MC33368
http://onsemi.com
2
Figure 1. Representative Block Diagram
This device contains 240 active transistors.
 
Restart Delay
Output
Overvoltage
Multiplier/
Error
Amplifier
Current
Sense
WatchdogTimer/
Zero Current Detector
FB
Restart Delay
Comp
Mult
LEB
Current Sense
ZC Det
Frequency
Clamp
Internal Bias
Generator
UVLO
S
S
R
Q
PWM
Line
V
CC
V
ref
AGND
Gate
PGND
Frequency
Clamp
MAXIMUM RATINGS (T
A
 = 25癈, unless otherwise noted)
Rating
Symbol
Value
Unit
Power Supply Voltage (Transient)
V
CC
20
V
Power Supply Voltage (Operating)
V
CC
16
V
Line Voltage
V
Line
500
V
Current Sense, Multiplier, Compensation, Voltage Feedback, Restart Delay and Zero
Current Input Voltage
V
in1
1.0 to +10
V
LEB Input, Frequency Clamp Input
V
in2
1.0 to +20
V
Zero Current Detect Input
I
in
?.0
mA
Restart Diode Current
I
in
5.0
mA
Power Dissipation and Thermal Characteristics
D Suffix, Plastic Package Case 751K
Maximum Power Dissipation @ T
A
 = 70?/SPAN>C
P
D
450
mW
Thermal Resistance, JunctiontoAir
R
qJA
178
癈/W
Operating Junction Temperature
T
J
150
Operating Ambient Temperature
T
A
25 to +125
Storage Temperature Range
T
stg
55 to +150
Stresses exceeding Maximum Ratings may damage the device. Maximum Ratings are stress ratings only. Functional operation above the
Recommended Operating Conditions is not implied. Extended exposure to stresses above the Recommended Operating Conditions may affect
device reliability.
NOTE:   ESD data available upon request.
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