Toshiba Semiconductor and Storage TB67S101AFNG,EL

Overview

TB67S101AFNG,EL from Toshiba Electronic Devices & Storage Corporation is a two-phase bipolar stepping motor driver IC using PWM chopper control with PHASE-in interface logic, rated for 50 V motor supply and 4.0 A peak output current, featuring Advanced Dynamic Mixed Decay (ADMD) current regulation and integrated thermal/overcurrent protection. It enables full-, half-, and quarter-step operation in compact motion control systems such as industrial automation actuators and precision positioning stages.

For engineers reviewing the TB67S101AFNG,EL datasheet, TB67S101AFNG,EL pinout, TB67S101AFNG,EL application, or TB67S101AFNG,EL equivalent, this page delivers verified technical context, real-world design meaning of key specs, HTSSOP48 package layout guidance, functional alternatives with documented differences, and OEM supply support details - all grounded in Toshiba's Rev 3.1.A specification.

Technical Context

The TB67S101AFNG,EL implements a BiCD monolithic architecture with dual H-bridge output stages, each driven by low-R_DS(on) MOSFETs (0.49 Ω typ. high-side + low-side combined). Its ADMD current control dynamically selects fast/slow decay modes per chopper cycle based on real-time current error versus an adaptive threshold, minimizing ripple while optimizing efficiency.

Motor phase current is set via external VREF voltage (0–3.6 V) and sense resistors (RSA/RSB), with gain of 1/5.0 (typ.), enabling precise 1.18 A setting at VREF = 3.0 V and RS = 0.51 Ω. Chopping frequency (40–150 kHz) is externally adjustable via OSCM pin RC network, with typical 70 kHz at R = 5.1 kΩ and C = 270 pF.

Key Specifications

Pinout & Package

HTSSOP48-P-300-0.50 package: 48-pin thermally enhanced thin shrink small outline package with exposed pad (GND-connected), 0.50 mm pitch, 12.0 × 6.1 mm body size, 1.0 mm max height. Requires PCB GND thermal pad connection and strict layout for VM/GND/OUT traces to avoid short circuits or thermal runaway.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar bipolar stepping motor driver applications.

Compared with STSPIN820 and DRV8825, TB67S101AFNG,EL uniquely combines PHASE-in simplicity, ADMD adaptive decay, and 4.0 A capability in HTSSOP48 - making it optimal for industrial motion systems needing deterministic timing, high torque density, and robust fault handling without software overhead.

Availability

TB67S101AFNG,EL is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pump actuation, automated test equipment (ATE) stage control, and PCB assembly pick-and-place systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for TB67S101AFNG,EL 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 semiconductor solutions for industrial, automotive, and infrastructure applications, with expertise in BiCD process technology and motor control IP.

TB67S101AFNG,EL belongs to Toshiba's TB67S series of bipolar stepper drivers, engineered specifically for high-current, high-efficiency motion control in space-constrained industrial equipment where thermal resilience and deterministic microstepping are critical.

FAQ

What is the maximum continuous motor current supported by TB67S101AFNG,EL under standard PCB conditions?

TB67S101AFNG,EL supports up to 3.0 A continuous motor current when mounted on a JEDEC 4-layer board at Ta ≤ 85°C, per its Operation Ranges table. This limit ensures junction temperature stays below 120°C - well below the 150°C absolute maximum - even with 0.49 Ω ON-resistance and typical 24 V supply. Exceeding 3.0 A requires active cooling or derating per ambient temperature.

How does the Advanced Dynamic Mixed Decay (ADMD) function improve motor performance compared to fixed decay modes?

TB67S101AFNG,EL's ADMD continuously adapts decay mode per chopper cycle based on real-time current error versus a dynamic threshold, reducing average current ripple to <5% at 70 kHz. Unlike fixed slow/fast decay, ADMD minimizes torque variation at low speeds and suppresses resonance - critical for precision positioning in TB67S101AFNG,EL-based CNC and medical devices.

Can TB67S101AFNG,EL operate with a 3.3 V logic supply, and what are the input voltage thresholds?

Yes, TB67S101AFNG,EL accepts 3.3 V logic levels: VIN(H) ≥ 2.0 V (min) and VIN(L) ≤ 0.8 V (max) per its Electrical Specifications, with 100–300 mV hysteresis. This ensures reliable interface with 3.3 V FPGAs and microcontrollers without level shifters - confirmed in TB67S101AFNG,EL's Table 10.1 and Figure 6.1 equivalent circuit.

What thermal design considerations apply to the HTSSOP48 package of TB67S101AFNG,EL?

TB67S101AFNG,EL's HTSSOP48 package requires soldering the exposed pad directly to a large PCB GND copper area (≥200 mm²) for thermal conduction. All 11 GND pins must connect to this plane at a single point; VM and OUT traces need ≥0.5 mm width and isolation to prevent short circuits. Per Toshiba's note, improper layout risks permanent damage due to localized heating or latch-up.

How is motor current set on TB67S101AFNG,EL, and what is the relationship between VREF and output current?

TB67S101AFNG,EL sets motor current via VREF voltage applied to VREFA/VREFB pins and external sense resistors (RSA/RSB). The formula is I_out(max) = VREF × (1/5.0) / R_S. For example, 3.0 V on VREFA with 0.51 Ω RSA yields 1.18 A - a direct, analog method eliminating DACs or complex calibration in TB67S101AFNG,EL designs.