TC648B Microchip Technology Inc., TC648B Datasheet - Page 6

• Manufacturer Part Number: TC648B
• Description: Pwm Fan Speed Controllers With Auto-shutdown, Fan Restart And Fansense Technology For Fault Detection
• Manufacturer: Microchip Technology Inc.

TC646B/TC648B/TC649B
FIGURE 1-4:
DS21755B-page 6
.01 µF
C
7
+
-
+
-
V
V
AS
R
IN
R
K
2
1
1
1 µF
C
TC646B/TC648B/TC649B Electrical Characteristics Test Circuit.
6
K
0.1 µF
0.1 µF
C
C
2
4
3
Note: C
0.1 µF
2
3
1
C
5
V
V
C
AS
IN
F
5
and C
7
are adjusted to get the necessary 1 µF value.
TC646B
TC648B
TC649B
GND
V
DD
4
8
FAULT / OTF
C
1 µF
SENSE
2
V
OUT
C
0.1 µF
1
7
6
5
R
3
+
-
K
K
3
4
V
TC646B and TC649B
DD
R
4
+
-
2003 Microchip Technology Inc.
R
Current
limited
voltage
source
6
(pulse voltage source)
V
SENSE
+
-
R
5
Current
limited
voltage
source
0.1 µF
C
8
V
DD