EMC2101-R-ACZL-TR datasheet(48/56 Pages) MICROCHIP

48 / 56 page

TABLE 1:

FAN EFFECTIVE DUTY CYCLE RESOLUTION AND FREQUENCY

PWM_F [4:0]

Setting

Effective

Resolution (%)

Effective Duty Cycle

(at 75% FAN_SETTING)

EFFECTIVE Duty Cycle

(at 50% FAN_SETTING)

FAN_SETTING to Get

75% Duty Cycle

PWM FREQUENCY

at 360 kHz Base

Frequency (kHz)

PWM FREQUENCY

at 1.4 kHz Base

Frequency (Hz)

00h

Setting 00h is mapped to setting 01h

01h

50.00%

100%

01h (50%)

180.0

704.2

02h

25.00%

100%

03h (75%)

90.0

350.0

03h

16.67%

100%

04h (66.7%)

60.0

233.3

04h

12.50%

100%

06h (75%)

45.0

175.0

05h

10.00%

100%

07h (70%)

36.0

140.0

06h

8.33%

100%

09h (75%)

30.0

116.7

07h

7.14%

100%

0Ah (71.4%)

25.7

100.0

08h

6.25%

100%

0Ch (75%)

22.5

87.5

09h

5.56%

100%

0Dh (72.5)

20.0

77.8

0Ah

5.00%

100%

0Fh (75%)

18.0

70.0

0Bh

4.54%

100%

11h (77.3%)

16.4

63.7

0Ch

4.17%

100%

12h (75%)

15.0

58.3

0Dh

3.84%

100%

14h (76.9%)

13.8

53.8

0Eh

3.57%

100%

15h (75%)

12.8

50.0

0Fh

3.33%

100%

16h (73.3%)

12.0

46.7

10h

3.13%

100%

18h (75.0%)

11.25

44.0

11h

2.94%

100%

94.1%

19h (73.5%)

10.68

41.4

12h

2.78%

100%

88.9%

1Bh (75.0%)

10.00

39.1

13h

2.63%

100%

84.2%

1Ch (73.7%)

9.47

37.1

14h

2.50%

100%

80.0%

1Eh (75.0%)

9.00

35.2

15h

2.38%

100%

76.2%

1Fh (73.8%)

8.57

33.5

16h

2.27%

100%

72.7%

21h (75.0%)

8.18

32.0

17h

2.17%

100%

69.7%

22h (73.9%)

7.83

30.6

18h

2.08%

100%

66.7%

24h (75.0%)

7.50

29.3

19h

2.00%

96%

64.0%

25h (74.0%)

7.20

28.2

1Ah

1.92%

92.3%

61.5%

27h (75.0%)

6.92

27.1

1Bh

1.85%

88.9%

59.3%

28h (74.1%)

6.67

26.1

1Ch

1.79%

85.7%

57.1%

2Ah (75.0%)

6.43

25.1

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