Acer P221W - Page 41

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#3 Switching element and Isolation power transformer
When the Q601 turns on, energy is stored in the transformer. During Q601 turn-off period,
the stored energy is delivered to the secondary of transformer. R607, C607 and D601 is
a snubber circuit. R625/R626/R627/R628 is current sense resistors to control output
power. (See Fig.4)
L604
45 OHM
L605
45 OHM
L608
45 OHM
+
C606
47U 50V
12
D602
EGP10D
AK
3
T601
450U
1
2
9
10
4
8
6
5
R607
68K J
E3
E2
E4
E5
D601
UF4007-LF
A K
R625
1
R626
1
R627
1
R628
1
Q601
2SK3530-01MR
D
G
S
C607
1000P K
Fig. 4