Samsung HPR4272CX/XAC Service Manual page 96

Circuit Description
1. Outline (PDP 42inch SMPS)
Considering various related conditions, the switching regulator with good efficiency and allowing for its small size and light weight
was used as the power supply for PDP 42inch, VS requiring high power consumption used flyback converter.
2. Input
The power supply shall be capable of supplying full rated output power over 100 VAC - 120 VAC RMS nominal.
Operating voltage : 90 VAC - 132 VAC
The power supply must be able to start up under peak loading at 90V AC. The power supply shall automatically recover from AC
power loss. (Note that nominal voltages for test purposes are considered to be within +/- 1.0V of nominal).
STD_5V is a SELV standby voltage that is always present when AC mains voltage present.
3. Output
This power supply is 10 output switching power supply for PDP 42inch. The output voltage, and current requirements for continu-
ous operation are stated below. (Table 1)
Table 1. Specification of Output Power Supplies for PDP SMPS
Output Name
VS
VA
VG
D12V
A12V
6.5V
D5.3V
18VAMP
VT
STD_5V
4. Over Voltage Protection
The over voltage sense circuitry and reference shall reside in package that are separate and distinct from the regulator control cir-
cuitry and reference. No single point fault shall be able to cause a sustained over voltage condition on any or all outputs. The sup-
ply shall provide latch-mode Over Voltage Protection as defined below. (Table 2)
Table 2. Over voltage Protection
Parameter
VS(210V)
VA(70V)
D6.5V
13-6
Output Voltage
+190V ~ 220V (210V)
+60V ~ 80V (70V)
+15V
+12V
+12V
+6.5V
+5.3V
+18V
+33V
+5V
Min
250 ~
100 ~
6.8 ~
Output Current(Max.)
1.4A
0.6A
1.0A
1.0A
0.3A
2.5A
4.0A
2.0A
0.006A
1.0A
Unit
V
V
V
Using in PDP Driving
Sustain Voltage of Drive Board
Address Voltage of Drive Board
Driving Voltage of Fet
IC Driving Voltage of Logic Board
Amp Voltage of Audio Board
Standby for Remote Control
Samsung Electronics