Toshiba Semiconductor and Storage TC78H610FNG,EL

Overview

TC78H610FNG from Toshiba Electronic Devices & Storage Corporation is a dual H-bridge driver IC for brushed DC and bipolar stepping motors, featuring integrated DMOS output transistors, 1.0 A absolute maximum output current per channel, 1.2 Ω typical total ON-resistance (high-side + low-side), and built-in protection circuits including overcurrent detection (ISD), thermal shutdown (TSD), and under-voltage lockout (UVLO). It operates with motor supply VM = 2.5–15 V and logic supply VCC = 2.7–5.5 V.

For engineers reviewing the TC78H610FNG datasheet, TC78H610FNG pinout, TC78H610FNG application, or TC78H610FNG equivalent, this device supports precise bidirectional motor control in space-constrained embedded systems requiring robust fault protection, fast PWM response (up to 500 kHz), and simplified interface via four logic-level inputs per bridge.

Technical Context

The TC78H610FNG implements two independent full H-bridge drivers with internal cross-conduction prevention and 300 ns typical dead-time insertion between high- and low-side switching transitions. Each bridge accepts complementary logic-level inputs (IN1x/IN2x) to control forward, reverse, brake, and stop modes without external timing components.

It integrates internal 200 kΩ pull-down resistors on all input pins (/STBY, IN1A–IN2B), supports standby mode with <1 μA quiescent current, and features synchronous rectification enabled by its internally timed dead-time - eliminating need for external off-time generation while maintaining efficiency during PWM operation.

Key Specifications

Pinout & Package

TC78H610FNG is housed in a compact SSOP16 package (0.65 mm pitch, 5.0 × 6.4 mm footprint), optimized for automated assembly and thermal performance on standard FR-4 PCBs. The package includes three GND pins (pins 11, 14, 16) for low-impedance return paths and dedicated power routing for VM (pin 9) and VCC (pin 5).

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 DRV8833, the TC78H610FNG offers balanced integration - combining robust protection (ISD/TSD/UVLO), moderate R_ON, and SSOP16 manufacturability - making it optimal for industrial and medical designs requiring verified fault resilience without added component count.

Availability

TC78H610FNG is available at Aetrix Electronics and suitable for robotics actuation, industrial valve control, medical pump systems, and consumer appliance motor control requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.

Supply support for TC78H610FNG 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 is a global semiconductor manufacturer specializing in power management, motor drivers, and logic ICs for industrial, automotive, and consumer applications.

The TC78H610FNG belongs to Toshiba's CDMOS H-bridge driver family, designed specifically for compact, protected, and easy-to-integrate motor control in cost-sensitive embedded systems operating from 2.5–15 V supplies.

FAQ

What is the maximum continuous output current supported by the TC78H610FNG?

The TC78H610FNG has an absolute maximum output current rating of 1.0 A per channel. In practical operation at Ta = 25°C with adequate PCB copper area (≥40% on 50 mm × 50 mm × 1.6 mm board), the recommended continuous current is 0.8 A to maintain junction temperature within safe limits. Derating is required at higher ambient temperatures or with reduced thermal mass.

Does the TC78H610FNG support PWM speed control, and what is its maximum frequency?

Yes, the TC78H610FNG supports PWM speed control on both H-bridges. Its input logic can accept PWM signals up to 500 kHz under 50% duty cycle conditions. This allows fine-grained speed resolution and effective acoustic noise suppression in motor applications without compromising switching integrity.

How does the /STBY pin function in the TC78H610FNG, and what power savings does it provide?

The /STBY pin is an active-low global standby enable. When pulled low, it disables both H-bridges and reduces total supply current to less than 1 μA. This feature makes the TC78H610FNG suitable for battery-powered devices requiring extended sleep periods - for example, remote-controlled appliances or portable medical instruments where standby current directly impacts battery life.

What protection functions are built into the TC78H610FNG, and how do they respond to faults?

The TC78H610FNG integrates overcurrent detection (ISD), thermal shutdown (TSD), and under-voltage lockout (UVLO). During ISD (triggered at ~1.7 A), TSD (>170°C), or UVLO (VCC < 2.2 V or VM < 2.0 V), all outputs turn off and the IC enters stop mode (equivalent to IN1x/IN2x = L). Recovery occurs automatically after fault removal - e.g., TSD releases when junction cools by ~40°C.

Can the TC78H610FNG drive a bipolar stepping motor, and what interface configuration is required?

Yes, the TC78H610FNG can drive a 4-wire bipolar stepping motor by connecting AO1/AO2 to one winding and BO1/BO2 to the other. Full-step or half-step sequencing is achieved by toggling IN1A/IN2A and IN1B/IN2B in coordinated patterns (e.g., H/L → L/H for forward rotation). No external diodes or current-sensing resistors are needed due to integrated protection and synchronous rectification.