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PTH08T240FAST датащи(PDF) 17 Page - Texas Instruments

номер детали PTH08T240FAST
подробное описание детали  10-A, 4.5-V to 14-V INPUT, NON-ISOLATED POWER MODULE FOR 3-GHz DSP SYSTEMS
PDF  37 Pages
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производитель  TI [Texas Instruments]
домашняя страница  http://www.ti.com
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PTH08T240FAST датащи(HTML) 17 Page - Texas Instruments

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PTH08T240F Type B Capacitors (12-V)
10
7
6
5
4
3
2
1
9
8
C - Capacitance - mF
10
7
6
5
4
3
2
1
9
8
C - Capacitance - mF
(
)
(
)
(
)
O
TT
O
40
1
C
5000
R
k
C
1000
1
é
ù
´
-
ë
û
=
W
é
ù
-
ë
û
(3)
PTH08T240F
www.ti.com........................................................................................................................................ SLTS277C – DECEMBER 2006 – REVISED DECEMBER 2008
12-V INPUT; VO ≥ (VI ÷ 11)
12-V INPUT; VO < (VI ÷ 11)
Figure 16. (VO ≥ VI ÷ 11)
Figure 17. VO < (VI ÷ 11)
Capacitor Type B
Capacitor Type B
Table 5. Type B TurboTrans CO Values and Required RTT Selection Table
Transient Voltage Deviation (mV)
VO ≥ VI/11
VO < VI/11
25% load step
50% load step
75% load step
CO
RTT
CO
RTT
(2.5 A)
(5 A)
(7.5 A)
Minimum
Required
Minimum
Required
Required Output
TurboTrans
Required Output
TurboTrans
Capacitance (
µF)
Resistor (k
Ω)
Capacitance (
µF)
Resistor (k
Ω)
25
50
75
1000
open
1000
open
20
40
60
1000
open
1600
46.4
18
36
54
1050
634
2000
23.7
15
30
45
1300
97.6
3000
8.06
12
24
36
1760
34.0
4900
0.255
10
20
30
2250
17.4
exceeds max
-
8
16
24
3000
8.06
exceeds max
-
5
10
15
7900
short
exceeds max
-
RTT Resistor Selection
The TurboTrans resistor value, RTT can be determined from the TurboTrans programming, see Equation 3.
Where CO is the total output capacitance in µF. CO values greater than or equal to 5000 µF require RTT to be a
short, 0
Ω. (RTT results in a negative value when CO > 5000 µF).
To ensure stability, the value of RTT must be calculated using the minimum required output capacitance
determined from the capacitor transient response charts above.
Copyright © 2006–2008, Texas Instruments Incorporated
Submit Documentation Feedback
17
Product Folder Link(s): PTH08T240F



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