WRD-YD-3W

WRD-YD-3W

WRD-YD-3W

WRD-YD-3W

WRD-YD-3W

WRD-YD-3W

WRD-YD-3W

Series

http://www.microdc.cn

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

Page 2 of 3

ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

Item

Item

Item

Item

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 voltage

Tested for 1 minute and 1mA max

1500

VDC

Isolation resistance

Test at 500VDC

1000

MΩ

Isolation capacitance

Input/Output, 100KHz/1V

100

pF

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

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 WRD-YD-3W Series have been

tested

according

to

the

following

recommended testing circuit before

leaving factory. This series should be tested under 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

should

not

be

too high,

or may

cause

start-up

problem.

If

you want

to

use

the

products

in

high

EMI,

please choose our metal packaged

products (WRD_YD-3W). 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

22µF/10µF

Cout: 10µF/100mA

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 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

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

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

EXTERNAL CAPACITOR TABLE (TABLE 1)

Output

Output

Output

Output

Output

Output

Output

External

External

External

External

External

External

Capacitor

Capacitor

Capacitor

Capacitor

Capacitor

Capacitor

Table

Table

Table

Table

Table

Table

(Table

(Table

(Table

(Table

(Table

(Table

1)

1)

1)

1)

1)

1)

1)

Vout(VDC)

Vout(VDC)

Vout(VDC)

Vout(VDC)

Cout(uF)

Cout(uF)

Cout(uF)

Cout(uF)

5

680

9

470

12

330

15

220

24

100

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

Item

Item

Item

Item

Test

Test

Test

Test Conditions

Conditions

Conditions

Conditions

Min.

Min.

Min.

Min.

Typ.

Typ.

Typ.

Typ.

Max.

Max.

Max.

Max.

Units

Units

Units

Units

Output power

Refer to product program

0.3

3

W

Main output voltage accuracy

Refer to recommended circuit

±1

±3

%

Vice-output voltage accuracy

Refer to recommended circuit

±3

±5

Load regulation

From 10% to 100% load

±0.5

±1*

Line regulation

Input voltage from low to high

±0.2

±0.5

Temperature drift (Vout)

Refer to recommended circuit

±0.03

%/℃

Ripple**

20MHz Bandwidth

20

50

mVp-p

Noise**

20MHz Bandwidth

75

150

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.