emc2101 Standard Microsystems Corp., emc2101 Datasheet - Page 49

• Manufacturer Part Number: emc2101
• Description: Emc2101 Fan Control With 1?c Accurate Temperature Monitoring
• Manufacturer: Standard Microsystems Corp.

SETTING
PWM_F
[4:0]
0Ch
0Dh
00h
01h
02h
03h
04h
05h
06h
07h
08h
09h
0Ah
0Bh
0Eh
0Fh
10h
12h
13h
11h
RESOLUTION
EFFECTIVE
25.00%
16.67%
12.50%
10.00%
8.33%
7.14%
6.25%
5.56%
5.00%
4.54%
4.17%
3.84%
3.57%
3.33%
50.00
3.13
2.94
2.78
2.63
(%)
FAN_SETTING)
DUTY CYCLE
Table 6.34 Fan Effective Duty Cycle Resolution and Frequency
EFFECTIVE
(AT 75%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
FAN_SETTING)
DUTY CYCLE
EFFECTIVE
(AT 50%
Setting 00h is mapped to setting 01h
94.1%
88.9%
84.2%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
100%
FAN_SETTING
DUTY CYCLE
TO GET 75%
0Ah (71.4%)
1Bh (75.0%)
1Ch (73.7%)
04h (66.7%)
11h (77.3%)
14h (76.9%)
16h (73.3%)
18h (75.0%)
19h (73.5%)
0Ch (75%)
0Dh (72.5)
0Fh (75%)
01h (50%)
03h (75%)
06h (75%)
07h (70%)
09h (75%)
12h (75%)
15h (75%)
FREQUENCY (KHZ)
PWM FREQUENCY
AT 360KHZ BASE
180.0
10.68
10.00
11.25
30.0
20.0
90.0
60.0
45.0
36.0
25.7
22.5
18.0
16.4
15.0
13.8
12.8
12.0
9.47
PWM FREQUENCY
FREQUENCY (HZ)
AT 1.4KHZ BASE
704.2
350.0
233.3
175.0
140.0
116.7
100.0
87.5
77.8
70.0
63.7
58.3
53.8
50.0
46.7
44.0
41.4
39.1
37.1