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参数资料
| 型号： | UWE-5/20-Q48PB-C |
| 厂商： | Murata Power Solutions Inc |
| 文件页数： | 22/27页 |
| 文件大小： | 0K |
| 描述： | DC-DC CONVERT 5V 20A 1/8TH BRICK |
| 标准包装： | 42 |
| 系列： | UWE |
| 类型： | 隔离 |
| 输出数： | 1 |
| 电压 - 输入（最小）： | 18V |
| 电压 - 输入（最大）： | 75V |
| Voltage - Output 1： | 5V |
| 电流 - 输出（最大）： | 20A |
| 电源（瓦） - 制造商系列： | 100W |
| 电压 - 隔离： | 2.25kV（2250V） |
| 特点： | 具有远程开/关功能和 UVLO |
| 安装类型： | 通孔 |
| 封装/外壳： | 8-DIP 模块，1/8 砖 |
| 尺寸/尺寸： | 2.30" L x 0.90" W x 0.39" H（58.4mm x 22.9mm x 9.8mm） |
| 包装： | 托盘 |
| 工作温度： | -40°C ~ 85°C |
| 效率： | 90.5% |
| 电源（瓦特）- 最大： | 100W |
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UWE-100-120W Series
Wide Input, Isolated Eighth-Brick DC-DC Converters
TECHNICAL NOTES
Input Fusing
Certain applications and/or safety agencies may require the installation of
fuses at the inputs of power conversion components. Fuses should also be
used if the possibility of sustained, non-current-limited, input-voltage polarity
reversals exist. For MPS UWE DC-DC Converters, you should use fast-blow type
fuses, installed in the ungrounded input supply line. Refer to the speci?cations
for fuse values.
All relevant national and international safety standards and regulations must
be observed by the installer. For system safety agency approvals, the convert-
ers must be installed in compliance with the requirements of the end-use
safety standard, e.g., IEC/EN/UL60950-1.
Fuse
Input Source Impedance
UWE converters must be driven from a low ac-impedance input source.
The DC-DC’s performance and stability can be compromised by the use of
highly inductive source impedances. For optimum performance, compo-
nents should be mounted close to the DC-DC converter. If the application
has a high source impedance, low V IN models can benefit from increased
external input capacitance.
I/O Filtering, Input Ripple Current, and Output Noise
All models in the UWE Converters are tested/speci?ed for input re?ected ripple
current and output noise using the speci?ed external input/output components/
circuits and layout as shown in the following two ?gures.
External input capacitors (C IN in Figure 3) serve primarily as energy-storage
elements, minimizing line voltage variations caused by transient IR drops in
conductors from backplane to the DC-DC. Input caps should be selected for bulk
+V IN
+V IN
+V O
capacitance (at appropriate frequencies), low ESR, and high rms-ripple-current
ratings. The switching nature of DC-DC converters requires that dc voltage
sources have low ac impedance as highly inductive source impedance can affect
R LOAD
system stability. In Figure 3, C BUS and L BUS simulate a typical dc voltage bus. Your
speci?c system con?guration may necessitate additional considerations.
–V IN
–V IN
–V O
In critical applications, output ripple/noise (also referred to as periodic and
random deviations or PARD) may be reduced below speci?ed limits using ?lter-
Figure 2. Input Fusing
Input Undervoltage Shutdown and Start-Up Threshold
Under normal start-up conditions, devices will not begin to regulate until
the ramping-up input voltage exceeds the Start-Up Threshold Voltage. Once
operating, devices will not turn off until the input voltage drops below the
Undervoltage Shutdown limit. Subsequent re-start will not occur until the input
is brought back up to the Start-Up Threshold. This built in hysteresis prevents
any unstable on/off situations from occurring at a single input voltage.
ing techniques, the simplest of which is the installation of additional external
output capacitors. These output caps function as true ?lter elements and
should be selected for bulk capacitance, low ESR and appropriate frequency
response. All external capacitors should have appropriate voltage ratings and
be located as close to the converter as possible. Temperature variations for all
relevant parameters should also be taken carefully into consideration.
The most effective combination of external I/O capacitors will be a function
of line voltage and source impedance, as well as particular load and layout
conditions.
Start-Up Time
The V IN to V OUT Start-Up Time is the interval of time between the point at which
the ramping input voltage crosses the Start-Up Threshold and the fully loaded
output voltage enters and remains within its speci?ed accuracy band. Actual
TO
OSCILLOSCOPE
CURRENT
PROBE
+VIN
measured times will vary with input source impedance, external input/output
capacitance, and load. The UWE Series implements a soft start circuit that
limits the duty cycle of its PWM controller at power up, thereby limiting the
V IN
+
–
C BUS
L BUS
C IN
input inrush current.
The On/Off Control to V OUT start-up time assumes the converter has its
nominal input voltage applied but is turned off via the On/Off Control pin. The
speci?cation de?nes the interval between the point at which the converter is
C IN = 33μF, ESR < 700mΩ @ 100kHz
C BUS = 220μF, ESR < 100mΩ @ 100kHz
L BUS = 12μH
–VIN
turned on and the fully loaded output voltage enters and remains within its
speci?ed accuracy band. Similar to the V IN to V OUT start-up, the On/Off Control
Figure 3. Measuring Input Ripple Current
to V OUT start-up time is also governed by the internal soft start circuitry and
external load capacitance.
The difference in start up time from V IN to V OUT and from On/Off Control to
V OUT is therefore insigni?cant.
www.murata-ps.com/support
MDC_UWE-100-120W.B07 Page 22 of 27
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相关代理商/技术参数 |
参数描述 |
|---|---|
| UWE-5-20-Q48P-C | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Wide Input, Isolated Eighth-Brick DC/DC Converters |
| UWE-5-3-Q12NB-C | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Wide Input, Isolated Eighth-Brick DC/DC Converters |
| UWE-5-3-Q12N-C | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Wide Input, Isolated Eighth-Brick DC/DC Converters |
| UWE-5-3-Q12PB-C | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Wide Input, Isolated Eighth-Brick DC/DC Converters |
| UWE-5-3-Q12P-C | 制造商:MURATA 制造商全称:Murata Manufacturing Co., Ltd. 功能描述:Wide Input, Isolated Eighth-Brick DC/DC Converters |
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