K DIAGRAM

COMP
VFF
2
3
1
INV
-
LINE VOLTAGE
FEEDFORWARD
+
40K
2.5V
4
CS
2V
VOLTAGE
REGULATOR
-
+
-
8
VCC
5pF
+
Hiccup-mode
OCP
INTERNAL
SUPPLY
R
Q
S
Q
VCC
20V
R1
+
R2
7
GD
UVLO
DRIVER
-
VREF2
Blanking
START
ZERO CURRENT
DETECTOR
Starter
STOP
+
BLANKING
2.1V
1.6V
STARTER
-
Hiccup-mode
OCP
5
ZCD
DISABLE
6
GND