The Fifth Generation, Ultra Small Size, Isolated DC-DC Converter

1.5Watt BTA Series

12

DC-DC Converter

BDD20081

203

7-5 Input Circuit Protection Function

Fuse is built in at input in order to protect circuit at secondary side when overcurrent flows to input by some

abnormalities.

Rating current and fusing current of the Built-in fuse is as below table. To assure fusing at abnormality, current

capacity of power supply should be more than fusing current which is stated in below table.

Model

Rating Current

Fusing Current

BTA05

1.25A

Above 2.5A

BTA12

0.75A

Above 1.5A

BTA24

0.75A

Above 1.5A

BTA48

0.75A

Above 1.5A

8. An example method to prevent inverse connection of input power supply.

This product will be damaged when input polarity is connected reversely. Please add protection circuit when

connection may be reversed.

Below diagram is an example of using fuse and diode.

7

+Vout

5

-

Vout

Load

C2

C3

1

3

-

Vin

+Vin

+

C1

+

D1

+

Vin

FUSE

BTA-S Series

2

ON/OFF