TC642VPA Microchip Technology, TC642VPA Datasheet - Page 13
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TC642VPA
Manufacturer Part Number
TC642VPA
Description
IC PWM FAN SPEED CONTRLR 8 DIP
Manufacturer
Microchip Technology
Type
Controller - PWM Fanr
Datasheet
1.TC642EUA.pdf
(28 pages)
Specifications of TC642VPA
Applications
Fan Controller, Brushless (BLDC)
Number Of Outputs
1
Voltage - Supply
3 V ~ 5.5 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Through Hole
Package / Case
8-DIP (0.300", 7.62mm)
Motor Type
DC Brushless
No. Of Outputs
1
Output Current
5mA
Supply Voltage Range
3V To 5.5V
Driver Case Style
DIP
No. Of Pins
8
Operating Temperature Range
0°C To +85°C
Product
Fan / Motor Controllers / Drivers
Operating Supply Voltage
6 V
Supply Current
1 mA
Mounting Style
Through Hole
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Output
-
Voltage - Load
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
158-1032
158-1032
158-1032
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
TC642VPA
Manufacturer:
MICROCHIP
Quantity:
12 000
Some applications require the fan to be powered from
the negative 12V supply to keep motor noise out of the
positive voltage power supplies. As is shown in
Figure 5-8, zener diode D
ply voltage, holding transistor Q
FIGURE 5-7:
FIGURE 5-8:
V
2002 Microchip Technology Inc.
OUT
a) Single Bipolar Transistor
R
BASE
Output Drive Transistor Circuit Topologies.
Powering the Fan From a -12V Supply.
V DD
1
GND
Fan
offsets the -12V power sup-
*Note: Value depends on the specific application and is shown for example only.
Q
R
1
SENSE
1
off when V
TC642
+5V
GND
V
V
DD
OUT
OUT
V
OUT
is low.
R
BASE
b) Darlington Transistor Pair
12.0V
Zener
D
1
R
2.2 k
2
*
When V
increases by V
otherwise consistent with the case of fan operation
from +12V.
Q
V
1
GND
R
10 k
Fan
DD
4
*
R
OUT
Q
SENSE
2
-12V
Fan
Q
is high, the voltage at the anode of D
R
2.2
1
OUT
*
3
*
, causing Q
V
OUT
1
c) N-Channel MOSFET
to turn on. Operation is
DS21444C-page 13
TC642
V
GND
Fan
DD
R
Q
SENSE
1
1