WRA-YD-2W&WRB-YD-2W
Series
COMMON SPECIFICATIONS
Parameter
Output power
Positive voltage accuracy
Negative voltage accuracy
Load regulation
Line regulation
Temperature drift
Ripple & Noise**
Switching frequency
TYPICAL CHARECTERISTICS
Min.
0.2
±1
±3
±0.5
±0.2
Test conditions
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
100% load, input voltage range
Typ.
Max
2
±3
±5
±1*
±0.5
±0.03
Units
W
%
%
%
%
%/℃
mVp-p
KHz
50
300
100
*Dual output models unbalanced load:
±5%.
**Test ripple and noise by
“parallel
cable”method. See detailed operation instructions at Testing of
Converter section, application notes.
Power
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.
RECOMMENDED CIRCUIT
2) Recommended Circuit
All the WRA_YD-2W & WRB_YD-2W series have been tested according to the following
recommended testing circuit before leaving factory (Figure 1). This series should be tested under load.
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:
Cin:
12V
24V
100µF
10µF~47µF
Cout: 10µF/100mA
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 (Figure 2)
General: Ip
≤1.4*Iin-max:
4) No parallel connection or plug and play
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
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