參數(shù)資料
型號(hào)： QME48T40012-PGBL
廠商： POWER-ONE INC
元件分類： 電源模塊
英文描述： 1-OUTPUT DC-DC REG PWR SUPPLY MODULE
文件頁(yè)數(shù)： 35/35頁(yè)
文件大?。?/td> 1435K
代理商： QME48T40012-PGBL
QME48T40 DC-DC Series Data Sheet
36-75 VDC Input; 1.0-3.3 VDC @ 40A Output
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
mountings,
efficiency,
startup
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, 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.
All measurements requiring airflow were made in the
vertical and horizontal wind tunnel using Infrared (IR)
thermography and thermocouples for thermometry.
Ensuring 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. The use of AWG #40 gauge thermocouples
is recommended to ensure measurement accuracy.
Careful routing of the thermocouple leads will further
minimize measurement error. Refer to Fig. H for the
optimum measuring thermocouple locations.
Fig. H: Locations of the thermocouple for thermal testing.
Thermal Derating
Load current vs. ambient temperature and airflow
rates are given in Fig. x.1 and Fig. x.2 for vertical and
horizontal converter mountings. 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).
For each set of conditions, the maximum load current
was defined as the lowest of:
(i) The output current at which any FET junction
temperature does not exceed a maximum specified
temperature of 120 °C
as
indicated
by
the
thermographic image, or
(ii) The nominal rating of the converter (40 A).
During normal operation, derating curves with
maximum FET temperature less or equal to 120 °C
should not be exceeded. Temperature on the PCB at
thermocouple locations shown in Fig. H should not
exceed 120 °C in order to operate inside the derating
curves.
Efficiency
Fig. x.3 shows the efficiency vs. load current plot for
ambient temperature of 25 C, airflow rate of 300 LFM
(1.5 m/s) with horizontal mounting and input voltages
of 36 V, 48 V and 72 V. Also, a plot of efficiency vs.
load current, as a function of ambient temperature
with Vin = 48 V, airflow rate of 200 LFM (1 m/s) with
horizontal mounting is shown in Fig. x.4.
Power Dissipation
Fig. x.5 shows the power dissipation vs. load current
plot for Ta = 25 C, airflow rate of 300 LFM (1.5 m/s)
with horizontal mounting and input voltages of 36 V,
48 V and 72 V. Also, a plot of power dissipation vs.
load current, as a function of ambient temperature
with Vin = 48 V, airflow rate of 200 LFM (1 m/s) with
horizontal mounting is shown in Fig. x.6.
Startup
Output voltage waveforms, during the turn-on
transient using the ON/OFF pin for full rated load
currents (resistive load) are shown without and with
external load capacitance in Figs. x.7-8, respectively.
Ripple and Noise
Fig. x.11 show the output voltage ripple waveform,
measured at full rated load current with a 10 F
tantalum and 1 F ceramic capacitor across the
output. Note that all output voltage waveforms are
measured across a 1 F ceramic capacitor.
The input reflected ripple current waveforms are
obtained using the test setup shown in Fig x.12. The
corresponding waveforms are shown in Figs. x.13-14.
ZD-02057 Rev. 4.1
www.power-one.com
Page 9 of 35
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QME48T40012-PGBOG 制造商:POWER-ONE INC 功能描述:PwrSup;DC-DC Converter;Out 1.2VDC;In 36 to 75VDC;Thru-Hole;Open-Frame;Switching
QME48T40015-NGB0 功能描述:DC/DC轉(zhuǎn)換器 RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
QME48T40015-NGB0G 功能描述:DC/DC轉(zhuǎn)換器 RoHS:否 制造商:Murata 產(chǎn)品: 輸出功率: 輸入電壓范圍:3.6 V to 5.5 V 輸入電壓（標(biāo)稱）: 輸出端數(shù)量:1 輸出電壓（通道 1）:3.3 V 輸出電流（通道 1）:600 mA 輸出電壓（通道 2）: 輸出電流（通道 2）: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體尺寸:
QME48T40015-NGBOG 制造商:POWER-ONE INC 功能描述:PwrSup;DC-DC Converter;Out 1.5VDC;In 36 to 75VDC;Thru-Hole;Open-Frame;Switching
QME48T40015-PGB0 制造商:Power-One 功能描述:DC/DC PS SGL-OUT 1.5V 40A 8PIN QUARTER-BRICK - Bulk
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