参数资料
型号: PTH08T230WAST
厂商: TEXAS INSTRUMENTS INC
元件分类: 电源模块
英文描述: 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封装: ROHS COMPLIANT
文件页数: 14/39页
文件大小: 1281K
代理商: PTH08T230WAST
C Capacitance
F
T
ransient
mV/A
1000
500
400
300
200
600 700
100
5000
4000
3000
2000
10000
6000
20
10
9
8
7
30
40
50
60
Without TurboTrans
With TurboTrans
C Capacitance
F
T
ransient
mV/A
1000
500
400
300
200
600 700
100
5000
4000
3000
2000
10000
6000
20
10
9
8
7
30
40
50
60
Without TurboTrans
With TurboTrans
R
TT
=40x
1-(C
/1000)
O
5 x(C
/1000)-1
O
(k
)
W
[]
www.ti.com
SLTS265K – NOVEMBER 2005 – REVISED JUNE 2010
PTH08T230W Type C Capacitors
12-V INPUT
5-V INPUT
Figure 16. Capacitor Type C, 5000 < C(mF) x
Figure 17. Capacitor Type C, 5000 < C(mF) x
ESR(m
) ≤ 10,000
ESR(m
) ≤ 10,000
(e.g. OS-CON)
Table 6. Type C TurboTrans CO Values and Required RTT Selection Table
Transient Voltage Deviation (mV)
12 V Input
5 V Input
CO
RTT
CO
RTT
25% load step
50% load step
75% load step
Minimum
Required
Minimum
Required
(1.5 A)
(3 A)
(4.5 A)
Required Output
TurboTrans
Required Output
TurboTrans
Capacitance (mF)
Resistor (k
)
Capacitance (mF)
Resistor (k
)
75
150
225
200
open
200
open
60
120
180
230
205
250
121
50
100
150
300
56.2
310
49.9
40
80
120
390
25.5
400
24.3
30
60
90
570
9.31
580
8.87
25
50
75
720
4.32
730
4.12
20
40
60
960
0.422
980
0.205
15
30
45
3100
short
4000
short
RTT Resistor Selection
The TurboTrans resistor value, RTT can be determined from the TurboTrans programming equation:
(4)
Where CO is the total output capacitance in mF. CO values greater than or equal to 1000 mF require RTT to be
a short, 0
.
To ensure stability, a minimum amount of output capacitance is required for a given RTT resistor value. The
value of RTT must be calculated using the minimum required output capacitance determined from the
capacitor transient response charts above.
Copyright 2005–2010, Texas Instruments Incorporated
21
Product Folder Link(s): PTH08T230W PTH08T231W
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