WRA

WRA

WRA

WRA

WRA

WRA

WRA

Y

Y

Y

Y

Y

Y

MD

MD

MD

MD

MD

MD

6

6

6

6

6

6

W

W

W

W

W

W

＆

＆

＆

＆

＆

＆

WRB

WRB

WRB

WRB

WRB

WRB

Y

Y

Y

Y

Y

Y

MD

MD

MD

MD

MD

MD

6

6

6

6

6

6

W

W

W

W

W

W

Series

http://www.microdc.cn

Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646

Page 2 of 3

TEMPERATURE

TEMPERATURE

TEMPERATURE

TEMPERATURE

TEMPERATURE

TEMPERATURE

TEMPERATURE

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

Parameter

Parameter

Parameter

Parameter

Conditions

Conditions

Conditions

Conditions

Min.

Min.

Min.

Min.

Typ.

Typ.

Typ.

Typ.

Max.

Max.

Max.

Max.

Units

Units

Units

Units

Storage humidity range

95

%

NO-load power consumption

500

MW

Operating temperature

-40

85

°C

Storage temperature

-55

125

°C

Lead temperature

1.5mm from case for 10 seconds

300

°C

Temp.rise at full load

15

°C

Cooling

Free air convection

Case material

Plastic(UL94-V0)

Short circuit protection

*

Continuous,automatic recovery

Case material

Aluminium alloy

MTBF

1000

K hours

Weight

15

g

*Supply voltage must be discontinued at the end of short circuit duration.

ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

Parameter

Parameter

Parameter

Parameter

Test

Test

Test

Test conditions

conditions

conditions

conditions

Min.

Min.

Min.

Min.

Typ.

Typ.

Typ.

Typ.

Max.

Max.

Max.

Max.

Units

Units

Units

Units

Isolation test voltage

Flash tested for 1 minute and 1mA max

1500

VDC

Isolation resistance

Test at Viso=500VDC

1000

MΩ

Isolation capacitance

Input/Outpu

100

pF

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

NOTE

NOTE

NOTE

NOTE

NOTE

NOTE

NOTE

1)

1)

1)

1) Requirement

Requirement

Requirement

Requirement on

on

on

on output

output

output

output load

load

load

load

In order to ensure the product operate efficiently and reliably, in addition to a max load (namely full

load), a minimum load is specified for this kind of DC/DC converter. Make sure the specified range of

input voltage is not exceeded, the minimum output load no less than 10% load. If the actual load is less

than the specified minimum load, the output ripple may increase sharply while its efficiency and reliability

will reduce greatly. If the actual output power is very small, please add an appropriate resistor as extra

loading, or contact our company for other lower output power products.

2)

2)

2)

2) Recommended

Recommended

Recommended

Recommended Circuit

Circuit

Circuit

Circuit

All the WRA_YMD-6W & WRB_YMD-6W Series have been tested according to the following

recommended testing circuit before leaving factory. This series should be tested under load. Never be

tested under no load (see Figure 1).

If you want to further decrease the input/output ripple,you can increase capacitance properly or

choose capacitors with low ESR. However, the capacitance of the output filter capacitor must be proper.

If the capacitance is too big, a startup problem might arise. For every channel of output,provided the safe

and reliable operation is ensured,the greatest capacitance of its filter capacitor sees (Table 1).

General:

Cin:

5V&12V

100μF

24V&48V

10μF-47μF

Cout: 10PF/100mA

3)

3)

3)

3) Input

Input

Input

Input current

current

current

current

When it is used in unregulated power supply,be sure that the fluctuating range of the power supply

and the rippled voltage do not exceed the module standard.Input current of power supply should afford

the startup current of this kind of DC/DC module (Figure 2).

General: Ip≤1.4*Iin-max

4)

4)

4)

4) No

No

No

No parallel

parallel

parallel

parallel connection

connection

connection

connection or

or

or

or plug

plug

plug

plug and

and

and

and play

play

play

play

TYPICAL

TYPICAL

TYPICAL

TYPICAL

TYPICAL

TYPICAL

TYPICAL

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

Temperature

Temperature

Temperature

Temperature Derating

Derating

Derating

Derating Graph

Graph

Graph

Graph

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

OUTPUT

OUTPUT

OUTPUT

OUTPUT Graph

Graph

Graph

Graph

EXTERNAL

EXTERNAL

EXTERNAL

EXTERNAL CAPACITOR

CAPACITOR

CAPACITOR

CAPACITOR TABLE

TABLE

TABLE

TABLE (TABLE

(TABLE

(TABLE

(TABLE 1)

1)

1)

1)

Single

Single

Single

Single

Single

Single

Single

Vout

Vout

Vout

Vout

Vout

Vout

Vout

Cout

Cout

Cout

Cout

Cout

Cout

Cout

Cout

Dual

Dual

Dual

Dual

Dual

Dual

Dual

Vout

Vout

Vout

Vout

Vout

Vout

Vout

Cout

Cout

Cout

Cout

Cout

Cout

Cout

Cout

(VDC)

(VDC)

(VDC)

(VDC)

((((μ

μ

μ

μF)

F)

F)

F)

(VDC)

(VDC)

(VDC)

(VDC)

((((μ

μ

μ

μF)

F)

F)

F)

3.3

2200

±5

680

5

1000

±9

470

9

680

±12

330

12

470

±15

220

15

330

_

_

24

220

_

_