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参数资料
| 型号： | DS2788E+T&R |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 7/32页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE W/DSP DRV 14TSSOP |
| 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 ~ 5.5 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-TSSOP（0.173"，4.40mm 宽） |
| 供应商设备封装： | 14-TSSOP |
| 包装： | 带卷 (TR) |
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Stand-Alone Fuel-Gauge IC with
LED Display Drivers
nection or system shutdown, in which no charge or dis-
charge current flows. A PMOD SLEEP condition transi-
tions back to ACTIVE mode when DQ is pulled high.
The second option for entering SLEEP is an undervolt-
age condition. When the UVEN bit is set, the DS2788
transitions to SLEEP if the voltage on V IN is less than
V SLEEP (2.45V nominal) and DQ is stable at a low or
high logic level for t SLEEP . An undervoltage condition
occurs when a pack is fully discharged, where loading
on the battery should be minimized. UVEN SLEEP
relieves the battery of the I ACTIVE load until communi-
cation on DQ resumes.
Note: PMOD and UVEN SLEEP features must be dis-
abled when a battery is charged on an external charger
that does not connect to the DQ pin. PMOD SLEEP can
be used if the charger pulls DQ high. UVEN SLEEP can
be used if the charger toggles DQ. The DS2788
remains in SLEEP and therefore does not measure or
accumulate current when a battery is charged on a
charger that fails to properly drive DQ.
Initiating Communication
in Sleep
When beginning communication with a DS2788 in
PMOD SLEEP, DQ must be pulled up first and then a
1-Wire reset pulse must be issued by the master. In
UVEN SLEEP, the procedure depends on the state of
DQ when UVEN SLEEP was entered. If DQ was low,
DQ must be pulled up and then a 1-Wire reset pulse
VOLT
MSB—ADDRESS 0Ch
must be issued by the master as with PMOD SLEEP. If
DQ was high when UVEN SLEEP was entered, then the
DS2788 is prepared to receive a 1-Wire reset from the
master. In the first two cases with DQ low during
SLEEP, the DS2788 does not respond to the first rising
edge of DQ with a presence pulse.
Voltage Measurement
Battery voltage is measured at the V IN input with
respect to V SS over a range of 0 to 4.5V, with a resolu-
tion of 4.88mV. The result is updated every 440ms and
placed in the Voltage (VOLT) register in two’s comple-
ment form. Voltages above the maximum register value
are reported at the maximum value; voltages below the
minimum register value are reported at the minimum
value. Figure 3 shows the format of the Voltage register.
V IN is usually connected to the positive terminal of a
single-cell Li+ battery by a 1k Ω resistor. The input
impedance is sufficiently large (15M Ω ) to be connected
to a high-impedance voltage-divider in order to support
multiple-cell applications. The pack voltage should be
divided by the number of series cells to present a sin-
gle-cell average voltage to the V IN input. In Figure 2,
the value of R can be up to 1M Ω without incurring sig-
nificant error due to input loading. The VMA pin is dri-
ven high t PRE before the voltage conversion begins.
This allows an external switching element to enable the
voltage-divider, and allows settling to occur before the
start of the conversion.
READ ONLY
LSB—ADDRESS 0Dh
S
2 9
2 8
2 7
2 6
2 5
2 4
2 3
2 2
2 1
2 0
X
X
X
X
X
MSb
“S ”: SIGN BIT(S), “X”: RESERVED
LSb
MSb
LSb
UNITS: 4.88mV
Figure 3. Voltage Register Format
_______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2788EVKIT+ | 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 |
| DS2788K | 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 |
| DS2790 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Programmable 1-Cell Li-Ion Fuel Gauge and Protector |
| DS2790E | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Programmable 1-Cell Li-Ion Fuel Gauge and Protector |
| DS2790E+ | 功能描述:IC FUEL GAUGE BATT 28TSSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 标准包装:1 系列:- 功能:充电管理 电池化学:锂离子（Li-Ion）、锂聚合物（Li-Pol） 电源电压:3.75 V ~ 6 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SC-74A，SOT-753 供应商设备封装:SOT-23-5 包装:剪切带 (CT) 产品目录页面:669 (CN2011-ZH PDF) 其它名称:MCP73831T-2ACI/OTCT |
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