Toshiba Semiconductor and Storage TB6600FG

Overview

TB6600FG from Toshiba is a PWM chopper-type single-chip bipolar sinusoidal micro-step stepping motor driver IC designed for precision motion control in industrial automation and CNC systems. It delivers 4.0 A continuous output current per phase, supports 1/16 micro-stepping resolution, operates up to 42 V supply voltage, and integrates thermal shutdown, over-current detection, and under-voltage lockout for robust motor drive protection.

For engineers reviewing the TB6600FG datasheet, TB6600FG pinout, TB6600FG application, or TB6600FG equivalent, this page provides verified technical context, validated pin functions, confirmed micro-stepping excitation modes (1/1 to 1/16), real-world design meaning of ALERT/MO monitoring outputs, and selection guidance for comparable bipolar stepper drivers with integrated current control.

Technical Context

The TB6600FG implements a dual H-bridge output stage with eight power MOSFETs, using peak-current PWM chopping at 20–60 kHz (configurable via external OSC resistor). Its internal current selector circuit enables precise sinusoidal current waveform generation across five excitation modes - including 2-phase, 1-2-phase, W1-2-phase, 2W1-2-phase, and 4W1-2-phase - each with defined initial phase currents and MO-synchronized electrical angle reporting.

Control logic includes dedicated ENABLE and RESET inputs, M1–M3 mode-select pins, CW/CCW direction input, and TQ/Vref-based torque scaling. Built-in protection circuits - TSD (160°C typ.), ISD (6.5 A typ.), and UVLO (5.5 V typ.) - operate independently and assert low-level ALERT output, while MO provides open-drain electrical angle timing signals synchronized to micro-step transitions.

Key Specifications

Pinout & Package

Package: HQFP64-P-1010-0.50 (64-pin heat-sinked quad flat package, 10 mm × 10 mm, 0.5 mm pitch, exposed thermal pad).

Key Features

Applications

Equivalent & Alternatives

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

Compared with STSPIN820 and MP6500, the TB6600FG uniquely combines hardware-configurable micro-stepping (1/1–1/16), dual-monitor outputs (ALERT + MO), and 4.0 A continuous drive in a single-package solution - making it optimal for industrial systems requiring deterministic timing, field-serviceable diagnostics, and minimal MCU overhead.

Availability

TB6600FG is available at Aetrix Electronics and suitable for industrial CNC routers, automated packaging machines, lab automation pipetting systems, and 3D printer motion controllers requiring stable component supply and long-term production continuity.

Supply support for TB6600FG 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 emphasis on motor control, power management, and optical devices.

The TB6600FG belongs to Toshiba's BiCD monolithic stepping motor driver family, engineered specifically for high-current, low-vibration bipolar stepper control in factory automation and precision equipment where hardware-based micro-stepping and integrated protection are critical.

FAQ

What is the maximum continuous output current supported by the TB6600FG?

The TB6600FG supports 4.0 A continuous output current per phase under operating conditions (Ta = −30 to 85°C, Vcc ≤ 42 V). This value reflects thermal limits at board-level mounting; absolute maximum peak current is 4.5 A, but sustained operation above 4.0 A requires active cooling or derating per the PD vs. Ta curve in the datasheet. The TB6600FG achieves this with 0.4 Ω typical total ON resistance across its dual H-bridge output stage.

How does the TB6600FG implement micro-stepping without external DAC or MCU interpolation?

The TB6600FG generates sinusoidal current waveforms internally using its integrated current selector circuit and PWM chopper architecture. By configuring M1/M2/M3 pins, users select one of five excitation modes (1/1 to 1/16 step), and the IC automatically sequences phase currents - e.g., 100%/0%, 71%/71%, or 92%/38% - based on internal lookup tables synchronized to CLK edges. No external DAC, current DAC, or software interpolation is required for TB6600FG operation.

What is the function of the MO pin on the TB6600FG, and how is it used in practice?

The MO pin on the TB6600FG is an open-drain electrical angle monitor output that pulses low once per micro-step transition, synchronized to the internal current waveform zero-crossing points. In practice, it is pulled up to Vreg (5 V) and used by host controllers to verify step execution timing, align with encoderless commutation algorithms, or trigger auxiliary actions (e.g., laser firing in CNC engraving). Its 1 mA sink capability ensures compatibility with standard logic inputs without additional level-shifting for TB6600FG systems.

Can the TB6600FG operate safely if the power supply voltage exceeds 42 V?

No - the TB6600FG has a strict 42 V maximum operating supply voltage (Vcc). While its absolute maximum rating is 50 V, exceeding 42 V risks abnormal operation, premature thermal shutdown, or permanent damage due to increased power dissipation and gate oxide stress. The datasheet explicitly states: "In case of exceeding the power supply voltage of 42 V … the IC will not operate normally." For 48 V systems, use external DC-DC regulation to deliver ≤42 V to the TB6600FG Vcc pins.

How does the ALERT output behave during thermal shutdown (TSD) and over-current (ISD) events?

During either TSD or ISD events, the TB6600FG asserts ALERT low (≤0.5 V at 1 mA sink) and turns off all output power MOSFETs immediately. The ALERT signal remains low until recovery - which depends on Latch/Auto pin state: if Latch/Auto = L, recovery requires ENABLE toggling (H→L→H, ≥0.3 ms low time); if Latch/Auto = H, recovery is automatic after junction temperature falls to ~90°C. ALERT behavior is identical for both faults; distinction requires monitoring system context or external current/voltage sensors alongside TB6600FG operation.