Samsung DVD-P355B/XEV Circuit Operating Descriptions, a Linear, Common power, Ex.120V 60Hz

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

Common power		+	+
	Vp			Vs
(Ex.120V 60Hz)		–	–
	(Np)			(Ns)

Vin Vreg

REGULATOR

+

Fig.13-1 Linear Power Supply

◆Waveform/Description

Vp

0		Input : Common power to transformer (Vp).
	t

	Fig. 13-2
Vs
0		The output Vs of transformer is determined by the ratio
		of 1st Np and 2nd Ns.

tVs = (Ns/Np) x Vp

Fig. 13-3

Vout

0

Vout is output (DC) by diode and condensor.

t

Fig. 13-4

Samsung Electronics 13-1