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TC647 View Datasheet(PDF) - Microchip Technology

Part Name
Description
MFG CO.
'TC647' PDF : 28 Pages View PDF
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TC647
Power-Up
Normal
Operaton
Power-on
Reset
FAULT = 1
Yes
VMIN < VSHDN
No
Fire Start-up
Timer
(1 SEC)
Shutdown
VOUT = 0
No
VMIN > VREL?
Yes
Fan Fault
Detected?
Yes
Fire Start-up
TimYeErS
(1 SEC)
Clear
Missing Pulse
Detector
VMIN < VSHDN?
No
Yes
Shutdown
VOUT = 0
No
VMIN > VREL
Yes
Power-up
No
Normal
Operation
Yes Fan Pulse
Detected?
No
Fan Fault
Fan Fault
FAULT = 0,
VOUT = 0
VMIN < VSHDN?
No
Yes
VMIN > VREL? No
Yes
Power-up
No
Cycling
Power?
Yes
VOUT
Proportional to Greater
of VIN or VMIN
Yes
No
Fan Pulse
Detected?
M.P.D.
Expired?
No
Yes
Fire Diagnostic
Timer
(100msec)
Yes
No
Fan Pulse
Detected?
Fire Start-up
Timer
(1 SEC)
Yes Fan Pulse
Detected?
No
Fan Fault
FIGURE 4-1:
TC647 Behavioral Algorithm Flowchart.
DS21447D-page 8
2001-2012 Microchip Technology Inc.
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