Motor de Búsqueda de Datasheet de Componentes Electrónicos
  Spanish  ▼
ALLDATASHEET.ES

X  

TC649 Datasheet(PDF) 7 Page - Microchip Technology

No. de pieza TC649
Descripción Electrónicos  PWM Fan Speed Controller with Auto-Shutdown and FanSense??Technology
Download  28 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Fabricante Electrónico  MICROCHIP [Microchip Technology]
Página de inicio  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC649 Datasheet(HTML) 7 Page - Microchip Technology

Back Button TC649_13 Datasheet HTML 3Page - Microchip Technology TC649_13 Datasheet HTML 4Page - Microchip Technology TC649_13 Datasheet HTML 5Page - Microchip Technology TC649_13 Datasheet HTML 6Page - Microchip Technology TC649_13 Datasheet HTML 7Page - Microchip Technology TC649_13 Datasheet HTML 8Page - Microchip Technology TC649_13 Datasheet HTML 9Page - Microchip Technology TC649_13 Datasheet HTML 10Page - Microchip Technology TC649_13 Datasheet HTML 11Page - Microchip Technology Next Button
Zoom Inzoom in Zoom Outzoom out
 7 / 28 page
background image
 2001-2012 Microchip Technology Inc.
DS21449D-page 7
TC649
4.0
SYSTEM BEHAVIOR
The flowcharts describing the TC649’s behavioral
algorithm are shown in Figure 4-1. They can be
summarized as follows:
4.1
Power-Up
(1) Assuming the device is not being held in shutdown
or auto-shutdown mode (VIN > VAS)...
(2) Turn VOUT output on for 32 cycles of the PWM
clock. This ensures that the fan will start from a
dead stop.
(3) During this Start-up Timer, if a fan pulse is
detected, branch to Normal Operation; if none are
received…
(4) Activate the 32-cycle Start-up Timer one more time
and look for fan pulse; if a fan pulse is detected,
proceed to Normal Operation; if none are
received…
(5) Proceed to Fan Fault.
(6) End.
4.2
Normal Operation
Normal Operation is an endless loop which may only
be exited by entering shutdown mode, auto-shutdown
mode or Fan Fault. The loop can be thought of as exe-
cuting at the frequency of the oscillator and PWM.
(1) Reset the missing pulse detector.
(2) Is TC649 in shutdown or auto-shutdown mode? If
so…
a. VOUT duty cycle goes to zero.
b. FAULT is disabled.
c. Exit the loop and wait for VIN > (VAS + VHAS) to
resume operation.
(3) Drive VOUT to a duty cycle proportional to VIN on a
cycle by cycle basis.
(4) If a fan pulse is detected, branch back to the start
of the loop (1).
(5) If the missing pulse detector times out …
(6) Activate the 3-cycle Diagnostic Timer and look for
pulses; if a fan pulse is detected, branch back to
the start of the loop (1); if none are received…
(7) Activate the 32-cycle Start-up Timer and look for
pulses; if a fan pulse is detected, branch back to
the start of the loop (1); if none are received…
(8) Quit Normal Operation and go to Fan Fault.
(9) End.
4.3
Fan Fault
Fan Fault is an infinite loop wherein the TC649 is
latched in shutdown mode. This mode can only be
released by a reset (i.e., VIN being brought below
VSHDN, then above (VAS + VHAS) or by power-cycling).
(1) While in this state, FAULT is latched on (low) and
the VOUT output is disabled.
(2) A reset sequence applied to the VIN pin will exit the
loop to Power-up.
(3) End.


Número de pieza similar - TC649_13

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Microchip Technology
TC649B MICROCHIP-TC649B Datasheet
683Kb / 36P
   PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense??Technology for Fault Detection
2003
TC649B MICROCHIP-TC649B Datasheet
580Kb / 36P
   PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense??Technology for Fault Detection
11/29/12
TC649B MICROCHIP-TC649B Datasheet
2Mb / 44P
   Analog & Interface Product Selector Guide
11/29/11
TC649B MICROCHIP-TC649B Datasheet
2Mb / 44P
   Analog and Interface Product Selector Guide
11/29/11
TC649B MICROCHIP-TC649B Datasheet
728Kb / 36P
   PWM Fan Speed Controllers With Auto-Shutdown
03/25/03
More results

Descripción similar - TC649_13

Fabricante ElectrónicoNo. de piezaDatasheetDescripción Electrónicos
logo
Microchip Technology
TC646 MICROCHIP-TC646 Datasheet
473Kb / 28P
   PWM Fan Speed Controller with Auto-Shutdown and FanSense??Technology
2002
TC649 MICROCHIP-TC649 Datasheet
478Kb / 28P
   PWM Fan Speed Controller with Auto-Shutdown and FanSense??Technology
2002
DTC646 MICROCHIP-DTC646 Datasheet
386Kb / 30P
   PWM Fan Speed Controller with Auto-Shutdown and FanSense??Technology
11/29/12
TC642 MICROCHIP-TC642_13 Datasheet
400Kb / 28P
   PWM Fan Speed Controller with FanSense??Technology
11/29/12
TC642 MICROCHIP-TC642 Datasheet
485Kb / 28P
   PWM Fan Speed Controller with FanSense??Technology
2002
TC647 MICROCHIP-TC647_13 Datasheet
386Kb / 28P
   PWM Fan Speed Controller with FanSense??Technology
11/29/12
TC647 MICROCHIP-TC647 Datasheet
478Kb / 28P
   PWM Fan Speed Controller with FanSense Technology
2002
TC642COA713 MICROCHIP-TC642COA713 Datasheet
503Kb / 28P
   PWM Fan Speed Controller with FanSense??Technology
08/01/02
TC646B MICROCHIP-TC646B Datasheet
683Kb / 36P
   PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense??Technology for Fault Detection
2003
TC646B MICROCHIP-TC646B_13 Datasheet
580Kb / 36P
   PWM Fan Speed Controllers With Auto-Shutdown, Fan Restart and FanSense??Technology for Fault Detection
11/29/12
More results


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


Datasheet Descarga

Go To PDF Page


Enlace URL




Política de Privacidad
ALLDATASHEET.ES
¿ALLDATASHEET es útil para Ud.?  [ DONATE ] 

Todo acerca de Alldatasheet   |   Publicidad   |   Contáctenos   |   Política de Privacidad   |   Intercambio de Enlaces   |   Lista de Fabricantes
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