FAN8902 Fairchild Semiconductor, FAN8902 Datasheet - Page 7

• Manufacturer Part Number: FAN8902
• Description: Motor / Motion / Ignition Controllers & Drivers Fan Motor Controller DC
• Manufacturer: Fairchild Semiconductor
• Type: Fan Motor Controllerr

Specifications of FAN8902

• Operating Current: 8mA
• Operating Temperature Classification: Industrial
• Package Type: PDIP
• Operating Supply Voltage (typ): 12V
• Product: Fan / Motor Controllers / Drivers
• Operating Supply Voltage: 32 V
• Supply Current: 8 mA
• Mounting Style: Through Hole
• Package / Case: DIP-14
• Operating Temperature: - 40 C to + 90 C
• Lead Free Status / RoHS Status: Compliant

FAN8902(KA3902)
4. Oscillator Component Selection
The oscillator timing components can be calculated as follows:
For example, if fosc = 25kHz and duty = 95%
5. Current Command Input Section
The current command I* selects the lower value between V
7
Duty
fosc
C
R
T
T
C
D
T
T
=
=
=
=
=
=
=
=
=
=
I
D
1000 pF
1.875
1.875
75 k
R
C
1
1.875
T
T
C
T
T
D
T
C
C
fosc 100
I
C
D
T
R
V
+
T
fosc
25kHz
R
T
H
T
Vref
T
In Vref V
D
–
V/C
V
V
V
H
C
L
T
L
–
C
T
V
V
T
I
1000pF
H
D
L
–
CMD
+
La
L
14
1
Vref V
V
V
CMD
FAN8902
La
–
Logic
H
+
+
I*
CMD
V
4R
V
V
L
CT
H
=1.75
=3.0
and V
R
[V]
La
.
+
T=40.0
Td=1.0
Logic
T
C
=39.0
t [ s]