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MC33065DW View Datasheet(PDF) - Motorola => Freescale

Part NameDescriptionManufacturer
MC33065DW High performance dual channel current mode controller Motorola
Motorola => Freescale Motorola
MC33065DW Datasheet PDF : 15 Pages
1 2 3 4 5 6 7 8 9 10 Next Last
MC34065 MC33065
Figure 17. External Clock Synchronization
15
External 220 pF
1
Sync
Input
3
RT CT 2
4
5
R
Bias
R
20 k
Osc
+
EA1
2R
0.5 V R
The external diode clamp is required if the negative Sync current
is greater than –5.0 mA.
Figure 18. External Duty Cycle Clamp and
Multi–Unit Synchronization
Vref
15
8
4
RA
6 5.0 k
+
7
1
–R
5
5.0 k Q
3
2
+
S
3
2
5.0 k MC1455
R
Bias
R
20 k
Osc
1
RB
C
ǒ Ǔ f+
1.08
RA ) RB
C
4
+
2R
5
EA1
0.5 V
R
To additional MC34065’s
Dmax Drive Output 1 = RAR)BRB
Dmax Drive Output 2 = RAR)ARB
Figure 19. Adjustable Reduction of Clamp Level
VCC
16
Vin
Vref
15
R
5.0 Vref
+
17 V
–+
_
1
Bias
R
20 k
+
+–
_
3
Osc
2
1.0 mA
PWM
Latch 1
Q1
7
4
R2
+
EA1
VClamp
2R
+
0.5 V R
S
Q
R
R1 5
6
ǒ Ǔ ǒ Ǔ [ ) ) ) VClamp
1.67
R2
R1
1
0.33 x 10–3 R1R2
R1 R2
[ Ipk(max)
VClamp
RS
RS
Where: 0 VClamp 0.5 V
Figure 20. Soft–Start Circuit
Vref
15
R
Bias
R
1
20 k
3
Osc
2
1.0 mA
4
1.0 M
+
EA1
2R
0.5 V R
5
C
tSoft–Start 2100 C in µF
10
MOTOROLA ANALOG IC DEVICE DATA
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