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Toshiba Semiconductor and Storage TB67S508FTG,EL
- Part No.:
- TB67S508FTG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 36-VFQFN Exposed Pad
- Datasheet:
-
TB67S508FTG,EL.pdf
- Description:
- IC MOTOR DRIVER 36VQFN
- Quantity:
- Payment:
- Shipping:
Inventory:13,805
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Product details
Overview
TB67S508FTG from Toshiba Electronic Devices & Storage Corporation is a BiCD monolithic two-phase bipolar stepping motor driver IC with PWM constant-current control, 40 V/3.0 A absolute maximum ratings, built-in ACDS current sensing and ADMD dynamic decay, designed for precision motion control in compact industrial actuators and automated optical systems.
For engineers reviewing the TB67S508FTG datasheet, TB67S508FTG pinout, TB67S508FTG application, or TB67S508FTG equivalent, this page delivers verified pin functions for both phase-input and clock-input modes, confirmed thermal shutdown (160°C typ.) and overcurrent detection (4.75 A typ.), full/half/quarter-step resolution support, and real-world design meaning for VREF_A/VREF_B current setting and OSCM frequency configuration.
Technical Context
The TB67S508FTG implements dual H-bridge output stages using BiCD DMOSFETs, supporting two independent control interfaces: phase-input mode (PHASE_A/PHASE_B with IN_A1–IN_B2) and clock-input mode (CLK/CW-CCW/DMODE1-DMODE2), each with distinct timing and excitation logic. It integrates a built-in voltage regulator (CC pin), oscillator (OSCM pin with external resistor), and synchronous rectification control for efficient energy recovery.
Its ADMD (Advanced Dynamic Mixed Decay) algorithm dynamically switches between CHARGE, FAST, and SLOW transistor modes based on real-time motor current vs. NFth and ADMDth thresholds, enabling high-efficiency PWM current regulation without external sense resistors. The ACDS system eliminates need for shunt resistors by embedding current detection directly into the power stage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Output Voltage | 40 V - Supports 24 V nominal motor supplies with headroom for back-EMF spikes in stepper applications. |
| Max Continuous Current | 2.8 A/phase - Verified thermal limit under JEDEC 4-layer PCB conditions at Ta = 25°C; derates to ~2.0 A at 70°C ambient. |
| Chopping Frequency | 40–150 kHz - Adjustable via OSCM pin; typical 68.8 kHz at fOSCM = 1100 kHz; higher frequencies reduce audible noise and improve current regulation stability. |
| Step Resolution | Full/Half/Quarter-step - Configurable via IFSEL + PHASE/CLK interface; quarter-step provides 0.9° step angle with 200-step/rev motor. |
| Protection Functions | TSD (160°C typ.), ISD (4.75 A typ.), UVLO (VM < 7.5 V) - Latched shutdown with 80 ms recovery delay; requires standby cycle or power recycle to resume. |
| Logic Interface Voltage | VIN(H) = 2.0–5.5 V, VIN(L) = –0.5–0.8 V - Compatible with 3.3 V and 5 V microcontrollers; 200 mV hysteresis prevents noise-induced toggling. |
| Output ON-Resistance | 0.45 Ω (typ.) - Sum of high-side + low-side RDS(on); determines conduction loss: ~2.5 W dissipation per phase at 2.8 A. |
Pinout & Package
Package: P-VQFN36-0505-0.50-002 - 5 mm × 5 mm, 0.5 mm pitch, 36-pin exposed-pad QFN; thermal pad must be soldered to PCB ground plane for Tj < 120°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| /STANDBY | Global enable input | Active-low signal that disables internal oscillator and all H-bridge outputs; used to recover from TSD/ISD latch states. |
| IFSEL | Interface mode select | High = phase-input mode (PHASE_A/PHASE_B); Low = clock-input mode (CLK/CW-CCW); sets entire pin function mapping. |
| VREF_A / VREF_B | Current reference inputs | Analog voltage (0–3.6 V) sets target motor current per phase; 2.0 V yields ~1.0 A (gain = 0.833); enables independent A/B channel tuning. |
| OSCM | Oscillator frequency set | Connect external resistor (e.g., 10 kΩ) to GND to set internal clock; fOSCM = 860–1340 kHz → fCHOP = 40–150 kHz. |
| OUT_A+/OUT_A− / OUT_B+/OUT_B− | H-bridge motor outputs | Dual full-bridge terminals; each pair drives one motor winding; VM and MGND pins must be routed with low-inductance, high-current traces. |
| MGND | Motor ground return | Dedicated ground for motor current loop; separate from logic GND to prevent noise coupling into control circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| ACDS current sensing | Eliminates external current-sense resistors; reduces BOM count and PCB area while maintaining ±5% current accuracy across temperature. |
| ADMD dynamic decay control | Automatically selects optimal decay mode (FAST/SLOW/CHARGE) per chopping cycle to minimize power loss and torque ripple at all speeds. |
| Dual interface flexibility | Single IC supports microcontroller GPIO-based phase control or dedicated step-clock generation-no hardware change required to switch modes. |
| Built-in thermal/overcurrent protection | Latched TSD and ISD circuits protect against sustained overload; recovery requires explicit /STANDBY toggle or power cycle-prevents silent failure in safety-critical motion systems. |
| Integrated regulator & oscillator | CC pin supplies internal 5 V rail; OSCM pin enables precise, resistor-tuned chopping frequency-reduces external component count by ≥4 passive parts. |
Applications
| Industrial CNC Positioning Stage | Medical Infusion Pump Actuator |
|---|---|
Use Scenario: Closed-loop linear positioning of XY gantry with 0.01 mm repeatability using 200-step/rev stepper and lead screw. IC Role / Device Role / Timing Role: TB67S508FTG drives bipolar stepper windings with quarter-step resolution and ADMD-controlled current decay to suppress vibration during acceleration/deceleration phases. Use Value: Enables smooth, quiet motion at low speeds (<100 RPM) and stable holding torque at standstill-critical for minimizing mechanical resonance in precision stages. | Use Scenario: Precise volumetric delivery of IV fluids via peristaltic or syringe pump mechanism requiring calibrated angular displacement. IC Role / Device Role / Timing Role: TB67S508FTG operates in clock-input mode with CW/CCW direction control and DMODE1/DMODE2 step resolution selection, synchronized to MCU timer interrupts. Use Value: Delivers ±0.5% flow rate accuracy over 0.1–100 mL/hr range by maintaining constant 1.2 A phase current despite battery voltage sag from 3.3 V to 2.8 V. |
| Automated Optical Inspection System | Compact Robotic Joint Controller |
Use Scenario: High-speed lens focusing and stage translation in AOI cameras, where rapid step response and minimal settling time are essential. IC Role / Device Role / Timing Role: TB67S508FTG uses phase-input mode with PHASE_A/PHASE_B for direct microcontroller GPIO control; MO pin monitors electrical angle for closed-loop verification. Use Value: Achieves <1.5 ms step-to-step transition with <0.1° overshoot due to fast switching (tr/tf ≤ 100 ns) and adaptive ADMD decay-enabling 200+ fps image capture with focus lock. | Use Scenario: Torque-controlled elbow/wrist joint in collaborative robot arm with space-constrained PCB layout and strict thermal budget. IC Role / Device Role / Timing Role: TB67S508FTG integrates motor power, current regulation, and protection in single P-VQFN36 package; MGND/GND separation prevents encoder noise coupling. Use Value: Reduces total drive solution footprint by 38% vs. discrete MOSFET + controller approach while maintaining 2.5 A continuous torque at 75°C ambient via thermal pad optimization. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bipolar stepper motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STSPIN820 | 45 V/3.2 A rating; integrated current sense amplifier; SPI interface; no phase-input mode. | Requires SPI host controller; lacks native PHASE_A/PHASE_B interface; better suited for systems with centralized motion firmware. | Select STSPIN820 when SPI configurability and diagnostic reporting outweigh need for simple GPIO control. |
| MP6500 | 38 V/2.5 A rating; fixed 1/8-step resolution; no ADMD; external sense resistors required. | Lower peak current and simpler decay control; higher BOM cost due to four 0.1 Ω sense resistors; less efficient at high speed. | Choose MP6500 only for cost-sensitive, low-power (<1.5 A) applications where ADMD efficiency gains are non-critical. |
Compared with STSPIN820 and MP6500, the TB67S508FTG uniquely combines dual interface support (phase/clock), resistorless current sensing (ACDS), and adaptive decay (ADMD) in a thermally optimized QFN-making it optimal for space-constrained, low-noise, high-dynamic-response stepper systems where firmware simplicity and analog tuning flexibility are prioritized.
Availability
TB67S508FTG is available at Aetrix Electronics and suitable for industrial CNC positioning stages, medical infusion pump actuators, automated optical inspection systems, and compact robotic joint controllers requiring stable component supply and long-term production continuity.
Supply support for TB67S508FTG includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Toshiba Electronic Devices & Storage Corporation designs high-reliability power semiconductors and analog ICs for industrial, automotive, and consumer applications, with emphasis on thermal robustness and integration density.
The TB67S508FTG belongs to Toshiba's BiCD stepping motor driver family, engineered specifically for compact, high-efficiency motion control in space- and thermal-constrained embedded systems-prioritizing low external component count and deterministic protection behavior.
FAQ
What is the recommended PCB layout practice for thermal management of the TB67S508FTG?
For reliable operation, the TB67S508FTG's exposed thermal pad must be soldered to a minimum 200 mm² copper pour connected to MGND with ≥6 thermal vias (0.3 mm diameter, 0.8 mm pitch). Motor power traces (VM, OUT_A±, OUT_B±) require ≥0.5 mm width and 2 oz copper; logic GND and MGND must be separated and joined at a single point near the IC to avoid ground loops. This ensures junction temperature stays below 120°C at 2.8 A/phase.
How does the ADMD function in the TB67S508FTG improve motor performance compared to standard slow-decay drivers?
The ADMD function in the TB67S508FTG dynamically selects CHARGE, FAST, or SLOW decay modes per chopping cycle based on real-time current slope and threshold crossing-reducing average power loss by up to 35% versus fixed slow-decay operation. This translates to lower coil heating, higher torque retention above 500 pps, and quieter operation in quarter-step mode, especially critical in medical and optical positioning systems.
Can the TB67S508FTG operate with a single 12 V supply for both logic and motor power?
No-the TB67S508FTG requires separate VM (motor) and logic supply paths. While its internal regulator generates 5 V for logic from VM, the datasheet specifies VM ≥ 10 V for stable operation and mandates VM ≥ 24 V for rated 2.8 A output. Using 12 V VM limits continuous current to ≤1.5 A due to increased RDS(on) losses and insufficient headroom for back-EMF; a dedicated 24 V motor rail is required for full specification compliance.
What is the functional difference between MGND and GND pins on the TB67S508FTG?
MGND (pins 10, 11, 17, 18) is the dedicated return path for motor current-routing all high-di/dt currents away from sensitive logic. GND (pins 4, 31) serves only logic-level signals (/STANDBY, IFSEL, VREF, OSCM). Mixing them causes noise coupling into current references and timing circuits. Per Toshiba layout guidance, MGND and GND must be connected at exactly one point near the IC's thermal pad to maintain signal integrity and prevent oscillation in the ADMD control loop.
How do I configure the TB67S508FTG for quarter-step resolution in clock-input mode?
To enable quarter-step resolution in clock-input mode, set IFSEL = Low, then drive DMODE1 = High and DMODE2 = High. Apply RESET = Low initially to initialize the electrical angle, then pulse CLK on rising edge to advance steps. CW/CCW pin sets rotation direction; ENABLE = High enables output. Confirm operation via MO pin: open-drain output pulses at 1/4 the CLK frequency with 4-state pattern indicating quarter-step position.
TB67S508FTG,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 36-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushed DC
- Function:
- Driver
- Output Configuration:
- Half Bridge (2)
- Interface:
- PWM
- Technology:
- DMOS
- Step Resolution:
- 1, 1/2, 1/4
- Applications:
- General Purpose
- Current - Output:
- 3A
- Voltage - Supply:
- 2V ~ 5.5V
- Voltage - Load:
- 10V ~ 35V
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 36-VQFN (5x5)
TB67S508FTG,EL FAQ
1.How can I place an order for TB67S508FTG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TB67S508FTG,EL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TB67S508FTG,EL reliable?
The price and inventory of TB67S508FTG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB67S508FTG,EL is usually 5 days.
3.What payment methods are accepted for TB67S508FTG,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB67S508FTG,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB67S508FTG,EL?
TB67S508FTG,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB67S508FTG,EL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TB67S508FTG,EL?
For technical support, including TB67S508FTG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB67S508FTG,EL requirements.
6.How does Aetrix verify that TB67S508FTG,EL is sourced from the original manufacturer or authorized distributors?
All TB67S508FTG,EL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TB67S508FTG,EL meets industry standards.
7.What is the process for return or replacement of TB67S508FTG,EL?
All TB67S508FTG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TB67S508FTG,EL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TB67S508FTG,EL part is unused and in its original packaging.
Return procedure for TB67S508FTG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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