Training course: D44
20
SEES Engineering Department
EMI Rectifier
PFC
BUCK CAP.
L7103 & Q7305
AC Brown out
VCC
C7108
Primary
Secondary
Power Block
Signal Block
High Voltage
path
High Current path
Signal path
Comments
Comments
5V O/P rectifier
Controller
U7101
BU5V* 1A
5V Feedback Loop
U7102
PS_ON
System Interface
S13V*2A
13V*0.5A
DCM controller
U7300
AC-DETECT
13V O/P rectifier
ON/OFF switch
FLYBACK
T7101
AC Input
ޓ
220~240Vac
38V O/P rectifier
1
ψ
2 Transformer
1
ψ
2 Transformer
1
ψ
2 Transformer
1
ψ
2 Transformer
1
ψ
2 Transformer
Controller
IC7500
Dimming Control,
Other I/O signal
CCFL
10lamps
8.5mA
1700V Typ.
33.9KHz Typ.
FULL
Bridge
MOS7500
MOS7502
MOS7501
MOS7503
Feedback,
Protections
AC_DET
STB, OFL1,OSC,
REG,REG2,BRT,ADIM
ERR
+
+
+
+
+
-
-
-
-
-
ON/OFF Feedback Loop
U7203
Q7291
Q7265
38V*1.8A
Lamp Open & Shorted
OFL=150Hz
20% min
RUNTKA395WJQZ Power Supply & Inverter Block Diagram (26”)
