Service manual

Samsung Electronics 6-1
6. Circuit Descriptions
6-1 S.M.P.S.
6-1-1 Comparsion between Linear Power Supply and S.M.P.S.
6-1-1 (a) Linear
Vreg
Vout
+
–
+
+
–
Vs
(Ns)
Vp
(Np)
REGULATOR
Common power
(Ex.120/220V 50/60Hz)
Fig. 6-1 Linear Power Supply
3 Waveform/Description
Vs
t
0
Fig. 6-2
Vs
t
0
Fig. 6-3
Vout
t
0
Fig. 6-4
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.