TC649BEOA Microchip Technology, TC649BEOA Datasheet - Page 26

• Manufacturer Part Number: TC649BEOA
• Description: IC PWM FAN SPEED CTRLR SD 8-SOIC
• Manufacturer: Microchip Technology
• Type: Controller - PWM Fanr

Specifications of TC649BEOA

• 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: 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

TC646B/TC648B/TC649B
FIGURE 5-13:
Bypass capacitor C
decouple the bias voltage. This is good to have, espe-
cially when using a MOSFET as the drive device. This
helps to give a localized low-impedance source for the
current required to charge the gate capacitance of Q
Two other bypass capacitors (labeled as C
added to decouple the V
added simply to remove any noise present that might
cause false triggerings or PWM jitter. R
resistor for the FAULT output. The value for this resistor
is system-dependent.
DS21755B-page 26
45.3k
237 k
R
R
2
1
+5V
17.8 k
R
4
VDD
+5V
Design Example Schematic.
IN
R
32.4 k
3
is added to the design to
and V
C
0.01 µF
0.01 µF
C
1.0 µF
C
B
Thermometrics
100 k @25°C
NHQ104B425R5
AS
B
F
nodes. These were
3
2
1
V
C
V
5
IN
AS
F
is the pull-up
B
) were also
®
TC649B
V
GND
8
1
DD
.
4
+
1.0 µF
SENSE
C
FAULT
VDD
V
OUT
6
7
5
R
10 k
5
C
0.1 µF
SENSE
R
2003 Microchip Technology Inc.
3.0
SENSE
+12V
Fan
Q
SI2302
or
MGSF1N02E
Panasonic
12V, 140 mA
FBA06T12H
1
®