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| 型号： | QD48T025033-NBB0 |
| 厂商： | Power-One |
| 文件页数： | 7/15页 |
| 文件大小： | 0K |
| 描述： | CONV DC-DC 48V IN 3.3/2.5V DUAL |
| 标准包装： | 100 |
| 系列： | QD48 |
| 类型： | 隔离 |
| 输出数： | 2 |
| 电压 - 输入（最小）： | 36V |
| 电压 - 输入（最大）： | 75V |
| Voltage - Output 1： | 2.5V |
| Voltage - Output 2： | 3.3V |
| 电流 - 输出（最大）： | 15A，15A |
| 电源（瓦） - 制造商系列： | 49W |
| 电压 - 隔离： | 2kV（2000V） |
| 安装类型： | 通孔 |
| 封装/外壳： | 7-DIP 模块，1/4 砖 |
| 尺寸/尺寸： | 2.30" L x 1.45" W x 0.34" H（58.4mm x 36.8mm x 8.6mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 88% |
| 电源（瓦特）- 最大： | 49.5W |
| 其它名称： | 179-2235 QD48T025033-NAA0 QD48T025033-NBBO |
QD48T025033 DC-DC Converter Data Sheet
36-75 VDC Input; 2.5 and 3.3VDC @ 15A Outputs
Characterization
General Information
The converter has been characterized for many operational
aspects, to include thermal derating (maximum load current
as a function of ambient temperature and airflow) for vertical
and horizontal mounting, efficiency, start-up and shutdown
parameters, output ripple and noise, transient response to
load step-change, overload and short circuit.
The following pages contain specific plots or waveforms
associated with the converter. Additional comments for
specific data are provided below.
Test Conditions
All data presented were taken with the converter soldered to
a test board, specifically a 0.060” thick printed wiring board
(PWB) with four layers. The top and bottom layers were not
metalized. The two inner layers, comprising 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.
All measurements requiring airflow were made in Power-
One’s vertical and horizontal wind tunnel facilities using
infrared (IR) thermography and thermocouples for
thermometry.
Ensuring that the components on the converter do not
exceed their ratings is important to maintaining high
reliability. If one anticipates operating the converter at or
close to the maximum loads specified in the derating curves,
it is prudent to check actual operating temperatures in the
application. Thermographic imaging is preferable; if this
capability is not available, then thermocouples may be used.
Power-One recommends the use of AWG #40 gauge
thermocouples to ensure measurement accuracy. Careful
routing of the thermocouple leads will further minimize
measurement error. Refer to Figure 34 for optimum
measuring thermocouple location.
Thermal Derating
Available output power and load current vs. ambient
temperature and airflow rates are given in Figs. 8-11.
Ambient temperature was varied between 25°C and 85°C,
with airflow rates from 30 to 500 LFM (0.15 to 2.5 m/s), and
vertical and horizontal converter mounting.
For each set of conditions, the maximum load current was
defined as the lowest of:
(i) The output current at which either any FET junction
temperature did not exceed a maximum specified
temperature (120°C) as indicated by the thermographic
image, or
(ii) The nominal rating of the converter (15 A on either
output)
During normal operation, derating curves with maximum FET
temperature less than or equal to 120°C should not be
exceeded. Temperature on the PCB at the thermocouple
location shown in Fig. 34 should not exceed 118°C in order
to operate inside the derating curves.
Efficiency
Efficiency vs. load current plots are shown in Figs. 12-17 for
ambient temperature of 25oC, airflow rate of 300 LFM (1.5
m/s), both vertical and horizontal orientations, and input
voltages of 36 V, 48 V and 72 V, for different combinations of
the loads on outputs Vout1 and Vout2.
Start-up
Output voltage waveforms during the turn-on transient using
the ON/OFF pin, are shown without and with full rated load
currents (resistive load) in Figs. 18 and 19, respectively.
Ripple and Noise
Figure 30 shows the output voltage ripple waveform,
measured at full rated load current on both outputs with a 1
μF ceramic capacitor across both outputs. Note that all
output voltage waveforms are measured across a 1 μ F
ceramic capacitor.
The input reflected ripple current waveforms are obtained
using the test setup shown in Fig. 31. The corresponding
waveforms are shown in Figs. 32 and 33.
MCD10084 Rev. 1.0, 25-Sep-08
Page 7 of 15
www.power-one.com
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相关代理商/技术参数 |
参数描述 |
|---|---|
| QD48T025033-NBB0G | 制造商:Power-One 功能描述:DC/DC CONVERTER 2.5V 3.3V 87W |
| QD48T025033-NCA0G | 制造商:Power-One 功能描述:DC/DC, 1/4BRICK, 48V IN, DUAL 2.5V & 3.3V OUT, THROUGH HOLE - Bulk |
| QD48T025033-NCB0 | 制造商:Power-One 功能描述:DC/DC PS DUAL-OUT 2.5V/3.3V 15A - Bulk |
| QD48T025033-NCB0G | 制造商:Power-One 功能描述:DC/DC PS DUAL-OUT 2.5V/3.3V 15A - Bulk |
| QD48T025033-NCC0 | 制造商:Power-One 功能描述:DC/DC PS DUAL-OUT 2.5V/3.3V 15A - Bulk |
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