Toshiba Semiconductor and Storage TB6562ANG,8

Overview

TB6562ANG,8 from Toshiba is a dual full-bridge Bi-CMOS stepping motor driver IC for 2-phase bipolar stepper motors, integrating low-ON-resistance DMOS output transistors (1.5 Ω typ.), PWM current control, and thermal shutdown. It delivers up to 1.5 A peak output current per channel, operates from 10 V to 34 V supply, and supports 2-phase/1–2-phase/W 1–2-phase excitation modes - used in precision motion control for industrial automation and CNC positioning systems.

For engineers reviewing the TB6562ANG,8 datasheet, TB6562ANG,8 pinout, TB6562ANG,8 application, or TB6562ANG,8 equivalent, key selection considerations include its SDIP24 package footprint, integrated current-sense resistor interface (RSA/RSB), 110 kHz typical oscillator frequency, and built-in overcurrent protection with 2.5 A threshold (typ.) - critical for reliable open-loop stepper actuation without external current sensing circuitry.

Technical Context

The TB6562ANG,8 implements a synchronous rectification PWM current regulator with internal 300 ns dead-time generation to prevent shoot-through, enabling high-efficiency drive without external timing components. Its decoder logic interprets Phase A/B and X1/X2 inputs to select excitation mode (2-phase, 1–2-phase, or W 1–2-phase) and set current levels at 100%, 66.7%, 33.3%, or 0% via Vref scaling (1/10, 1/15, 1/30).

It integrates independent thermal shutdown (160°C typ., 40°C hysteresis) and per-transistor overcurrent detection (ILIM = 2.5 A typ.), with automatic recovery after 50 μs off-time. The Vreg pin supplies regulated 5 V (4.75–5.25 V) for logic-level interfacing, and OSC pin sets triangular-wave frequency (88–132 kHz with 4700 pF capacitor).

Key Specifications

Pinout & Package

Package: SDIP24-P-300-1.78 (24-pin shrink dual in-line plastic, 300 mil width, 1.78 mm pitch). Surface-mount compatible with through-hole footprint; 1.62 g typical weight.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6600HG and DRV8825, the TB6562ANG,8 uniquely combines integrated 5 V regulation, W 1–2-phase excitation for coarse microstepping, and SDIP24 through-hole compatibility - making it optimal for space-constrained industrial controllers where BOM reduction and ease of prototyping are prioritized over maximum current or finest microstep resolution.

Availability

TB6562ANG,8 is available at Aetrix Electronics and suitable for industrial CNC positioning, automated optical inspection, lab automation pipetting, medical imaging sample handling, and precision motion control systems requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for TB6562ANG,8 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 TB6562ANG,8 belongs to Toshiba's stepper motor driver product line, engineered specifically for cost-effective, robust open-loop motion control in factory automation equipment where thermal resilience, integrated protection, and simplified system design are essential.

FAQ

What is the maximum continuous output current supported by the TB6562ANG,8?

The TB6562ANG,8 supports up to 1.5 A peak output current per channel under specified thermal conditions (Ta ≤ 85°C, adequate PCB copper area). Continuous current capability depends on heatsinking: with a 50 mm × 50 mm × 1.6 mm board (50% Cu), PD is limited to 2.5 W. At 1.5 A and 1.5 Ω total ON-resistance, power dissipation is ~3.4 W - thus derating to ~1.2 A is recommended for sustained operation without forced cooling. The TB6562ANG,8 datasheet specifies IO(peak) = 1.5 A as the absolute maximum rating.

Does the TB6562ANG,8 require external current-sense resistors?

Yes, the TB6562ANG,8 requires external low-value current-sense resistors connected between RSA/RSB pins and GND to implement PWM current regulation. Typical values range from 0.1 Ω to 0.5 Ω depending on desired full-scale current and Vref setting. For example, with Vref = 1.0 V and X1=X2=L (1/10 scaling), a 0.25 Ω resistor yields 1.0 A full-scale current (IO = Vref × 0.1 / RS). The TB6562ANG,8 does not include internal sense resistors - they must be placed externally per channel.

Can the TB6562ANG,8 operate with a 5 V logic supply only?

No, the TB6562ANG,8 cannot operate with only a 5 V logic supply. Its VCC pins require 10 V to 34 V for motor drive operation; the internal DMOS output stage is not rated for 5 V rail operation. However, the Vreg pin provides a regulated 5 V output (4.75–5.25 V) for powering external logic - meaning only one higher-voltage supply (e.g., 24 V) is needed, eliminating the need for a separate 5 V rail. The TB6562ANG,8 logic inputs (Phase, X1/X2, SB) accept 0 V/5 V signals compatible with this Vreg output.

What excitation modes does the TB6562ANG,8 support, and how are they selected?

The TB6562ANG,8 supports three excitation modes: 2-phase (full-step), 1–2-phase (half-step), and W 1–2-phase (7-step quasi-microstepping). Mode selection is determined by the logic states of Phase A/B and X1A/X2A/X1B/X2B pins. For example, W 1–2-phase requires specific alternating patterns across X1/X2 to generate 33.3%/66.7%/100% current levels. All modes are implemented in hardware via the internal decoder - no firmware sequencing is required. The TB6562ANG,8 truth tables in the datasheet define exact input combinations for each mode.

How does the thermal shutdown function in the TB6562ANG,8 respond to overheating?

The TB6562ANG,8 thermal shutdown circuit disables all output transistors when junction temperature reaches 160°C (typ.), with 40°C hysteresis - meaning outputs remain off until temperature drops to ~120°C before automatic recovery. This behavior is independent of input control signals; SB, Phase, and X1/X2 states are ignored during shutdown. The TB6562ANG,8 does not latch off permanently - it cycles on/off if overheating persists. Designers must ensure adequate copper area (e.g., 50 mm² per VCC/GND pin) and airflow to avoid repeated cycling, which may degrade long-term reliability.