Toshiba Semiconductor and Storage TB67S213FTAG,EL

Overview

TB67S213FTAG from Toshiba is a PWM-controlled, phase-input bipolar stepping motor driver IC rated for 40 V and 2.5 A peak output current. It integrates dual H-bridge outputs, on-chip VCC regulator, mixed-decay current control, and comprehensive protection circuits (TSD, ISD, POR). It supports full/half/quarter-step resolution and operates with a single VM supply in industrial motion control systems.

For engineers reviewing the TB67S213FTAG datasheet, TB67S213FTAG pinout, TB67S213FTAG application, or TB67S213FTAG equivalent, key selection considerations include its 36-pin WQFN package, 100 kHz PWM chopping frequency range, ±1.5 V RS pin voltage tolerance, 0.53 Ω typical R_DS(on) per half-bridge, and mixed-decay timing fixed at 37.5% of f_chop.

Technical Context

The TB67S213FTAG implements a dedicated step decoder with PHASE_A/PHASE_B inputs and 2-bit resolution control (IN_A1/IN_A2, IN_B1/IN_B2) to configure full/half/quarter-step modes. Its torque control uses a 3-bit D/A converter for angle control and adjustable current thresholds via external VREF_A/VREF_B pins.

Current regulation employs PWM feedback using external sense resistors (RS_A/RS_B) and an internal oscillator (f_OSC = 1.36–1.84 MHz, set by OSCM pin), with chopper frequency derived as f_chop = f_OSC/16. Mixed-decay operation combines slow and fast decay phases, with 37.5% of each cycle allocated to mixed mode before transitioning to fast decay upon current threshold crossing.

Key Specifications

Pinout & Package

Package: P-WQFN36-0606-0.50-002 - 6 mm × 6 mm, 0.5 mm pitch, exposed thermal pad requiring solder connection to PCB ground plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN220TR and DRV8825PWPR, the TB67S213FTAG uniquely balances single-supply simplicity, mixed-decay torque smoothing, and compact 6×6 mm QFN packaging-making it optimal for thermally constrained industrial motion systems needing deterministic 2.0 A performance without microcontroller-based decay management.

Availability

TB67S213FTAG is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pump drive, automated laboratory equipment, and 3D printer extruder control requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TB67S213FTAG 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 automotive, industrial, and consumer applications, with emphasis on power efficiency and functional safety.

The TB67S213FTAG belongs to Toshiba's BiCD stepping motor driver family, engineered specifically for cost-sensitive, thermally demanding motion control systems requiring integrated protection and minimal external components.

FAQ

What is the maximum continuous motor current supported by the TB67S213FTAG?

The TB67S213FTAG has an absolute maximum output current rating of 2.5 A, but the recommended continuous operating limit is 2.0 A. This derating accounts for thermal dissipation constraints-exceeding 2.0 A risks triggering thermal shutdown (TSD) unless PCB copper area, airflow, and ambient temperature are rigorously controlled. The datasheet specifies that actual usable current must be calculated based on junction temperature rise, with Tj(max) limited to 120°C for reliable operation.

How does the TB67S213FTAG implement mixed-decay current control?

The TB67S213FTAG fixes mixed-decay timing at 37.5% of each chopper cycle (f_chop), automatically transitioning to fast decay after that interval if the motor current remains above the VREF-set threshold. This behavior is implemented entirely in hardware-no register writes or firmware configuration are needed. The TB67S213FTAG's block diagram confirms this is handled by the "Output Control (Mixed Decay Control)" module, which sequences charge, slow decay, and fast decay phases based on real-time current comparison.

Can the TB67S213FTAG operate without a separate logic supply voltage?

Yes, the TB67S213FTAG can operate with only the VM motor supply (10–35 V) thanks to its integrated VCC regulator. Pin 25 (VCC) is an internal regulator monitor-not an input-and the IC generates its own 5 V logic rail internally. This eliminates the need for an external 5 V supply, simplifying power architecture in space- or cost-constrained designs. However, VCC must still be decoupled with a 0.1 µF capacitor close to the pin.

What are the critical PCB layout requirements for the TB67S213FTAG?

Three layout rules are mandatory for reliable TB67S213FTAG operation: (1) The exposed thermal pad (pin 29 GND) must be soldered to a solid ground plane with ≥4 thermal vias; (2) All GND pins (pins 4, 10, 13, 15, 18, 29) must connect to the same ground plane at a single point to prevent ground loops; (3) VM, OUT_A±, and OUT_B± traces must be wide (>1.5 mm), short, and symmetric to minimize inductance and prevent shoot-through during switching transitions.

How do I calculate the current-sense resistor value for a target motor current using the TB67S213FTAG?

Use the formula R_RS = (VREF / 5) / I_OUT, where VREF is the voltage applied to VREF_A or VREF_B (e.g., 3.0 V), 5 is the fixed gain, and I_OUT is the desired peak phase current. For example, to set 1.8 A with 3.0 V on VREF_A: R_RS = (3.0 / 5) / 1.8 = 0.33 Ω. The resistor must also handle ≥1.1 W power dissipation (I²R = 1.8² × 0.33). The TB67S213FTAG datasheet confirms this calculation in Section 15.