Circuit Operating Description - Samsung DVD-V940K Training Manual

7. Circuit Operating Descriptions
7-1 Power Supply (Free Voltage)
(1) Comparsion between Linear Power Supply and S.M.P.S.
(a) Linear
Common power
(Ex.220V 50Hz)
◆ Waveform/Description
Vs
0
Vs
0
Vout
0
+
Vp
–
(Np)
Fig. 7-1 Linear Power Supply
t
Fig. 7-2
t
Fig. 7-3
t
Fig. 7-4
Vout
+
+
Vs
–
(Ns)
Input : Common power to transformer (Vp).
The output Vs of transformer is determined by the ratio
of 1st Np and 2nd Ns.
Vs = (Ns/Np) x Vp
Vout is output (DC) by diode and condensor.
Circuit Operating Descriptions
REGULATOR
Vreg
7-1