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Toshiba Semiconductor and Storage TB67S149FTG,EL
- Part No.:
- TB67S149FTG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
TB67S149FTG,EL.pdf
- Description:
- IC MOTOR DRIVER UNIPOLAR 48WQFN
- Quantity:
- Payment:
- Shipping:
Inventory:5,905
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Product details
Overview
TB67S149FTG from Toshiba Electronic Devices & Storage Corporation is a clock-controlled, PWM chopping-type 2-phase unipolar stepping motor driver IC fabricated in BiCD process. It delivers up to 3.0 A per channel output current, supports 45 V VM supply and 84 V motor output voltage, and enables microstepping resolutions from full-step to 1/32-step - used in precision motion control for industrial automation actuators and optical positioning stages.
For engineers reviewing the TB67S149FTG datasheet, TB67S149FTG pinout, TB67S149FTG application, or TB67S149FTG equivalent, this page provides verified technical context, confirmed pin functions, real-world microstepping behavior, thermal error handling logic, and validated alternative options for unipolar stepper motor drive systems requiring high-voltage operation and fine step resolution.
Technical Context
The TB67S149FTG integrates dual N-channel MOSFET H-bridge drivers per phase with on-resistance of 0.25 Ω (typ.), fixed off-time PWM current regulation controlled via external OSCM resistor, and independent current sense ground pins (RSGNDA/RSGNDB) for accurate per-phase current monitoring. Its internal oscillator operates from 820 kHz to 8.2 MHz, enabling adjustable chopping frequency between 5 μs and 40 μs off-time.
Control logic includes dedicated DMODE0–DMODE2 pins for step resolution selection (full to 1/32), CW/CCW direction input, CLK-triggered step advancement, BRAKE mode that forces full-current short-circuit braking, and open-drain ERR/ALM outputs for TSD (140–170 °C) and ISD (3.1–5.0 A) fault reporting with masking times of 5.0 μs and 1.25 μs respectively.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current (per channel) | 3.0 A max (absolute rating); 1.5 A typical continuous under 25°C ambient with PCB mounting |
| VM Supply Voltage Range | 10–40 V operating; 45 V absolute max - supports 24 V and 36 V industrial bus rails |
| Motor Output Voltage | 10–80 V operating; 84 V absolute max - accommodates back-EMF spikes in high-inductance motors |
| Step Resolution | Full, half(a), half(b), quarter, 1/8, 1/16, 1/32 - selected via DMODE0–DMODE2 logic inputs |
| ON-Resistance (N-ch) | 0.25 Ω typ. - reduces conduction loss and thermal stress at 2 A load |
| Thermal Shutdown Threshold | 140–170 °C junction - latched fault requiring VM reset or standby mode toggle |
| Overcurrent Detection | 3.1–5.0 A threshold - detects short-circuit or stall conditions before destructive heating |
| CLK Input Frequency | Up to 100 kHz - enables step rates ≥100 kpps in 1/32-step mode |
Pinout & Package
Package: P-WQFN48-0707-0.50-003 (7.0 mm × 7.0 mm, 0.50 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUTA+, OUTA−, OUTB+, OUTB− | Motor phase output terminals | Dual H-bridge outputs driving unipolar stepper windings; each pair shares common VCOM reference |
| RSGNDA, RSGNDB | Current sense ground references | Separate low-impedance return paths for Ach/Bch current sensing - critical for accurate PWM regulation |
| VCOM | Common motor winding reference | Connects to center tap of unipolar stepper motor windings; must be routed with low-inductance layout |
| CLK, CW/CCW, ENABLE, BRAKE | Digital control inputs | Edge-triggered step advance (CLK↑), direction (CW/CCW logic level), output enable/disable, and dynamic braking activation |
| DMODE0–DMODE2 | Step resolution configuration | 3-bit binary input selecting full to 1/32-step mode; all low = standby (low-power shutdown) |
| ERR, ALM, MO | Open-drain status outputs | ERR signals TSD/ISD latch; ALM gives early thermal warning (120°C±15°C); MO indicates electrical zero angle |
| VREF | Constant-current threshold set | Analog voltage (0–4.0 V) setting peak output current: IOUT(max) = VREF × 0.75 |
| OSCM | Fixed off-time timing | External pull-down resistor (3.9–39 kΩ) sets PWM off-time from 4.1–37 μs |
Key Features
| Feature | Design Value |
|---|---|
| PWM constant-current drive | Adjustable peak current via VREF (0–4.0 V), enabling precise torque control across speed range |
| 1/32 microstepping resolution | Reduces vibration and audible noise while improving positional accuracy to ±1.4° electrical per step |
| Integrated brake mode | BRAKE = High forces simultaneous conduction of all four output MOSFETs for rapid motor deceleration |
| Multi-level fault detection | Independent reporting of thermal shutdown (TSD), overcurrent (ISD), and power-on reset (POR) via ERR/ALM pins |
| Low-power standby mode | All DMODE pins low disables internal oscillator and output stage, reducing quiescent current to ≤1.0 mA |
| Electrical angle monitor | MO pin asserts Low only at initial rotor position (after RESET), enabling homing without external encoder |
Applications
| Industrial CNC Positioning | Optical Lens Actuation |
|---|---|
Use Scenario: Precision linear stage in semiconductor wafer inspection system requiring sub-micron repeatability and smooth motion at low speeds. IC Role / Device Role / Timing Role: TB67S149FTG drives unipolar stepper motor with 1/32-step resolution and real-time current regulation to suppress resonance during acceleration/deceleration. Use Value: Eliminates need for external current-sense amplifiers and discrete gate drivers; integrated ALM output enables predictive thermal derating before TSD latch occurs. |
Use Scenario: Autofocus mechanism in medical endoscope camera where compact size and silent operation are mandatory. IC Role / Device Role / Timing Role: TB67S149FTG provides quiet 1/16-step motion using low-noise PWM chopping and fast CLK response (<1.2 μs), synchronized to image capture timing. Use Value: On-chip VCC regulator powers internal logic from VM rail, removing need for separate 5 V supply; MO pin simplifies closed-loop homing sequence. |
| Automated Test Equipment (ATE) | Lab Automation Dispensers |
Use Scenario: XY sample stage in automated PCB test handler requiring rapid indexing between test points with repeatable torque. IC Role / Device Role / Timing Role: TB67S149FTG executes full-step moves at 100 kpps using 100 kHz CLK input, with ENABLE toggling to disable motor between cycles. Use Value: 45 V VM rating supports 36 V bus for higher torque at speed; built-in ISD protection prevents damage during probe contact faults. |
Use Scenario: Reagent dispensing arm in clinical analyzer needing calibrated volume delivery via precise angular displacement. IC Role / Device Role / Timing Role: TB67S149FTG controls unipolar stepper with quarter-step resolution and VREF-set current to maintain consistent fluid displacement per step. Use Value: RSGNDA/RSGNDB separation ensures accurate per-winding current matching; thermal alarm (ALM) allows graceful shutdown before viscosity-induced stall overheats motor. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unipolar stepping motor driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TB67S109AFTG | Lower VM rating (36 V max), 2.0 A output current, no ALM pin, same WQFN48 package | Suitable for 24 V systems with lower torque requirements; lacks thermal warning capability | Select when cost sensitivity outweighs need for early thermal margin monitoring |
| STSPIN220 | 40 V VM, 1.3 A output, integrated current sense, SPI interface instead of parallel DMODE/CLK | Requires MCU firmware integration; supports dynamic current scaling but no 1/32-step mode | Prefer when system already uses SPI peripherals and needs programmable current profiles over fixed microstep tables |
Compared with TB67S149FTG, TB67S109AFTG trades voltage/current headroom for lower BOM cost, while STSPIN220 replaces hardware step configuration with digital control flexibility - neither offers identical 1/32-step + ALM + 45 V VM combination in a pin-compatible footprint.
Availability
TB67S149FTG is available at Aetrix Electronics and suitable for industrial CNC positioning, optical lens actuation, automated test equipment, and lab automation dispensers requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TB67S149FTG 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 analog and power ICs for industrial, automotive, and consumer applications, with expertise in BiCD process technology for integrated power management.
The TB67S149FTG belongs to Toshiba's stepper motor driver product line, engineered specifically for unipolar motor control in space-constrained, high-voltage industrial motion systems requiring precise microstepping and robust fault handling.
FAQ
What is the maximum continuous output current supported by the TB67S149FTG under standard PCB mounting conditions?
The TB67S149FTG supports 1.5 A continuous output current per channel when mounted on a 4-layer PCB at 25°C ambient temperature, based on its 4.1 W power dissipation rating and thermal resistance. At higher ambient temperatures, derating applies at 32.8 mW/°C above 25°C. Absolute maximum rating is 3.0 A, but sustained operation at that level requires aggressive heatsinking beyond standard layouts. The TB67S149FTG datasheet specifies this limit in Table 8.1 under Operating Ranges.
How does the BRAKE function operate in the TB67S149FTG, and what effect does it have on motor current?
When BRAKE = High, the TB67S149FTG activates all four output MOSFETs simultaneously, shorting both motor phases to VCOM and forcing rapid deceleration. During constant-current mode (VREF ≤ 4.0 V), this sets output current to ±100% magnitude; during constant-current-off mode (VREF tied to VCC), it creates a low-impedance path that dissipates kinetic energy as heat in the motor windings. The TB67S149FTG maintains full current capability in BRAKE mode, unlike coasting or high-Z states.
Can the TB67S149FTG drive bipolar stepper motors, or is it strictly limited to unipolar configurations?
The TB67S149FTG is designed exclusively for unipolar stepper motors, as confirmed by its VCOM pin architecture, dual-H-bridge topology per phase, and requirement for center-tapped windings. It cannot drive standard 4-wire bipolar steppers because it lacks complementary high-side/low-side drive per winding and does not support phase reversal without VCOM reference. Attempting bipolar connection risks incorrect current paths and potential device damage. The TB67S149FTG block diagram and Pin Description section explicitly define VCOM as the unipolar common terminal.
What is the purpose of the RSGNDA and RSGNDB pins on the TB67S149FTG, and why are they duplicated?
RSGNDA and RSGNDB are dedicated, low-impedance ground return paths for the internal current-sense amplifiers monitoring phase A and phase B currents respectively. Each appears twice (pins 15/16 and 21/22) to minimize PCB trace inductance and voltage drop - critical for stable PWM current regulation. Separating sense grounds from power GND prevents switching noise from corrupting current feedback. The TB67S149FTG datasheet emphasizes routing these pins directly to a solid ground plane beneath the IC, not daisy-chaining them with other grounds.
How does the TB67S149FTG handle thermal overload, and what distinguishes the ALM and ERR outputs?
The TB67S149FTG uses two-tier thermal monitoring: ALM asserts Low at 120°C ±15°C (thermal alarm), auto-recovering when temperature drops ~30°C below threshold; ERR asserts Low at 140–170°C (thermal shutdown), latching until VM is cycled or standby mode is entered. ALM enables proactive derating (e.g., reduce CLK rate), while ERR indicates immediate fault requiring intervention. Both are open-drain outputs requiring 3.3 V or 5 V pull-up. This dual-level scheme is documented in Tables 6.10, 6.11, and 9.2 of the TB67S149FTG datasheet.
TB67S149FTG,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 48-WFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Unipolar
- Motor Type - AC, DC:
- -
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (2)
- Interface:
- Parallel
- Technology:
- Power MOSFET
- Step Resolution:
- 1 ~ 1/32
- Applications:
- General Purpose
- Current - Output:
- 3A
- Voltage - Supply:
- 4.75V ~ 5.25V
- Voltage - Load:
- 10V ~ 40V
- Operating Temperature:
- -20°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-WQFN (7x7)
TB67S149FTG,EL FAQ
1.How can I place an order for TB67S149FTG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TB67S149FTG,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 TB67S149FTG,EL reliable?
The price and inventory of TB67S149FTG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB67S149FTG,EL is usually 5 days.
3.What payment methods are accepted for TB67S149FTG,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB67S149FTG,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB67S149FTG,EL?
TB67S149FTG,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB67S149FTG,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 TB67S149FTG,EL?
For technical support, including TB67S149FTG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB67S149FTG,EL requirements.
6.How does Aetrix verify that TB67S149FTG,EL is sourced from the original manufacturer or authorized distributors?
All TB67S149FTG,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 TB67S149FTG,EL meets industry standards.
7.What is the process for return or replacement of TB67S149FTG,EL?
All TB67S149FTG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TB67S149FTG,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 TB67S149FTG,EL part is unused and in its original packaging.
Return procedure for TB67S149FTG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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