Datasheet TB67S531FTG (Toshiba)

TB67S531FTG Toshiba BiCD Process Integrated Circuit Silicon Monolithic
TB67S531FTG
BiCD Constant-Current Two-Phase Bipolar Stepping Motor Driver IC
1. Description
TB67S531FTG is a two-phase bipolar stepping motor driver using a PWM chopper. TB 67S531FTG Fabricated with the BiCD process, TB67S531FTG is rated at 40 V/2.0 A (Absolute maximum ratings). A stepping motor can be operated with a single VM power supply by built-in regulator. P-VQFN32-0505-0.50-008
2. Features
Weight:0.066 g (typ.) ● BiCD process monolithic IC. ● Capable of controlling bipolar stepping motor. ● Advanced Current Detect System (ACDS) realizes a PWM constant-current control without external current detection resistors. ● Advanced Dynamic Mixed Decay (ADMD) realizes a high efficiency PWM constant-current control. ● Phase input control. ● Operational in full, half, quarter step resolutions. ● BiCD process: Use DMOSFET for the output power transistor. ● High voltage / high current drive: 40 V / 2.0 A (Absolute maximum ratings). ● Thermal shutdown (TSD), over-current detection (ISD), and under voltage lockout (UVLO). ● The charge pump requires no external components. ● Package: QFN32 (5 mm × 5 mm). Start of commercial production 2026-03 ©2026 1 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