Samsung HP-R5052 Service Manual page 98

Circuit Description
1. Outline (PDP 42inch/50inch 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(Schubert)/50inch(Strauss), VS requiring high power consumption Asymmetrical Half
Bridge converter and flyback converter. To comply with the international harmonics standards and improve the power factor, active
PFC(Power Factor Correction) was used to rectify AC input into +400V DC output, which in turns used as input to the switching
regulator.
2. Input
The power supply shall be capable of supplying full rated output power over free voltage ranges that are rated 100 VAC - 240 VAC
RMS nominal. Operating voltage : 90 VAC - 264 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 & Vpr2(3.3V) is a SELV standby voltage that is always present when AC mains voltage present.
3. Output
Output Name
VS
VA
D5.3V
A6.5V
FAN_9V
VG
D12V
A12V
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
circuitry and reference. No single point fault shall be able to cause a sustained over voltage condition on any or all outputs.
The supply shall provide latch-mode Over Voltage Protection as defined below.
Parameter
VS(210V)
VA(70V)
VCC(+5.3V)
5. Short Circuit and Over current Protection
An output short circuit is defined as output impedance of less than 300mohms. The power supply shall shutdown and latch off for
shorting VS DC rails to return. Shorts between main output rails and STD_5V shall not cause any damages to the power supply.
The power supply shall either shutdown and latch off until the short condition is removed, at which point the P/S shall recover.
The power supply shall be capable of withstanding a continuous short-circuit to the output without damage or over stress to the
unit (components, PCB traces,connectors,etc.) under the input conditions specified in Section 3 above. Current Protection as
defined below.
Output
VS(210V)
VA(70V)
Output except Vs,Va
13-6
Output Voltage
+190V ~ 220V (210V)
+60V ~ 80V (70V)
+5.3V
+6.5V
+9V
+15V
+12V
+5.3V
+18V
+33V
+5V
Min
250 ~
100 ~
6.8 ~
Over Current Limit
20A, Constant Current.(TBD)
10A, Constant Current.(TBD)
No damage (Auto Recovery or Shut down.)
Output Current(Max.)
2.0A
3.0A
5.0A
3.0A
0.2A
1.0A
1.5A
0.5A
2.5A
0.006A
1.0A
Unit
V
V
V
Unit
Using in PDP Driving
Sustain Voltage of Drive Board
Address Voltage of Drive Board
Amp Voltage of Audio Board
Standby for Remote Control
A
A
A
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