MLX90401

Brushless DC Motor Controller

Table of content

1 Pin configuration ..........................................................................................................1

2 General description ......................................................................................................1

3 Glossary of terms .........................................................................................................3

4 Pin definitions and description....................................................................................3

5 Absolute maximum ratings ..........................................................................................4

6 MLX90401 electrical specifications .............................................................................4

7 General description ......................................................................................................5

7.1 Overview .............................................................................................................................................. 5

7.2 Block diagram ...................................................................................................................................... 6

7.3 Commutation decoding and output control logic.................................................................................. 7

7.4 Oscillator .............................................................................................................................................. 7

7.5 Disable ................................................................................................................................................. 7

7.6 Pulse width modulation ........................................................................................................................ 8

7.7 Drive outputs ........................................................................................................................................ 8

7.8 Undervoltage lockout ........................................................................................................................... 9

7.9 Logic table ............................................................................................................................................ 9

8 Application information..............................................................................................10

8.1 Evaluation Board................................................................................................................................ 10

8.2 Typical application.............................................................................................................................. 10

9 FAQ ..............................................................................................................................11

9.1 Bootstrap capacitor selection............................................................................................................. 11

9.2 Motor Noise........................................................................................................................................ 11

10 Reliability Information ..............................................................................................11

11 ESD Precautions .......................................................................................................12

12 FAQ ............................................................................................................................12

13 Package Information.................................................................................................12

14 Disclaimer..................................................................................................................13

3901090401

Page 2 of 13

Data sheet

Rev 005

Oct/05