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参数资料
| 型号： | PTH12040WAZ |
| 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-20 |
| 文件页数： | 3/27页 |
| 文件大小： | 633K |
| 代理商： | PTH12040WAZ |
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Adjusting the Output Voltage of the PTH12040W Wide-Output Adjust Power Module
Rset + 10 kW
0.8 V
V
O *
0.8 V
* 1.696 kW
(1)
PTH12040W
12
15
9
1
3
5
10 13
16
11
14
+Sense
-Sense
GND
17
+Sense
GND
R
1%
0.05W
SET
V
O
V
O
C
330 F
O
m
C
330 F
O
m
V Adj
O
www.ti.com............................................................................................................................................... SLTS237G – DECEMBER 2004 – REVISED MARCH 2009
The VO Adjust control (pin 17) sets the output voltage of the PTH12040W product. The adjustment range is from
0.8 V to 5.5 V. The adjustment method requires the addition of a single external resistor, RSET, that must be
connected directly between the VO Adjust and GND pins 1. Table 2 gives the preferred value of the external
resistor for a number of standard voltages, along with the actual output voltage that this resistance value
provides. Figure 8 shows the placement of the required resistor.
For other output voltages, the value of the required resistor can either be calculated, or simply selected from the
range of values given in Table 3. The following formula can be used to calculate the adjust resistor value.
Table 2. Standard Values of RSET for Common Output
Voltages
PTH12040W
VO (Required) (V)
RSET (k)
VO (Actual) (V)
5.0
0.210
5.002
3.3
1.50
3.303
2.5
3.01
2.50
2.0
4.99
1.997
1.8
6.34
1.796
1.5
9.76
1.498
1.2
18.2
1.202
1.0
38.3
1.0
0.8
Open
0.8
(1)
A 0.05-W rated resistor may be used. The tolerance should be 1%, and the temperature stability, 100 ppm/°C (or
better). Place the resistor as close to the regulator as possible. Connect the resistor directly between pin 17 and the
nearest GND pin (pin 16) using dedicated PCB traces.
(2)
Never connect capacitors directly from Vo Adjust to either GND or VO. Any capacitance added to the Vo Adjust pin
affects the stability of the regulator.
Figure 8. VO Adjust Resistor Placement
Copyright 2004–2009, Texas Instruments Incorporated
11
Product Folder Link(s): PTH12040W
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|---|---|
| PTH12040WAZT | 功能描述:DC/DC转换器 8.0-14Vin 5.5V 50A 2.045" x1.045"x0.357 RoHS:否 制造商:Murata 产品: 输出功率: 输入电压范围:3.6 V to 5.5 V 输入电压（标称）: 输出端数量:1 输出电压（通道 1）:3.3 V 输出电流（通道 1）:600 mA 输出电压（通道 2）: 输出电流（通道 2）: 安装风格:SMD/SMT 封装 / 箱体尺寸: |
| PTH12045WAD | 制造商:Texas Instruments 功能描述: |
| PTH12045WAZ | 制造商:Texas Instruments 功能描述:- Rail/Tube |
| PTH12050 | 制造商:EMERSON-NETWORKPOWER 制造商全称:Emerson Network Power 功能描述:DC-DC CONVERTERS |
| PTH12050L | 制造商:EMERSON-NETWORKPOWER 制造商全称:Emerson Network Power 功能描述:12 Vin |
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