参数资料
型号: PTH04T231WAZT
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, DIP-10
文件页数: 10/36页
文件大小: 1160K
代理商: PTH04T231WAZT
C Capacitance
F
T
ransient
mV/A
40
30
20
4
5000
4000
3000
1000
900
300
200
500
400
700
600
800
2000
10
6
5
8
7
9
PTH04T231 Type A
Ceramic Capacitors
Without TurboTrans
With TurboTrans
C Capacitance
F
T
ransient
mV/A
40
30
20
4
5000
4000
3000
1000
900
300
200
500
400
700
600
800
2000
10
6
5
8
7
9
PTH04T231 Type A
Ceramic Capacitors
Without TurboTrans
With TurboTrans
R
TT + 40
1 * CO 1500
C
O
300 * 1
kW
(2)
SLTS271C – SEPTEMBER 2006 – REVISED MARCH 2009 ............................................................................................................................................. www.ti.com
PTH04T231W - Type A Ceramic Capacitors
5-V Input
3.3-V Input
Figure 10. Capacitor Type A, 100 < C(
F) x ESR(m) ≤
Figure 11. Capacitor Type A, 100 < C(
F) x ESR(m) ≤
1000
(e.g. Ceramic)
Table 4. Type A TurboTrans CO Values and Required RTT Selection Table
Transient Voltage Deviation (mV)
5-V Input
3.3-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 (
F)
Resistor (k
)
Capacitance (
F)
Resistor (k
)
40
80
120
300
open
300
open
35
70
105
320
549
300
open
30
60
90
400
93.1
350
226
25
50
75
510
37.4
450
59.0
20
40
60
700
15.8
610
22.6
15
30
45
1050
4.75
920
7.50
10
20
30
3300
short
2250
short
RTT Resistor Selection
The TurboTrans resistor value, RTT can be determined from the TurboTrans programming equation:
Where CO is the total output capacitance in F. CO values greater than or equal to 1500 F 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.
18
Copyright 2006–2009, Texas Instruments Incorporated
Product Folder Link(s): PTH04T230W PTH04T231W
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