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Belinea 103052 Technical Service Manual
CURRENT MODE PWM CONTROLLER
• OPTIMIZED FOR OFF-LINE AND DC TO DC CONVERTERS
• LOW START-UP CURRENT(<1mA)
• AUTOMATIC FEED FORWARD COMPENSATION
• PULSE-BY-PULSE CURRENT LIMITING
• ENHANCED LOAD RESPONSE CHARACTERISTICS
• UNDER-VOLTAGE LOCKOUT WITH HYSTERESIS
• DOUBLE PULSE SUPPRESSION
• HIGH CURRENT TOTEM POLE OUTPUT
• INTERNALLY TRIMMED BANDGAP REFERENCE
• 500KHz OPERATION
• LOW Ro ERROR AMP
PIN CONNECTION
BLOCK DIAGRAM
Comp
Isense
V
FB
V
REF
C
T
R /
T
1
2
3
4
Vcc
Output
GROUND
8
7
6
5
+
+
+
+
+
Vcc
Vcc
Vcc
UVLO
V
rel
8
4
2
1
R1
C1
Voltage
input
Output/
compensation
feedback
Error
amplifier
1.0 mA
2R
R
S
PWM
latch
R
Q
Ground
Current sense
comparator
10 V
R
R
3.6 V
Vref
UVLO
Vc
7
Output
Power ground
Current sense
Input
6
5
3
5
R
5
Q
1
Oscillator
+
2.5V
Reference
regulator
Internal
bias
36 V
7
Vin
KA3843B
Minidip
KA3843B
Содержание Belinea 103052
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