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参数资料
| 型号： | LTC6802IG-1#TRPBF |
| 厂商： | Linear Technology |
| 文件页数： | 11/38页 |
| 文件大小： | 0K |
| 描述： | IC MONITOR BATT STACK MC 44-SSOP |
| 标准包装： | 2,000 |
| 功能： | 电池监控器 |
| 电池化学： | 锂离子（Li-Ion） |
| 电源电压： | 4 V ~ 50 V |
| 工作温度： | -40°C ~ 85°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-FSOP（0.209"，5.30mm 宽） |
| 供应商设备封装： | 44-SSOP |
| 包装： | 带卷 (TR) |
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LTC6802-1
TIMING DIAGRAM
Timing Diagram of the Serial Interface
SCKI
t 1
t 2
t 4
t 3
t 6
t 7
SDI
D3
D2
D1
D0
D7 … D4
D3
t 5
CSBI
t 8
SDO
D4
D3
D2
D1
D0
D7 … D4
D3
PREVIOUS COMMAND
OPERATION
CURRENT COMMAND
68021 TD
THEORY OF OPERATION
The LTC6802-1 is a data acquisition IC capable of mea-
suring the voltage of 12 series connected battery cells.
An input multiplexer connects the batteries to a 12-bit
delta-sigma analog to digital converter (ADC). An internal
10ppm voltage reference combined with the ADC give the
LTC6802-1 its outstanding measurement accuracy. The
inherent benefits of the delta-sigma ADC versus other types
of ADCs (e.g. successive approximation) are explained
in Advantages of Delta-Sigma ADCs in the Applications
Information section.
Communication between the LTC6802-1 and a host pro-
cessor is handled by a SPI compatible serial interface. As
shown in Figure 1, the LTC6802-1’s can pass data up and
down a stack of devices using simple diodes for isolation.
This operation is described in Serial Port in the Applica-
tions Information section.
The LTC6802-1 also contains circuitry to balance cell volt-
ages. Internal MOSFETs can be used to discharge cells.
These internal MOSFETs can also be used to control external
balancing circuits. Figure 1 illustrates cell balancing by
internal discharge. Figure 4 shows the S pin controlling
an external balancing circuit. It is important to note that
the LTC6802-1 makes no decisions about turning on/off
the internal MOSFETs. This is completely controlled by
the host processor. The host processor writes values to
a configuration register inside the LTC6802-1 to control
the switches. The watchdog timer on the LTC6802-1 will
turn off the discharge switches if communication with the
host processor is interrupted.
OPEN CONNECTION DETECTION
When a cell input (C pin) is open, it affects two cell mea-
surements. Figure 2 shows an open connection to C3,
in an application without external filtering between the C
pins and the cells. During normal ADC conversions (that
is, using the STCVAD command), the LTC6802 will give
near zero readings for B3 and B4 when C3 is open. The
zero reading for B3 occurs because during the measure-
ment of B3, the ADC input resistance will pull C3 to the
C2 potential. Similarly, during the measurement of B4, the
ADC input resistance pulls C3 to the C4 potential.
68021fa
11
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相关代理商/技术参数 |
参数描述 |
|---|---|
| LTC6802IG-2 | 制造商:LINER 制造商全称:Linear Technology 功能描述:Multicell Addressable Battery Stack Monitor |
| LTC6802IG-2#3ZZPBF | 制造商:Linear Technology 功能描述: |
| LTC6802IG-2#PBF | 功能描述:IC MONITOR BATT STACK 44-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 其它有关文件:STC3100 View All Specifications 特色产品:STC3100 - Battery Monitor IC 标准包装:4,000 系列:- 功能:燃料，电量检测计/监控器 电池化学:锂离子（Li-Ion） 电源电压:2.7 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:8-TSSOP，8-MSOP（0.118"，3.00mm 宽） 供应商设备封装:8-MiniSO 包装:带卷 (TR) 其它名称:497-10526-2 |
| LTC6802IG-2#PBF | 制造商:Linear Technology 功能描述:IC BATTERY MONITOR LI-ION 50V SSOP44 |
| LTC6802IG-2#TRPBF | 功能描述:IC MONITOR BATT STACK 44-SSOP RoHS:是 类别:集成电路 (IC) >> PMIC - 电池管理 系列:- 产品培训模块:Lead (SnPb) Finish for COTS Obsolescence Mitigation Program 标准包装:2,500 系列:- 功能:电池监控器 电池化学:碱性，锂离子，镍镉，镍金属氢化物 电源电压:1 V ~ 5.5 V 工作温度:-40°C ~ 85°C 安装类型:表面贴装 封装/外壳:SOT-23-6 供应商设备封装:SOT-6 包装:带卷 (TR) |
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