WRA2412YD-2W Просмотр технического описания (PDF) - Microdc power Technology Co., Ltd

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WRA2412YD-2W

2W, WIDE INPUT, ISOLATED & REGULATED DUAL/SINGLE OUTPUT DC-DC CONVERTER

Microdc power Technology Co., Ltd 

COMMON SPECIFICATIONS

WRA-YD-2W&WRB-YD-2W Series

TYPICAL CHARECTERISTICS

Parameter

Test conditions

Min. Typ. Max Units

Output power

See above products program

0.2

2

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

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.

APPLICATION NOTE

RECOMMENDED CIRCUIT

1) Requirement on output 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) Recommended Circuit

All the WRA_YD-2W & WRB_YD-2W series have been tested according to the following

recommended testing circuit before leaving factory (Figure 1). This series should be tested under load.

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: 12V 100µF

24V 10µF~47µF

Cout: 10µF/100mA

3) Input 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) No parallel connection or plug and play

http://www.microdc.cn Technical Enquiries-Email:tech@microdc.cn Tel:0086-20-86000646 Page 2 of 3

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