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Specifications subject to change without notice.

WRA_YMD-6W & WRB_YMD-6W

A/2-2008

Page 2 of 2

COMMON SPECIFICATIONS

Item

Test Conditions

Min

Typ

Max

Units

Storage Humidity Range

95

%

Operating temperature

-40

85

Storage Temperature

-55

125

Lead Temperature

1.5mm from case for 10 seconds

300

Temp. Rise at Full Load

40

°C

Isolation voltage

Tested for 1 minute and 1mA max

1500

VDC

Isolation resistance

Test at 500VDC

1000

M

Ω

Isolation capacitance

Input/Output

100

pF

No-load power consumption

500

mW

Cooling

Free Air Convection

Short Circuit Protection

Continuous, automatic recovery

Case Material

Aluminium alloy

MTBF

1000

K hours

Weight

15

g

Note:

1. All specifications measured at TA=25

°C, humidity<75%, nominal input voltage and rated output load unless

otherwise specified.

2. See below recommended circuits for more details.

TYPICAL CHARECTERISTICS

Operating Temp.(

)

C

100

OUTLINE DIMENSIONS & FOOTPRINT DETAILS

FOOTPRINT DETAILS

Pin

S ingle

Dual

Note:

Unit:mm(i nch)

P in diameter:0.80mm(0.031inch)

P in diameter tolerances: 0.05mm( 0.002inch)

G eneral tolerances: 0.25mm( 0.010inch)

Dual Output

Single Output

First Angle P rojec tion

1

2

3

4

5

GND

Vin

+Vo

0V

GND

Vin

+Vo

0V

-Vo

No Pin

0.50

(0.020)

Bottom view

Side view

25.40

3

(1.000)

10.16

(0.400)

10.16

(0.400)

5.08

(0.200)

APPLICATION NOTE

Requirement on output load

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

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.

Recommended 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).

DC

DC

Vin

GND

+Vout

0V

Cin

Vin

GND

+Vout

0V

Cin

DC

DC

-Vout

Dual Output

Single Output

(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

100

μF

24V&48V

10

μF-47μF

Cout: 10

μF/100mA

Output External Capacitor Table(Table 1)

Single Vout

(VDC)

Cout

(uF)

Dual Vout

(VDC)

Cout

(uF)

3.3

2200

±5

680

5

1000

±9

470

9

680

±12

330

12

470

±15

220

15

330

-

-

24

220

-

-

Input 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

Input Voltage (V)

Input Voltage

Range

Ip

No parallel connection or plug and play.