TC642VPA Microchip Technology, TC642VPA Datasheet - Page 16
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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
TC642
5.8
In a system containing a microcontroller or other host
intelligence, the TC642 can be effectively managed as
a CPU peripheral. Routine fan control functions can be
performed by the TC642 without processor intervention.
The microcontroller receives temperature data from one
or more points throughout the system. It calculates a fan
operating speed based on an algorithm specifically
designed for the application at hand. The processor
controls fan speed using complementary port bits I/O1
through I/O3. Resistors R
form a crude 3-bit DAC that translates the 3-bit code
FIGURE 5-10:
DS21444C-page 16
Data from one or
Analog or Digital
more Sensors
Temperature
TC642 as a Microcontroller
Peripheral
+5V
GND
Microcontroller
TC642 as a Microcontroller Peripheral.
Open-drain
Outputs
Outputs
CMOS
CMOS
1
through R
I/O2
I/O3
I/O0
I/O1
INT
(MSB)
(RESET)
(LSB)
6
(5% tolerance)
+5V
110 k
240 k
360 k
1.5 k
(Optional)
R
R
R
1
2
3
1 k
R
5
R
6
18 k
R
4
+5V
.01 F
18 k
33 k
C
from the processor's outputs into a 1.6V DC control sig-
nal. A monolithic DAC or digital pot may be used
instead of the circuit shown in Figure 5-10.
With V
operating speed of approximately 40% of full rated
speed when the processor's output code is 000[B].
Output codes 001[B] to 111[B] operate the fan from
roughly 40% to 100% of full speed. An open-drain
output from the processor (I/O0) can be used to reset
the TC642 following detection of a fault condition. The
FAULT output can be connected to the processor's
interrupt input, or to an I/O pin, for polled operation.
B
R
R
8
7
MIN
.01 F
+
1 F
C
B
4
2
3
1
set to 1.8V, the TC642 has a minimum
V
GND
V
C
IN
MIN
F
TC642
SENSE
FAULT
V
V
OUT
2002 Microchip Technology Inc.
DD
8
1 F
6
5
7
+5V
C
B
0.1 F
+5V
10 k
+
R
800
10
R
9
+12V
Fan
2N2222A
2.2
R
11