www.micropowerdirect.com

Typical Connection

For applications that require meeting EMC standards,the diagram above

illustrates a typical connection of the MI600xERW series. The units

do not require external components to operate as specified.Some notes

on this diagram (starting with the input circuit) are:

1. An external fuse should be used in all power module applications.

The recommended fuse is shown in the model chart on page 2.

2. To protect against a surge, an external MOV is recommended on the

input. A suggested value is given in the table at right.

3. To protect against voltage spikes, it is recommended that a TVS be

used on the input. A suggested value is given in the table at right.

electrolytic capacitor. Care must be taken in choosing this capacitor

not to exceed the capacitive load specification for the unit. Voltage

derating of capacitors should be 60% or greater.

5. Recommended values for components are:

Component

MOV

---

S14K35

S14K60

---

56 µH

56 µH

TVS

SMCJ28A

SMCJ48A

SMCJ90A

680 µF/25V

330 µF/50V

330 µF/100V

1µF/50V

1µF/50V

1µF/100V

4.7 µH

4.7 µH

4.7 µH

1nF/2 kV

1nF/2 kV

1nF/2 kV

1nF/2 kV

1nF/2 kV

1nF/2 kV

10 µF

10 µF

10 µF

10 µF

10 µF

10 µF

6. The drawings below show typical board layouts for the EMC/

EMI circuit shown above (one for single output models and

one for dual output units).

7. In many applications simply adding input/output

capacitors will enhance the input surge protection

and reduce output ripple sufficiently. The value of

the input capacitor can range from 10 µF to 330 µF,

depending on the needs of the application. The output

capacitor would typically be 10 µF.