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| 型号： | DS2784G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 9/43页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE STND-ALONE 14-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）、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： | 带卷 (TR) |
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DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
TYPICAL OPERATING CIRCUIT
PIN DESCRIPTION
PIN
1
2
3
4
5, 9, 10
6
7
8
11
12
13
14
—
NAME
V DD
CTG
V SS
V IN
N.C.
PLS
CC
DC
DQ
SNS
CP
PIO
EP
FUNCTION
Power-Supply Input. Chip supply input. Bypass with 0.1μF to V SS .
Connect to Ground
Device Ground. Chip ground and battery-side sense resistor input.
Battery Voltage-Sense Input. Connect to positive cell terminal through decoupling
network.
No Connection
Pack Plus Terminal-Sense Input. Used to detect the removal of short-circuit, discharge
overcurrent, and charge overcurrent conditions.
Charge Control. Charge FET control output.
Discharge Control. Discharge FET control output.
Data Input/Output. Serial data I/O, includes weak pulldown to detect battery disconnect
and can be configured as wake input.
Sense Resistor Connection. Pack minus terminal and pack-side sense resistor sense
input.
Charge Pump Output. Bypass with 0.1μF to V SS .
Programmable I/O Pin. Can be configured as wake input.
Exposed Pad. Connect to V SS or leave unconnected.
DETAILED DESCRIPTION
The DS2784 functions as an accurate fuel gauge, Li+ protector, and SHA-1-based authentication token. The fuel
gauge provides accurate estimates of remaining capacity and reports timely voltage, temperature, and current-
measurement data. Capacity estimates are calculated from a piecewise-linear model of the battery performance
over load and temperature, and system parameters for full and empty conditions. The algorithm parameters are
user programmable and can be modified in pack. Critical capacity and aging data are periodically saved to
EEPROM in case of loss of power due to a short circuit or deep depletion.
The Li+ protection function ensures safe, high-performance operation. nFET protection switches are driven with a
9V charge pump that increase gate drive as the cell voltage decreases. The high-side topology preserves the
ground path for serial communication while eliminating the parasitic charge path formed when the fuel gauge IC is
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2784K | 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 |
| DS2786 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Standalone OCV-Based Fuel Gauge |
| DS2786_09 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone OCV-Based Fuel Gauge |
| DS2786B | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Stand-Alone OCV-Based Fuel Gauge |
| DS2786BEVKIT+ | 制造商:Maxim Integrated Products 功能描述:STANDALONE OCV-BASED FUEL GAUGE - Boxed Product (Development Kits) |
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