Moteur de recherche de fiches techniques de composants électroniques
Selected language     French  ▼
Nom de la pièce
         Description


TC651 Datasheet(Fiches technique) 8 Page - Microchip Technology

Numéro de pièce TC651
Description  Tiny Integrated Temperature Sensor & Brushless DC Fan Controller with Overtemperature Alert
Télécharger  18 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Fabricant  MICROCHIP [Microchip Technology]
Site Internet  http://www.microchip.com
Logo 

 8 page
background image
TC650/TC651
DS21450D-page 8
 2001-2012 Microchip Technology Inc.
4.6
Temperature Selection Guide
(Minimum Fan Speed/Full Speed)
There are two temperature thresholds that determine
the characteristics of the device. The minimum fan
speed temperature (TL) and the full fan speed temper-
ature (TH). Depending on the TC65X device selected,
when the temperature is below the TL trip point, the
PWM output will perform a different operation. For the
TC650, the PWM will be driven at the minimum PWM
frequency, while the TC651 will shut down the PWM
(PWM = L).
TL and TH can be selected in 5°C increments. TL can
range from 25°C to 35°C. TH can range from 35°C to
55°C and must be 10°C (or more) than the specified TL.
The five temperature regions defined by the six
thresholds are defined in the TC650/TC651 by means of
factory trimming. Once a TL and TH are set, the T1 – T4
thresholds are automatically equally spaced between TL
and TH. Table 4-1 shows these 5 regions and what the
corresponding PWM duty cycle is.
TABLE 4-1:
TEMPERATURE RANGE
DEFINITION
Table 4-2 shows the device codes that specify the TH
and TL temperature thresholds. The following exam-
ples are given to assist in understanding the device-
ordering nomenclature.
Example 1: Suppose you wanted the fan to run at
40% speed at 25°C or less and go to full-
speed at 45°C. You would order the part
number TC650AEVUA.
Example 2: Suppose you wanted the fan to turn on at
30°C and go to full speed at 45°C. You
would order the part number
TC651BEVUA.
TABLE 4-2:
DEVICE CODES FOR
TEMPERATURE
THRESHOLDS
Temperature
(T = TJ)
(Note 1)
PWM Duty Cycle
TC650
(Minimum
Speed mode)
TC651
(Auto-shutdown
mode)
T < TL
40%
Off
TL< = T < T1
50%
50%
T1 < = T < T2
60%
60%
T2 < = T <T3
70%
70%
T3 < = T < T4
80%
80%
T4 < = T < TH
90%
90%
TH < = T < TOV
100%
100%
TOV < = T
100% with Overtemperature Alert
(TOVER = L)
Note 1:
The temperature regions defined by the
six temperature thresholds are pre-
defined in the TC650/TC651 by means of
factory trimming. Once a TL and TH are
programmed, the T1 – T4 thresholds are
automatically equally spaced between TL
and TH.
Temp.
Threshold
Difference
TL
TH
Threshold
Limits Code
10°C
25
35
AC (1)
30
40
BD (2)
35
45
CE (2)
15°C
25
40
AD (2)
30
45
BE (1)
35
50
CF (2)
20°C
25
45
AE (1)
30
50
BF (2)
35
55
CG (1)
30°C
25
55
AG (1)
Note 1:
This temperature threshold option is
available for ordering.
2:
This is a custom temperature threshold
option. Please contact the factory for
more information.




Html Pages

1  2  3  4  5  6  7  8  9  10  11  12  13  14  15  16  17  18 


Datasheet Download




Lien URL

AllDATASHEET vous a-t-il été utile ?   [ DONATE ]  

À propos de Alldatasheet   |   Publicité   |   Contactez-nous   |   Politique de confidentialité   |   Favoris   |   Echange de liens   |   Fabricants
All Rights Reserved © Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , 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