Datasheet

2
4
6
8
19 20
11
9
Margin Up
V
I
+Sense
+
U1
PTH12040W
V
I
V
I
UVLO Prog
Margin Down
18
Track
12
15
14
V
O
V
O
V
O
–Sense
7 1
Inhibit
17
GND
3 5 10 13 16
V
O
Adjust
C
I
1
R
SET
1
1.5 kW
C
O
1
+
V
I
= 12 V
GND
2
4
6
8
11
9
V
I
+Sense
+
U2
PTH12040W
V
I
V
I
UVLO Prog
12
15
14
V
O
V
O
V
O
–Sense
7 1
Inhibit
17
GND
3 5 10 13 16
V
O
Adjust
C
I
2
R
SET
2
6.34 kW
C
O
2
+
GND
19 20
Margin Up Margin Down
18
Track
7
2
1
3
SENSE
5RESET
6RESET
R
RST
10 kW
C
T
2.2 mF
C
T
0.1 mF
8
U3
TL7712A
RESIN
REF
CT
4
GND
V
CC
UDG-08113
t − Time − 20 ms/div
V
TRK
(1 V/div)
V
0
1 (1 V/div)
V
0
2 (1 V/div)
t − Time − 400 µs/div
V
TRK
(1 V/div)
V
0
1 (1 V/div)
V
0
2 (1 V/div)
PTH12040W
www.ti.com ............................................................................................................................................... SLTS237G – DECEMBER 2004 – REVISED MARCH 2009
Figure 14. Sequenced Power Up and Power Down Using Auto-Track
Figure 15. Simultaneous Power Up With Auto-Track Figure 16. Simultaneous Power Down With Auto-Track
Control Control
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Product Folder Link(s): PTH12040W