WRB-YES-1W
＆
WRB-YES-2W
TEMPERATURE CHARACTERISTICS
Parameter
Storage humidity range
NO-load power consumption
Operating temperature
Storage temperature
Lead temperature
Temp.rise at full load
Cooling
Case material
Short circuit protection
*
MTBF
Weight
1000
6.6
1.5mm from case for 10 seconds
15
-25
-55
120
71
125
300
35
TYPICAL CHARACTERISTICS
Min.
Typ.
Max.
95
Conditions
Units
%
°C
°C
°C
°C
°C
Temperature Derating Graph
Free air convection
Non-Conductive Plastic(UL94-V0)
Continuous,automatic recovery
K hours
g
*Supply voltage must be discontinued at the end of short circuit duration.
INPUT SPECIFICATIONS
Parameter
Input voltage
Input filter
conditions
2:1 input range
Pi network
RECOMMENDED CIRCUIT
OUTPUT GRAPH
SIMPLIFIED SCHEMATIC
ISOLATION SPECIFICATIONS
Parameter
Isolation test voltage
Isolation resistance
Isolation capacitance
Test conditions
Flash tested for 1 minute and 1mA max
Test at Viso=500VDC
100KHz,1v
Min.
1500
1000
Typ.
Max.
Units
VDC
MΩ
35
80
pF
APPLICATION NOTE
SIZE Graph
1) Recommended circuit
If you want to further decrease the input/output ripple, an ”LC” filtering network may be connected to the input and output
ends of the DC/DC converter, see (Figure 1). Lin 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:
5V,12V
24V,48V
Cout:
Lin:
Lout:
47PF(typ.)
4.7PH ~120PH
2.2PH ~10PH
100PF
10uF
TYPICAL APPLICATIONS
2) Input current
While using unstable power source, please ensure the output voltage and ripple voltage do not exceed indexes of the
converter. The preceding power source must be able to provide for converter sufficient starting current Ip.
General: Ip≤1.4*Iin-max
3) No parallel connection or plug and play
EXTERNAL CAPACITOR TABLE (TABLE 1)
Single Vout
Cout
(VDC)
5
9
12
15
(μF)
680
560
470
330
Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646
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