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參數(shù)資料
| 型號： | LSN2-T/6-W3NG-C |
| 廠商： | MURATA POWER SOLUTIONS INC |
| 元件分類： | 電源模塊 |
| 英文描述： | 1-OUTPUT 19.8 W DC-DC REG PWR SUPPLY MODULE |
| 封裝： | ROHS COMPLIANT, SIP-7 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大?。?/td> | 302K |
| 代理商： | LSN2-T/6-W3NG-C |
LSN2 Series
Non-isolated, DOSA-SIP, 6/10/16A
Selectable-Output DC/DC Converters
www.murata-ps.com
email: sales@murata-ps.com
25 Jun 2010
MDC_LSN2.B07Δ Page 6 of 15
Figure 2. Measuring Input Ripple Current
Output ripple/noise (also referred to as periodic and random deviations or
PARD) may be reduced below specied limits with the installation of additional
external output capacitors. Output capacitors function as true lter elements
and should be selected for bulk capacitance, low ESR, and appropriate fre-
quency response. Any scope measurements of PARD should be made directly
at the DC/DC output pins with scope probe ground less than 0.5" in length.
All external capacitors should have appropriate voltage ratings and be located
as close to the converters as possible. Temperature variations for all relevant
parameters should be taken into consideration.
Figure 3. Measuring Output Ripple/Noise (PARD)
The most effective combination of external I/O capacitors will be a function
of your line voltage and source impedance, as well as your particular load and
layout conditions.
Input Fusing
Most applications and or safety agencies require the installation of fuses
at the inputs of power conversion components. The LSN2 Series are not
internally fused. Therefore, if input fusing is mandatory, either a normal-blow
or a slow-blow fuse with a value no greater than twice the maximum input
current calculated at low line with the converter's minimum efciency should
be installed within the ungrounded input path to the converter.
Safety Considerations
LSN2 SIPs are non-isolated DC/DC converters. In general, all DC/DC’s must
be installed, including considerations for I/O voltages and spacing/separation
requirements, in compliance with relevant safety-agency specications (usually
UL/IEC/EN60950-1).
In particular, for a non-isolated converter’s output voltage to meet SELV
(safety extra low voltage) requirements, its input must be SELV compliant. If
the output needs to be ELV (extra low voltage), the input must be ELV.
Input Overvoltage and Reverse-Polarity Protection
LSN2 SIP Series DC/DCs do not incorporate either input overvoltage or input
reverse-polarity protection. Input voltages in excess of the specied absolute
maximum ratings and input polarity reversals of longer than “instantaneous”
duration can cause permanent damage to these devices.
Start-Up Time
The VIN to VOUT Start-Up Time is the interval between the time at which a
ramping input voltage crosses the lower limit of the specied input voltage
range and the fully loaded output voltage enters and remains within its speci-
ed accuracy band. Actual measured times will vary with input source imped-
ance, external input capacitance, and the slew rate and nal value of the input
voltage as it appears to the converter.
The On/Off to VOUT Start-Up Time assumes the converter is turned off via the
On/Off Control with the nominal input voltage already applied to the converter.
The specication denes the interval between the time at which the converter
is turned on and the fully loaded output voltage enters and remains within its
specied accuracy band. See Typical Performance Curves.
Remote Sense
LSN2 Series offer an output sense function. The sense function enables
point-of-use regulation for overcoming moderate IR drops in conductors and/
or cabling. Since these are non-isolated devices whose inputs and outputs
usually share the same ground plane, sense is provided only for the +Output.
The remote sense line is part of the feedback control loop regulating the DC/
DC converter’s output. The sense line carries very little current and consequent-
ly requires a minimal cross-sectional-area conductor. As such, it is not a low-
impedance point and must be treated with care in layout and cabling. Sense
lines should be run adjacent to signals (preferably ground), and in cable and/or
discrete-wiring applications, twisted-pair or similar techniques should be used.
The sense function is capable of compensating for voltage drops between
the +Output and +Sense pins that do not exceed 10% of VOUT.
[VOUT(+) – Common] – [Sense(+) – Common]
d 10%VOUT
Power derating (output current limiting) is based upon maximum output
current and voltage at the converter's output pins. Use of trim and sense
functions can cause the output voltage to increase, thereby increasing output
power beyond the LSN2's specied rating. Therefore:
(VOUT at pins) x (IOUT)
d rated output power
The internal 10.5
: resistor between +Sense and +Output (see Figure 1)
serves to protect the sense function by limiting the output current owing
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| LSN-3.3/10-D12BH | 功能描述:DC/DC轉(zhuǎn)換器 33W 12V to 3.3V 10A 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）: 安裝風格:SMD/SMT 封裝 / 箱體尺寸: |
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