Toshiba TC78B025FTG brushless motor driver IC

Toshiba's TC78B025FTG, a three-phase brushless motor driver IC with a rotation speed control (closed-loop control) function, achieves flexible rotation speed control without the need for external microcomputers by incorporating a non-volatile memory (NVM).

This allows easy system configuration and supports motor speeds from hundreds to tens of thousands of rotations per minute (RPM), especially as Toshiba's Intelligent Phase Control (IPC) motor drive technology realizes energy-efficient driving across a wide rotation range without requiring lead angle adjustment.

Key features

• Closed-loop speed control: uniform rotation speeds up to tens of thousands RPM
• Embedded non-volatile memory makes an external MCU unnecessary
• Intelligent Phase Control: automatic lead angle optimization across the entire speed range
• 1-Hall drive system and current sense resistor elimination system reduces BOM

Additional features

• 1-Hall PWM drive system
  • 1-Hall sine-wave commutation
  • 1-Hall 150° commutation
• Configurable speed curve
• Low ON-resistance:
  • Hi+Lo side = 0.2 Ω (typ.)
• Driving current (peak): 3.5 A max.
• Operating voltage: 4.5 to 16 V
• Serial interface
• Standby mode
• Soft start
• Built-in protection circuits:
  • Undervoltage lockout (UVLO)
  • Overvoltage protection (OVP)
  • Undervoltage protection for the charge pump
  • Output current limit protection (OCP)
  • Overcurrent protection (ISD)
  • Thermal shutdown (TSD)
  • Lock detection protection
• Compact P-VQFN24 package:
  • 4.0 x 4.0 x 0.9 mm
• RoHS complaint

Advantages

• Uniform rotation speeds up to tens of thousands of RPM
• No control software development required
• No external MCU required
• Reduces current consumption by up to 20 % across the entire speed range
• Only initial lead angle optimization necessary
• Scalable power stage

Benefits

• Ideal for mission-critical applications that require constant cooling performance
• Reduced development time and cost
• Reduced Bill-of-Material (BOM)
• Faster Time-to-Market

Applications

• 12 V fan applications
• Charging stations for electrical vehicles
• PCs and servers
• Home appliances
• Industrial equipment

Advantage of IPC

Intelligent Phase Control (IPC) detects the motor current phase and feeds back the information for auto lead angle control. When a motor application has a sensor, the phase of the Hall signal is automatically adjusted to match that of the motor drive current. High efficiency is achieved regardless of the RPM, load torque, and power supply voltage of a motor. Intelligent Phase Control also helps reduce the number of external parts necessary for lead angle adjustment.