Datasheet

Up
Dn
Sense
V =12V
I
ASIC
VCORE
VCCI O
I 2
O
PTH12010L
1
10
4
5
62
3
9
Tra ck
GND
Inhibit
7
Vadj
Sense
+
V 1=3.3V
O
V 2=1.8V
O
R1
2kW
R5
10k0
R4
100kW
R3
11k0
R1
130 W
C2
330 Fm
C4
330 Fm
C6
0.68 Fm
C5
0.1 Fm
C3
330 Fm
C1
330 Fm
+
+
PTH12020W
7
10
4
5
62
3
9
Tra ck
V
I
V
I
V
O
V
O
GND
Inhibit
1
Adjust
+
TL7702B
V
CC
GND
SENSE
RESIN
REF
CT
RESET
RESET
8
7
2
1
3
5
6
4
+
8
8
t − Time − 10 ms/div
V
O
1 (1 V/div)
V
O
2 (1 V/div)
I
O
2 (5 V/div)
PTV12020W/L
SLTS231C –NOVEMBER 2004–REVISED FEBRUARY 2007 www.ti.com
Figure 17. Prebias Startup Waveforms
Figure 18. Application Circuit Demonstrating Prebias Startup
Notes:
1. Output prebias holdoff is an inherent feature to all PTH120x0L and PTV120x0W/L modules. It has now been
incorporated into all modules (including W-suffix modules with part numbers of the form PTH120x0W), with a
production lot date code of 0423 or later.
2. The prebias start-up feature is not compatible with Auto-Track. If the rise in the output is limited by the
18 Submit Documentation Feedback Copyright © 2004–2007, Texas Instruments Incorporated
Product Folder Links :PTV12020W/L