DC/DC Converter

WRA_ZP-3WR2 & WRB_ZP-3WR2 Series

2014.04.14-A/3

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WRB2405ZP-

3WR2

50

55

60

65

70

75

80

85

90

95

100

18

21

24

27

30

33

36

Input Voltage(V)

Efficiency Vs input Voltage (Full Load)

WRB2405ZP-

3WR2

20

30

40

50

60

70

80

90

100

10

20

30

4050607080

90 100

Output Current Percentage(%)

Efficiency Vs Output Load(Vin=Vin-nominal)

Design Reference

1. Output load requirements

To ensure that the module can work efficiently and reliably, its output min. load shall be no lower than 5% of the rated load when using, or

the output ripple may increase rapidly. Ensure that the product working load must be higher than 5% of the rated load.

2. Typical application

All the DC/DC converters of this series are tested according to the recommended circuit (see Fig. 2) before delivery.

If it is required to further reduce input and output ripple, properly increase the input & output of additional capacitors Cin and Cout or

select capacitors of low equivalent impedance provided that the capacitance is no larger than the max. capacitive load of the product.

DC

DC

Vin

GND

+Vo

0V

Cin

Cout

Vin

GND

+Vo

0V

Cin

Cout

DC

DC

-Vo

Cout

Dual

Single

Fig. 2

Vin

5V&12V

24V&48V

Cin

100μF10μF~47μF

Cout

10μF

3. EMC solution-recommended circuit

Vin

GND

+Vo

-Vo

(0V)

DC/DC

LOAD

C2

LDM1

②

C0

MOV

FUSE

①

C1

CY

Vin

GND

+

1

C3

Fig. 3