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TC646EPA Datenblatt(PDF) 9 Page - Microchip Technology

Teilenummer TC646EPA
Bauteilbeschribung  PWM Fan Speed Controller with Auto-Shutdown and FanSense??Technology
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Hersteller  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

TC646EPA Datenblatt(HTML) 9 Page - Microchip Technology

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 2002 Microchip Technology Inc.
DS21446C-page 9
TC646
FIGURE 4-1:
TC646 Behavioral Algorithm Flowchart.
Auto-Shutdown
FAULT = 1
VOUT = 0
Cycling
Power
Yes
Yes
No
No
No
No
Yes
Power-Up
VIN > VREL ?
Fan Pulse
Detected?
VIN < VSHDN?
VIN < VAS?
Shutdown
VOUT = 0
Auto-
Shutdown
VOUT = 0
Yes
No
No
No
Yes
Yes
Power-Up
Normal
Operation
YES
Power-on
Reset
FAULT = 1
VIN > VREL?
No
VIN >
(VAS + VHAS)
Yes
Yes
No
Hot Start
Fire Start-up
Timer
(1 SEC)
Fan Pulse
Detected?
No
Yes
Fan Fault
Fire Start-up
Timer
(1 SEC)
VIN > VREL
Yes
FAULT = 0,
VOUT = 0
VIN < VSHDN ?
Yes
Fan Fault
Clear Missing
Pulse Detector
VOUT
Proportional
to VIN
VIN < VSHDN?
VIN < VAS?
VIN > VOTF?
M.P.D.
Expired?
Fan Pulse
Detected?
Shutdown
VOUT = 0
Auto
Shutdown
VOUT = 0
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Normal
Operation
Power-Up
VIN >
(VAS + VHAS)
No
Yes
Hot Start
Yes
No
FAULT = 0
Yes
Fire
Diagnostic
Timer
(100msec)
Fan Pulse
Detected?
Fire Start-up
Timer
(1 sec)
Fan Fault
Fan Pulse
Detected?
Yes
No
VIN > (VAS + VHAS)?


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