应商设备封装： | 10-TDFN-EP（3x3） |
| 包装： | 带卷 (TR) |
DS2746 Low-Cost 2-Wire Battery Monitor
Figure 3. Block Diagram
DETAILED DESCRIPTION
The DS2746 operates either in active mode where cell voltage, system current, and auxiliary inputs are monitored,
or in a low power sleep mode to conserve energy when the system is idle. While in active mode, the DS2746
contantly measures current flow through an external sense resistor. Each current measurement is reported with
sign and magnitude in a two-byte Current register. Offset bias and offset blanking features remove offset error from
the current A/D to improve measurement accuracy. Each current measurement is integrated into the Accumulated
Current register (ACR) to maintain a sum of all charge entering and exiting the cell.
The DS2746 has two auxiliary inputs to allow voltage sampling of resistor divider circuits. These can be used to
measure a thermistor or an ID resistor located inside the battery pack. The V OUT output provides the pullup voltage
for the resistor divider networks. The DS2746 disables V OUT after measuring the auxiliary inputs to reduce power
use by the measurement system. V OUT operation can be disabled through software to further reduce power
consumption when the auxiliary inputs are not in use.
A dedicated voltage A/D measures voltage of the cell and the auxiliary inputs. A mux on the input to the A/D cycles
through the V IN , AIN0, and AIN1 pins repeatedly in that order. An internal reference is used to measure V IN voltage.
AIN0 and AIN1 are measured as a percentage of V OUT . This ratiometric measurement of the Auxiliary inputs
prevents noise in the supply from affecting accuracy of the readings
The DS2746 measurements can be used directly to provide accurate fuel gauging in typical use conditions, or
along with FuelPack? algorithms to form a complete and accurate solution for estimating remaining capacity over
wide temperature and operating conditions.
Through its 2-Wire interface, the DS2746 allows a host system read/write access to the Status/Configuration
register and Measurement registers. If sleep mode operation is enabled, holding both interface lines low forces the
DS2746 into a low power sleep mode where A/D measurements are paused and the ACR register is maintained.
FuelPack is a trademark of Maxim Integrated Products, Inc.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2746K | 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 |
| DS275 | 功能描述:RS-232接口集成电路 RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| DS275+ | 功能描述:RS-232接口集成电路 Line-Powered RS-232 Transceiver Chip RoHS:否 制造商:Exar 数据速率:52 Mbps 工作电源电压:5 V 电源电流:300 mA 工作温度范围:- 40 C to + 85 C 安装风格:SMD/SMT 封装 / 箱体:LQFP-100 封装: |
| DS2751 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Multichemistry Fuel Garge |
| DS2751+ | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Multichemistry Fuel Garge |
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