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WRA_S-3WR2 & WRB_S-3WR2

2013.07.22-A/3

Page 2 of 7

WRA4805S-3WR2

±5

±300

±15

79

1000

79

WRA4812S-3WR2

±12

±125

±6

76

470

82

WRA4815S-3WR2

±15

±100

±5

76

330

82

WRB4803S-3WR2

3.3

758

38

70

2700

75

WRB4805S-3WR2

5

600

30

82

2200

76

WRB4812S-3WR2

12

250

13

78

680

80

WRB4815S-3WR2

15

200

10

75

470

84

WRB4824S-3WR2

48

(36-75)

80

24

125

6

76

7

45

330

82

Note: ①. Absolute maximum rating without damage on the converter, but it isn't recommended;

②. For dual output converter, the given value is the same for each output.

INPUT SPECIFICATIONS

Item

Test Conditions

Min.

Typ.

Max.

Unit

5V input

-0.7

--

12

12V input

-0.7

--

25

24V input

-0.7

--

50

Input Surge Voltage (1sec. max.)

48V input

-0.7

--

100

5V input

3.5

4

4.5

12V input

4.5

8

9

24V input

11

16

18

Start-up Voltage

48V input

24

33

36

VDC

Input Filter

C Filter

Models ON

Ctrl open or be insulated

Ctrl*

Models OFF

Connect high level voltage, and ensure the current into Ctrl

to be 5-10mA

Note: *Please refer to "DESIGN CONSIDERATIONS" as the direction for use of Ctrl.

OUTPUT SPECIFICATIONS

Item

Test Conditions

Min.

Typ.

Max.

Unit

Output Voltage Accuracy

5% to 100% load

--

±1

±3

No-load Output Voltage Accuracy

①

Input voltage range

--

±1.5

±5

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

5% to 100% load

--

±0.6

±1

%

Transient Recovery Time

--

0.5

3

ms

Transient Response Deviation

25% load step change

--

±2.5

±5

%

Temperature coefficient

100% load

--

±0.02

±0.03

%/

°C

Ripple

②

--

30

45

Noise

②

20MHz Bandwidth

--

35

75

mVp-p

Output Short Circuit Protection

Continuous, automatic recovery

Note:

.

① The max. no-load output voltage accuracy for WRB1203S-3WR2 and WRB4803S-3W R2 is

±8%;

.

② Ripple and noise tested with "parallel cable" method. See detailed operation instructions at DC-DC application notes;

The max. output ripple for W RA2405S-3W R2 is 65mVp-p.

COMMON SPECIFICATIONS

Item

Test Conditions

Min.

Typ.

Max.

Unit

Isolation Voltage

Tested for 1 minute, leakage current less than 1 mA

1500

--

--

VDC

Isolation Resistance

Test at 500VDC

1000

--

--

M

Ω

Isolation Capacitance

Input/Output,100KHz/0.1V

--

120

--

pF

Switching Frequency(PFM Mode) 100% load, Nominal Input voltage

--

250

--

KHz

MTBF

MIL-HDBK-217F@25℃

1000

--

--

K hours

Case Material

Plastic（UL94-V0）

Weight

--

4.9

--

g

ENVIRONMENTAL SPECIFICATIONS

Item

Test Conditions

Min.

Typ.

Max.

Unit

Storage Humidity

Non condensing

--

--

95

%

Operating Temperature

Power derating (above85℃,see Figure 5)

-40

--

85

°C