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EMC2103-4-AP 参数 Datasheet PDF下载

EMC2103-4-AP图片预览
型号: EMC2103-4-AP
PDF下载: 下载PDF文件 查看货源
内容描述: 基于RPM的风扇控制器硬件过热关机 [RPM-Based Fan Controller with HW Thermal Shutdown]
分类和应用: 模拟IC风扇信号电路控制器
文件页数/大小: 84 页 / 1193 K
品牌: SMSC [ SMSC CORPORATION ]
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RPM-Based Fan Controller with HW Thermal Shutdown  
Datasheet  
term that is applied to the Actual RPM to achieve the Reported RPM. It should only be applied if the  
number of edges measured does not match the number of edges expected based on the number of  
poles of the fan (which is fixed for any given fan).  
Contact SMSC for recommended settings when using fans with more or less than 2 poles.  
Table 6.31 Minimum Edges for Fan Rotation  
EDGES[1:0]  
EFFECTIVE TACH  
MULTIPLIER (BASED ON 2  
POLE FANS)  
MINIMUM TACH  
EDGES  
1
0
NUMBER OF FAN POLES  
0
0
1
1
0
1
0
1
3
5
7
9
1 pole  
0.5  
1
2 poles (default)  
3 poles  
1.5  
2
4 poles  
Bit 2-0 - UPDATE - determines the base time between fan driver updates. The Update Time, along  
with the Fan Step Register, is used to control the ramp rate of the drive response to provide a cleaner  
transition of the actual fan operation as the desired fan speed changes. The Update Time is set as  
shown in Table 6.32.  
Table 6.32 Update Time  
UPDATE[2:0]  
2
1
0
UPDATE TIME  
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
100ms  
200ms  
300ms  
400ms (default)  
500ms  
800ms  
1200ms  
1600ms  
6.23  
Fan Configuration 2 Register  
Table 6.33 Fan Configuration 2 Register  
ADDR  
R/W  
REGISTER  
B7  
B6  
B5  
B4  
B3  
B2  
B1  
B0  
DEFAULT  
Fan  
Configuration  
2
EN_  
RRC  
GLITCH  
_EN  
43h  
R/W  
-
DER_OPT [1:0]  
ERR_RNG:0]  
-
38h  
Revision 0.85 (01-29-08)  
SMSC EMC2103  
DATA5S6HEET