Toshiba TC78H630FNG, TC78H621FNG and TC78H611FNG H bridge driver ICs

Toshiba’s Storage & Electronic Devices Solutions Company has added the models TC78H630FNG, TC78H621FNG and TC78H611FNGo to its line-up of H bridge driver ICs for DC brushed motors and stepping motors used in the mobile battery-drive equipment, home appliances, and housing and facility equipment.

TC78H630FNG has one H bridge with a 2 A rating and is suitable for the large current drive of DC brushed motors. Additionally, making on-resistance 0.4Ω (sum of upper and lower: typ) in the motor driver output block allows the IC to realise a large current drive for motors. The TC78H621FNG and TC78H611FNG have two H bridges with 1 A ratings and are suitable for driving bipolar stepping motors or two DC brushed motors. The series supports 2.5 to 15 V power supply for driving motors.

Abnormality detection functions (overcurrent detection, thermal shutdown circuit and undervoltage lockout circuit) improve safety in driving the motor. Consumption current of approximately 0 μA (typ) in standby mode (in case of motor stop) is realised. Shoot-through current protection is also incorporated; the motor can be controlled without considering the dead time in switching output on and off.

Applications include mobile devices (cameras and small printers) with a 3.7 V lithium-ion battery, home appliances with 5 or 12 V power supply (refrigerators and air conditioners), and housing and facility equipment (smart meters, hot-water supply machines, water supply valves of water service, and electronic locks).