WRA

WRA

WRA

WRA

WRA

WRA

WRA

YS-

YS-

YS-

YS-

YS-

YS-

2

2

2

2

2

2

W

W

W

W

W

W

＆

＆

＆

＆

＆

＆

WRB

WRB

WRB

WRB

WRB

WRB

YS

YS

YS

YS

YS

YS

2

2

2

2

2

2

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

120

°C

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

35

°C

Cooling

Free air convection

Case material

Plastic(UL94-V0)

Short circuit protection

*

Continuous,automatic recovery

1

S

MTBF

1000

K hours

Weight

5

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

100KHz,1v

35

pF

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

NOTE

NOTE

NOTE

NOTE

NOTE

NOTE

NOTE

SIZE

SIZE

SIZE

SIZE Graph

Graph

Graph

Graph

1)

1)

1)

1) Recommended

Recommended

Recommended

Recommended circuit

circuit

circuit

circuit

If you want to further decrease the input/output ripple, an ° LC ° filtering network may be connected to the input and

output ends of the DC/DC converter, see (Figure 1). Lin 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

100PF

24V,48V

10uF

Cout:

47PF(typ.)

Lin:

4.7PH ~120PH

Lout:2.2PH ~10PH

Cs:

10uF ~ 22uF

2)

2)

2)

2) CTRL

CTRL

CTRL

CTRL Terminal

Terminal

Terminal

Terminal

When open or high impedance,the converter work well; When this pin is °high°; the converter shutdown; It should be

note that the input

current (Ic) should between 5-10mA, exceeding the maximum 20mA will cause permanence damage to

the converter. The value of R Can be derived as follows :

3)

3)

3)

3) Input

Input

Input

Input current

current

current

current

While using unstable power source, please ensure the output voltage and ripple voltage do not excced indexes of the

converter. The preceding power source must be

able to provide for converter sufficient starting current Ip (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 CAPACITOR TABLE (TABLE 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)

5

680

±5

330

9

560

±12

220

12

470

±15

150

15

330

_

_