參數(shù)資料
型號： PT4666A
廠商： Texas Instruments, Inc.
英文描述： 30-A Dual Output Isolated DC/DC Converter
中文描述： 30雙輸出隔離式DC / DC轉(zhuǎn)換器
文件頁數(shù)： 13/17頁
文件大?。?/td> 339K
代理商： PT4666A
Application Notes
For technical support and further information, visit http://power.ti.com
Adjusting the Output Voltage of the PT4660
& PT4680 Series of Dual-Output Converters
The dual output voltages from the PT4660 (48-V Bus),
and PT4680 (24-V Bus) series of DC/DC converters can
be independently adjusted by up to 10 %, higher or lower
than the factory trimmed pre-set voltage. The adjustment
method requires the addition of a single external resistor
1
.
Table 3-1 gives the adjustment range of Vo
1
and Vo
2
for
each model in the series as V
a
(min) and V
a
(max).
Vo
1
Adjust Down:
Add a resistor
(R
1
)
, between pin 13
(
Vo
1
Adj
) and pin 12 (
Vo
1
)
2
.
Vo
1
Adjust Up:
To increase the output, add a resistor R
2
between pin 13 (
Vo
1
Adj
) and pin 14 (
COM
)
2, 4
.
Vo
2
Adjust Down:
Add a resistor
(R
3
)
between pin 20
(
Vo
2
Adj
) and pin 21 (
Vo
2
)
2
.
Vo
2
Adjust Up:
Add a resistor R
4
between pin 20
(
Vo
2
Adj
) and pin 19 (
COM
)
2, 4
.
Refer to Figure 3-1 and Table 3-2 for both the placement and
value of the required resistor.
Notes:
1. Adjust resistors are not required if Vo
1
and Vo
2
are to
remain at their respective nominal set-point voltage.
In this case,
Vo
1
Adj
(pin 13) and
Vo
2
Adj
(pin 20) are
left open-circuit
2. Use only a single 1% resistor in either the
(R
1
)
or R
2
location to adjust Vo
1
, and in the
(R
3
)
or R
4
location
to adjust Vo
2
. Place the resistor as close to the converter
as possible.
Figure 3-1; Placement of Output Adjust Resistors
3. Vo
2
must always be at least 0.3 V lower than Vo
1
.
4.
The over-voltage protection
threshold is fixed, and is set
nominally 25 % above the set-point output voltage.
Adjusting Vo
1
or Vo
2
higher will reduce the voltage
margin between the respective steady-state output
voltage and its over-voltage (OV) protection threshold.
This could make the module sensitive to OV fault
detection, as a result of random noise and load tran-
sients.
Note: An OV fault is a latched condition that shuts down
both outputs of the converter. The fault can only be cleared
by cycling one of the Enable control pins (EN
1
* / EN
2
), or
by momentarily removing the input power to the module.
5. Never connect capacitors to either the
Vo
1
Adj
or
Vo
2
Adj
pins. Any capacitance added to these control
pins will affect the stability of the respective regulated
output.
The adjust up and adjust down resistor values can also be
calculated using the following formulas. Be sure to select
the correct formula parameter from Table 3-1 for the
output and model being adjusted.
(R
1
)
or
(R
3
)
=
R
o
· (V
a
– V
r
)
(V
o
– V
a
)
– R
s
k
R
2
or R
4
=
R
o
· V
r
V
a
– V
o
– R
s
k
Where: V
o
= Original output voltage, (
Vo
1
or
Vo
2
)
= Adjusted output voltage
= The reference voltage from Table 3-1
R
o
= The resistance constant in Table 3-1
R
s
= The series resistance from Table 3-1
V
a
V
r
PT4660 & PT4680 Series
PT4660
+Vin
EN 1*
EN 2
–Vin
Vo
1
adj
Vo
2
adj
Vo
1
Vo
2
COM
9–12
21–24
14–19
L
O
A
D
L
O
A
D
Vo
1
Vo
2
+V
IN
–V
IN
20
13
1
4
3
2
COM
* Inverted logic
R2
(R1)
(R3)
R4
相關(guān)PDF資料
PDF描述
PT4666C 30-A Dual Output Isolated DC/DC Converter
PT4666N 30-A Dual Output Isolated DC/DC Converter
PT4667 5V/1.8V 25A Dual Output 48-V Input Isolated DC/DC Converter
PT4667A 30-A Dual Output Isolated DC/DC Converter
PT4667C 30-A Dual Output Isolated DC/DC Converter
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PT4666C 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 30A Dual Out 48V-Inp Isolated DC-DC 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
PT4666N 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 30A Dual Out 48V-Inp Isolated DC-DC 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
PT4667 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-A 24-V Input Dual Output Isolated DC/DC Converter
PT4667A 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V/1.8V 25A Dual Out 48V Inpt Iso DC/DC 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
PT4667C 功能描述:直流/直流開關(guān)轉(zhuǎn)換器 5V/1.8V 25A Dual Out 48V Inpt Iso DC/DC 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)。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進(jìn)入我的后臺，查看報(bào)價(jià)

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*