WRA-YMT-3W&WRB-YMT-3W

WRA-YMT-3W&WRB-YMT-3W

WRA-YMT-3W&WRB-YMT-3W

WRA-YMT-3W&WRB-YMT-3W

WRA-YMT-3W&WRB-YMT-3W

WRA-YMT-3W&WRB-YMT-3W

WRA-YMT-3W&WRB-YMT-3W

eries

http://www.microdc.cn

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

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ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

ISOLATION

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

Parameter

Test conditions

Min.

Typ.

Max

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

1000

pF

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

APPLICATION

NOTE

NOTE

NOTE

NOTE

NOTE

NOTE

NOTE

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.

Recommended

Recommended

Recommended

Recommended Circuit

Circuit

Circuit

Circuit

All the WRA_YMT-3W & WRB_YMT-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 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

100µF

24V&48V

10µF~47µF

Cout: 10µF/100mA

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

flash startup current of this kind of DC/DC module (Figure 2),

General:

Ip ≤1.6*Iin-max(Vin=5V)

Ip ≤1.4*Iin-max(Vin=12V/24V/48V)

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

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

OUTPUT

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

SPECIFICATIONS

Parameter

Test conditions

Min.

Typ.

Max

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

Input voltage from low to high

±0.2

±0.5

%

Temperature Drift (Vout)

Refer to recommended circuit

±0.03

%/℃

Output ripple& noise**

20MHz Bandwidth

35

100

mVp-p

Switching frequency

100% load, nominal input voltage

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.