URA2405LD-20WR3_15 Datasheet, PDF (4/9 Pages) MORNSUN Science& Technology Ltd. – DC/DC Converter

DC/DC Converter
URA_LD-20WR3 & URB_LD-20WR3 Series
Design Reference
1. Typical application
All the DC/DC converters of this series are tested according to the recommended circuit (see Fig. 2) before delivery.
If it is required to further reduce input and output ripple, properly increase the input & output of additional capacitors Cin and Cout or
select capacitors of low equivalent impedance provided that the capacitance is no larger than the max. capacitive load of the product.
Dual
Vin
Cin
GND
Single
Vin
Cin
GND
Cout
DC DC
Cout
DC DC Cout
Fig. 2
+Vo
0V
-Vo
+Vo
0V
2. EMC solution-recommended circuit
Single Vout Cout Cin Dual Vout Cout Cin
(VDC)
(µF) (µF)
(VDC)
(µF)
(µF)
3.3/5
470
±5
220
9/12/15
220 100 ±9/±12/±15 100
100
24
100
--
--
V in
GND
F US E
MOV
+
C0
①
LDM1
C1
②
CY1
Vin
+Vo
DC /D C
GND
CY2
-Vo
(0 V)
LO A D
C2
Fig. 3
Notes: Part ① in the Fig. 3 is used for EMS test and part ② for EMI filtering;
selected based on needs.
Parameter description
Model
FUSE
MOV
C0
C1
C2
LDM1
CY1/ CY2
Vin:24V
Vin:48V
Choose according to actual input current
S14K35
S14K60
330µF/50V
330µF/100V
1µF/50V
1µF/100V
Refer to the Cout in Fig.2
4.7µH
1nF/2KV
2015.09.28-A/3
Page 4 of 9
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