Datasheet TB67S531FTG (Toshiba) - 10
| Manufacturer | Toshiba |
| Description | BiCD Constant-Current Two-Phase Bipolar Stepping Motor Driver IC in 32-VQFN (5x5) package |
| Pages / Page | 38 / 10 — 6.2.2.3. Quarter-step resolution. Figure 6.3 Quarter-step resolution. … |
| File Format / Size | PDF / 3.0 Mb |
| Document Language | English |
6.2.2.3. Quarter-step resolution. Figure 6.3 Quarter-step resolution. 6.3. Torque function. Table 6.3 Torque function
Model Line for this Datasheet
Text Version of Document
TB67S531FTG
6.2.2.3. Quarter-step resolution
100% 71% IO UT_A 38% 0% -38% -71% -100% 100% 71% IO 38% UT_B 0% -38% -71% -100% H PHA SE_A L IN_A1 H L IN_A2 H L H PHA SE_B L IN_B1 H L IN_B2 H L
Figure 6.3 Quarter-step resolution
Note: Timing charts may be simplified for explanatory purpose.
6.3. Torque function
TRQ pins set the torque of the motor.
Table 6.3 Torque function TRQ pin input Function
L Torque setting: 100 % H Torque setting: 50 % ©2026 10 2026-04-07 Toshiba Electronic Devices & Storage Corporation Rev. 1.0.A Document Outline 1. Description 2. Features 3. Block Diagram 4. Pin Assignments 5. Pin Description 5.1. Pin Function Description TB67S531FTG 5.2. Input and Output Equivalent Circuit 6. Functional Description: TB67S531FTG 6.1. SLEEP_X function 6.2. Phase input control mode 6.2.1. Functions of IN_A1, IN_A2, IN_B1, IN_B2, PHASE_A, PHASE_B 6.2.2. Sequence by each drive mode in phase input control mode 6.2.2.1. Full-step resolution 6.2.2.2. Half-step resolution 6.2.2.3. Quarter-step resolution 6.3. Torque function 6.4. Selectable Mixed Decay Function 6.4.1. Mixed Decay Waveform (Current Waveform) 6.4.2. Each Time of Constant Current PWM Operation 6.4.3. Mixed Decay Current Waveform 6.4.3.1. When the set current value is increased 6.4.3.2. When the Charge period is more than 1 fCHOP cycle 6.4.3.3. When the set current value is decreased 6.5. ADMD (Advanced Dynamic Mixed Decay) Constant Current Control 6.6. ADMD Current Waveform 6.6.1. When the next current value is increased 6.6.2. When Charge period ≥ 1 fCHOP cycle 6.6.3. When the next current value is decreased 6.6.4. Fast period > 1 fCHOP cycle (The motor current does not reach the ADMD threshold during 1 fCHOP cycle.) 6.7. LO (Error detection flag output) function 6.8. Output Transistor Function mode (Advanced Dynamic Mixed Decay) 6.9. Set current value (IOUT) 6.10. Chopping frequency (fCHOP) 6.11. Power consumption of the IC 6.11.1. Power consumption of the power transistor 6.11.2. Power consumption of logic and IM systems 6.11.3. Power consumption 6.12. Detection Function 6.12.1. Thermal shutdown detection (This function is a latch type that maintains the operation at the time of detection.) 6.12.1.1. When over temperature is detected: 6.12.2. Over-current detection (This function is a latch type that maintains the operation at the time of detection.) 6.12.2.1. When over-current is detected in the lower DMOS of H-bridge by the short-circuiting to the power supply 6.12.2.2. When over-current is detected in the upper DMOS of H-bridge by the short-circuiting to the ground: 7. Absolute Maximum Ratings (Ta = 25 C) 8. Operating Ranges (Ta = -40 to 85 C) 9. Electrical Characteristics 9.1. Electrical Characteristics 1 (Ta = 25 C, VM = 24 V, unless otherwise specified) 9.2. Electrical Characteristics 2 (Ta = 25 C, VM = 24 V, unless otherwise specified) 9.3. AC Electrical Characteristics (Ta = 25 C, VM = 24 V) 9.3.1. AC Electrical Characteristics Timing Chart 10. Application Circuit Example 11. Package Information 11.1. Package Dimensions 12. IC Usage Considerations 12.1. Notes on Handling of ICs 12.2. Points to Remember on Handling of Ics RESTRICTIONS ON PRODUCT USE
6.2.2.3. Quarter-step resolution
100% 71% IO UT_A 38% 0% -38% -71% -100% 100% 71% IO 38% UT_B 0% -38% -71% -100% H PHA SE_A L IN_A1 H L IN_A2 H L H PHA SE_B L IN_B1 H L IN_B2 H L
Figure 6.3 Quarter-step resolution
Note: Timing charts may be simplified for explanatory purpose.
6.3. Torque function
TRQ pins set the torque of the motor.
Table 6.3 Torque function TRQ pin input Function
L Torque setting: 100 % H Torque setting: 50 % ©2026 10 2026-04-07 Toshiba Electronic Devices & Storage Corporation Rev. 1.0.A Document Outline 1. Description 2. Features 3. Block Diagram 4. Pin Assignments 5. Pin Description 5.1. Pin Function Description TB67S531FTG 5.2. Input and Output Equivalent Circuit 6. Functional Description: TB67S531FTG 6.1. SLEEP_X function 6.2. Phase input control mode 6.2.1. Functions of IN_A1, IN_A2, IN_B1, IN_B2, PHASE_A, PHASE_B 6.2.2. Sequence by each drive mode in phase input control mode 6.2.2.1. Full-step resolution 6.2.2.2. Half-step resolution 6.2.2.3. Quarter-step resolution 6.3. Torque function 6.4. Selectable Mixed Decay Function 6.4.1. Mixed Decay Waveform (Current Waveform) 6.4.2. Each Time of Constant Current PWM Operation 6.4.3. Mixed Decay Current Waveform 6.4.3.1. When the set current value is increased 6.4.3.2. When the Charge period is more than 1 fCHOP cycle 6.4.3.3. When the set current value is decreased 6.5. ADMD (Advanced Dynamic Mixed Decay) Constant Current Control 6.6. ADMD Current Waveform 6.6.1. When the next current value is increased 6.6.2. When Charge period ≥ 1 fCHOP cycle 6.6.3. When the next current value is decreased 6.6.4. Fast period > 1 fCHOP cycle (The motor current does not reach the ADMD threshold during 1 fCHOP cycle.) 6.7. LO (Error detection flag output) function 6.8. Output Transistor Function mode (Advanced Dynamic Mixed Decay) 6.9. Set current value (IOUT) 6.10. Chopping frequency (fCHOP) 6.11. Power consumption of the IC 6.11.1. Power consumption of the power transistor 6.11.2. Power consumption of logic and IM systems 6.11.3. Power consumption 6.12. Detection Function 6.12.1. Thermal shutdown detection (This function is a latch type that maintains the operation at the time of detection.) 6.12.1.1. When over temperature is detected: 6.12.2. Over-current detection (This function is a latch type that maintains the operation at the time of detection.) 6.12.2.1. When over-current is detected in the lower DMOS of H-bridge by the short-circuiting to the power supply 6.12.2.2. When over-current is detected in the upper DMOS of H-bridge by the short-circuiting to the ground: 7. Absolute Maximum Ratings (Ta = 25 C) 8. Operating Ranges (Ta = -40 to 85 C) 9. Electrical Characteristics 9.1. Electrical Characteristics 1 (Ta = 25 C, VM = 24 V, unless otherwise specified) 9.2. Electrical Characteristics 2 (Ta = 25 C, VM = 24 V, unless otherwise specified) 9.3. AC Electrical Characteristics (Ta = 25 C, VM = 24 V) 9.3.1. AC Electrical Characteristics Timing Chart 10. Application Circuit Example 11. Package Information 11.1. Package Dimensions 12. IC Usage Considerations 12.1. Notes on Handling of ICs 12.2. Points to Remember on Handling of Ics RESTRICTIONS ON PRODUCT USE