URF1D12HB-150W Datasheet, PDF (6/8 Pages) MORNSUN Science& Technology Ltd. – Wide input voltage range

DC/DC Converter
URF1D_HB-150W Series
Element model
FUSE
MOV1
C0
C1/C2
C3/C4/C5/C6/C7
C8
CY1
CY2
LDM1
LCM1
EMC solution-recommended circuit PCB layout
Recommended value
Choose according to actual input current
S20K130 (Varistor)
220uF/400V (electrolytic capacitor)
100uF/400V (electrolytic capacitor)
2.2uF/250V
220 uF/50V(electrolytic capacitor)
2200pF/400VAC (Y Safety capacitor)
3300pF/400VAC (Y Safety capacitor)
10uH (Shielded inductor)
1.0mH, recommended to use MORNSUN’s FL2D-30-102
4. Thermal design
The maximum operating temperature of base- plate TB is 100 ℃, as long as the user's thermal system keeps TB <100 ℃, the converter
can deliver its full rated power. A power derating curve can be calculated for any heatsink that is attached to the base-plate of the
converter. It is only necessary to determine the thermal resistance, Rth(B-A), of the chosen heatsink between the base-plate and the
ambient air for a given airflow rate. This information is usually available from the heatsink vendor. The following formula can the be used to
determine the maximum power the converter can dissipate for a given thermal condition if its base-plate is to be no higher than 100 ºC.
P max
diss

100℃ TA
Rth（B - A）
(TA is ambient temperature)
The maximum load operating power of power supply module at a certain ambient temperature can be calculated by the power
dissipation, Formula is as follows:
Po
max

P max
diss
( ¹ 1)

_{( is converter efficiency)}
Therefore, customers can according to the actual application to choose the right heatsink.
5. Application of Trim and calculation of Trim resistance
+Vot
+Vot
Calculation formula of Trim resistance:
R1
Vref ^R3
R2
RT
Tri m
R1
Vref ^R3
R2
RT
Tri m
up: RT=
aR2
R2-a
-R3
down: RT=
aR1
R1-a
-R3
Vr e f
a= _{Vo’-Vref} R1
a= ^{Vo’-Vref}
Vr e f
R2
0V
0V
Trim up
Trim down
Applied circuits of Trim (Part in broken line is the interior of models)
Note：Value for R1, R2, R3, and Vref refer to the above table 1. RT: Resistance of
Trim. a: User-defined parameter, no actual meanings. Vo’: The trim up/down
voltage.
2016.01.31-A/1
Page 6 of 8
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