Toshiba Semiconductor and Storage TB67H301FTG,EL

Overview

TB67H301FTG from Toshiba is a full-bridge DC motor driver IC with Bi-CDMOS silicon monolithic construction, 40 V max power supply voltage, 3 A peak output current, and integrated PWM constant-current control. It drives brushed DC motors in robotics, industrial actuators, and automated door systems using CW/CCW/Short Brake/Stop modes.

For engineers reviewing the TB67H301FTG datasheet, TB67H301FTG pinout, TB67H301FTG application, or TB67H301FTG equivalent, key selection criteria include programmable overcurrent detection (via NISD/PISD), thermal shutdown recovery at 130°C, dead-time–protected shoot-through prevention, and ROSC-controlled 8–12 MHz oscillator for precise PWM timing.

Technical Context

The TB67H301FTG implements dual-channel DMOS H-bridge output stages with independent upper- and lower-MOSFET control, enabling four discrete drive states via IN1/IN2 logic. Its internal dead time generator prevents simultaneous conduction, eliminating external timing components.

It integrates three protection circuits-overcurrent shutdown (ISD) with programmable TON/TOFF timing, thermal shutdown (TSD) with 40°C hysteresis, and undervoltage lockout (LVD) for both VM (4.0 V trip) and VCC (2.7 V trip)-all signaled via open-drain ALERT output.

Key Specifications

Pinout & Package

P-WQFN24-0404-0.50-004 package: 4.0 mm × 4.0 mm, 0.50 mm pitch, thermally enhanced exposed pad (electrically connected to PGND/SGND) requiring PCB ground plane connection for heat dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar full-bridge DC motor driver applications.

Compared with DRV8876PWPR and MP6532GQZ, the TB67H301FTG uniquely combines programmable overcurrent timing (TON/TOFF), ROSC-controlled PWM constant-current chopping, and dual-domain LVD - making it optimal for industrial motion systems demanding configurable protection and stable torque under variable supply and thermal conditions.

Availability

TB67H301FTG is available at Aetrix Electronics and suitable for industrial actuators, robotic joint drivers, automated door systems, and medical infusion pumps requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TB67H301FTG 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 consumer applications, with emphasis on power efficiency and system integration.

The TB67H301FTG belongs to Toshiba's Bi-CDMOS full-bridge motor driver family, engineered for precision DC motor control in space-constrained, thermally demanding environments such as factory automation and portable medical equipment.

FAQ

What is the maximum continuous output current supported by the TB67H301FTG?

The TB67H301FTG supports 1 A average output current under typical PCB thermal conditions (4-layer FR4, 74 mm × 74 mm). Its 3 A peak rating applies only for short-duration pulses - sustained current must be limited to avoid exceeding the 150°C absolute maximum junction temperature. Thermal design, including proper grounding of the exposed pad, directly determines achievable continuous current.

How does the TB67H301FTG implement PWM constant-current control?

The TB67H301FTG uses peak current detection: the IR pin monitors voltage across an external sense resistor (RS/GND), comparing it to VREF. When VIR reaches VREF, the device enters Discharge (short-brake) mode for a ROSC-timed duration (e.g., 16 μs at 10 MHz), then returns to Charge mode. This cycle maintains precise peak current, with average current slightly below VREF/R due to coil dynamics.

Can the TB67H301FTG be used without connecting the ROSC pin?

No - the ROSC pin must be connected to a resistor (typically 24 kΩ) to establish the internal oscillator frequency. Without ROSC, PWM constant-current control, short-brake timing, and minimum charge width become undefined. The datasheet specifies no internal default or fallback oscillator; omission will cause malfunction in current-regulated operation.

What happens to the ALERT pin during thermal shutdown of the TB67H301FTG?

During thermal shutdown (TSD), the ALERT pin transitions from Low (normal operation) to High-impedance (Hi-Z) state. This differs from overcurrent (ISD) or undervoltage (LVD) faults, where ALERT actively pulls high. The Hi-Z state on ALERT during TSD allows system-level differentiation of fault types when combined with external pull-up and monitoring logic.

Is the TB67H301FTG compatible with 3.3 V logic inputs?

Yes - the TB67H301FTG accepts 3.3 V logic levels on IN1, IN2, and STBY. Its input high threshold (VINH) is 2.0 V min, and input low threshold (VINL) is 0.7 V max, providing sufficient margin for 3.3 V CMOS signaling. However, VCC must still be supplied at 4.5–5.5 V when using constant-current PWM mode, or 3.0–5.5 V otherwise.