Datenblatt-Suchmaschine für elektronische Bauteile
  German  ▼
ALLDATASHEETDE.COM

X  

Preview PDF HTML

ADT7467ARQZ-R7 Datenblatt(PDF) 55 Page - ON Semiconductor

Teilenummer ADT7467ARQZ-R7
Bauteilbeschribung  dBCool Remote Thermal Monitor and Fan Controller
PDF  77 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Hersteller  ONSEMI [ON Semiconductor]
Direct Link  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

ADT7467ARQZ-R7 Datenblatt(HTML) 55 Page - ON Semiconductor

Back Button ADT7467ARQZ-R7 Datasheet HTML 51Page - ON Semiconductor ADT7467ARQZ-R7 Datasheet HTML 52Page - ON Semiconductor ADT7467ARQZ-R7 Datasheet HTML 53Page - ON Semiconductor ADT7467ARQZ-R7 Datasheet HTML 54Page - ON Semiconductor ADT7467ARQZ-R7 Datasheet HTML 55Page - ON Semiconductor ADT7467ARQZ-R7 Datasheet HTML 56Page - ON Semiconductor ADT7467ARQZ-R7 Datasheet HTML 57Page - ON Semiconductor ADT7467ARQZ-R7 Datasheet HTML 58Page - ON Semiconductor ADT7467ARQZ-R7 Datasheet HTML 59Page - ON Semiconductor Next Button
Zoom Inzoom in Zoom Outzoom out
 55 / 77 page
background image
ADT7467
Rev. 3 | Page 55 of 77 | www.onsemi.com
putting the ADT7467 into manual mode and changing the
PWM output from 0% to 100% PWM duty cycle. The PWM
output takes 35 sec to reach 100% when a ramp rate of 1 time
slot is selected.
Figure 76 shows remote temperature plotted against PWM duty
cycle for enhanced acoustics mode. The ramp rate is set to 48,
which corresponds to the fastest ramp rate. Assume that a new
temperature reading is available every 115 ms. With these
settings, it takes approximately 0.76 sec to go from 33% duty
cycle to 100% duty cycle (full speed). Even though the
temperature increases very rapidly, the fan ramps up to full
speed gradually.
140
00.76
120
100
80
60
40
20
0
120
100
80
60
40
20
0
RTEMP (°C)
PWM DUTY CYCLE (%)
TIME (s)
Figure 76. Enhanced Acoustics Mode with Ramp Rate = 48
Figure 77 shows how a ramp rate of 8 affects the control loop.
The overall response of the fan is slower than it is with a ramp
rate of 48. Because the ramp rate is reduced, it takes longer for
the fan to achieve full running speed. In this case, it takes
approximately 4.4 sec for the fan to reach full speed.
TIME (s)
120
0
4.4
140
120
100
80
60
40
0
20
100
80
60
40
20
0
RTEMP (°C)
PWM DUTY CYCLE (%)
Figure 77. Enhanced Acoustics Mode with Ramp Rate = 8
Figure 78 shows the PWM output response for a ramp rate of 2.
With these conditions, the fan takes about 17.6 sec to reach full
running speed.
TIME (s)
140
0
17.6
120
100
80
60
40
20
0
120
100
80
60
40
20
0
RTEMP (°C)
PWM DUTY CYCLE (%)
Figure 78. Enhanced Acoustics Mode with Ramp Rate = 2
Figure 79 shows how the control loop reacts to temperature
with the slowest ramp rate. The ramp rate is set to 1; all other
control parameters are the same as they are for Figure 76
through Figure 78. With the slowest ramp rate selected, it takes
35 sec for the fan to reach full speed.
TIME (s)
0
35
120
100
80
60
40
20
0
140
120
100
80
60
40
20
0
PWM DUTY CYCLE (%)
RTEMP (°C)
Figure 79. Enhanced Acoustics Mode with Ramp Rate = 1
As Figure 76 to Figure 79 show, the rate at which the fan reacts
to a temperature change is dependent on the ramp rate selected
in the enhanced acoustics registers. The higher the ramp rate,
the faster the fan reaches the newly calculated fan speed.



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 76 77


Datenblatt Download

Go To PDF Page


Link URL



War ALLDATASHEET hilfreich?  [ DONATE ] 

Über Alldatasheet   |   Werbung   |   Kontakt   |   Privatsphäre und Datenschutz   |   Link zum Datenblatt    |   Linktausch   |   Hersteller
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