參數(shù)資料
型號(hào)： NCP1523
廠商： Texas Instruments, Inc.
英文描述： 6-A, 2.2-V to 5.5-V INPUT, NON-ISOLATED, WIDE-OUTPUT, ADJUSTABLE POWER MODULE WITH TurboTrans
中文描述： 6甲，2.2 V至5.5 V輸入，非隔離，寬輸出，可調(diào)電源模塊的TurboTrans
文件頁(yè)數(shù)： 19/35頁(yè)
文件大小： 1128K
代理商： NCP1523
www.ti.com
40
30
20
4
5
4
3
1
9
3
2
5
4
7
6
8
2
10
9
With TurboTrans
Without TurboTrans
6
5
8
7
C Capacitance
μ
F
T
C Capacitance
μ
F
T
Without TurboTrans
With TurboTrans
40
30
20
4
5
4
3
1
9
3
2
5
4
7
6
8
2
10
6
5
8
7
9
R
TT
40
1
C
O
1250
C
O
250
1
k
(3)
PTH04T230W, PTH04T231W
SLTS271A–SEPTEMBER 2006–REVISED OCTOBER 2006
PTH04T230W Type B Capacitors
5-V Input
3.3-V Input
Figure 12. Capacitor Type B, 1000 < C(
μ
F) x ESR(m
)
≤
5000
(e.g. Polymer-Tantalum)
Figure 13. Capacitor Type B, 1000 < C(
μ
F) x ESR(m
)
≤
5000
(e.g. Polymer-Tantalum)
Table 5. Type B TurboTrans C
O
Values and Required R
TT
Selection Table
Transient Voltage Deviation (mV)
5-V Input
3.3-V Input
C
R
C
R
25% load step
(1.5 A)
50% load step
(3 A)
75% load step
(4.5 A)
Minimum
Required Output
Capacitance (
μ
F)
250
300
400
570
710
940
1520
3200
Required
TurboTrans
Resistor (k
)
open
165
46.4
16.9
9.31
3.57
short
short
Minimum
Required Output
Capacitance (
μ
F)
250
300
400
570
720
960
1500
3100
Required
TurboTrans
Resistor (k
)
open
165
46.4
16.9
9.09
3.24
short
short
60
50
40
30
25
20
15
12
120
100
80
60
50
40
30
24
180
150
120
90
75
60
45
36
R
TT
Resistor Selection
The TurboTrans resistor value, R
TT
can be determined from the TurboTrans programming equation:
Where C
is the total output capacitance in
μ
F. C
O
values greater than or equal to 1250
μ
F require R
TT
to
be a short, 0
.
To ensure stability, a minimum amount of output capacitance is required for a given R
TT
resistor value. The
value of R
must be calculated using the minimum required output capacitance determined from the
capacitor transient response charts above.
19
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