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D925
C928
C922
400V
5
4
Vcc
D
Startup
C921
UVLO
+
comp
-
Vcc(startup off)
/Vcc(startup on)
Startup
L921
Peak
Burst Peak
Current
Current
Limit
Limit
Soft
Q
drive
GND
3
925
D922
R940
!
4
1
3
2
LF911
!
F902
R904
K5D312BK0012
T3.15AL 250V
!
LF915
3
4
!
C903
C915
2
1
!
HOT
C911
COLD
77
HOT
COLD
!
T920
C972
18 P2
17
2
NC
S3
D971
16 PT
3
S4
C970
15
NC
14 P1
5
S1A
D970
13
6
NC
S1B
12 NC
7
S2A
11
8
V2
S2B
R924
10
V1
#
!
C914
HOT
COLD
IC921
4
1
R971
FEED BACK
2
3
!
RL901
D990
HOT
COLD
POWER ON/OFF CONTROL
NEUTRAL
!
LIVE
!
C910
14V(UN REG)
C973
21V(UN REG)
C971
R970
R972
C975
R976
C974
R973
3
IC970
1
ERROR
REF_2.5V
VOLTAGE
2
DET
STAND-BY 5V
C990
R990
R992
Q990
HOT
COLD
TO PA10
PF10
5
UNR_14V
UNR_21V
1
2
UNR_21V
R974
R975
7
STB_5V
9
AC_ON/OFF
COLD
HOT
TO P9
PF2
NEUTRAL
1
LIVE
4
TH-50PV30E
PF-Board Block Diagram
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