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| 型號(hào)： | PTN04050CAST |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 12 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | DIP-4 |
| 文件頁(yè)數(shù)： | 2/19頁(yè) |
| 文件大?。?/td> | 640K |
| 代理商： | PTN04050CAST |
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SLTS251A
– SEPTEMBER 2005 – REVISED FEBRUARY 2011
Designing for Load Transients
The transient response of the dc/dc converter has been characterized using a load transient with a di/dt of
1 A/
s. The typical voltage deviation for this load transient is given in the data sheet specification table using the
required value of output capacitance. As the di/dt of a transient is increased, the response of a converter's
regulation circuit ultimately depends on its output capacitor decoupling network. This is an inherent limitation of
any dc/dc converter once the speed of the transient exceeds its bandwidth capability. If the target application
specifies a higher di/dt or lower voltage deviation, the requirement can only be met with additional output
capacitor decoupling. In these cases, special attention must be paid to the type, value, and ESR of the
capacitors selected.
If the transient performance requirements exceed those specified in the data sheet, the selection of output
capacitors becomes more important. Obey the minimum ESR and maximum capacitance limits specified in the
Electrical Characteristics table.
Table 3. Recommended Input/Output Capacitors (1)
CAPACITOR CHARACTERISTICS
QUANTITY
85
°C
CAPACITOR VENDOR/
WORKIN
EQUIVALENT
VENDOR
MAXIMUM
PHYSICAL
COMPONENT
G
VALUE
SERIES
INPUT
OUTPUT
NUMBER
RIPPLE
SIZE
SERIES
VOLTAGE
(
F)
RESISTANCE
BUS
CURRENT
(mm)
(V)
(ESR) (
)
(Irms) (mA)
Panasonic FC( Radial)
25
180
0.117
555
8 X 11
1
EEUFC1E181
Panasonic FC (SMD)
25
100
0.30
450
8 X 10,2
1
EEVFC1E101P
United Chemi-Con PXA (SMD)
16
150
0.026
3430
10 X 7,7
1
PXA16VC151MJ80TP (VO≤13V)
PS
25
100
0.020
4320
10 X 12,5
1
25PS100MJ12
LXZ
25
100
0.250
290
6,3 X 11,5
1
LXZ25VB101M6X11LL
MVY(SMD)
35
100
0.300
450
8 X 10
1
MVY35VC101MH10TP
Nichicon UWG (SMD)
50
100
0.300
500
10 X 10
1
UWG1H101MNR1GS
F559 (Tantalum)
10
100
0.055
2000
7,7 X 4,3
1
1 (2)
F551A107MN (VO≤ 5V)
HD
25
100
0.130
405
6,3 X 11
1
UHD1E101MER
Sanyo OS-CON SVP (SMD)
20
100
0.024
2500
8 X 12
1
20SVP100M
SP
16
100
0.032
2890
10 X 5
1
1 (2)
16SP100M (VO≤ 14V)
7,3X 6,1X
TPSV107M020R0085
20
100
0.085
1543
1
1 (2)
3.5
(VO ≤ 10 V)
AVX Tantalum TPS (SMD)
7,3X 6,1X
TPSV107M020R0200
20
100
0.200
> 817
1
1 (2)
3.5
(VO ≤ 10 V)
GRM32ER60J107M
Murata X5R Ceramic
6.3
100
0.002
>1000
3225
1
1 (2)
(VO ≤ 5.5 V)
C3225X5R0J107MT
TDK X5R Ceramic
6.3
100
0.002
>1000
3225
1
1 (2)
(VO ≤ 5.5 V)
Murata X5R Ceramic
16
47
0.002
>1000
3225
2
≤2 (2)
GRM32ER61C476M
C1210C476K9PAC
Kemet X5R Ceramic
6.3
47
0.002
>1000
3225
2
≤2 (2)
(VO ≤ 5.5 V)
C3225X5R0J476MT
TDK X5R Ceramic
6.3
47
0.002
>1000
3225
2
≤2 (2)
(VO ≤ 5.5 V)
GRM422X5R476M6.3
Murata X5R Ceramic
6.3
47
0.002
>1000
3225
2
≤2 (2)
(VO ≤ 5.5 V)
TDK X5R Ceramic
16
22
0.002
>1000
3225
5
≤5 (2)
C3225X5R1E2265KT/MT
Murata X7R Ceramic
25
22
0.002
>1000
3225
5
≤5
GRM32ER61C226K
Kemet X7R Ceramic
16
22
0.002
>1000
3225
5
≤5 (2)
C1210C226K3PAC
(1)
Capacitor Supplier Verification
1. Verify availability of capacitors identified in this table. Capacitor suppliers may recommend alternative part numbers because of
limited availability or obsolete products. In some instances, the capacitor product life cycle may be in decline and have short-term
consideration for obsolescence.
RoHS, Lead-free and Material Details
2. Consult capacitor suppliers regarding material composition, RoHS status, lead-free status, and manufacturing process requirements.
Component designators or part number deviations may occur if material composition or soldering requirements change.
(2)
The maximum voltage rating of the capacitor must be selected for the desired set-point voltage (VO). To operate at a higher output
voltage, select a capacitor with a higher voltage rating.
10
2005–2011, Texas Instruments Incorporated
Product Folder Link(s): PTN04050C
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