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MC44602 Datasheet(PDF) 9 Page - Motorola, Inc

Part # MC44602
Description  HIGH PERFORMANCE CURRENT MODE CONTROLLER
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Manufacturer  MOTOROLA [Motorola, Inc]
Direct Link  http://www.freescale.com
Logo MOTOROLA - Motorola, Inc

MC44602 Datasheet(HTML) 9 Page - Motorola, Inc

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MC44602
9
MOTOROLA ANALOG IC DEVICE DATA
Figure 27. Representative Block Diagram
Startup Without Foldback
Figure 28. Timing Diagram
Capacitor CT
2.8V
1.2V
0V
PWM Latch
“Set” Input
Toggle Flip Flop
Q Output
Current Sense
Input
C
VClamp*
C
NC
NC
NC
NC
C
C
C
NC
PWM Latch
“Set” Input
Source Output
Load Detect
Input
2.5V
85mV
0V
Demag Output
Fault Latch Q
Sync Input
2.5V
0V
Startup With Foldback
Normal Operation
Output Overload
*C = Comparison of Current Sense Input With VClamp
NC = No Comparison of Current Sense Input With VClamp
+
Vref
16
7
8
1
3
Sync Input
RT
CT
Compensation
Voltage Feedback
Input
R1
R2
2.5V
R
R
Internal
Bias
3.6V
+
Reference
Regulator
Reference
UVLO
VCC
UVLO
14V
20V
15
VCC
VCC
Demag
Comparator
85mV
Valid Load
Comparator
2.5V
Fault Latch
R
S
Q
10k
Oscillator
1.0 mA
2.5V
Error
Amplifier
2R
R
2.5V
Foldback
Amplifier
1.0V
Gnd
9
Sink Only
Positive True Logic
Current Sense
Comparator
PWM
Latch
Thermal
R
S
Q
R
TQ
18k
Load
Detect
Input
2
14
11
10
6
VC
Source Output
Sink Output
Sink Ground
4, 5, 12, 13
Current Sense Input
Substrate
Vin
Vout
Q1
RS
=
+
CO
I


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