参数资料
| 型号： | SQM48T25010-NDBP |
| 厂商： | Power-One |
| 文件页数： | 6/30页 |
| 文件大小： | 0K |
| 描述： | DC/DC EIGHTH BRICK |
| 标准包装： | 310 |
| 系列： | * |
第1页第2页第3页第4页第5页当前第6页第7页第8页第9页第10页第11页第12页第13页第14页第15页第16页第17页第18页第19页第20页第21页第22页第23页第24页第25页第26页第27页第28页第29页第30页
SQM48 Series Data Sheet
SemiQ
TM
Family 25A DC-DC Converters
The following pages contain specific plots or waveforms as-
sociated 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 cop-
per, were used to provide traces for connectivity to the con-
verter.
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 pur-
poses.
All measurements requiring airflow were made in vertical
and horizontal wind tunnel facilities using Infrared (IR) ther-
mography and thermocouples for thermometry.
Ensuring components on the converter do not exceed their
ratings is important to maintaining high reliability. If one an-
ticipates 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. Thermo-
graphic imaging is preferable; if this capability is not availa-
ble, then thermocouples may be used. Power-One recom-
mends the use of AWG #40 gauge thermocouples to ensure
measurement accuracy. Careful routing of the thermocouple
leads will further minimize measurement error. Refer to Fig-
ure H for optimum measuring thermocouple location.
Thermal Derating
Load current vs. ambient temperature and airflow rates are
given in Fig. x.1 for through-hole version. Ambient tempera-
ture 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 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 tem-
perature did not exceed a maximum specified temperature
(120°C) as indicated by the thermographic image, or
(ii) The nominal rating of the converter (25 A on 2.5 – 1.2 V).
During normal operation, derating curves with maximum FET
temperature less or equal to 120 °C should not be exceeded.
Temperature on the PCB at the thermocouple location
shown in Fig. H should not exceed 118 °C in order to oper-
ate inside the derating curves.
Efficiency
Efficiency vs. load current plot is shown in Fig. x.2 for am-
bient temperature of 25 oC, airflow rate of 300 LFM (1.5 m/s),
vertical converter mounting, and input voltages of 36 V, 48 V
and 72 V.
Start-up
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 Fig.
x.3 and Fig. x.4, respectively.
Ripple and Noise
Fig. x.7 shows the output voltage ripple waveform, measured
at full rated load current with a 10 μF tantalum and 1 μF ce-
ramic capacitor across the output. Note that all output vol-
tage waveforms are measured across a 1 ? F ceramic capa-
citor.
The input reflected ripple current waveforms are obtained
using the test setup shown in Fig x.8. The corresponding
waveforms are shown in Fig. x.9 and Fig. x.10.
MCD10085 Rev. 1.1, 08-Jul-10
Page 6 of 30
www.power-one.com
相关PDF资料 |
PDF描述 |
|---|---|
| 74LVC1G07GW/DG,125 | IC BUFF OPEN DRAIN N-INV 5TSSOP |
| SQM48T25010-NDC0 | DC/DC EIGHTH BRICK |
| SQM48T25010-NDCP | DC/DC EIGHTH BRICK |
| 74LVC1G07GW,125 | IC BUFF OPEN DRAIN N-INV 5TSSOP |
| SQM48T25010-NEC0 | DC/DC EIGHTH BRICK |
相关代理商/技术参数 |
参数描述 |
|---|---|
| SQM48T25010-NDBPG | 制造商:Power-One 功能描述:DCDC,HAZMAT - Bulk |
| SQM48T25010-NDC0 | 功能描述:DC/DC EIGHTH BRICK RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:* 标准包装:250 系列:* |
| SQM48T25010-NDCP | 功能描述:DC/DC EIGHTH BRICK RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:* 标准包装:250 系列:* |
| SQM48T25010-NDCPG | 制造商:Power-One 功能描述:DCDC,HAZMAT - Bulk |
| SQM48T25010-NEC0 | 功能描述:DC/DC EIGHTH BRICK RoHS:否 类别:电源 - 板载 >> DC DC Converters 系列:* 标准包装:250 系列:* |
发布紧急采购，3分钟左右您将得到回复。