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参数资料
| 型号： | PTEA420033N2AD |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 66 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | PLASTIC, DIP-8 |
| 文件页数： | 3/16页 |
| 文件大小： | 333K |
| 代理商： | PTEA420033N2AD |
t Time 4 ms/div
V
O
(1 V/div)
I
(500 mA/div)
Q1 VDS (5V/div)
t Time 1 ms/div
V
O
(1 V/div)
I
(500 mA/div)
Q1 VDS (5V/div)
L
O
A
D
Sense (–)
Sense (+)
+
(R2)
Adjust
Down
PTEA4200xx
Sense(+)
Sense(–)
5
2
7
Adjust
8
6
4
1
3
+VI
VI
+VI
VI
CO
330
F
+VO
VO
+VO
VO
Remote
On/Off
R1
Adjust
Up
(
)
( )
O
5.11 V
100
%
511
R1
10.22 k
1.224 %
%
+ D
=
-
W
D
( )
100
R2
5.11
10.22 k
%
=
-
W
÷
D
è
www.ti.com
SLTS288C – JUNE 2007 – REVISED OCTOBER 2010
Figure 10. Power Up
Figure 11. Power Down
Adjusting the Output Voltage of the 20–A Rated PTEA Series of Isolated DC/DC Converters
The output voltage adjustment of the PTEA series of isolated DC/DC converters follows the standard adopted by
popular 1/8-brick DC/DC converters. Adjustment is accomplished with a single external resistor that can adjust
the output voltage from –20% to +10% of the nominal set-point voltage. The placement of the resistor determines
the direction of adjustment, up or down, and the value of the magnitude of adjustment.
Adjust Up: To increase the output voltage add a resistor, R1, between VO Adjust (pin 6) and Sense(+) (pin 7).
Adjust Down: Add a resistor, (R2), between VO Adjust (pin 6) and Sense(–) (pin 5).
Refer to Figure 12 for the placement of the required resistor, R1 or (R2).
Figure 12.
The values of R1 [adjust up], and (R2) [adjust down], can be calculated using the following formulas.
(1)
(2)
Where:
Δ% = Amount of adjustment in %
Copyright 2007–2010, Texas Instruments Incorporated
11
Product Folder Link(s): PTEA420025 PTEA420033
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