TC646BEOA Microchip Technology, TC646BEOA Datasheet - Page 17

• 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

FIGURE 4-10:
2003 Microchip Technology Inc.
Power-Up
V
Power-Up
V
Power-on
OTF = 1
IN
No
No
AS
Reset
< V
V
= 0V
V
IN
OUT
AS
> 1.20V
TC648B Behavioral Algorithm.
?
= 0
Yes
OTF = 0
Yes
Yes
No
Yes
Speed Mode
Shutdown
V
Minimum
OUT
Auto-
Yes
= 0
Speed Mode
V
(V
Fire Start-up
Proportional
V
Operation
IN
No
Minimum
IN
V
AS
OTF = 1
Normal
(1 sec)
to V
Timer
IN
V
V
> 1.20V
> V
+ V
IN
OUT
= 0V
Yes
IN
>
OTF
HAS
Yes
No
?
)
No
TC646B/TC648B/TC649B
No
V
OUT
= 0
Shutdown
V
OUT
Auto
OTF = 0
= 0
Yes
Yes
Proportional
V
V
Operation
IN
OTF = 1
No
IN
Normal
to V
V
> V
< V
OUT
IN
No
OTF
AS
DS21755B-page 17
?
?