My Inquiry
My Account
Toshiba Semiconductor and Storage TB67S149AFTG,EL
- Part No.:
- TB67S149AFTG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 48-WFQFN Exposed Pad
- Datasheet:
-
TB67S149AFTG,EL.pdf
- Description:
- UNIPOLAR STEPPER MOTOR DRIVER, 8
- Quantity:
- Payment:
- Shipping:
Inventory:3,948
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
TB67S149AFTG 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 1/32 microstepping resolution, and operates with VM supply up to 40 V (84 V absolute max), enabling precise motion control in compact industrial actuators and automated optical systems.
For engineers reviewing the TB67S149AFTG datasheet, TB67S149AFTG pinout, TB67S149AFTG application, or TB67S149AFTG equivalent, key selection considerations include its 0.25 Ω (typ.) low-side MOSFET on-resistance, integrated thermal/overcurrent error detection (TSD/ISD), programmable fixed off-time via OSCM pin, and support for full/half/quarter/1/8/1/16/1/32 step modes with independent CW/CCW and brake control.
Technical Context
The TB67S149AFTG implements a dual-channel PWM constant-current drive architecture with internal pre-drivers, N-channel power MOSFET outputs, and current-sense ground pins (RSGNDA/RSGNDB) for accurate phase current regulation. Its oscillator-based timing engine enables precise step advancement synchronized to external CLK edges while supporting dynamic direction (CW/CCW) and braking via dedicated logic inputs.
It integrates multiple protection layers: thermal shutdown (TSD) at 140–170 °C, overcurrent detection (ISD) at 3.1–5.0 A, low-voltage lockout (POR), and open-drain error feedback (ERR/ALM/MO). The device enters low-power standby mode when all DMODE pins are low, disabling the internal oscillator and output stage while retaining logic state.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current (per channel) | 3.0 A max (absolute rating); 1.5 A typical continuous under thermal design constraints |
| VM Supply Range | 10–40 V operating; 45 V absolute max - supports 24 V industrial rails and high-back-EMF motors |
| Step Resolution | Full, half(a), half(b), quarter, 1/8, 1/16, and 1/32 - selectable via DMODE0–2 pins |
| On-Resistance (N-ch) | 0.25 Ω typ. - reduces conduction loss and heat generation at rated current |
| Current Sensing | VREF-based threshold: IOUT(max) = VREF × 0.75 - enables precise 0–4.0 V programmable peak current |
| Error Detection | Integrated TSD (140–170 °C), ISD (3.1–5.0 A), and POR - latched open-drain ERR output |
| Fixed Off-Time Control | Set via OSCM pin with external resistor (3.9–39 kΩ); 5–40 μs range - tunes PWM decay behavior |
Pinout & Package
Package: P-WQFN48-0707-0.50-003 (48-pin Wettable Flank Quad Flat No-lead, 7 mm × 7 mm, 0.5 mm pitch, exposed thermal pad).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| CLK | External clock input | Rising-edge-triggered step advance; supports ≤100 kHz frequency for precise speed control |
| ENABLE | Motor output enable | High = normal operation; Low = high-impedance output stage - critical for safe power sequencing |
| CW/CCW | Direction control | High = clockwise (Ach leads Bch by 90°); Low = counterclockwise - sets electrical angle polarity |
| BRAKE | Brake mode input | High = short-circuits motor phases to stop rotation rapidly; maintains 100% current ratio during brake |
| OUTA+/OUTA-/OUTB+/OUTB- | Motor phase outputs | N-channel power MOSFET terminals; paired for unipolar 2-phase winding connection |
| RSGNDA / RSGNDB | Current sense ground | Dedicated low-impedance return paths for Ach/Bch current sensing - must be routed separately to minimize noise |
| VREF | Current threshold set | Analog voltage input (0–4.0 V); sets peak output current via IOUT = VREF × 0.75 |
| OSCM | Fixed off-time set | Resistor-connected pin controlling PWM decay time (5–40 μs); determines current ripple and torque smoothness |
| ERR / ALM / MO | Open-drain status outputs | ERR: TSD/ISD latch; ALM: thermal alarm (120°C ±15°C, auto-recover); MO: initial angle indicator (open-drain) |
| DMODE0–2 | Step resolution & standby control | 3-bit binary code selects microstep mode or activates low-power standby (all Low) |
Key Features
| Feature | Design Value |
|---|---|
| PWM constant-current drive | Enables stable torque across speed range by regulating phase current independent of back-EMF or load variation |
| 1/32 microstepping resolution | Reduces vibration and audible noise in precision positioning systems such as lab automation stages and medical pumps |
| Integrated thermal & overcurrent protection | Hardware-latched TSD/ISD detection with ERR output eliminates need for external monitoring circuitry |
| Brake and standby modes | Brake halts motor instantly without coasting; standby cuts bias current to <1 mA - essential for battery-powered devices |
| Low on-resistance (0.25 Ω typ.) | Minimizes power dissipation at 3 A, allowing higher continuous current in thermally constrained PCB layouts |
Applications
| Industrial CNC Positioning | Medical Infusion Pumps |
|---|---|
|
Use Scenario: Closed-loop linear actuator in multi-axis CNC table requiring sub-micron repeatability and low resonance. IC Role / Device Role / Timing Role: Unipolar stepper driver executing 1/32-step microstepping with real-time current regulation and CLK-synchronized position updates. Use Value: 0.25 Ω on-resistance and 100 kHz CLK support enable rapid acceleration/deceleration without thermal throttling or step loss. |
Use Scenario: Peristaltic pump in portable IV delivery system requiring silent, jitter-free fluid metering at variable flow rates. IC Role / Device Role / Timing Role: Clock-controlled stepper driver managing precise angular displacement per pulse, with brake mode for immediate flow stop. Use Value: Integrated ALM thermal alarm (120°C ±15°C) and auto-recovery prevent overheating during extended duty cycles in sealed enclosures. |
| Automated Optical Inspection | Lab Automation Robotic Arms |
|
Use Scenario: High-speed XY stage moving camera/sensor across PCBs for defect scanning, demanding smooth motion and minimal vibration. IC Role / Device Role / Timing Role: Dual-channel unipolar driver delivering synchronized A/B phase currents with adjustable fixed off-time for optimized current decay. Use Value: OSCM-adjustable off-time (5–40 μs) allows tuning of microstep smoothness and torque ripple to match lens inertia and scan profile. |
Use Scenario: Joint actuator in collaborative robot arm where safety, reliability, and predictable stall behavior are critical. IC Role / Device Role / Timing Role: Stepper driver with hardware-enforced TSD/ISD protection and latched ERR signal for system-level fault reporting. Use Value: Latched error detection (cleared only by VM reset or standby toggle) ensures faults are not missed in real-time safety monitoring loops. |
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 | Same BiCD process, 2.5 A max output, 1/16 max microstepping, no ALM pin | Lacks thermal alarm feedback and 1/32 resolution - suitable for cost-sensitive, lower-current systems | Choose when thermal margin is ample and 1/16 step suffices; shares pinout compatibility but reduced feature set |
| STSPIN250 | 45 V max VM, 3.2 A max, 1/128 microstepping, SPI interface, no standalone CLK mode | Requires MCU-based configuration; lacks native clock-step interface and discrete BRAKE/ENABLE pins | Prefer when system already uses SPI bus and requires highest resolution; not drop-in for CLK-driven designs |
Compared with TB67S109AFTG, the TB67S149AFTG adds 1/32 microstepping and ALM feedback for tighter thermal management; versus STSPIN250, it offers simpler hardware control via dedicated logic pins but sacrifices SPI configurability and ultra-fine resolution.
Availability
TB67S149AFTG is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, automated optical inspection, and lab automation robotic arms requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for TB67S149AFTG 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 deep expertise in BiCD process technology and motor control integration.
The TB67S149AFTG belongs to Toshiba's TB67S series of advanced stepping motor drivers, engineered specifically for compact, high-torque unipolar stepper systems requiring robust protection, fine microstepping, and minimal external components.
FAQ
What is the maximum continuous output current supported by the TB67S149AFTG?
The TB67S149AFTG has an absolute maximum output current rating of 3.0 A per channel, but its practical continuous current depends on thermal design. Under typical conditions (4-layer PCB, 25 °C ambient), it supports up to 1.5 A continuously due to power dissipation limits (5 W max when mounted). Derating is required above 25 °C at 40 mW/°C. Always verify junction temperature using Rth(j-a) and actual layout.
How does the TB67S149AFTG implement microstepping resolution control?
The TB67S149AFTG uses three digital inputs - DMODE0, DMODE1, and DMODE2 - to select among eight step modes: standby, full, half(a), half(b), quarter, 1/8, 1/16, and 1/32. Each combination configures internal current phasing and PWM timing to achieve the specified electrical angle division. The 1/32 mode provides the finest positional resolution and lowest vibration, ideal for precision motion systems.
Can the TB67S149AFTG drive bipolar stepper motors?
No, the TB67S149AFTG is designed exclusively for unipolar stepping motors. Its output architecture consists of four N-channel MOSFETs (OUTA+, OUTA−, OUTB+, OUTB−) configured for single-polarity current flow through center-tapped windings. It lacks H-bridge topology and complementary drive capability required for bipolar motor control. For bipolar applications, consider Toshiba's TB67S279FTG or similar H-bridge drivers.
What is the function of the RSGNDA and RSGNDB pins on the TB67S149AFTG?
RSGNDA and RSGNDB are dedicated current-sense ground terminals for phase A and phase B, respectively. They provide low-impedance, noise-isolated return paths for the internal current-sensing comparators. Routing these pins separately to a star ground point - not shared with power or logic GND - ensures accurate VREF-based current regulation and prevents false overcurrent trips caused by ground bounce or IR drop.
How does the brake mode operate in the TB67S149AFTG?
When the BRAKE pin is driven high, the TB67S149AFTG simultaneously turns on all four output MOSFETs (OUTA+, OUTA−, OUTB+, OUTB−), shorting both motor phases to create dynamic braking. This stops rotor motion rapidly without relying on mechanical friction. During brake mode, the current ratio remains at 100%, ensuring immediate torque response. CLK signals remain functional, allowing angle tracking even while braking.
TB67S149AFTG,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:
- On/Off
- Technology:
- NMOS
- Step Resolution:
- -
- Applications:
- General Purpose
- Current - Output:
- -
- Voltage - Supply:
- 4.75V ~ 5.25V
- Voltage - Load:
- 10V ~ 40V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-WQFN (7x7)
TB67S149AFTG,EL FAQ
1.How can I place an order for TB67S149AFTG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TB67S149AFTG,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 TB67S149AFTG,EL reliable?
The price and inventory of TB67S149AFTG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB67S149AFTG,EL is usually 5 days.
3.What payment methods are accepted for TB67S149AFTG,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB67S149AFTG,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB67S149AFTG,EL?
TB67S149AFTG,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB67S149AFTG,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 TB67S149AFTG,EL?
For technical support, including TB67S149AFTG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB67S149AFTG,EL requirements.
6.How does Aetrix verify that TB67S149AFTG,EL is sourced from the original manufacturer or authorized distributors?
All TB67S149AFTG,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 TB67S149AFTG,EL meets industry standards.
7.What is the process for return or replacement of TB67S149AFTG,EL?
All TB67S149AFTG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TB67S149AFTG,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 TB67S149AFTG,EL part is unused and in its original packaging.
Return procedure for TB67S149AFTG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
TB67S149AFTG,EL Tags
-
DRV2603RUNR
Texas Instruments
-
DRV8837CDSGR
Texas Instruments
-
DRV8837DSGR
Texas Instruments
-
DRV8838DSGR
Texas Instruments
-
DRV8839DSSR
Texas Instruments
-
EMC2301-1-ACZL-TR
Microchip Technology
-
DRV8231ADSGR
Texas Instruments
-
EMC2302-2-AIZL-TR
Microchip Technology
-
DRV8800PWPR
Texas Instruments
-
DRV8835DSSR
Texas Instruments
-
EMC2303-1-KP-TR
Microchip Technology
-
DRV8876PWPR
Texas Instruments
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
