Philips Semiconductors
TEA1622P
STARplugTM
primary
stroke
secondary
stroke
secondary
ringing
drain
valley
secondary
stroke
RC
oscillator
regulation level
A: Start of new cycle with valley switching.
B: Start of new cycle in a classical PWM system.
Fig 3. Signals for valley switching.
A
B
col007
40
phase
(°)
20
001aaa311
0
−20
−40
0
200
400
600
800
f (kHz)
Reflected voltage at N × Vo = 80 V.
Fig 4. Typical phase of drain ringing at switch-on.
9397 750 12578
Product data sheet
Rev. 01 — 17 March 2004
© Koninklijke Philips Electronics N.V. 2004. All rights reserved.
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