AMIS-30624 Datasheet, PDF (3/56 Pages) AMI SEMICONDUCTOR – I2C Microstepping Motordriver

AMIS-30624 I²C Microstepping Motordriver
Data Sheet
6.0 Table of Contents
1.0 General Description.............................................................................................................................................................................. 1
2.0 Product Features .................................................................................................................................................................................. 1
3.0 Applications .......................................................................................................................................................................................... 2
4.0 Ordering Information............................................................................................................................................................................. 2
5.0 Quick Reference Data .......................................................................................................................................................................... 2
6.0 Content................................................................................................................................................................................................. 3
7.0 Block Diagram ...................................................................................................................................................................................... 5
8.0 Pin-out .................................................................................................................................................................................................. 6
9.0 Package Thermal Resistance............................................................................................................................................................... 7
9.1 SOIC-20............................................................................................................................................................................................ 7
9.2 NQFP-32........................................................................................................................................................................................... 7
10.0 DC Parameters................................................................................................................................................................................... 8
11.0 AC Parameters ................................................................................................................................................................................. 10
12.0 Typical Application............................................................................................................................................................................ 12
13.0 Positioning Parameters .................................................................................................................................................................... 12
13.1 Stepping Modes ............................................................................................................................................................................ 12
13.2 Maximum Velocity......................................................................................................................................................................... 13
13.3 Minimum Velocity.......................................................................................................................................................................... 13
13.4 Acceleration and Deceleration ...................................................................................................................................................... 14
13.5 Positioning .................................................................................................................................................................................... 14
13.5.1. Position Ranges .................................................................................................................................................................... 15
13.5.2. Secure Position ..................................................................................................................................................................... 15
13.5.3. Shaft...................................................................................................................................................................................... 15
14.0 Structural Description ....................................................................................................................................................................... 16
14.1 Stepper Motordriver ...................................................................................................................................................................... 16
14.2 Control Logic (Position Controller and Main Control) .................................................................................................................... 16
14.3 Motion Detection ........................................................................................................................................................................... 16
14.4 Miscellaneous ............................................................................................................................................................................... 16
15.0 Functional Description ...................................................................................................................................................................... 17
15.1 Position Controller......................................................................................................................................................................... 17
15.1.1. Positioning and Motion Control.............................................................................................................................................. 17
15.1.2. Dual Positioning .................................................................................................................................................................... 19
15.1.3. Position Periodicity ................................................................................................................................................................ 19
15.1.4. Hardwired Address HW......................................................................................................................................................... 20
15.1.5. External Switch SWI.............................................................................................................................................................. 22
15.2 Main Control and Register, OTP Memory + ROM......................................................................................................................... 23
15.2.1. Power-up Phase.................................................................................................................................................................... 23
15.2.2. Reset State............................................................................................................................................................................ 23
15.2.3. Soft Stop ............................................................................................................................................................................... 23
15.2.4. Thermal Shutdown Mode ...................................................................................................................................................... 23
15.2.5. Temperature Management .................................................................................................................................................... 24
15.2.6. Battery Under-voltage Management...................................................................................................................................... 25
15.2.7. OTP register .......................................................................................................................................................................... 25
15.2.8. RAM Registers ...................................................................................................................................................................... 29
15.2.9. Flags Table............................................................................................................................................................................ 30
15.2.10. Priority Encoder................................................................................................................................................................... 31
15.3 Motordriver.................................................................................................................................................................................... 33
15.3.1. Current waveforms in the coils .............................................................................................................................................. 33
15.3.2. PWM Regulation ................................................................................................................................................................... 34
15.3.3. PWM Jitter............................................................................................................................................................................. 34
15.3.4. Motor Starting Phase............................................................................................................................................................. 34
15.3.5. Motor Stopping Phase........................................................................................................................................................... 34
15.3.6. Charge Pump Monitoring ...................................................................................................................................................... 35
15.3.7. Electrical Defect on Coils, Detection and Confirmation ......................................................................................................... 35
15.3.8. Motor Shutdown Mode .......................................................................................................................................................... 36
15.4 Motion Detection ........................................................................................................................................................................... 37
AMI Semiconductor – Apr. 2007, Rev 3.1, M-20664-003
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