Samsung Electronics
13-1
13. Circuit Operating Descriptions
13-1 Power
13-1-1 Comparsion between Linear Power Supply and S.M.P.S.
13-1-1 (a) Linear
Vreg
Vin
+
–
+
+
–
Vs
(Ns)
Vp
(Np)
REGULATOR
Common power
(Ex.120V 60Hz)
Fig.13-1 Linear Power Supply
◆
Waveform/Description
Vp
t
0
Fig. 13-2
Vs
t
0
Fig. 13-3
Vout
t
0
Fig. 13-4
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.
