Document Number: 002-08322 Rev. *A

Page 2 of 23

MB39A112EVB-01

Contents

Evaluation Board Specifications ................................................................................................................ 1

1. Terminal Description ..................................................................... 3

2. Switch Description .................................................................................................................................. 3

3. Setup and Checkup ................................................................................................................................. 3

3.1 Setup.................................................................................................................................................. 3

3.2 Checkup............................................................................................................................................. 3

4. Component Layout .................................................................................................................................. 4

5. Connection Diagram................................................................................................................................ 6

6. Parts List .................................................................................................................................................. 7

7. Initial Settings ........................................................................................................................................ 10

7.1 Output voltage.................................................................................................................................. 10

7.2 Oscillation frequency........................................................................................................................ 10

7.3 Soft-start time................................................................................................................................... 10

7.4 Short-circuit detection time .............................................................................................................. 10

8. Reference Data....................................................................................................................................... 11

8.1 Conversion efficiency vs. Input voltage............................................................................................ 11

8.2 Load Reguration (VIN

 12 V) ........................................................................................................ 12

8.3 Line regulation ................................................................................................................................. 13

8.4 Soft-start operation waveforms ........................................................................................................ 14

9. Component Selection Methods ............................................................................................................ 15

9.1 CH1 1.2 V output ............................................................................................................................. 16

9.2 CH2 3.3 V output ............................................................................................................................. 18

9.3 CH3 5 V output ................................................................................................................................ 20

10. Ordering Information ........................................................................................................................... 21

Document History Page ............................................................................................................................ 22

Sales, Solutions, and Legal Information ................................................................................................. 23