TC646BEOA Microchip Technology, TC646BEOA Datasheet - Page 16

• Manufacturer Part Number: TC646BEOA
• Description: IC PWM FAN SPEED CTRLR SD 8-SOIC
• Manufacturer: Microchip Technology
• Type: Controller - PWM Fanr

Specifications of TC646BEOA

• Applications: Fan Controller, Brushless (BLDC)
• Number Of Outputs: 1
• Voltage - Supply: 3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 8-SOIC (3.9mm Width)
• Motor Type: PWM
• No. Of Outputs: 1
• Output Current: 5mA
• Output Voltage: 4.4V
• Supply Voltage Range: 3V To 5.5V
• Driver Case Style: SOIC
• No. Of Pins: 8
• Operating Temperature Range: -40°C To +85°C
• Product: Fan / Motor Controllers / Drivers
• Operating Supply Voltage: 6 V
• Supply Current: 400 uA
• Mounting Style: SMD/SMT
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Current - Output: -
• Voltage - Load: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

TC646B/TC648B/TC649B
FIGURE 4-9:
DS21755B-page 16
Hot Start
V
Fire Start-up
V
FAULT = 1
IN
Power-Up
Power-on
Fan Pulse
Detected?
Operation
IN
Yes
Normal
(1 sec)
Reset
No
Timer
< V
No
No
< V
SHDN
AS
FAULT = Low,
V
V
?
Detected?
IN
Fan Fault
OUT
16 Pulses
Operation
?
Yes
Normal
< V
TC646B/TC649B Behavioral Algorithm.
= High
No
Yes
Yes
SHDN
No
Yes
?
Shutdown
Shutdown
V
Fire Start-up
V
Detected?
Fan Pulse
OUT
Fan Fault
Auto-
OUT
(1 sec)
No
Timer
Yes
= 0
= 0
No
(V
AS
V
+ V
IN
V
Shutdown
V
Yes
V
IN
>
HAS
IN
OUT
Yes
> V
> V
)
REL
= 0
REL
No
?
?
No
Yes
Power-Up
Yes
Pulse Detector
Clear Missing
V
V
Proportional
IN
V
Fan Pulse
Operation
Detected?
IN
IN
No
Normal
No
No
< V
to V
V
> V
< V
No
OUT
SHDN
IN
OTF
AS
?
?
?
Expired?
FAULT = 0
M.P.D.
Yes
No
Yes
Yes
Diagnostic
(100 msec)
Fan Pulse
Detected?
Shutdown
V
Timer
OUT
Fire
Auto
Yes
Yes
= 0
(V
2003 Microchip Technology Inc.
AS
TC646B Only
Shutdown
V
Yes
V
+ V
IN
OUT
No
Yes
>
HAS
= 0
Fire Start-up
Detected?
Fan Pulse
)
Fan Fault
No
(1 sec)
Timer
Hot Start
V
No
IN
> V
Power-Up
Yes
REL?
No