參數(shù)資料
型號： PTV08T250WAD
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
文件頁數(shù)： 20/30頁
文件大?。?/td> 795K
代理商： PTV08T250WAD
UVLO
Threshold
V (5V/Div)
I
V
(1V/Div)
O
HORIZTAL SCALE:5ms/Div
StartupPeriod
HORIZTAL SCALE:10ms/Div
V 1(1V/Div)
O
V
(1V/Div)
O2
I 2(5 A/Div)
O
ASIC
VC ORE
VC CI O
PTH12010L
1
10
4
5
6
2
3
9
Tra ck
GND
Inhibit
7
Vadj
Sense
+
C2
330 F
m
C4
330 F
m
C6
0.68 F
m
C5
0.1 F
m
C3
330 F
m
C1
330 F
m
R1
2kW
R5
10kW
R4
100kW
R3
11kW
R2
130 W
+
PTH12020W
7
10
4
5
6
2
3
9
Tra ck
V
I
V
I
V =12V
I
V 1=3.3V
O
V 2=1.8V
O
I 2
O
V
O
V
O
GND
Inhibit
1
Up
Adjust
+
TL7702B
V
CC
GND
SENSE
RESIN
REF
CT
RESET
8
7
2
1
3
5
6
4
+
Dn
Sense
8
www.ti.com .......................................................................................................................................... SLTS260E – OCTOBER 2005 – REVISED NOVEMBER 2008
Figure 26. PTH08040W Startup
Figure 27. Prebias Startup Waveforms
Note
1. The prebias start-up feature is not compatible with Auto-Track. If the rise in the output is limited by the
voltage applied to the Track control pin, the output sinks current during the period that the track control
voltage is below that of the back-feeding source. For this reason, it is recommended that Auto-Track be
disabled when not being used. This is accomplished by connecting the Track pin to the input voltage, VI. This
raises the Track pin voltage well above the set-point voltage prior to the module’s start up, thereby defeating
the Auto-Track feature.
Figure 28. Application Circuit Demonstrating Prebias Startup
Copyright 2005–2008, Texas Instruments Incorporated
27
Product Folder Link(s): PTV08T250W
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