DC brush motor driver IC suits industrial equipment

High output current and voltage are required for motor driver circuits in industrial equipment, banking terminals such as banknote recognition systems, home appliances including sewing machines and office automation equipment. These requirements make it difficult to design circuits with a single driver IC, as the high current generates heat. Multiple discrete semiconductors are generally used in order to reduce heat generation in each.

Housed in an HZIP25 package that enables high power dissipation, the TB67H303HG can sustain a 10A output current without overheating. This reduces the need for designers specifying the IC to use multiple discrete semiconductor devices, contributing the simplification and downsizing of applications.

The TB67H303HG motor driver IC adopts the latest high voltage analogue process, reducing ON resistance to 0.2Ω or less. Toshiba say that this is just 80% that of its predecessor. The motor driver can be operated in two driving modes: standard direct PWM mode, or the newly adopted constant current PWM mode. Both driving modes support Forward, Reverse, Short brake, and Stop functions when used with a single brush motor.

The IC also incorporates abnormality detection functions such as thermal shutdown circuit, over-current detection, and undervoltage lockout circuit. These functions improve the safety of the high current motor drive.