Toshiba Semiconductor and Storage TB67S102AFNG,EL

Overview

TB67S102AFNG,EL from Toshiba is a clock-in controlled bipolar stepping motor driver IC fabricated in BiCD process, delivering 50 V/4.0 A rating, PWM chopper-based constant-current drive, full/half/quarter-step resolution, and integrated Advanced Dynamic Mixed Decay (ADMD) current control for precision motion systems in industrial automation and CNC equipment.

For engineers reviewing the TB67S102AFNG,EL datasheet, TB67S102AFNG,EL pinout, TB67S102AFNG,EL application, or TB67S102AFNG,EL equivalent, key selection criteria include its HTSSOP48 package thermal performance, dual-channel 1.5 A typical output current (3.0 A max), 0.49 Ω typical high-side + low-side ON-resistance, ADMD decay mode behavior, and OSCM-set chopper frequency range of 40–150 kHz.

Technical Context

The TB67S102AFNG,EL implements a clock-driven step sequencer with CW/CCW direction control and DMODE1/DMODE2-configurable resolution (full/half/quarter). Its internal oscillator (OSCM) sets chopper frequency via external RC network, with fchop = fOSCM / 16 - typically 70 kHz at 1.12 MHz OSCM.

Current regulation uses dual RS-sense inputs (RSA/RSB) and VREFA/VREFB reference voltage inputs, enabling independent channel current setting via Iout(max) = Vref × (1/5.0) / R_S. Protection includes thermal shutdown (TSD at 145–175°C), overcurrent shutdown (ISD at 4.1–5.7 A), and power-on reset (POR).

Key Specifications

Pinout & Package

HTSSOP48-P-300-0.50 package: 48-pin thermally enhanced thin shrink small outline package with exposed pad (mounted to PCB GND for heat dissipation); 0.5 mm pitch, 7.0 × 7.0 mm body size, 0.21 g typical weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN820TR and MP6500GQZ, TB67S102AFNG,EL delivers superior thermal headroom (1.3 W PD), hardware-based clock-step simplicity, and unique MO angle monitoring - making it optimal for deterministic, embedded motion control without host processor overhead.

Availability

TB67S102AFNG,EL is available at Aetrix Electronics and suitable for industrial CNC positioning, medical infusion pump drive, automated optical inspection stages, and lab automation robotic arm joints requiring stable component supply and long-term production continuity.

Supply support for TB67S102AFNG,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 analog and power ICs for industrial, automotive, and consumer applications, with deep expertise in BiCD process technology and motor control integration.

TB67S102AFNG,EL belongs to Toshiba's TB67S series of integrated bipolar stepper drivers, engineered specifically for high-voltage, high-current motion control in space- and thermally-constrained industrial equipment.

FAQ

What is the maximum continuous output current supported by TB67S102AFNG,EL in its HTSSOP48 package?

TB67S102AFNG,EL supports 1.5 A typical continuous output current per channel under standard conditions (Ta = 25°C, 2-layer PCB, 2 oz copper). The absolute maximum rating is 4.0 A, but thermal limits in the HTSSOP48 package constrain practical operation to ≤3.0 A with aggressive heatsinking. Derating is required above 60°C ambient temperature per the datasheet's thermal resistance (θ_JA) curve.

How does the OSCM pin configure chopper frequency in TB67S102AFNG,EL?

The OSCM pin in TB67S102AFNG,EL connects to an external RC network (e.g., 5.1 kΩ resistor + 270 pF capacitor) to set the internal oscillator frequency (fOSCM), which is then divided by 16 to determine chopper frequency (fchop = fOSCM / 16). With typical values, fOSCM ≈ 1.12 MHz yields fchop ≈ 70 kHz - balancing current ripple suppression against switching losses and thermal rise.

Does TB67S102AFNG,EL require external current sense resistors, and how are they connected?

Yes, TB67S102AFNG,EL requires two external low-value current sense resistors - one for each motor phase - connected between the RSA/RSB pins and GND. These resistors (e.g., 0.51 Ω) convert motor current into a voltage sensed by the IC's internal comparators. The peak current is calculated as Iout(max) = Vref × (1/5.0) / R_S, where Vref is applied to VREFA/VREFB pins.

What protection features are built into TB67S102AFNG,EL, and how do they respond to faults?

TB67S102AFNG,EL integrates thermal shutdown (TSD), overcurrent shutdown (ISD), and power-on reset (POR). TSD triggers at 145–175°C junction temperature, forcing standby mode until VM is cycled or DMODE enters standby. ISD activates at 4.1–5.7 A output current, latching off outputs until POR or DMODE reset. Both functions prevent catastrophic failure but require external fusing for sustained fault conditions.

Can TB67S102AFNG,EL operate with a 3.3 V logic supply, or does it require 5 V?

TB67S102AFNG,EL accepts 3.3 V logic inputs reliably: its VIN(H) threshold is 2.0 V min and VIN(L) is 0.8 V max, fully compatible with standard 3.3 V CMOS outputs. The internal VCC regulator generates a stable 5.0 V ±2.5% rail for internal logic - no external 5 V supply is needed. However, VCC pin must be decoupled with a 1 µF ceramic capacitor to GND.