Toshiba Semiconductor and Storage TB6561NG,8

Overview

TB6561NG from Toshiba is a dual full-bridge DC motor driver IC integrating Bi-CMOS silicon monolithic technology, delivering 1.5 A peak output current per channel with 1.5 Ω typical ON-resistance (upper + lower transistors), 40 V absolute max supply voltage, and integrated PWM current control for brushed DC motor control in compact industrial actuators.

For engineers reviewing the TB6561NG datasheet, TB6561NG pinout, TB6561NG application, or TB6561NG equivalent, this page provides verified functional roles, thermal shutdown behavior at 160°C, CLD fault signaling, and direct PWM interface timing - all critical for motor control loop design, PCB layout validation, and overcurrent protection integration.

Technical Context

The TB6561NG implements two independent H-bridge channels (A and B), each with complementary MOSFET output stages controlled by IN1/IN2 logic inputs and PWM-modulated direction signals (PWMA/PWMB). It uses internal dead-time generation (500 ns typ.) to prevent shoot-through during switching transitions.

Its protection architecture includes per-channel overcurrent detection (2.5 A typ. threshold, 10 μs minimum pulse width), shared thermal shutdown (160°C activation, 40°C hysteresis), and CLD pin reporting of both fault conditions with automatic recovery - all operating within 10–36 V motor supply range and 5 V logic interface compliance.

Key Specifications

Pinout & Package

Package: SDIP-24-P-300-1.78 (24-pin shrink dual in-line plastic, 300 mil width, 1.78 mm thickness, 1.62 g typical weight).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TB6612FNG and DRV8876N, the TB6561NG offers unique value in cost-sensitive industrial designs needing integrated 5 V regulation, simple GPIO control, and proven reliability in long-lifecycle embedded systems - without demanding advanced communication or ultra-low R_DS(on).

Availability

TB6561NG is available at Aetrix Electronics and suitable for industrial actuators, automated valves, medical pump modules, robotic joint controllers, and HVAC damper systems requiring stable component supply across multi-year production programs.

Supply support for TB6561NG 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 and manufactures high-reliability semiconductor solutions for industrial, automotive, and consumer applications, with deep expertise in power management and motor control ICs.

The TB6561NG belongs to Toshiba's Bi-CMOS motor driver product line, engineered specifically for cost-effective, thermally robust dual H-bridge control of brushed DC motors in space-constrained industrial equipment.

FAQ

What is the maximum continuous output current rating for TB6561NG?

The TB6561NG is rated for 1.5 A peak output current per channel under specified thermal conditions. Continuous current depends on PCB copper area, ambient temperature, and heatsinking - with 2.5 W max power dissipation on a 50 mm × 50 mm × 1.6 mm board (50% Cu). At 25°C ambient and proper layout, TB6561NG supports ~1.0 A continuous per channel without exceeding 150°C junction temperature. Always verify thermal performance in final system configuration.

How does the CLD pin function on TB6561NG?

The CLD pin on TB6561NG is an open-drain fault indicator that goes high during overcurrent detection (2.5 A typ.) or thermal shutdown (160°C). It automatically returns low once the fault condition clears - e.g., current drops below threshold or junction cools below 120°C. The TB6561NG CLD pin requires an external pull-up resistor (typically 10 kΩ to 5 V) and supports direct connection to MCU interrupt inputs for real-time fault response without polling.

Can TB6561NG drive two independent motors simultaneously?

Yes, TB6561NG integrates two fully independent full-bridge channels (A and B), each with dedicated IN1/IN2 control inputs, PWM direction pins (PWMA/PWMB), and output pairs (OUT1A/OUT2A and OUT1B/OUT2B). This allows simultaneous bidirectional control of two brushed DC motors - for example, left/right wheel drives in differential-drive robots or dual-axis positioning stages - with no shared timing or current limitations between channels.

What is the purpose of the Vreg pin on TB6561NG?

The Vreg pin on TB6561NG delivers a regulated 5.0 V ±2.5% output at up to 1 mA, intended to power external logic such as microcontroller GPIOs, level shifters, or sensor interfaces. It must be decoupled with a 0.1 μF ceramic capacitor to S-GND, placed as close as possible to the pin. This eliminates the need for a separate LDO in space-constrained designs - a key differentiator of the TB6561NG versus many competing dual H-bridge drivers.

Does TB6561NG require external dead-time circuitry for PWM operation?

No, TB6561NG incorporates internal dead-time generation of 500 ns (typ.) between upper and lower transistor switching transitions. This prevents shoot-through current in both direction changes (CW ↔ CCW) and mode transitions (e.g., CW ↔ short-brake), eliminating the need for external timing components or complex gate-drive sequencing. The TB6561NG achieves synchronous rectification and high efficiency without external dead-time management.