DC/DC Converter

WRA_S-1WR2 & WRB_S-1WR2 Series

2015.08.26-A/4

Page 2 of 6

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Input Specifications

Item

Operating Conditions

Min.

Typ.

Max.

Unit

Input Current (full load/no-load)

5VDC Input

--

281/40

290/60

mA

12VDC Input

--

111/15

114/30

24VDC Input

--

55/6

57/10

mA

48VDC Input

--

27/4

28/6

Reflected Ripple Current

5VDC Input

--

30

--

12VDC Input

--

40

--

24VDC Input

--

55

--

48VDC Input

--

45

--

Input Impulse Voltage (1sec. max.)

5VDC Input

-0.7

--

12

VDC

12VDC Input

-0.7

--

25

24VDC Input

-0.7

--

50

48VDC Input

-0.7

--

100

Starting Voltage

5VDC Input

--

--

4.5

12VDC Input

--

--

9

24VDC Input

--

--

18

48VDC Input

--

--

36

Input Filter

Filter capacitor

Hot Plug

Unavailable

Ctrl*

Module turn-on

The Ctrl end is suspended or of high resistance

Module turn-off

Connect with high level (relative to the input

grounding) to make the 5-10mA current flows into

the Ctrl end.

Note: * For use of Ctrl, please refer to the “design reference” in this manual.

Output Specifications

Item

Operating Conditions

Min.

Typ.

Max.

Unit

Output Voltage Accuracy

5%-100% load，Input

voltage range

3.3V/5V output

--

±2

±5

%

others

--

±1

±3

No-load Output Voltage Accuracy

Input voltage range

--

±1.5

±5

Balance of Output Voltage

Dual output, balanced load

--

±0.3

±0.5

Line Regulation

Full load, the input voltage is from low to high

--

±0.2

±0.5

Load Regulation

5%-100% load

--

±0.4

±0.75

Transient Recovery Time

25% load step change

--

0.5

2

ms

Transient Response Deviation

--

±2.5

±5

%

Temperature Coefficient

Full load

--

±0.02

±0.03

%/℃

Short Circuit Protection

Continuous, self-recovery

Note: *Ripple and noise are measured by “parallel cable” method, please see DC-DC Converter Application Notes for specific operation.

General Specifications

Item

Operating Conditions

Min.

Typ.

Max.

Unit

Isolation Voltage

Input-output, with the test time of 1 minute and

the leak current lower than 1mA

1500

--

--

VDC

Isolation Resistance

Input-output, isolation voltage 500VDC

1000

--

--

MΩ

Isolation Capacitance

Input-output, 100KHz/0.1V

--

120

--

pF

Operating Temperature

Derating if the temperature ≥85℃, (see Fig. 1)

-40

--

85

℃

Storage Temperature

-55

--

125

Pin Welding Resistance Temperature

Welding spot is 1.5mm away from the casing,

10 seconds

--

--

300

Storage Humidity

Non-condensing

--

--

95

%RH

Switching Frequency (PFM Mode)

Full load, nominal input voltage

--

200

--

KHz

MTBF

MIL-HDBK-217F@25℃

1000

--

--

K hours