WRE-YD-6W&WRF-YD-6W Series
TYPICAL CHARACTERISTICS
COMMON SPECIFICATIONS
Item
Test Conditions
Min.
3000
1000
Typ.
Max.
Units
VDC
MΩ
Isolation voltage
Isolation resistance
Tested for 1 minute and 1mA max
Test at 500VDC
*Supply voltage must be discontinued at the end of short circuit duration.
COMMON SPECIFICATIONS
Min
Item
Test Conditions
Typ.
Max.
6
Units
W
.
Output power
See above products program
Refer to recommended circuit
Refer to recommended circuit
From 10% to 100% load
Input voltage from low to high
Refer to recommended circuit
20MHz Bandwidth
0.6
Positive voltage accuracy
Negative voltage accuracy
Load regulation
±1
±3
±3
%
±5
%
±0.5
±0.2
±0.02
20
±1*
±0.5
%
Line regulation(at full load)
Temperature Drift(Vout)
Ripple **
%
%/℃
mVp-p
mVp-p
KHz
50
Noise **
20MHz Bandwidth
75
150
Switching frequency
100% load, input voltage range
300
* Dual output models unbalanced load: ±5%.
**Test ripple and noise by parallel cable”method. See detailed operation instructions at Testing of Power
Converter section, application notes.
*Supply voltage must be discontinued at the end of short circuit duration.
RECOMMENDED CIRCUIT
APPLICATION NOTE
1) Requirement On Output Load
In order to ensure the product operate efficiently and reliably, in addition to a
max load (namely full load), a minimum load is specified for this kind of DC/DC
converter. Make sure the specified range of input voltage is not exceeded, the
minimum output load no less than 10% load. If the actual load is less than the
specified minimum load, the output ripple may increase sharply while its
efficiency and reliability will reduce greatly. If the actual output power is very
small, please add an appropriate resistor as extra loading, or contact our
company for other lower output power products.
2) Recommended Circuit
All the WRE_YD-6W&WRF_YD-6W Series have been tested according to the
following recommended testing circuit before leaving factory. This series
should be tested under load. Never be tested under no load (see Figure 1).
If you want to further decrease the input/output ripple, you can increase
capacitance properly or choose capacitors with low ESR.However, the
capacitance of the output filter capacitor must be proper. If the capacitance is
too big, a startup problem might arise. For every channel of output, provided
the safe and reliable operation is ensured, the greatest capacitance of its filter
capacitor sees (Table 1). General:
General: Cin: 5V&12V
24V&48V 10µF-47µF
Cout: 10µF/100mA
100µF
3) Input Current
When it is used in unregulated power supply, be sure that the fluctuating
range of the power supply and the rippled voltage do not exceed the module
standard. Input current of power supply should afford the startup current of
this kind of DC/DC module(See figure 2),
EXTERNAL CAPACITOR TABLE (TABLE 1)
Output External Capacitor Table (Table 1)
General: Ip ≤1.4*Iin-max
Single Vout
(VDC)
Cout
(uF)
Dual Vout
(VDC)
Cout
(uF)
4) No parallel connection or plug and play
5
1000
470
±5
±12
±15
680
330
220
12
15
330
http://www.microdc.cn
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
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