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参数资料
| 型号： | DS2776G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 14/46页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE LI+ 2CELL 14-TDFN |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 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： | 4 V ~ 9.2 V |
| 工作温度： | -20°C ~ 70°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： | 管件 |
| 产品目录页面： | 1436 (CN2011-ZH PDF) |
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2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
Undervoltage (UV)
If the average of the voltages on (V IN2 - V IN1 ) or
(V IN1 - V SS ) drops below the undervoltage threshold,
V UV , for a period longer than undervoltage delay, t UVD ,
the DS2775–DS2778 shut off the charge and discharge
FETs. If UVEN is set, the DS2775–DS2778 also enter
sleep mode. When a charger is detected and V PLS >
V IN2 , the DS2775–DS2778 provide a current-limited
recovery charge path (I RC ) from PLS to V DD to gently
charge severely depleted cells. The recovery charge
path is enabled when 0 ≤ [(V IN2 - V IN1 ) and (V IN1 -
V SS )] < V CE . The FETs remain off until (V IN2 - V IN1 ) and
(V IN1 - V SS ) exceed V UV .
Overcurrent, Charge Direction (COC)
Charge current develops a negative voltage on V SNS
with respect to V SS . If V SNS is less than the charge
overcurrent threshold, V COC , for a period longer than
overcurrent delay, t OCD , the DS2775–DS2778 shut off
both external FETs. The charge current path is not re-
established until the voltage on the PLS pin drops
below (V DD - V TP ). The DS2775–DS2778 provide a test
current of value I PPD from PLS to V SS , pulling PLS
down, in order to detect the removal of the offending
charge current source.
Overcurrent, Discharge Direction (DOC)
Discharge current develops a positive voltage on V SNS
with respect to V SS . If V SNS exceeds the discharge
overcurrent threshold, V DOC , for a period longer than
t OCD , the DS2775–DS2778 shut off the external dis-
charge FET. The discharge current path is not reestab-
lished until the voltage on PLS rises above (V DD - V TP ).
MSB - ADDRESS 0Ch, V IN1 - V SS
MSB - ADDRESS 1Ch, V IN2 - V IN1
The DS2775–DS2778 provide a test current of value
I TST from V DD to PLS, pulling PLS up, in order to detect
the removal of the offending low-impedance load.
Short Circuit (SC)
If V SNS exceeds short-circuit threshold, V SC , for a
period longer than short-circuit delay, t SCD , the
DS2775–DS2778 shut off the external discharge FET.
The discharge current path is not reestablished until
the voltage on PLS rises above (V DD - V TP ). The
DS2775–DS2778 provide a test current of value I TST
from V DD to PLS, pulling PLS up, in order to detect the
removal of the short circuit.
All the protection conditions described are logic
ANDed to affect the CC and DC outputs.
CC = ( overvoltage ) AND ( undervoltage ) AND
( overcurrent , charge direction) AND (Protection register
bit CE = 0)
DC = ( undervoltage ) AND ( overcurrent , either direction)
AND ( short circuit ) AND (Protection register bit
DE = 0)
Voltage Measurements
Cell voltages are measured every 440ms. The lowest
potential cell, V IN1 , is measured with respect to V SS .
The highest potential cell, V IN2 , is measured with
respect to V IN1 . Battery voltages are measured with a
range of -5V to +4.9951V and a resolution of 4.8828mV
and placed in the Result register in two’s complement
form. Voltages above the maximum register value are
reported as 7FE0h.
LSB - ADDRESS 0Dh, V IN1 - V SS
LSB - ADDRESS 1Dh, V IN2 - V IN1
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
UNITS: 4.883mV
LSb
Figure 4. Voltage Register Format
14
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2776G+ | 功能描述:电池管理 2-Cell Stand-Alone Li+ 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 |
| DS2776G+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:2S FG PROT SHA-1 1W 14L 3X5 TDFN T& - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC FUEL GAUGE LI+ 2CELL 14-TDFN |
| DS2776G+T&R | 功能描述:电池管理 2-Cell Stand-Alone Li+ 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 |
| DS2776K | 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 |
| DS2777 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication |
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