- 您现在的位置：买卖IC网 > PDF目录1788 > DS2784G+T&R (Maxim Integrated Products)IC FUEL GAUGE STND-ALONE 14-TDFN PDF资料下载
参数资料
| 型号： | DS2784G+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 11/43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) |
第1页第2页第3页第4页第5页第6页第7页第8页第9页第10页当前第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页第31页第32页第33页第34页第35页第36页第37页第38页第39页第40页第41页第42页第43页
DS2784: 1-Cell Stand-Alone Fuel Gauge IC with Li+ Protector and SHA-1 Authentication
POWER MODES
The DS2784 has two power modes: Active and Sleep. On initial power-up, the DS2784 defaults to Active mode. In
Active mode, the DS2784 is fully functional with measurements and capacity estimation registers continuously
updated. The protector circuit monitors the battery voltages and current for unsafe conditions. The protection FET
gate drivers are enabled when conditions are deemed safe. Also, the SHA-1 authentication function is available in
Active mode. When a SHA-1 computation is performed, the supply current increases to I DD3 for t SHA . In Sleep mode,
the DS2784 conserves power by disabling measurement and capacity estimation functions, but preserves register
contents. Gate drive to the protection FETs is disabled in Sleep. And the SHA-1 authentication feature is not
operational.
Sleep mode is entered under two different conditions: bus low and undervoltage. An enable bit makes entry into
Sleep optional for each condition. Sleep mode is not entered if a charger is connected (V PLS > V DD + 50mV) or if a
charge current of 1.6mV / R SNS is measured from SNS to V SS . The DS2784 exits Sleep mode upon charger
connection and V IN ≥ V UV or a low to high transition on DQ.
The bus-low condition, where the DQ pin is low for t SLEEP , indicates pack removal or system shutdown in which the
1-Wire bus pullup voltage, V PULLUP , is not present. The Power mode (PMOD) bit must be set to enter Sleep when a
bus-low condition occurs. After the DS2784 enters Sleep due to a bus-low condition, it is assumed that no charge
or discharge current will flow and that coulomb counting is unnecessary.
The second condition to enter Sleep is an undervoltage condition, which reduces battery drain due to the DS2784
supply current and prevents over discharging the cell. The DS2784 transitions to Sleep if the V IN voltage is less
than V UV (2.45V typical) and the undervoltage enable (UVEN) bit is set. The 1-Wire bus must be in a static state,
that is, with DQ either high or low for t SLEEP . The DS2784 transitions from UVEN Sleep to Active mode when DQ
changes logic state.
The DS2784 has the “power switch” capability for waking the device and enabling the protection FETs when the
host system is powered down. A simple dry-contact switch on the PIO pin or DQ pin can be used to wake up the
battery pack. The power switch function is enabled using the PSPIO and PSDQ configuration bits in the control
register. When PSPIO or PSDQ is set and a Sleep condition is satisfied, the PIO and DQ pins pull high weakly,
then become armed to detect a low-going transition. A 100ms debounce period filters out glitches that can be
caused when a sleeping battery is inserted into a system.
11 of 43
相关PDF资料 |
PDF描述 |
|---|---|
| DS2786BG+T&R | IC FUEL GAUGE OCV-BASED 10-TDFN |
| DS2786G-5+T&R | IC FUEL GAUGE OCV-BASED 10-TDFN |
| DS2788E+T&R | IC FUEL GAUGE W/DSP DRV 14TSSOP |
| DS2790G+T&R | IC FUEL GAUGE BATT 28-TDFN |
| DS3881E+T&R | IC CCFL CONTROL 24TSSOP |
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) |
发布紧急采购，3分钟左右您将得到回复。