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參數(shù)資料
| 型號(hào)： | QKS48T21120-PCCS1G |
| 廠商： | POWER-ONE INC |
| 元件分類(lèi)： | 電源模塊 |
| 英文描述： | 1-OUTPUT 252 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT PACKAGE-5 |
| 文件頁(yè)數(shù)： | 6/9頁(yè) |
| 文件大?。?/td> | 271K |
| 代理商： | QKS48T21120-PCCS1G |
MCD10089 Rev. 1.1, 8-Oct-08
Page 6 of 9
www.power-one.com
QKS48T21120 DC-DC Bus Converter Data Sheet
Quarter-Brick with 48VDC Input; 12VDC @ 21A Output
Safety Considerations
The QKS48T21120 converter features 1500 Volt DC
isolation from input to output. The input-to-output
resistance is greater than 10 M
. This converter is
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 QKS48T21120 converter has no internal fuse.
The external fuse must be provided to protect the
system from catastrophic failure. The fuse with a
rating not greater than 10A 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 value of the fuse without
opening. The fuse must not be placed in the
grounded input line, if any.
In order for the output of the QKS48T21120
converter to be considered as SELV (Safety Extra
Low Voltage) or TNV-1, according to all IEC60950
based standards, one of the following requirements
must be met in the system design:
If the voltage source feeding the module is SELV
or TNV-2, the output of the converter may be
grounded or ungrounded.
If the voltage source feeding the module is ELV,
the output of the converter may be considered
SELV only if the output is grounded per the
requirements of the standard.
If the voltage source feeding the module is a
Hazardous Voltage Secondary Circuit, the
voltage source feeding the module must be
provided with at least Basic insulation between
the source to the converter and any hazardous
voltages. The entire system, including the
QKS48T21120 converter, must pass a dielectric
withstand test for Reinforced insulation. Design
of this type of systems requires expert
engineering and understanding of the overall
safety requirements and should be performed by
qualified personnel.
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