The copyright and authority for the interpretation of the products are reserved by MORNSUN

Specifications subject to change without notice.

URB_LD-15W

2013.05.31-A/4

Page 2 of 3

COMMON SPECIFICATIONS

RECOMMENDED CIRCUIT

Item

Test conditions

Min.

Typ.

Max.

Units

Operating temperature

-40

--

85

Storage temperature

-55

--

125

°C

Storage humidity

5

--

95

%

Cooling

Free Air Convection

Maximum Case temp. On working temperature

--

--

105

Lead temperature

1.5mm from case for 10 seconds

--

--

300

°C

Isolation voltage

Tested for 1 minute and 1mA max

1500

--

--

VDC

Isolation resistance

Test at 500VDC

1000

--

--

M

Ω

Isolation capacitance

100kHz /0.1V

--

1000

--

pF

Switching frequency

Nominal, full load

--

300

--

kHz

MTBF

M1L-HDBK-217F

1000

--

--

k hours

Case material

Aluminum Alloy

Weight

--

28

--

g

1) Recommended circuit

Vin

G ND

+ Vo

0V

DC

DC

C in

C o ut

(Fig.1)

In order to obtain better performance for the

DC/DC models. It

’s recommended that use input

and output filters as Fig.1 shown.

2) Recommended capacitance

Capacitance

Output

voltage

Cout

Cin(24V,48V

input)

3.3V,5V

470

μF

12V,15V

220

μF

100

μF

3) No parallel connection or plug and play

TRIM APPLICATION & TRIM RESISTANCE

DERATING & EFFICIENCY CURVE

Application circuit for TRIM (Part in broken line is the interior of models)

0V

Trim

+Vo

0V

Trim

+Vo

Trim up

Trim down

Formula for resistance of Trim

up:

a=

Vref

Vo

’-Vref

R=

T

R -a

2

down:

a=

Vref

Vo

’-Vref

R=

T

R -a

1

Note: Value for R1, R2, R3, and Vref refer to the following table.

a: User-defined parameter, no actual meanings.

Vo

’: The trim up/down voltage

Vo

Resistance

3.3(VDC)

5(VDC)

12(VDC)

15(VDC)

R1(K

Ω)

4.80

2.88

10.97

14.50

R2(K

Ω)

2.86

2.86

2.86

2.86

R3(K

Ω)

15

10

17.8

17.8

Vref(V)

1.24

2.5

2.5

2.5

1) Temperature derating curve

(Output Voltage

≤ 5V)

Operating Temp(

)

C

(Output Voltage > 5V)

Operating Temp(

)

C

2) Efficiency VS nput voltage (Rated load)

URB2405LD-15W

Efficiency VS Input Voltage

70

72

74

76

78

80

82

84

86

88

90

9

12

15

18

21

24

27

30

33

36

Input Voltage (V)

η%

3) Efficiency VS output Load (Nominal input)

URB2405LD-15W

Efficiency VS Output load

0

10

20

30

40

50

60

70

80

90

10

20

30

40

50

60

70

80

90 100

Output load %Io

η%