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DW20-xxxx の電気的特性と機能

DW20-xxxxのメーカーはYUANです、この部品の機能は「DC/DC Converter」です。


製品の詳細 ( Datasheet PDF )

部品番号 DW20-xxxx
部品説明 DC/DC Converter
メーカ YUAN
ロゴ YUAN ロゴ 




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DW20-xxxx Datasheet, DW20-xxxx PDF,ピン配置, 機能
SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
DW15~20W SERIES DC-DC CONVERTER
www.DataSheet4U.com
RATED 15~20W OUTPUT
HIGH POWER DENSITY
DIP PACKAGE
SINGLE&DUAL OUTPUT
INDUSTRIAL STANDARD PIN-OUT
NO HEAT SINK REQUIRED
1KVDC ISOLATION
WIDE INPUT
REGULATED OUTPUT
PCB MOUNTING
OVER CURRENT&SHORT CIRCUIT PROTECTION
ELECTRICAL SPECIFICATIONS
All specifications tested typically @ 25°C, humidity<75%, nominal input and rated output unless otherwise noted.
OUTPUT SPECIFICATIONS
Items:
Output accuracy:
Line regulation:
Load regulation:
Ripple and noise:
Output Threshold Current
Output Limiting Protection
Output Short Circuit Protection
Start-up Time
Dynamic Respond Speed
Testing condition
From 10% to100% load
Full load
From 0% to full load
(20MHz Bandwidth)
Min Typ
Max
Main circuit: 1.0%maxVice-circuit:1.5%max
Main output: 0.2%max, Secondary:0.5%max
Main output: 0.5%max
Secondary: 1.0%max
Vo5V, Vp-p max50mV, Vo48V, V p-p
max200mV, Other output, V p-p max100mVp-pm
110% Rated Output Current
120%Protection, Automatically recovery
Continuous Protection, Automatically recovery
500ms
25% Negative LoadFull load
150us
INPUT SPECIFICATIONS
Items:
Input Current Range
Input filter
Remote Control
Testing condition
24VDC
48VDC
Min
Pi
Switch on: >2.5VDC
Typ
18-36VDC
36-72VDC
Max
Copyright @ Shenzhen Sunyuan Technology Co., Ltd.
Edition-SZSY-07-01
Printed in P.R.C January 2007 Page 1 of 4

1 Page





DW20-xxxx pdf, ピン配列
SHENZHEN SUNYUAN TECHNOLOGY CO., LTD.
DW15~20W SERIES DC-DC CONVERTER
CwwOwN.DNaEtaCShTeIeNt4UG.cDomC-DC CONVERTERS IN SERIES
Galvanic isolation of the output allows multiple converters to be connected in series simply by connecting the positive output of one converter to the
negative of another (see figure 1). In this way, non-standard voltage rails can be generated, however, the current output of the highest output voltage
converter should not be exceeded. When converters are connected in series, additional filtering is strongly recommended as the converters switching
circuits are not synchronized. As well as a summation of the ripple voltages, the output could also produce relatively large beat frequencies. A capacitor
across the output will help, as will a series inductor.
CONNECTING DC-DC CONVERTERS IN PARALLEL
If the available power output from a single converter is inadequate for the application, then multiple converters can be paralleled to produce a higher
output power. However, it is not recommended to parallel converters to generate a higher power output, please select our higher power output modules or
contact us for a customized solution.
It should be noted that it is always preferable to parallel multiple converters of the same type. For instance, if a 2.5W converter is required, then either
2pcs AxxxxS-2W should be used or 3 AxxxxS-1W, not an AxxxxS-2W and an AxxxxS-1W. The reason for this is that the output voltages are not
sufficiently well matched to guarantee that an AxxxxS-2W would supply twice as much as an AxxxxS-1W and the situation would occur where there was
only 1W being drawn from the AxxxxS-2W and 1.5W from AxxxxS-1W. Even with paralleled converters of the same type, loading will be uneven,
however, there is only likely to be around a 10% difference in output load when the output voltages are well matched.
When connecting converter outputs, it should be remembered that the switching will not be synchronous, hence some form of coupling should be
employed. One possible solution is to use a diode feed, this is suitable mainly for 12V and 15V output types only where the diode voltage drop (typically
0.6V) will not significantly affect the circuit functionality (see figure 2). With 5V and 9V supplies the diode drop is generally too large to consider as a
suitable means of connecting paralleled converters. This method also has a beat frequency that will superimpose itself over the ripple of the two
converters, this can be reduced by using an external capacitor at the paralleled output. The preferred method of connecting converters in parallel is via
series inductors on the output (see figure 3). This configuration not only has a lower loss of voltage than the diode method, but by suitable choice of
inductor and an additional external capacitor, the beat frequency can be significantly reduced, as will the ripple from each converter. Suitable values are
given in the table below (see table 1), these typically reduce the beat and ripple frequencies by a factor of 10.
ISOLATION
One of the main features of the majority of Sunyuan components DC-DC converters is the high galvanic isolation capability. This allows several
variations on circuit topography by using a single DC-DC converter. The basic input to output isolation can be used to provide either a simple isolated
output power source, or to generate different voltage rails and /or dual polarity rails. These configurations are most often found in data processing,
instrumentation and other noise sensitive circuits where it is necessary to isolate the load and noise presented to the local power supply rails from that of
an entire system. Usually local supply noise appears as common mode noise at the converter and does not pollute the main system power supply rails.
The isolated positive output can be connected to the input ground rail to generate a negative supply rail if required. Since the output is isolated from the
input the choice of reference for the output side can be relatively arbitrary, for example an additional single rail can be generated above the main supply
rail or offset by some other DC value.
Regulated converters need more consideration than the unregulated type for mixing the reference level. Essentially the single supply rail has a regulator
in its positive output rail only, hence referring the isolated ground will only work if all the current return is through the DC-DC and not via other external
components, such as diode bias, resistor feed. Have an alternative return path can upset the regulation and the performance of the system may not equal
that of the converter. In one word, the isolation features are to generate two completely independent power supply but also united perfectly through the
modern technology. This has been widely used in the application of mixed circuits, A/D, D/A and other circuits that are sensitive to noise.
FILTERING
All Sunyuan isolated DC-DC Converters have a fixed characteristic frequency at which the device operates. This fixed frequency allows filtering that is
relatively simple compared to pulse-skipping types. In a pulse-skipping converter a large range of frequencies are encountered as the device adjusts the
pulse interval for loading conditions.
Copyright @ Shenzhen Sunyuan Technology Co., Ltd.
Edition-SZSY-07-01
Printed in P.R.C January 2007 Page 3 of 4


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部品番号部品説明メーカ
DW20-xxxx

DC/DC Converter

YUAN
YUAN


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