參數(shù)資料
型號(hào)： PT4508N
廠商： TEXAS INSTRUMENTS INC
元件分類： 電源模塊
英文描述： 1-OUTPUT 12.5 W DC-DC REG PWR SUPPLY MODULE
封裝： ROHS COMPLIANT PACKAGE-12
文件頁(yè)數(shù)： 6/10頁(yè)
文件大?。?/td> 211K
代理商： PT4508N
Application Notes
For technical support and more information, see inside back cover or visit www.ti.com
Adjusting the Output Voltage of the PT4500/
PT4520 Series of Isolated DC/DC Converters
The factory pre-set output voltage of TI’s PT4500 and
PT4520 series of isolated DC/DC converters may be
adjusted within a nominal ±10% range. Adjustment is made
from the secondary side of the regulator1 with a single
external resistor. For the input voltage range specified in
the data sheet Table 2-1 gives the allowable adjustment
range for each model, as Vo (min) and Vo (max).
Adjust Up:
An increase in the output voltage is obtained
by adding a resistor, R2 between Vo Adjust (pin 12), and
–Vout (pin 7, 8).
Adjust Down:
Add a resistor (R1), between Vo Adjust (pin 12),
and +Vout (pin 9, 10).
Refer to Figure 2-1 and Table 2-2 for both the placement
and value of the required resistor, (R1) or R2.
Notes:
1. The PT4500 and PT4520 series of DC/DC converters
incorporate isolation between the ±Vin and ±Vo
terminals. Adjustment of the output voltage is made
to the regulation circuit on the secondary or output
side of the converter.
2. The maximum rated output power for this series is
20W. An increase in the output voltage may therefore
require a corresponding reduction in the maximum
output current (
see Table 2-1). The revised maximum
output current must be determined as follows.
Io(max) =
20
A,
or 5A, whichever is less.
Va
Where Va is the adjusted ouput voltage.
3. Use only a single 1% resistor in either the (R1) or R2
location. Place the resistor as close to the module as
possible.
Table 2-1
DC/DC CONVERTER ADJUSTMENT RANGE AND FORMULA PARAMETERS
Series Pt #
48V Bus
PT4529
PT4526
PT4527
PT4528
PT4521
PT4522
PT4523
PT4524
24V Bus
PT4509
PT4506
PT4507
PT4508
PT4501
PT4502
PT4503
PT4504
Max Current 2
5A
4A
1.6A
1.3A
Vo(nom)
1.2
1.5
1.8
2.5
3.3
5.0
12.0
15.0
Va(min)
1.05
1.35
1.62
2.25
2.95
4.5
10.8
13.5
Va(max)
1.35
1.65
1.98
2.75
3.65
5.5
13.2
16.5
Vr
0.6125
1.225
2.5
Ko (Vk
)
34.66
67.07
69.7
64.2
69.3
125.2
139.8
137.6
Rs (k
)
150.0
43.2
110.0
187.0
110.0
90.9
Figure 2-1
(R1)
Adj Down
R2
Adjust Up
+V
in
– V
in
+V
o
– V
o
PT4500/4520
+ Vout
–Vout
+Vin
–Vin
Remote
On/Off
V
o (adj)
1
2, 3
4, 5
9,10
7, 8
12
4. Never connect capacitors to Vo adjust. Any
capacitance added to the Vo adjust control pin will
affect the stability of the converter.
The values of (R1) [adjust down], and R2 [adjust up], can
also be calculated using the following formulas.
(R1)
=
Ko(Va – Vr) – R
s
k
Vr (Vo – Va)
R2
=
Ko
– Rs
k
(Va – Vo)
Where Vo = Original output voltage
Va = Adjusted output voltage
Vr = Reference voltage (Table 2-1)
Ko = Multiplier constant (Table 2-1)
Rs = Internal series resistance (Table 2-1)
PT4500/4520 Series
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PT4509 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W 24-V Input Isolated DC/DC Converter
PT4509A 功能描述:DC/DC轉(zhuǎn)換器 1.2V 5A 24-V Input Iso DC/DC Converter 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:
PT4509C 功能描述:DC/DC轉(zhuǎn)換器 1.2V 5A 24-V Input Iso DC/DC Converter 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:
PT4509N 功能描述:DC/DC轉(zhuǎn)換器 1.2V 5A 24-V Input Iso DC/DC Converter 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:
PT4520 制造商:TI 制造商全稱:Texas Instruments 功能描述:20-W 48-V Input Isolated DC/DC Converter
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