Toshiba TC78H621FNG, TC78H611FNG stepper motors drivers

Toshiba’s new H-bridge driver ICs for DC brushed motors 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.

The new devices have two H-bridges with 1.1A ratings, and can drive two DC brushed motors, while the TC78H611FNG also supports short brake mode. The TC78H621FNG has Phase/Enable-Inputs, whereas the TC78H611FNG uses IN1/IN2-Input coding.

They require a logic power supply in the range of 2.7 to 5.5V and can accept motor drive voltages in the range 2.5 to 15V.

Key features

• Power supply voltage for motor : VM=18 V(Max)
• Power supply voltage for control : VCC=6 V(Max)
• Output current : IOUT=1.1 A(Max)
• Output ON resistance : Ron(upper and lower sum)=0.8 Ω(Typ.)

Additional features

• Internal pull-down resistors on inputs : 200 kΩ(Typ.)
• Built-in over current detection (ISD)
• Thermal shutdown (TSD) circuit
• Under voltage lockout (UVLO) circuit.
• Built-in cross conduction protection circuit.
• Short Brake mode ( TC78H611FNG only )
• Current consumption in standby mode approx. 1μA (max.)
• Small package : P-TSSOP16-0505-0.65-001

Applications

• Home appliances
• Point-of-sales
• White goods
• Housing and facility equipment
• Ventilation
• Water supply valves
• Electronic lock
• Smart meter