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

VRA_LD-20WR2 & VRB_LD-20W R2

2013.11.29-A/4

Page 2of9

CE

VRA4805LD-20WR2

48

(36-75)

80

±5

±2000

±100

484

20

30

4800

86

VRA4812LD-20WR2

±12

±834

±42

474

15

800

88

VRA4815LD-20WR2

±15

±667

±34

468

15

500

89

VRA4824LD-20WR2

±24

±417

±21

468

15

300

89

VRB4803LD-20WR2

3.3

5000

250

400

25

18700

86

VRB4805LD-20WR2

5

4000

200

463

25

9600

90

VRB4812LD-20WR2

12

1667

84

469

10

1600

89

VRB4815LD-20WR2

15

1333

67

463

10

1000

90

VRB4824LD-20WR2

24

834

42

468

10

470

89

Note: ①Series with suffix

“H” are heat sink mounting; series with suffix “A2S” are chassis mounting，with suffix “A4S” are DIN-Rail mounting, for example VRB2405LD-

20WHR2A2S is chassis mounting of with heat sink,VRB2405LD-20WR2A4S is DIN-Rail mounting of without heat sink;If the application has a higher

requirement for heat dissipation, you can choose modules with heat sink;

②Absolute maximum rating without damage on the converter;

③For dual-output-converters the given value is for one output (for both outputs the same value);

④The efficiency of "A2S" and "A4S" is approx. 2% lower for the protection of inverse polarity.

INPUT SPECIFICATIONS

Item

Test Conditions

Min.

Typ.

Max.

Unit

Input Surge Voltage (1sec.max.)

12VDC input

-0.7

--

25

VDC

24VDC input

-0.7

--

50

48VDC input

-0.7

--

100

Start-up Voltage

12VDC input

--

--

9

24VDC input

--

--

17.8

48VDC input

--

--

35.8

Under Voltage Shutdown

12VDC input

7.5

--

--

24VDC input

16

--

--

48VDC input

32

--

--

Start-up Time

Nominal input& constant resistance load

--

10

--

ms

Ctrl*

Models ON

Ctrl open or connect TTL high level (2.5-12VDC)

Models OFF

Ctrl connect GND or low level (0-1.2VDC)

Input current (Models OFF)

--

1

--

mA

Input Filter

Pi Filter

Note: *The Ctrl control pin voltage is refer to GND.

OUTPUT SPECIFICATIONS

Item

Test Conditions

Min.

Typ.

Max.

Unit

Positive Voltage Accuracy

--

±1

±3

%

Negative Voltage Accuracy

Output Voltage Balance

Dual output, balanced loads

--

±0.5

±1

Line Regulation

Full load, input voltage from low to high

--

±0.2

±0.5

Load Regulation

10% to 100% load

--

±0.5

±1

Cross Regulation

Dual output, main output 50% load,

Supplement output from 10% to 100% load

--

--

±5

Transient Recovery Time

25% load step change

--

300

500

µs

Transient Response Deviation

--

±3

±5

%

Temperature Drift

Full load

--

±0.02

--

%/

°C

Ripple & Noise*

20MHz bandwidth

--

70

100

mVp-p

Trim

--

±10%

--

VDC

Output Over Voltage Protection

3.3VDC output

--

3.9

--

5VDC output

--

6.2

--

12VDC output

--

15

--

15VDC output

--

18

--

24VDC output

--

30

--

Over Current Protection

Input voltage range

--

150

--

%

Short Circuit Protection

Hiccup, Continuous, automatic recovery

Note: * Ripple and noise tested by

“parallel cable” method. See detailed operation instructions at DC-DC application notes.