Ficha De Dados (EVAL6474PD)índice analíticoTable 1. Device summary11 Block diagram7Figure 1. Block diagram72 Electrical data82.1 Absolute maximum ratings8Table 2. Absolute maximum ratings82.2 Recommended operating conditions9Table 3. Recommended operating conditions92.3 Thermal data9Table 4. Thermal data93 Electrical characteristics10Table 5. Electrical characteristics104 Pin connection15Figure 2. HTSSOP28 pin connection (top view)15Figure 3. POWERSO36 pin connection (top view)154.1 Pin list16Table 6. Pin description165 Typical applications18Table 7. Typical application values18Figure 4. Bipolar stepper motor control application using L6474186 Functional description196.1 Device power-up196.2 Logic I/O196.3 Charge pump19Figure 5. Charge pump circuitry206.4 Microstepping20Figure 6. Normal mode and microstepping (16 microsteps)206.5 Absolute position counter216.6 Step sequence control216.7 Enable and disable commands216.8 Internal oscillator and oscillator driver226.8.1 Internal oscillator226.8.2 External clock source22Table 8. CL values according to external oscillator frequency22Figure 7. OSCIN and OSCOUT pin configurations236.9 Overcurrent detection236.10 Undervoltage lock-out (UVLO)246.11 Thermal warning and thermal shutdown246.12 Reset and standby246.13 Programmable DMOS slew-rate, dead-time and blanking-time256.14 Integrated analog to digital converter256.15 Internal voltage regulator25Figure 8. Internal 3 V linear regulator256.16 SYNC pin266.17 FLAG pin267 Phase current control277.1 Peak current control27Figure 9. Peak current control277.2 Auto-adjusted decay mode28Figure 10. Adaptive decay - fast decay tuning28Figure 11. Adaptive decay - switch from normal to slow+fast decay mode and vice versa297.3 Auto-adjusted fast decay during the falling steps29Figure 12. Fast decay tuning during the falling steps307.4 Torque regulation (output current amplitude regulation)308 Serial interface31Figure 13. SPI timings diagram31Figure 14. Daisy-chain configuration329 Programming manual339.1 Registers and flags description33Table 9. Register map339.1.1 ABS_POS349.1.2 EL_POS34Table 10. EL_POS register349.1.3 MARK349.1.4 TVAL34Table 11. Torque regulation register359.1.5 T_FAST35Table 12. T_FAST register35Table 13. Maximum fast decay times359.1.6 TON_MIN35Table 14. Minimum ON time369.1.7 TOFF_MIN36Table 15. Minimum OFF time369.1.8 ADC_OUT37Table 16. ADC_OUT value and torque regulation feature379.1.9 OCD_TH37Table 17. Overcurrent detection threshold379.1.10 STEP_MODE38Table 18. STEP_MODE register38Table 19. Step mode selection38Table 20. SYNC signal source399.1.11 ALARM_EN40Table 21. ALARM_EN register409.1.12 CONFIG40Table 22. CONFIG register40Table 23. Oscillator management41Table 24. Overcurrent event41Table 25. Programmable power bridge output slew-rate values42Table 26. External torque regulation enable42Table 27. OFF time429.1.13 STATUS42Table 28. STATUS register42Table 29. STATUS register DIR bit439.2 Application commands43Table 30. Application commands439.2.1 Command management43Figure 15. Command with three-byte argument44Figure 16. Command with three-byte response44Figure 17. Command response aborted449.2.2 Nop44Table 31. Nop command structure449.2.3 SetParam (PARAM, VALUE)45Table 32. SetParam command structure459.2.4 GetParam (PARAM)45Table 33. GetParam command structure459.2.5 Enable46Table 34. HardStop command structure469.2.6 Disable46Table 35. Disable command structure469.2.7 GetStatus46Table 36. GetStatus command structure4610 Package mechanical data47Table 37. HTSSOP28 mechanical data47Figure 18. HTSSOP28 mechanical data48Table 38. POWERSO36 mechanical data49Figure 19. POWERSO36 drawings5011 Revision history51Table 39. Document revision history51Tamanho: 700 KBPáginas: 52Language: EnglishAbrir o manual