TC78B011FTG,EL

Overview

The TC78B011FTG,EL is a three-phase PWM chopper pre-driver IC designed for sensorless brushless DC motors. It operates with an external six-N-channel MOSFET inverter bridge within a supply voltage range of 5.5V to 27V, with absolute maximum ratings up to 30V. The device utilizes a compact P-WQFN36 package featuring 36 pins. It supports sine wave control signals and integrates non-volatile memory (NVM) for parameter storage. Control interfaces include I2C serial communication, analog voltage input, and PWM duty cycle adjustment.

Feature Summary

• Integrates non-volatile memory to store motor-specific parameters without requiring an external microcontroller.
• Enables closed-loop speed control through adjustable advance angles ranging from zero to thirty degrees.
• Supports multiple speed regulation methods including I2C commands, analog voltage inputs, and PWM duty cycle limits.
• Provides comprehensive protection mechanisms including thermal shutdown, overcurrent detection, and stall prevention.

Applications

• Sensorless brushless DC motor drives
• Fan controller systems
• Precision motion control applications

Procurement Notes

Verify the specific suffix EL against official Toshiba documentation to confirm packaging configuration. Ensure compatibility with the required N-channel MOSFET gate drive specifications. Confirm that the I2C address and register map align with the system design requirements before finalizing procurement.

Selection Notes

Select this component when designing sensorless BLDC systems requiring integrated closed-loop control without external processing overhead. The built-in NVM simplifies calibration by storing unique motor characteristics directly on the chip. Consider the P-WQFN36 footprint for space-constrained layouts requiring robust thermal performance.

Part Context

This part belongs to Toshiba's series of three-phase brushless motor control pre-drivers. It distinguishes itself by combining sine wave commutation logic with digital control interfaces. The integration of advanced protection features and non-volatile memory reduces the bill of materials by eliminating the need for separate EEPROM or complex MCU firmware for basic motor management.

Replacement Considerations

Consult official Toshiba substitution lists for verified equivalents. Generic replacements may lack the specific NVM programming capabilities or sine wave control algorithms inherent to this model.

FAQ

How does the TC78B011FTG,EL handle rotor position detection?

It detects rotor position by monitoring the back-EMF zero-crossing points of the U-phase during the sine wave commutation process, enabling sensorless operation.

What happens if an abnormality is detected during operation?

The IC enters an error mode and automatically restarts after a set recovery time. If a stop command is active during the error state, it transitions to idle mode.