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参数资料
| 型号： | PT4507N |
| 厂商： | TEXAS INSTRUMENTS INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 9 W DC-DC REG PWR SUPPLY MODULE |
| 封装： | ROHS COMPLIANT PACKAGE-12 |
| 文件页数： | 6/10页 |
| 文件大小： | 219K |
| 代理商： | PT4507N |
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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相关代理商/技术参数 |
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|---|---|
| PT4508 | 制造商:TI 制造商全称:Texas Instruments 功能描述:20-W 24-V Input Isolated DC/DC Converter |
| PT4508A | 功能描述:DC/DC转换器 2.5V 5A 24V-Input Iso DC-DC Converter 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: |
| PT4508C | 功能描述:DC/DC转换器 2.5V 5A 24V-Input Iso DC-DC Converter 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: |
| PT4508N | 功能描述:DC/DC转换器 2.5V 5A 24V-Input Iso DC-DC Converter 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: |
| PT4509 | 制造商:TI 制造商全称:Texas Instruments 功能描述:20-W 24-V Input Isolated DC/DC Converter |
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