H-Bridge Driver ICs for Low-Voltage DC Brushed Motor Drives

Toshiba Electronics Europe (TEE) today announced the launch of three new additions to its line-up of H-bridge driver ICs for dc brushed motors and stepping motors used in mobile battery-drive equipment, home appliances, housing and facility equipment.

TC78H630FNG has a single H-bridge with a 2.1A rating and a low on-resistance of 0.4Ω (upper + lower, typ.) in the output stage allowing the IC to deliver a large current drive for dc brushed motors. The TC78H630FNG supports short brake mode.

TC78H621FNG and TC78H611FNG have two H-bridges with 1.1A ratings, and are suitable for driving bipolar stepping motors with full-step controllability on 3 ports or half-step on 4 ports. The devices have a low on-resistance of 0.8Ω (upper + lower, typ.) in the output stage. The TC78H621FNG can also drive a single dc brushed motor, while the TC78H611FNG can drive two and supports short brake mode.

These new products are suitable for a wide range of applications including mobile devices (point-of-sale devices) with a 3.7V lithium-ion battery, home appliances with a 5V or 12V power supply (refrigerators, air outlet ports in air-conditioner and ventilation), and residential and facility equipment (smart meters, water supply valves and electronic locks). The maximum output voltage is 18V.

All of the new devices are housed in a TSSOP16 package and include multiple safety features, such as overcurrent detection, thermal shutdown, under voltage lockout and shoot-through current protection.

They require a logic power supply in the range 2.7 to 5.5V and can accept motor drive voltages in the range 2.5- to 15-V. In standby mode the current consumption is approximately 1μA (max.)

Functional samples are available and mass production has commenced.