Datasheet

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t − 10 ms/div
V
O
Bus (1 V/div)
t
d
= 20 ms
V
(POL)
2 (1 V/div)
V
(POL)
1 (1 V/div)
1 5
63
4
2
Track
GNDInhibit
Adjust
1 5
6
3
4
2
Track
GNDInhibit
Adjust
5
1
3
4
5
9
10
8
7
6
2
Track
−Sense
−V
I
NEN
PEN
+Sense
V
O
Bus
V
O
Adjust
V
O
COM
C
I
100 µF
−V
I
+V
I
C2
220 µF
R1
13.7 kΩ
C3
47 µF
U2
PTH04000W
V
O
Bus
(5 V)
V
POL
1
(3.3 V)
V
POL
2
(1.5 V)
C4
47 µF
C6
47 µF
R3
11.5 kΩ
C5
47 µF
R2
475 Ω
V
O
V
I
V
O
U3
PTH04000W
U1
PTB78560A
V
I
+V
I
PTB78560A , PTB78560B
PTB78560C
SLTS249 – JUNE 2005
Figure 29. Power-Up Waveform
Figure 30. Power-Up Sequencing With Nonisolated POL Modules
21
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