motor-drivers

TC78H621

Full part number: TC78H621FNG

Key datasheet specifications and the closest alternatives, ranked by parametric similarity and grounded in the manufacturer datasheet.

01 — Overview

This Toshiba datasheet covers the TC78H621FNG, a dual-bridge driver IC designed for driving two DC brushed motors or one stepping motor. The document outlines its scope as a complete solution for motor control applications using DMOS transistors. Key parameters include a maximum motor supply voltage of 18 V, logic supply up to 5.5 V, and an output current capability of 1.1 A. It features low on-resistance of 0.8 ohms and includes built-in safety circuits like over-current detection, thermal shutdown, and under-voltage lockout.

02 — Key specifications

Datasheet parameters

ParameterMinTypMaxConditions
output current — — 800 mA —
supply voltage range 2.7 V 3.3 V 5.5 V —
operating temperature -30 °C — 85 °C
rise time — 20 ns —
fall time — 20 ns —
driver count — 2 —
03 — Alternatives

Closest matches to TC78H621

TB6612FNG 6.4× higher operating temperature, 2.1× higher fall time, 1.5× higher output current
DRV8837 1.7× higher supply voltage range, 1.2× lower operating temperature, 1.1× higher output current
DRV8803DW 10.3× higher supply voltage range, 8.8× higher fall time, 8.8× higher rise time
A4988 6.5× higher supply voltage range, 1.9× higher output current, 1.2× higher operating temperature
TB67H450FNG 7.3× higher supply voltage range, 4.4× higher output current, 4.0× higher fall time
TB67H451AFNG 7.3× higher supply voltage range, 4.4× higher output current, 4.0× higher fall time
TB67S109AFNG 8.6× higher supply voltage range, 4.5× higher fall time, 4.0× higher rise time
DRV8844 10.3× higher supply voltage range, 1.5× higher operating temperature
04 — FAQ

Frequently asked questions

What is the driver count for the TC78H621FNG?

The driver count is 2.

What is the fall time of the TC78H621FNG?

The fall time is 20 ns.

What is the maximum operating temperature for the TC78H621FNG?

The operating temperature is 85 °C.

What is the output current of the TC78H621FNG?

The output current is 800 mA.

What is the rise time of the TC78H621FNG?

The rise time is 20 ns.

What is the supply voltage range for the TC78H621FNG?

The supply voltage range is 3.3 V.

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