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参数资料
| 型号： | FHS42ZHN |
| 厂商： | POWER-ONE INC |
| 元件分类： | 电源模块 |
| 英文描述： | 1-OUTPUT 500 W DC-DC REG PWR SUPPLY MODULE |
| 文件页数： | 9/11页 |
| 文件大小： | 160K |
| 代理商： | FHS42ZHN |
FHS Series – 500W Full-Brick DC/DC Converter
48V Input
Preliminary Data Sheet
12V, 24V, 28V Output
REV. SEP 20, 2002
Page 7 of 11
The equations below determine the trim resistor value
required
to achieve a ΔV change in the output voltage.
+
=
k
Vo
up
Radj
)
2
.
42
%
510
%
%)
100
(
17
.
4
=
k
down
Radj
)
2
.
42
%
510
where ΔV% is the output voltage change expressed in
percents of the nominal output voltage, Vout.
Negative Logic Trim
The negative logic trim unit
trims down with a resistor from trim to Vsense, and
trims up with a resistor from trim to VsenseRTN (see
figure 9).
Fig 9 FHS Negative Trim Schematic
The equations below determine the trim resistor value
required to achieve a new output voltage.
=
k
Voadj
A
up
Radj
20
1
))
225
.
1
/(
*
225
.
1
/(
49
.
2
49
.
2
=
k
Voadj
A
down
Radj
20
1
)
225
.
1
(
03
.
2
/
Model #
A Value
FHS42ZH
21.9
FHS21ZK
46.3
FHS18Z28
54.4
Notes:
1.
When the output voltage is trimmed up, the
output power from the converter must not
exceed its maximum rating.
The power is
determined by measuring the output voltage on
the output pins, and multiplying it by the output
current.
2.
In order to avoid creating apparent load
regulation degradation, it is important that the
trim resistors are connected directly to the
remote sense pins, and not to the load or to
traces going to the load.
3.
The FHS Series converters will trim down
further than the 10% limit.
In general, this is
permissible.
The user must confirm that the
results are acceptable in the application.
Safety Considerations
The FHS Series converters feature 1500 Volt DC
isolation from input to output. The input-to-output
resistance is greater than 10M
. These converters
are provided with Basic insulation between input
and output circuits according to all IEC60950 based
standards.
Nevertheless, if the system using the
converter needs to receive safety agency approval,
certain rules must be followed in the design of the
system.
In particular, all of the creepage and
clearance requirements of the end-use safety
requirements must be observed. These documents
include UL60950 - CSA60950-00 and EN60950,
although other or additional requirements may be
needed for specific applications.
The FHS Series converters have no internal fuse.
The external fuse must be provided to protect the
system from catastrophic failure as shown in Figure
7. The fuse with a rating not greater than 20A is
recommended. The user can select a lower rating
fuse based upon the highest inrush transient at the
maximum input voltage and the maximum input
current of the converter, which occurs at the
minimum input voltage. Both input traces and the
chassis ground trace (if applicable) must be
capable of conducting a current of 1.5 times the
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相关代理商/技术参数 |
参数描述 |
|---|---|
| FHS42ZH-NT | 制造商:Power-One 功能描述:- Bulk |
| FHS44010 | 制造商:n/a 功能描述:Ships in 2 days |
| FHS-440-10 | 制造商:PennEngineering (PEM) 功能描述: |
| FHS44012 | 制造商:n/a 功能描述:Ships in 2 days |
| FHS-440-12 | 制造商:PennEngineering (PEM) 功能描述: |
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