TC648EUA Microchip Technology, TC648EUA Datasheet - Page 8

• Manufacturer Part Number: TC648EUA
• Description: IC PWM FAN SPEED CTRLR 8-MSOP
• Manufacturer: Microchip Technology
• Type: Controller - PWM Fanr

Specifications of TC648EUA

• 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-MSOP, Micro8™, 8-uMAX, 8-uSOP,
• Motor Type: DC Brushless
• No. Of Outputs: 1
• Output Current: 5mA
• Output Voltage: 4.4V
• Supply Voltage Range: 3V To 5.5V
• Driver Case Style: MSOP
• No. Of Pins: 8
• Product: Fan / Motor Controllers / Drivers
• Operating Supply Voltage: 3 V to 5.5 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

TC648
FIGURE 4-1:
DS21448C-page 8
Power-Up
V
V
IN
OUT
> 1.25V
V
Power-Up
Power-on
V
No
OTF = 1
IN
No
AS
Yes
Reset
= 0
< V
OTF = 0
0V
AS
TC648 Behavioral Algorithm Flowcharts.
Yes
?
No
Yes
Yes
Yes
V
V
Speed Mode
V
V
OUT
IN
Shutdown
V
Minimum
IN
IN
OTF = 1
OUT
> 1.25V ?
Auto-
> V
Duty Cycle Proportional to V
0V ?
Speed Mode
Yes
No
No
OTF
= 0
Minimum
(V
Fire Start-up
Operation
AS
?
Normal
Timer
V
+ V
IN
>
HAS
YES
No
)
No
V
OUT
IN
= 0
Shutdown
V
OTF = 0
OUT
Auto-
2002 Microchip Technology Inc.
= 0
Yes
Yes
V
Cycle Prop.
V
Operation
V
No
No
OUT
OTF = 1
IN
Normal
IN
to V
> V
< V
IN
Duty
OTF
AS
?
?