WRE-YD-4W&WRF-YD-4W

WRE-YD-4W&WRF-YD-4W

WRE-YD-4W&WRF-YD-4W

WRE-YD-4W&WRF-YD-4W

WRE-YD-4W&WRF-YD-4W

WRE-YD-4W&WRF-YD-4W

WRE-YD-4W&WRF-YD-4W

Series

http://www.microdc.cn

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

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RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

Output Graph

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

no

no

no less

less

less

less than

than

than

than 10%

10%

10%

10% load

load

load

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 WRE_YD-4W&WRE_YD-4W 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 100μF-47μF

Cout: 10μF/100mA

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. Input current of

power supply should afford the startup current of this kind of DC/DC module

(See figure 2).

General:Ip≤1.4*Iin-max

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

Input

Input

Input

Input

Input

Input

Input

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Voltage range

12VDC, 9~18VDC

24VDC, 18~36VDC

48VDC, 36~72VDC

Filter

p(Pi) Network

Isolation

Isolation

Isolation

Isolation

Isolation

Isolation

Isolation

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Rated voltage (60 sec)

3000VDC

Resistance

> 1000MOhm

Capacitance

120pF, typ.

Environmental

Environmental

Environmental

Environmental

Environmental

Environmental

Environmental

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Operating temperature (ambient)

-40°C ... +85°C

Storage temperature

-55°C ... +125°C

Case temperature

+100°C, max.

Derating

None required

Humidity (non-condensing)

Up to 90%

Cooling

Free-air Convection

MTBF: > 1,036,000 hrs (MIL-HDBK-217F, Ground Benign, t=+25°C)

Specifications are subject to change without notification

TYPICAL

TYPICAL

TYPICAL

TYPICAL

TYPICAL

TYPICAL

TYPICAL

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

CHARACTERISTICS

Temperature Derating Graph

General

General

General

General

General

General

General

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Efficiency

73% to 81%

Switching Frequency

250KHz, typ. 100% load

Output

Output

Output

Output

Output

Output

Output

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Voltage accuracy

±1%, max.

Voltage balance (Dual Output)

±1%

Ripple & noise (at 20MHz BW)

60mVp-p, max.

Short circuit protection

Continuous

Short circuit restart

Automatic

Line voltage regulation

±0.5%, max.

Load voltage regulation

±0.5%, max.

Temperature coefficient

±0.02%/°C, typ.

Physical

Physical

Physical

Physical

Physical

Physical

Physical

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Specifications

Dimensions

31.75x20.32x10.16mm

1.25x0.8x0.4inches

Weight

19g

Case material

Nickel-Coated Copper