Toshiba Semiconductor and Storage TB67S101ANG

Overview

TB67S101ANG from Toshiba Electronic Devices & Storage Corporation is a phase-controlled, PWM chopper-based bipolar stepping motor driver IC rated for 50 V and 4.0 A peak output current. It implements Advanced Dynamic Mixed Decay (ADMD) current control, supports full/half/quarter-step resolution, and features integrated thermal shutdown (TSD), over-current shutdown (ISD), and power-on reset (POR) - deployed in precision motion control systems for industrial automation and CNC positioning.

For engineers reviewing the TB67S101ANG datasheet, TB67S101ANG pinout, TB67S101ANG application, or TB67S101ANG equivalent, key selection considerations include its SDIP24 package thermal limitations, external OSCM frequency tuning via RC network, RS-sense-based current setting (VREF × 0.2 / R_S), and absence of overvoltage detection - requiring external clamping for back-EMF protection.

Technical Context

The TB67S101ANG uses a BiCD monolithic process to integrate dual H-bridge predrivers and MOSFET output stages with on-resistance of 0.49 Ω (typ., high + low side). Its ADMD decay algorithm dynamically switches between fast and slow decay modes based on real-time current error relative to the Advanced Dynamic Mixed Decay threshold (ADMDth), minimizing ripple while optimizing efficiency.

Motor current is regulated via external sense resistors (RSA, RSB) and reference voltages (VREFA, VREFB), with gain of 1/5.0 (typ.). Chopping frequency (f_chop) is derived from an externally tuned oscillator (OSCM) at f_OSCM/16, typically 70 kHz when configured with 270 pF and 5.1 kΩ - enabling precise trade-off between current smoothness and internal switching loss.

Key Specifications

Pinout & Package

Package: P-SDIP24-0723-1.78-001 - 24-pin staggered dual in-line plastic package with 1.78 mm body height, optimized for heat transfer via exposed pad (not electrically connected) and multiple GND pins for low-inductance grounding.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN220 and MP6500, the TB67S101ANG offers higher voltage/current capability (50 V/4.0 A), true quarter-step resolution with PHASE control, and ADMD for superior microstepping fidelity - making it optimal for industrial-grade motion systems demanding thermal robustness and fine-grained current regulation.

Availability

TB67S101ANG is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pump actuation, and automated optical inspection systems requiring stable component supply, long-term lifecycle support, and traceable sourcing from authorized channels.

Supply support for TB67S101ANG 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 power management and motor control ICs for industrial, automotive, and infrastructure applications, with over 50 years of semiconductor expertise.

The TB67S series targets precision motion control in factory automation and medical equipment, emphasizing thermal resilience, integrated protection, and flexible microstepping - addressing design needs where discrete driver solutions lack integration or reliability.

FAQ

What is the maximum safe operating voltage for TB67S101ANG?

The TB67S101ANG has an absolute maximum VM rating of 50 V, with recommended operating range of 10–47 V. Since TB67S101ANG does not have overvoltage detection circuitry, exceeding 50 V - even transiently - risks permanent damage. Designers must implement external TVS diodes or clamping circuits to suppress back-EMF spikes, especially in high-inductance motor applications.

How is motor current set on TB67S101ANG?

Motor current on TB67S101ANG is set using the formula I_OUT = VREF × (1/5.0) / R_S, where VREF is applied to VREFA/VREFB pins (0–3.6 V range) and R_S is the external current-sense resistor (e.g., 0.51 Ω). For example, with VREF = 3.0 V and R_S = 0.51 Ω, TB67S101ANG delivers 1.18 A. Accuracy is ±5 % across channels.

Does TB67S101ANG support microstepping beyond quarter-step?

No - TB67S101ANG natively supports only full-step, half-step, and quarter-step resolution via PHASE/INA/INB logic inputs. It does not implement sine-wave interpolation or higher subdivision (e.g., 1/8, 1/16, 1/32). The TB67S101ANG block diagram and timing charts confirm exactly three discrete step modes, with quarter-step providing 90° phasor increments.

What thermal derating applies to TB67S101ANG in PCB-mounted use?

When mounted on a 4-layer PCB with R_th(j-a) = 50 °C/W, TB67S101ANG's power dissipation must be derated by 20 mW/°C above 25 °C ambient. At 60 °C ambient, maximum allowed PD drops from 2.5 W to 1.8 W. This directly limits sustainable output current - e.g., at 24 V and 0.49 Ω R_DS(on), continuous 2.0 A operation requires active airflow or copper pour enhancements.

Can TB67S101ANG be used with 3.3 V logic controllers?

Yes - TB67S101ANG accepts logic inputs from 3.3 V microcontrollers: V_IN(H) minimum is 2.0 V and V_IN(L) maximum is 0.8 V, with 100–300 mV hysteresis. However, VCC must be supplied at 4.75–5.25 V (regulated 5 V) as it powers internal circuitry and the VREF regulator; it is not logic-supply referenced.