WRE-YD-3W&WRF-YD-3W

WRE-YD-3W&WRF-YD-3W

WRE-YD-3W&WRF-YD-3W

WRE-YD-3W&WRF-YD-3W

WRE-YD-3W&WRF-YD-3W

WRE-YD-3W&WRF-YD-3W

WRE-YD-3W&WRF-YD-3W

Series

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

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

See above products program

0.3

3

W

Positive voltage accuracy

Refer to recommended circuit

±1

±3

%

Negative voltage accuracy

Refer to recommended circuit

±3

±5

%

Load regulation

From 10% to 100% load

±0.5

±1*

%

Line regulation(at full load)

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.

*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 WRE_YD-3W & WRF_YD-3W 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 Input

Voltage capacitance of its filter capacitor sees (Table 1).

General: Cin:

12V

100µF

24V&48V

10µF-47µF

Cout: 10µF/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

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)

Single

Single

Single

Single Vout

Vout

Vout

Vout

(VDC)

(VDC)

(VDC)

(VDC)

Cout

Cout

Cout

Cout

(uF)

(uF)

(uF)

(uF)

Dual

Dual

Dual

Dual Vout

Vout

Vout

Vout

(VDC)

(VDC)

(VDC)

(VDC)

Cout

Cout

Cout

Cout

(uF)

(uF)

(uF)

(uF)

5

1000

±5

680

9

680

±9

470

12

470

±12

330

15

330

±15

220

24

220

-

-