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MC33065DW View Datasheet(PDF) - Motorola => Freescale

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MC33065DW Datasheet PDF : 15 Pages
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MC34065 MC33065
Figure 15. Representative Block Diagram
Vin = 15 V
VCC 16
Vref 15
1
Sync Input
3
RT
CT 2
Voltage 4
Feedback 1
5
Compensation 1
2.5 V R
R
Internal
Bias
20 k
Reference
Regulator
+
VCC – +
UVLO –
+
3.6 V
+
Vref
UVLO
Oscillator
+
Error
Amp 1
1.0 mA
2R
Current Sense
Comparator 1
+
0.5 V
R
PWM
Latch 1
S
Q
R
17 V
14 V
Drive Output 1
Q1
7
Current Sense 1
6
RS
Drive Enable
14
Voltage
Feedback 2 13
Compensation 2
12
250 µA
+
Error
Amp 2
1.0 mA
2R
0.5 V
Current Sense
Comparator 2
+
R
PWM
Latch 2
S
RQ
R
Drive Output 2
Q2
10
Current Sense 2
11
RS
Gnd 8
Drive Gnd 9
+
= Sink Only
Positive True Logic
Figure 16. Timing Diagram
Sync Input
Capacitor CT
Latch 1
“Set” Input
Compensation 1
Current Sense 1
Latch 1
“Reset” Input
Drive Output 1
Drive Output 2
Enable
Latch 2
“Set” Input
Compensation 2
Current Sense 2
Latch 2
“Reset” Input
Drive Output 2
8
MOTOROLA ANALOG IC DEVICE DATA
 

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