Skip to datasheet
Dual brushed-DC motor driver

TB6612FNG Working Principle

Learn how TB6612FNG works with an illustrated explanation and practical readings.

TB6612FNG at a glance

Follow the labeled connections and functional stages

TB6612FNG working principle: illustrated functional stages, basic circuit and connections
Select the diagram to read it at full resolution.

How it works

3 stages · Explore one step at a time

Step 1 / 3

Choose direction

Set opposite IN1/IN2 levels for one direction, then reverse them for the other.

Step 2 / 3

Apply PWM

With STBY HIGH, PWM alternates powered drive and low-side short brake.

Step 3 / 3

Manage current and heat

The motor, supply and switching losses determine current. This IC has no external current-limit adjustment.

Component view