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参数资料
| 型号： | QMS07DH |
| 厂商： | Power-One |
| 文件页数： | 15/20页 |
| 文件大小： | 0K |
| 描述： | 19" RACK FOR 3X 48V FRONT END |
| 标准包装： | 4 |
| 系列： | * |
QMS DC-DC Series Data Sheet
Wide-Range Input, 70 to 82W Quarter-Brick Converters
QMS07DH Trim Values
The graphs in Figures 37 thru 42 show the maximum
Δ Vo%
1
2
3
4
5
6
7
8
9
10
Vo Increase
R -UP New Vo
(K ? ) (V DC )
4535 12.12
2287 12.24
1538 12.36
1164 12.48
939 12.60
789 12.72
682 12.84
602 12.96
539 13.08
489 13.20
Δ Vo%
1
2
3
4
5
6
7
8
9
10
Vo Decrease
R -DOWN New Vo
(K ? ) (V DC )
501 11.88
245 11.76
160 11.64
118 11.52
92 11.40
75 11.28
63 11.16
54 11.04
47 10.92
41 10.80
recommended output current of each QMS converter at
various ambient temperatures under both natural and
forced convection cooling (longitudinal airflow direction,
from pin 1 to pin 3). Vin for both 24 VDC and 48 VDC
conditions are shown.
Thermal Measurements
Measurements requiring airflow were made in Power-
One’s vertical wind tunnel equipment using both Infrared
(IR) thermography as well as the traditional thermocouple
method. The converter was soldered to a test board
consisting of a 0.060” thick printed wiring board (PWB)
with four layers. The top and bottom layers were not
metalized. The two inner layers, comprised of two-ounce
copper, were used to provide traces for connectivity to the
converter. The lack of metalization on the outer layers as
well as the limited thermal connection ensured that heat
transfer from the converter to the PWB was minimized.
This provides a worst-case but consistent scenario for
thermal derating purposes.
With the converter installed into the host application,
customer verification that all components are at or below
their safe operating temperatures may be performed
similarly. However, for a more simplified testing method,
Figure 35. QMS07DH Trim Characteristics
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 be
connected directly to the remote sense pins, and not to the
load or to traces going to the load.
3. The output voltage increase can be accomplished either by
the trim or by the remote sense or by the combination of
both. In any case, the absolute maximum output voltage
increase shall not exceed the limits defined in the Features
Specification section above.
4. Either Rup or Rdown should be used to adjust the output
voltage according to the equations above. If both Rup and
Rdown are used simultaneously, they will form a resistive
divider and the equations above will not apply.
Thermal Considerations
QMS converters are designed for both natural and forced
convection cooling. To achieve long term reliability, the
recommended power derating curves below, were
established by comparing measured junction and hot spot
temperatures against those allowed per Power-One’s
component derating guidelines
monitoring the converter’s designated thermal reference
point (T C ) will yield effective results.
The recommended location of the measuring
thermocouple is shown below. This reference point should
be maintained at < 125 O C.
It is recommended to use a 32AWG to 40AWG
thermocouple wire probe on the location identified below;
labeled T C
Figure 36. Thermal Reference, T C .
(QMS25DE shown)
MCD10143 Rev.1.1, 30--Aug-10
Page 15 of 20
www.power-one.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| QMS07DHG | 制造商:Power-One 功能描述:Module DC-DC 1-OUT 12V 7A 81W 8-Pin Quarter-Brick 制造商:Power-One 功能描述:DC/DC PS SGL-OUT 12V 7A 81W 8PIN QUARTER-BRICK - Bulk |
| QMS07DH-G | 功能描述:DC/DC转换器 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: |
| QMS07DH-N | 功能描述:FRONT PANEL 4TE RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:* 标准包装:5 系列:* |
| QMS07DH-N7 | 制造商:Power-One 功能描述:Module DC-DC 1-OUT 12V 7A 81W 8-Pin Quarter-Brick |
| QMS07DH-N7G | 制造商:Power-One 功能描述: |
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