Philips Semiconductors
Product specification
STARplugTM
TEA152x family
primary
stroke
secondary
stroke
secondary
ringing
handbook, full pagewidth
drain
valley
secondary
stroke
A
B
regulation level
RC
oscillator
MGT423
A: Start of new cycle with valley switching.
B: Start of new cycle in a classical PWM system.
Fig.5 Signals for valley switching.
MGT424
40
handbook, halfpage
phase
(°)
20
0
−20
−40
0
200
400
600
800
f (kHz)
Fig.6 Typical phase of drain ringing at switch-on (at N × Vo = 80 V).
2000 Sep 08
7
NXP [ NXP ]
