用户手册 — STMicroelectronics Stepper motor driver mounting the L6474 in high power PowerSO package EVAL6474PD

目录

• Table 1. Device summary

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• 1 Block diagram

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  • Figure 1. Block diagram

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• 2 Electrical data

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  • 2.1 Absolute maximum ratings

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    • Table 2. Absolute maximum ratings

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  • 2.2 Recommended operating conditions

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    • Table 3. Recommended operating conditions

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  • 2.3 Thermal data

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    • Table 4. Thermal data

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• 3 Electrical characteristics

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  • Table 5. Electrical characteristics

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• 4 Pin connection

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  • Figure 2. HTSSOP28 pin connection (top view)

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  • Figure 3. POWERSO36 pin connection (top view)

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  • 4.1 Pin list

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    • Table 6. Pin description

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• 5 Typical applications

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  • Table 7. Typical application values

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  • Figure 4. Bipolar stepper motor control application using L6474

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• 6 Functional description

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  • 6.1 Device power-up

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  • 6.2 Logic I/O

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  • 6.3 Charge pump

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    • Figure 5. Charge pump circuitry

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  • 6.4 Microstepping

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    • Figure 6. Normal mode and microstepping (16 microsteps)

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  • 6.5 Absolute position counter

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  • 6.6 Step sequence control

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  • 6.7 Enable and disable commands

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  • 6.8 Internal oscillator and oscillator driver

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    • 6.8.1 Internal oscillator

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    • 6.8.2 External clock source

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      • Table 8. CL values according to external oscillator frequency

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      • Figure 7. OSCIN and OSCOUT pin configurations

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  • 6.9 Overcurrent detection

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  • 6.10 Undervoltage lock-out (UVLO)

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  • 6.11 Thermal warning and thermal shutdown

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  • 6.12 Reset and standby

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  • 6.13 Programmable DMOS slew-rate, dead-time and blanking-time

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  • 6.14 Integrated analog to digital converter

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  • 6.15 Internal voltage regulator

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    • Figure 8. Internal 3 V linear regulator

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  • 6.16 SYNC pin

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  • 6.17 FLAG pin

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• 7 Phase current control

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  • 7.1 Peak current control

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    • Figure 9. Peak current control

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  • 7.2 Auto-adjusted decay mode

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    • Figure 10. Adaptive decay - fast decay tuning

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    • Figure 11. Adaptive decay - switch from normal to slow+fast decay mode and vice versa

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  • 7.3 Auto-adjusted fast decay during the falling steps

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    • Figure 12. Fast decay tuning during the falling steps

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  • 7.4 Torque regulation (output current amplitude regulation)

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• 8 Serial interface

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  • Figure 13. SPI timings diagram

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  • Figure 14. Daisy-chain configuration

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• 9 Programming manual

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  • 9.1 Registers and flags description

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    • Table 9. Register map

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    • 9.1.1 ABS_POS

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    • 9.1.2 EL_POS

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      • Table 10. EL_POS register

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    • 9.1.3 MARK

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    • 9.1.4 TVAL

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      • Table 11. Torque regulation register

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    • 9.1.5 T_FAST

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      • Table 12. T_FAST register

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      • Table 13. Maximum fast decay times

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    • 9.1.6 TON_MIN

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      • Table 14. Minimum ON time

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    • 9.1.7 TOFF_MIN

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      • Table 15. Minimum OFF time

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    • 9.1.8 ADC_OUT

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      • Table 16. ADC_OUT value and torque regulation feature

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    • 9.1.9 OCD_TH

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      • Table 17. Overcurrent detection threshold

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    • 9.1.10 STEP_MODE

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      • Table 18. STEP_MODE register

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      • Table 19. Step mode selection

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      • Table 20. SYNC signal source

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    • 9.1.11 ALARM_EN

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      • Table 21. ALARM_EN register

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    • 9.1.12 CONFIG

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      • Table 22. CONFIG register

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      • Table 23. Oscillator management

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      • Table 24. Overcurrent event

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      • Table 25. Programmable power bridge output slew-rate values

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      • Table 26. External torque regulation enable

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      • Table 27. OFF time

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    • 9.1.13 STATUS

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      • Table 28. STATUS register

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      • Table 29. STATUS register DIR bit

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  • 9.2 Application commands

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    • Table 30. Application commands

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    • 9.2.1 Command management

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      • Figure 15. Command with three-byte argument

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      • Figure 16. Command with three-byte response

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      • Figure 17. Command response aborted

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    • 9.2.2 Nop

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      • Table 31. Nop command structure

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    • 9.2.3 SetParam (PARAM, VALUE)

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      • Table 32. SetParam command structure

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    • 9.2.4 GetParam (PARAM)

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      • Table 33. GetParam command structure

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    • 9.2.5 Enable

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      • Table 34. HardStop command structure

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    • 9.2.6 Disable

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      • Table 35. Disable command structure

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    • 9.2.7 GetStatus

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      • Table 36. GetStatus command structure

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• 10 Package mechanical data

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  • Table 37. HTSSOP28 mechanical data

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  • Figure 18. HTSSOP28 mechanical data

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  • Table 38. POWERSO36 mechanical data

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  • Figure 19. POWERSO36 drawings

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• 11 Revision history

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  • Table 39. Document revision history

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