WRA-ZD-1W5&WRB-ZD-1W5

WRA-ZD-1W5&WRB-ZD-1W5

WRA-ZD-1W5&WRB-ZD-1W5

WRA-ZD-1W5&WRB-ZD-1W5

WRA-ZD-1W5&WRB-ZD-1W5

WRA-ZD-1W5&WRB-ZD-1W5

WRA-ZD-1W5&WRB-ZD-1W5

eries

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

Parameter

Test conditions

Min.

Typ.

Max

Units

Output power

See above products program

0.15

1.5

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

±2*

%

Line regulation

Input voltage from low to high

±0.2

±0.75

%

Temperature drift

Refer to recommended circuit

±0.03

%/℃

Ripple**

20MHz Bandwidth

20

50

mVp-p

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

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

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.

2) Recommended Circuit

All the WRA_ZD-1W5&WRB_ZD-1W5 Series have been tested according to the following

recommended testing circuit before leaving factory. (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. For every channel of output, provided the safe and reliable operation is ensured, the greatest

capacitance of its filter capacitor sees (Table 1).If you want to use the products in high EMI, please

choose our metal packaged products (WRA_ZD-1W5 & WRB_ZD-1W5). General:

Cin:

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. (See 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

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

CHARECTERISTICS

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

RECOMMENDED

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT

CIRCUIT