WRD

WRD

WRD

WRD

WRD

WRD

WRD

YS

YS

YS

YS

YS

YS

1

1

1

1

1

1

W

W

W

W

W

W

&

&

&

&

&

&

WRD

WRD

WRD

WRD

WRD

WRD

YS

YS

YS

YS

YS

YS

2

2

2

2

2

2

W

W

W

W

W

W

eries

http://www.microdc.cn

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

Page 2 of 3

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

COMMON

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

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

%

Operating temperature

-40

85

℃

Storage temperature

-55

125

Lead temperature

1.5mm from case for 10 seconds

300

Temp.rise at full load

15

No-load power consumption

0.1

W

Case material

Plastic(UL94-V0)

Short circuit protection

Continuous

Cooling

Free air convection

MTBF

1000

K hours

Weight

5.8

g

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

Parameter

Test conditions

Min

Typ.

Max

Unit

Main output voltage accuracy

Refer to recommended circuit

±1

±3

%

Vice output voltage accuracy

Refer to recommended circuit

±3

±5

%

Load regulation

10% to 100% full load

±0.5

±1 *

%

Line regulat ion

Input voltage from low to high

±0.2

±0.5

%

Temperature drift (Vout)

Refer to recommended circuit

±0.03

%/℃

Ripple & Noise**

20MHz Bandwidth

50

100

mVp-p

Switching frequency

100% load, input voltage range

300

KHz

*Dual output models unbalanced load: ±5%.

** Test ripple and noise by "parallel cable" method. See detailed operation instructions at Testing of Power

Converter section, application notes.

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

EXTERNAL

EXTERNAL

EXTERNAL

EXTERNAL CAPACITOR

CAPACITOR

CAPACITOR

CAPACITOR TABLE

TABLE

TABLE

TABLE (TABLE

(TABLE

(TABLE

(TABLE 1)

1)

1)

1)

V

V

V

Vout

out

out

out

2W

2W

2W

2W ::::C

C

C

Cout

out

out

out

1W

1W

1W

1W ::::Cout

Cout

Cout

Cout

(VDC)

(μF)

(μF)

5

680

470

9

470

330

12

330

220

24

220

100

When

When

When

When the

the

the

the environment

environment

environment

environment temperature

temperature

temperature

temperature is

is

is

is higher

higher

higher

higher than

than

than

than 71

71

71

71°°°°C,

C,

C,

C, the

the

the

the product

product

product

product

output

output

output

output power

power

power

power should

should

should

should be

be

be

be less

less

less

less th

th

th

tha

a

a

an

n

n

n 60%

60%

60%

60% of

of

of

of the

the

the

the rated

rated

rated

rated power.

power.

power.

power.

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.

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

NOTE

NOTE

NOTE

NOTE

NOTE

NOTE

NOTE

1)

1)

1)

1) CS

CS

CS

CS Pin

Pin

Pin

Pin

By connecting a

low ESR capacitor between

this

terminal and

the pin-7(Figure

1),

the output

ripple and noise may be further improved. Generally, the capacitance is no greater than 47uF.

2)

2)

2)

2) Requirement

Requirement

Requirement

Requirement on

on

on

on Output

Output

Output

Output Load

Load

Load

Load

To

ensure

this module

can

operate

efficiently

and

reliably,

During

operation,

the minimum

output

load

is

not

less

than

10%

of

the

full

load,

If

the

actual

load

is

less

than

the

specified

minimum

load,

the

output

ripple may

increase

sharply.

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.

3)

3)

3)

3) Recommended

Recommended

Recommended

Recommended Circuit

Circuit

Circuit

Circuit

If you want to

further decrease

the

input/output ripple, you can

increase capacitance properly

or choose capacitors with low ESR (Figure 1).

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)

Cin:

5V & 12V

100μF

24V & 48V

10μF-47μF

Lin:

10μH-120μH

Cout: 100μF(TYP)

4)

4)

4)

4) Input

Input

Input

Input current

current

current

current

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

exceed

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

5)

5)

5)

5) 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

TEMPERATURE

TEMPERATURE

TEMPERATURE

TEMPERATURE

TEMPERATURE

TEMPERATURE

CURVE

CURVE

CURVE

CURVE

CURVE

CURVE

CURVE