TC647B Microchip Technology Inc., TC647B Datasheet - Page 16
TC647B
Manufacturer Part Number
TC647B
Description
Pwm Fan Speed Controllers With Minimum Fan Speed, Fan Restart And Fansense Technology For Fault Detection
Manufacturer
Microchip Technology Inc.
Datasheet
1.TC647B.pdf
(34 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC647BEOA
Manufacturer:
SDB
Quantity:
6 218
Company:
Part Number:
TC647BEOATR
Manufacturer:
MICROCHIP
Quantity:
12 000
Company:
Part Number:
TC647BEPA
Manufacturer:
MICROCHIP
Quantity:
12 000
Company:
Part Number:
TC647BEUA
Manufacturer:
Microchip Technology
Quantity:
35
Company:
Part Number:
TC647BEUA
Manufacturer:
MICROCHIP
Quantity:
12 000
TC642B/TC647B
FIGURE 4-9:
DS21756B-page 16
V
Fire Start-up
MIN
FAULT = 1
Fan Pulse
Detected?
Power-Up
Operation
Power-on
Yes
No
Normal
Reset
(1 sec)
No
Timer
< V
SHDN
FAULT = Low,
V
V
Yes
MIN
?
Detected?
16 Pulses
Operation
Fan Fault
OUT
Normal
<V
No
Yes
= High
SHDN
Yes
No
TC642B/TC647B Behavioral Algorithm.
Shutdown
Fire Start-up
V
?
Detected?
Fan Pulse
Fan Fault
OUT
No
(1 sec)
Timer
= 0
Yes
No
V
V
MIN
MIN
Shutdown
Yes
V
OUT
> V
> V
= 0
REL
REL
?
?
No
Yes
Power-Up
Proportional to Greater
Yes
V
Pulse Detector
Clear Missing
of V
MIN
V
Operation
Fan Pulse
Detected?
IN
Normal
No
No
IN
V
No
< V
> V
OUT
or V
SHDN
OTF
MIN
?
Expired?
?
M.P.D.
Yes
No
Yes
FAULT = 0
(100 msec)
Diagnostic
Fan Pulse
Detected?
Yes
Timer
Fire
Yes
Yes
Shutdown
V
2003 Microchip Technology Inc.
TC642B Only
OUT
No
= 0
Fire Start-up
Detected?
Fan Pulse
Fan Fault
(1 sec)
Timer
V
MIN
Power-Up
No
> V
Yes
REL
?
No