參數(shù)資料
型號： PTH08T240WAD
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
封裝： ROHS COMPLIANT PACKAGE-11
文件頁數(shù)： 3/39頁
文件大?。?/td> 1366K
代理商： PTH08T240WAD
APPLICATION INFORMATION
ADJUSTING THE OUTPUT VOLTAGE
R
=10k
x
SET
W
0.69
V
-0.69
O
-1.43kW
(1)
5
3
4
6
7
GND
8
GND
+Sense
VO
Sense
V Adj
O
PTH08T240W/241W
RSET
1%
0.05W
+Sense
VO
Sense
CO
www.ti.com ................................................................................................................................................... SLTS264J – NOVEMBER 2005 – REVISED JUNE 2009
The Vo Adjust control (pin 8) sets the output voltage of the PTH08T240/241W. The adjustment range is 0.69 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 – Sense pins. Table 1 gives the standard value of the external resistor for a
number of standard voltages, along with the actual output voltage that this resistance value provides.
For other output voltages, the value of the required resistor can either be calculated using the following formula,
or simply selected from the range of values given in Table 2. Figure 11 shows the placement of the required
resistor.
Table 1. Standard Values of RSET for Standard Output Voltages
VO (Standard) (V)
RSET (Standard Value) (k)
VO (Actual) (V)
5.0 (1)
0.169
5.005
3.3
1.21
3.304
2.5
2.37
2.506
1.8
4.75
1.807
1.5
6.98
1.510
1.2 (2)
12.1
1.200
1 (2)
20.5
1.004
0.7 (2)
681
0.700
(1)
For VO > 3.6 V, the minimum input voltage is (VO + 2) V.
(2)
For output voltages
≤ 1.2V, at nominal operating frequency, the output ripple may increase (typically
2×) when operating at input voltages greater than (VO × 11). When using the SmartSync feature,
review the SmartSync application section for further guidance.
(1)
RSET: Use a 0.05 W resistor with a tolerance of 1% and temperature stability of 100 ppm/°C (or better). Connect the
resistor directly between pins 8 and 7, as close to the regulator as possible, using dedicated PCB traces.
(2)
Never connect capacitors from VO Adjust to either + Sense, GND, or VO. Any capacitance added to the VO Adjust pin
affects the stability of the regulator.
Figure 11. Vo Adjust Resistor Placement
Copyright 2005–2009, Texas Instruments Incorporated
11
Product Folder Link(s): PTH08T240W PTH08T241W
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PTH08T240WAH 功能描述:DC/DC轉(zhuǎn)換器 10A 4.5-14V-Input Wide-Out Adj Pwr Mdl RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH08T240WAS 功能描述:DC/DC轉(zhuǎn)換器 10A 4.5-14V-Input Wide-Out Adj Pwr Mdl RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH08T240WAST 功能描述:DC/DC轉(zhuǎn)換器 10A 4.5-14V-Input Wide-Out Adj Pwr Mdl RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH08T240WAZ 功能描述:DC/DC轉(zhuǎn)換器 10A 4.5-14V-Input Wide-Out Adj Pwr Mdl RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
PTH08T240WAZ 制造商:Texas Instruments 功能描述:DC/DC Converter
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