- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69171 > PT4711C (TEXAS INSTRUMENTS INC) 2-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE PDF資料下載
參數(shù)資料
| 型號： | PT4711C |
| 廠商： | TEXAS INSTRUMENTS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 2-OUTPUT 45 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | METAL, SMD-21 |
| 文件頁數(shù)： | 11/13頁 |
| 文件大小： | 349K |
| 代理商： | PT4711C |
Application Notes
For technical support and further information, visit http://power.ti.com
Adjusting the Output Voltages of the PT4711
Dual-Output DC/DC Converters
The PT4711 dual-output DC/DC converter produces
two independently regulated output voltages. The mag-
nitude of each output may be trimmed higher or lower
than the nominal set-point by up to 10%. The adjust-
ment method uses a single external resistor. 1 The value
of the resistor determines the magnitude of adjustment,
and the location of the resistor determines the direction
of adjustment (increase or decrease). The resistor values
can be calculated using a formula (see below). Alterna-
tively the resistor value may be selected directly from
the values given in Table 2-2. The placement of each
resistor is as follows.
Adjust Up:
To increase the magnitude of the output volt-
age, add a resistor R1 between the appropriate Vox Adj
(‘Vo1 Adj’ or ‘Vo2 Adj’) and the respective -Vox voltage
rail. See Figure 2-1(a) and Table 2-1 for the resistor
placement and pin connections.
Figure 2-1b
PT4711
Calculation of Resistor Adjust Values
The adjust resistor value may also be calculated using an
equation. Note that the equation for R1 [Adjust Up] is
different to that for (R2) [Adjust Down].
R1 [Adjust Up]
=
35.75
– 20
k
(Va – Vo )
(R2) [Adjust Down]
=
14.3 (Va – 2.5) – 20 k
(Vo – Va )
Where: Vo = Original output voltage (Vox)
Va = Adjusted output voltage (Vax)
(R
2)
To adjust the Vo
1
or Vo
2 lower
# - See Table 3-1 for pin connections,
where Vo
x indicates Vo1, or Vo2
+Vo
x
Vo
x Adj
+Vo
x
DC/DC
Module
#
–Vo
x
–Vo
x
Figure 2-1a
R
1
To adjust the Vo
1
or Vo
2 higher
# - See Table 3-1 for pin connections,
where Vo
x indicates Vo1, or Vo2
+Vo
x
Vo
x Adj
+Vo
x
DC/DC
Module
#
–Vo
x
–Vo
x
Adjust Down:
To decrease the magnitude of the output
voltage, add a resistor (R2), between the appropriate Vox
Adj (Vo1 Adj or Vo2 Adj,) and the respective +Vox voltage
rail. See Figure 2-1(b) and Table 2-1 for the resistor
placement and pin connections.
Table 2-1; Adjust Resistor Pin Connections
To Adjust Up
To Adjust Down
Connect R1
Connect (R2)
from
to
from
to
Vox Adj
–Vox
Vox Adj
+Vox
Vo1
17
16
17
14
Vo2
21
20
21
18
Notes:
1. Use only a single 1% (or better) tolerance resistor in
either the R1 or (R2) location to adjust a specific output.
Place the resistor as close to the ISR as possible.
2. Never connect capacitors to any of the ‘Vox Adj’ pins. Any
capacitance added to these control pins will affect the
stability of the respective regulated output.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PT4741A | 4-OUTPUT 70 W DC-DC REG PWR SUPPLY MODULE |
| PT4741N | 4-OUTPUT 70 W DC-DC REG PWR SUPPLY MODULE |
| PT4741C | 4-OUTPUT 70 W DC-DC REG PWR SUPPLY MODULE |
| PT4825C | 3-OUTPUT 35 W DC-DC REG PWR SUPPLY MODULE |
| PT4827A | 3-OUTPUT 35 W DC-DC REG PWR SUPPLY MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PT4711N | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 45W Dual 15V Out 48V Inpt Iso DC/DC Cnvtr RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| PT472F100 | 制造商:n/a 功能描述:AF247X100 |
| PT4741 | 制造商:TI 制造商全稱:Texas Instruments 功能描述:70-W Quad-Output DC/DC Converter for DSL |
| PT4741A | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 70W Quad-Outp 48V Inpt DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
| PT4741C | 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 70W Quad-Outp 48V Inpt DC/DC Converter RoHS:否 制造商:STMicroelectronics 最大輸入電壓:4.5 V 開關(guān)頻率:1.5 MHz 輸出電壓:4.6 V 輸出電流:250 mA 輸出端數(shù)量:2 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。