Datasheet

LM96163
www.ti.com SNAS433D –JUNE 2008–REVISED MAY 2013
APPLICATION NOTES
FAN CONTROL DUTY CYCLE VS. REGISTER SETTINGS AND FREQUENCY
NOTE
The following table is true only when the 22.5 kHz PWM frequency high resolution duty
cycle is not selected.
PWM PWM Actual Duty
PWM PWM PWM PWM
Step Freq at Freq at Cycle, %
Freq Value Value Value
Resolution, 360 kHz 1.4 kHz When
4D 4C [5:0] 4C [5:0] for 4C [5:0]
% Internal Internal 75% is
[4:0] for 100% about 75% for 50%
Clock, kHz Clock, Hz Selected
0 Address 0 is mapped to Address 1
1 50 2 1 1 180.0 703.1 50.0
2 25 4 3 2 90.00 351.6 75.0
3 16.7 6 5 3 60.00 234.4 83.3
4 12.5 8 6 4 45.00 175.8 75.0
5 10.0 10 8 5 36.00 140.6 80.0
6 8.33 12 9 6 30.00 117.2 75.0
7 7.14 14 11 7 25.71 100.4 78.6
8 6.25 16 12 8 22.50 87.9 75.0
9 5.56 18 14 9 20.00 78.1 77.8
10 5.00 20 15 10 18.00 70.3 75.0
11 4.54 22 17 11 16.36 63.9 77.27
12 4.16 24 18 12 15.00 58.6 75.00
13 3.85 26 20 13 13.85 54.1 76.92
14 3.57 28 21 14 12.86 50.2 75.00
15 3.33 30 23 15 12.00 46.9 76.67
16 3.13 32 24 16 11.25 43.9 75.00
17 2.94 34 26 17 10.59 41.4 76.47
18 2.78 36 27 18 10.00 39.1 75.00
19 2.63 38 29 19 9.47 37.0 76.32
20 2.50 40 30 20 9.00 35.2 75.00
21 2.38 42 32 21 8.57 33.5 76.19
22 2.27 44 33 22 8.18 32.0 75.00
23 2.17 46 35 23 7.82 30.6 76.09
24 2.08 48 36 24 7.50 29.3 75.00
25 2.00 50 38 25 7.20 28.1 76.00
26 1.92 52 39 26 6.92 27.0 75.00
27 1.85 54 41 27 6.67 26.0 75.93
28 1.79 56 42 28 6.42 25.1 75.00
29 1.72 58 44 29 6.21 24.2 75.86
30 1.67 60 45 30 6.00 23.4 75.00
31 1.61 62 47 31 5.81 22.7 75.81
Copyright © 2008–2013, Texas Instruments Incorporated Submit Documentation Feedback 35
Product Folder Links: LM96163