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| 型号： | PTH12030WAZT |
| 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 PACKAGE-13 |
| 文件页数： | 13/26页 |
| 文件大小： | 794K |
| 代理商： | PTH12030WAZT |
C
O
+
C
I
V
I
GND
MarginDown
L
O
A
D
Q2
+V
O
Q1
+
MarginUp
0V
+V
O
R
D
R
U
PT H12010W
( T opView)
1
2
10 9
8
7
6
5
4
3
GND
R
0.1W,1%
SET
SLTS211H – MAY 2003 – REVISED DECEMBER 2008 .................................................................................................................................................... www.ti.com
Table 6. Margin Up/Down Resistor Values
% ADJUST
RU / RD(k)
5
0 k
4
24.9
3
66.5
2
150
1
397
Figure 21. Margin Up/Down Application Schematic
MARGIN UP/DOWN NOTES
1. The Margin Up and Margin Down controls were not intended to be activated simultaneously. If they are their
affects on the output voltage may not completely cancel, resulting in the possibility of a slightly higher error in
the output voltage set point.
2. The ground reference should be a direct connection to the module GND at pin 7 (pin 1 for the PTHxx050).
This will produce a more accurate adjustment at the load circuit terminals. The transistors Q1 and Q2 should
be located close to the regulator.
3. The Margin Up and Margin Down control inputs are not compatible with devices that source voltage. This
includes TTL logic. These are analog inputs and should only be controlled with a true open-drain device
(preferably discrete MOSFET transistor). The device selected should have low off-state leakage current.
Each input sources 8 A when grounded, and has an open-circuit voltage of 0.8 V.
20
Copyright 2003–2008, Texas Instruments Incorporated
Product Folder Link(s): PTH12030W/L
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