Electronic Components Datasheet Search
  British  ▼
ALLDATASHEET.CO.UK

X  

Preview PDF HTML

ADT7490ARQZ-R7 Datasheet(PDF) 38 Page - ON Semiconductor

Part # ADT7490ARQZ-R7
Description  dBCool Remote Thermal Monitor and Fan Controller with PECI Interface
PDF  75 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

ADT7490ARQZ-R7 Datasheet(HTML) 38 Page - ON Semiconductor

Back Button ADT7490ARQZ-R7 Datasheet HTML 34Page - ON Semiconductor ADT7490ARQZ-R7 Datasheet HTML 35Page - ON Semiconductor ADT7490ARQZ-R7 Datasheet HTML 36Page - ON Semiconductor ADT7490ARQZ-R7 Datasheet HTML 37Page - ON Semiconductor ADT7490ARQZ-R7 Datasheet HTML 38Page - ON Semiconductor ADT7490ARQZ-R7 Datasheet HTML 39Page - ON Semiconductor ADT7490ARQZ-R7 Datasheet HTML 40Page - ON Semiconductor ADT7490ARQZ-R7 Datasheet HTML 41Page - ON Semiconductor ADT7490ARQZ-R7 Datasheet HTML 42Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 38 / 75 page
background image
ADT7490
http://onsemi.com
38
Figure 53. TRANGE Parameter Affects Cooling Slope
TEMPERATURE
TMIN
100%
PWMMIN
0%
TRANGE
The TRANGE is determined by the following procedure:
1. Determine the maximum operating temperature for
that channel (for example, 70
°C).
2. Determine experimentally the fan speed (PWM
duty cycle value) that does not exceed the
temperature at the worst−case operating points.
For example, 70
°C is reached when the fans are
running at 50% PWM duty cycle.
3. Determine the slope of the required control loop to
meet these requirements.
4. Using the ADT7490 evaluation software,
graphically program and visualize this
functionality. Ask a local Analog Devices
representative for details.
As PWMMIN is changed, the automatic fan control slope
changes.
Figure 54. Adjusting PWMMIN Changes the Automatic
Fan Control Slope
TMIN
100%
33%
0%
50%
305C
As TRANGE is changed, the slope changes. As TRANGE
gets smaller, the fans reach 100% speed with a smaller
temperature change.
Figure 55. Increasing TRANGE Changes the
AFC Slope
TMIN
TMIN–HYST
100%
0%
305C
405C
10%
455C
545C
Figure 56. Changing PWM Max Does Not Change the
AFC Slope
100%
MAX
PWM
0%
TRANGE
10%
TMIN–HYST
Selecting TRANGE
The TRANGE value can be selected for each temperature
channel: Remote 1, local, Remote 2, and PECI temperature.
Bits [7:4] (TRANGE) of Register 0x5F to Register 0x61 and
Register 0x3C define the TRANGE value for each
temperature channel.
Table 19. Selecting a TRANGE Value
Bits [7:4] (Note 1)
TRANGE (5C)
0000
2
0001
2.5
0010
3.33
0011
4
0100
5
0101
6.67
0110
8
0111
10
1000
13.33
1001
16
1010
20
1011
26.67
1100
32 (default)
1101
40
1110
53.33
1111
80
1. Register 0x5F configures Remote 1 TRANGE; Register 0x60
configures local TRANGE; Register 0x61 configures Remote 2
TRANGE, Register 0x3C configures PECI TRANGE.



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com