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DTC646 Datasheet(PDF) 17 Page - Microchip Technology

Part # DTC646
Description  PWM Fan Speed Controller with Auto-Shutdown and FanSense??Technology
PDF  30 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

DTC646 Datasheet(HTML) 17 Page - Microchip Technology

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 2002-2012 Microchip Technology Inc.
DS21446D-page 17
TC646
FIGURE 5-10:
TC646
as a Microcontroller Peripheral.
FIGURE 5-11:
VRELEASE vs. Temperature.
CMOS
Microcontroller
TC646
VIN
CF
VAS
GND
VDD
VOUT
FAULT
SENSE
+5V
Analog or Digital
Temperature
Data from one or
more Sensors
I/O0
I/O1
I/O2
I/O3
INT
GND
(Optional)
(MSB)
R1
110 k
Ω
R2
240 k
Ω
R3
360 k
Ω
(LSB)
R5
1.5 k
Ω
+5V
R6
1 k
Ω
R4
18 k
Ω
R7
33 k
Ω
+5V
R8
18 k
Ω
CB
.01
μF
+
1
μF
CB
.01
μF
CMOS
Outputs
Open-Drain
Outputs
Fan
+12V
+5V
CB
1
μF
+
R9
800
Ω
+5V
R10
10 k
Ω
0.1
μF
2N2222A
R11
2.2
Ω
1
2
3
4
5
6
7
8
(RESET)
VRELEASE vs. Temperature
0˚C
25˚C
TEMPERATURE
85˚C
VDD = 3.0V
VDD = 4.0V
VDD = 5.0V
VDD = 5.5V
1.0
0.9
0.8
0.7
0.6
0.5
0.4



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