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Toshiba Semiconductor and Storage TB67S128FTG,EL
- Part No.:
- TB67S128FTG,EL
- Manufacturer:
- Toshiba Semiconductor and Storage
- Category:
- Motor Drivers, Controllers
- Package:
- 64-VFQFN Exposed Pad
- Datasheet:
-
TB67S128FTG,EL.pdf
- Description:
- STEPPE RMOTOR DRIVER IC WITH ACT
- Quantity:
- Payment:
- Shipping:
Inventory:6,173
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Product details
Overview
TB67S128FTG from Toshiba Electronic Devices & Storage Corporation is a BiCD monolithic bipolar stepping motor driver with integrated PWM chopper, clock-in/serial interface, and advanced current control. It delivers 5.0 A peak output current at 44 V motor supply, supports microstepping down to 1/128-step resolution, and integrates ADMD (Advanced Dynamic Mixed Decay) and AGC (Active Gain Control) for high-efficiency torque regulation in precision motion systems.
For engineers reviewing the TB67S128FTG datasheet, TB67S128FTG pinout, TB67S128FTG application, or TB67S128FTG equivalent, key selection considerations include its 64-pin VQFN thermal-pad package, sense-resistor-less ACDS current detection, programmable mixed-decay ratio via MDT pins, and dual-mode interface (CLK or serial) with error flag outputs (LO0/LO1) for industrial stepper control.
Technical Context
The TB67S128FTG implements a two-phase bipolar H-bridge output stage using Toshiba's BiCD process, enabling 50 V/5.0 A absolute maximum ratings and 0.25 Ω typical total on-resistance (high + low side). Its core timing engine uses an internal oscillator (0.64–2.4 MHz) adjustable via OSCM pin, with chopping frequency set by external RC network.
Control architecture includes three operational layers: interface logic (CLK mode or serial mode selected by IF_SEL), microstep sequencing (via MODE0–MODE2), and real-time current regulation using ADMD - which dynamically balances fast/slow decay based on both charge and discharge current monitoring - plus AGC for closed-loop gain adaptation during stall conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Output Current | 5.0 A peak per phase - enables direct drive of NEMA 23–34 stepper motors without external current amplification |
| Motor Supply Voltage | 6.5 V to 44 V - supports wide-range DC bus operation including 24 V and 48 V industrial systems |
| Microstep Resolution | Full, 1/2, 1/4, 1/8, 1/16, 1/32, 1/64, 1/128 - selectable via MODE0–MODE2 pins with no firmware required |
| Total On-Resistance | 0.25 Ω (typ.) - reduces conduction loss and thermal stress at full load, improving efficiency over discrete FET solutions |
| Current Sensing | ACDS (sense-resistor-less) or external RS resistor - eliminates need for precision shunt resistors and associated PCB area/heat |
| Error Detection | TSD, ISD, OPD, POR - flags reported on LO0/LO1 pins for real-time system-level fault handling and safe shutdown |
| Interface Modes | CLK mode (step/direction) or serial mode (SPI-like DATA/CW-CCW) - selected by IF_SEL pin for flexible controller integration |
Pinout & Package
P-VQFN64-0909-0.50-006: 9 mm × 9 mm, 0.5 mm pitch, exposed thermal pad (soldered to GND) for enhanced power dissipation in high-current stepper applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| OUT_A+, OUT_A− OUT_B+, OUT_B− | Two-phase H-bridge outputs | Drive bipolar stepper windings directly; each pair must be routed with matched impedance and minimal loop area |
| RS_A, RS_B | Current sense inputs | Connect to GND (ACDS mode) or external sense resistor (RS mode); critical for accurate current regulation |
| VM (pins 33, 34) | Motor power supply input | High-current path requiring thick copper pour and decoupling near package; supports up to 44 V |
| VREF | Current threshold reference | Analog voltage (0–3.6 V) sets peak current; gain selectable (1/5 or 1/10) via GAIN_SEL |
| CLK, CW/CCW, ENABLE, STANDBY | Digital control inputs | Standard 5 V-tolerant logic; ENABLE places outputs in Hi-Z to halt motor safely during power transitions |
| LO0, LO1 | Error flag outputs | Open-drain outputs indicating TSD/ISD/OPD faults; require pull-up for active-low signaling to host MCU |
Key Features
| Feature | Design Value |
|---|---|
| ADMD (Advanced Dynamic Mixed Decay) | Real-time adjustment of fast/slow decay ratio based on both charge and discharge current - minimizes torque ripple and audible noise across speed range |
| AGC (Active Gain Control) | Automatic gain adaptation during stall detection - maintains precise current regulation without external feedback loop |
| ACDS (Advanced Current Detection System) | Sense-resistor-less current sensing - eliminates shunt resistor cost, layout complexity, and thermal drift errors |
| 1/128-step microstepping | Hardware-based resolution selection - achieves sub-micron positioning accuracy without microcontroller interpolation overhead |
| Built-in charge pump (CP+, CP−, CPOUT) | Enables high-side gate drive for N-channel MOSFETs - ensures full enhancement of upper FETs across full VM range |
Applications
| Industrial CNC Positioning | Medical Infusion Pumps |
|---|---|
Use Scenario: High-precision linear actuation in multi-axis milling machines requiring smooth motion at low speeds and high holding torque. IC Role / Device Role / Timing Role: Bipolar stepper driver executing microstepped position commands via CLK interface; ADMD suppresses vibration during dwell and acceleration phases. Use Value: 1/128-step resolution and <0.25 Ω on-resistance enable sub-arcsecond repeatability and reduced thermal derating vs. legacy drivers. | Use Scenario: Silent, accurate fluid delivery in portable infusion pumps where acoustic noise and positional error directly impact patient safety. IC Role / Device Role / Timing Role: Stepper motor controller managing flow rate via serial interface; AGC compensates for motor load variance caused by tubing occlusion or viscosity changes. Use Value: ACDS eliminates shunt resistor heating in compact enclosures, while ADMD ensures consistent step response across battery voltage decay (6.5–44 V). |
| Automated Optical Inspection (AOI) | 3D Printer Extruder Control |
Use Scenario: Sub-pixel camera positioning in semiconductor wafer inspection systems demanding jitter-free motion at 10–100 mm/s. IC Role / Device Role / Timing Role: Two-phase driver receiving step pulses from FPGA; LO0/LO1 flags trigger immediate abort on open-load (OPD) or overcurrent (ISD). Use Value: Integrated error detection avoids mechanical damage from stalled motors, and 0.25 Ω RDS(on) sustains 5 A peak without external heatsink. | Use Scenario: Filament feed control in fused deposition modeling (FDM) printers requiring responsive torque modulation during layer transitions and retraction. IC Role / Device Role / Timing Role: Microstepping driver with torque scaling (TORQE0–2) and dynamic decay tuning (MDT0/MDT1) to match extruder load profiles. Use Value: Hardware-selectable torque (10–100%) and ADMD reduce extruder skipping and stringing, improving print fidelity without firmware tuning. |
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/3.5 A max; integrated current sense but no ACDS; requires external shunt for >2 A | Limited to lower-power steppers; lacks ADMD and AGC for dynamic load compensation | Preferred for cost-sensitive, lower-current (<3 A) designs where sensorless current detection is not required |
| MP6500 | 36 V/2.5 A max; fixed 1/8–1/32 microstepping; no serial interface or AGC | Suitable only for basic step/dir applications; no stall detection or adaptive decay control | Appropriate for simple, low-complexity motion control where advanced diagnostics and fine microstepping are unnecessary |
Compared with STSPIN820 and MP6500, the TB67S128FTG provides higher current capability (5.0 A), finer microstepping (1/128), and unique sensorless current control (ACDS) with adaptive decay (ADMD) and stall compensation (AGC), making it optimal for high-fidelity industrial and medical motion systems where precision, silence, and reliability are critical.
Availability
TB67S128FTG is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pumps, automated optical inspection, and 3D printer extruder control requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for TB67S128FTG 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-performance analog and power ICs for industrial, automotive, and consumer applications, with leadership in BiCD process technology and motor control integration.
The TB67S128FTG belongs to Toshiba's TB67S series of intelligent bipolar stepper drivers, engineered specifically for high-current, low-noise, and high-resolution motion control in space-constrained industrial equipment.
FAQ
What is the maximum motor supply voltage supported by the TB67S128FTG?
The TB67S128FTG supports a motor supply voltage range of 6.5 V to 44 V. This allows direct compatibility with common industrial DC bus voltages including 24 V and 48 V systems. Operation above 44 V exceeds absolute maximum ratings and may cause permanent device failure. The 50 V absolute maximum rating provides margin for transient spikes but is not intended for continuous operation.
How does the ACDS (Advanced Current Detection System) eliminate the need for external sense resistors in the TB67S128FTG?
The ACDS in the TB67S128FTG uses internal MOSFET channel resistance monitoring combined with precision analog circuitry to infer motor current without external shunts. When RS_SEL = L, the RS_A and RS_B pins are internally connected to GND, and current is derived from voltage drop across integrated FETs. This removes PCB layout sensitivity, thermal drift, and power loss associated with discrete shunts - confirmed in Toshiba's datasheet Rev 3.2.A Section 8.11.
Can the TB67S128FTG operate in both clock-in and serial interface modes, and how is the mode selected?
Yes, the TB67S128FTG supports both CLK mode (step/direction) and serial mode (DATA/CW-CCW) via the IF_SEL pin. When IF_SEL = L, CLK and CW/CCW function as step clock and direction inputs. When IF_SEL = H, the same pins accept serial data and command bits. This dual-mode flexibility enables seamless integration with both simple microcontrollers and complex FPGAs without hardware redesign - detailed in Section 7 of the TB67S128FTG datasheet.
What thermal management requirements apply to the TB67S128FTG in high-current operation?
The TB67S128FTG uses a P-VQFN64 package with an exposed thermal pad that must be soldered to a large GND copper area on the PCB. Toshiba specifies corner pad and rear thermal pad soldering to GND for effective heat transfer. At 5.0 A continuous, thermal resistance (θJA) depends heavily on PCB copper area; insufficient thermal design risks triggering TSD (thermal shutdown). Section 1 of the datasheet explicitly warns: "Please be careful about thermal conditions during using."
Does the TB67S128FTG provide hardware-based microstepping resolution selection, and what are the supported steps?
Yes, the TB67S128FTG implements hardware-selectable microstepping via MODE0, MODE1, and MODE2 pins - no firmware or register writes needed. Supported resolutions are full, half, quarter, 1/8, 1/16, 1/32, 1/64, and 1/128 step, as defined in Table 8.5 of the datasheet. Pin states can be changed dynamically during operation, enabling real-time resolution switching for hybrid motion profiles (e.g., coarse positioning followed by fine alignment).
TB67S128FTG,EL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Toshiba Semiconductor and Storage
- Series:
- -
- Package/Case:
- 64-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Motor Type - Stepper:
- Bipolar
- Motor Type - AC, DC:
- Brushless DC (BLDC)
- Function:
- Driver - Fully Integrated, Control and Power Stage
- Output Configuration:
- Half Bridge (4)
- Interface:
- PWM
- Technology:
- Power MOSFET
- Step Resolution:
- 1, 1/2, 1/4, 1/8, 1/16, 1/32, 1/128
- Applications:
- General Purpose
- Current - Output:
- 5A
- Voltage - Supply:
- 4.75V ~ 5.25V
- Voltage - Load:
- 6.5V ~ 44V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 64-VQFN (9x9)
TB67S128FTG,EL FAQ
1.How can I place an order for TB67S128FTG,EL through Aetrix?
Please submit a Request for Quotation (RFQ) for TB67S128FTG,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 TB67S128FTG,EL reliable?
The price and inventory of TB67S128FTG,EL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TB67S128FTG,EL is usually 5 days.
3.What payment methods are accepted for TB67S128FTG,EL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TB67S128FTG,EL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TB67S128FTG,EL?
TB67S128FTG,EL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TB67S128FTG,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 TB67S128FTG,EL?
For technical support, including TB67S128FTG,EL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TB67S128FTG,EL requirements.
6.How does Aetrix verify that TB67S128FTG,EL is sourced from the original manufacturer or authorized distributors?
All TB67S128FTG,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 TB67S128FTG,EL meets industry standards.
7.What is the process for return or replacement of TB67S128FTG,EL?
All TB67S128FTG,EL units undergo pre-shipment inspection (PSI). If there is an issue with TB67S128FTG,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 TB67S128FTG,EL part is unused and in its original packaging.
Return procedure for TB67S128FTG,EL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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