Series:	--
Packaging:	Tape & Reel (TR)
Lead Free Status / RoHS Status:	--
Part Status:	Active
Moisture Sensitivity Level (MSL):	--
Motor Type - Stepper:	Bipolar
Motor Type - AC, DC:	Brushed DC
Function:	Driver - Fully Integrated, Control and Power Stage
Output Configuration:	Half Bridge (8)
Interface:	Parallel
Technology:	Power MOSFET
Step Resolution:	1, 1/2, 1/4
Applications:	General Purpose
Current - Output:	2A
Voltage - Supply:	4.5 V ~ 5.5 V
Voltage - Load:	8 V ~ 38 V
Operating Temperature:	-20°C ~ 150°C (TJ)
Mounting Type:	Surface Mount
Package / Case:	48-TFSOP (0.240", 6.10mm Width) Exposed Pad
Supplier Device Package:	48-HTSSOP

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Introduction

TC78S122FNG is a motor driver and controller produced by Toshiba. It is a Power Management Integrated Circuit (PMIC) used for bi-directional motor control applications. It has a wide range of applications in automotive, industrial, home appliance, medical, and other fields. It supports two types of input (frontside and backsiden/rear) and a wide range of applications, including driving small to medium size Brushless DC (BLDC) motors.

Features

The key features of TC78S122FNG are:

• Two-phase, three-phase, micro-stepping and field-oriented control
• High dynamic performance
• Integrated current sense amplifier and voltage sense amplifier
• Integrated power stage with 30A/phase
• High resolution speed measurement and position detection
• Over-current protection, over-voltage protection and over-temperature protection
• Internal motor control circuit

Application Field

TC78S122FNG can be used in various applications, including:

• Automotive – Electric power steering (EPS) motors, air conditioner and oil pump motors​
• Industrial – Home appliances, pumps, fans and compressors
• Home Appliance – Vacuum cleaner, BLDC fan and BLDC motor
• Medical – Dental motor and blood pump motor

It is widely used for small and medium size motors and can drive up to 30A/phase. It is suitable for various applications such as speed control and position control.

Working Principle

TC78S122FNG has two control methods: field-oriented control (FOC) and conventional PWM control. The FOC method is suitable for high-speed applications because it provides high dynamic performance. It is also able to reduce current and torque ripple and increase speed response. The conventional PWM control helps reduce system cost by eliminating the need for an encoder in applications such as electronic power steering (EPS). It also has features such as over-current protection, over-voltage protection, and over-temperature protection.

Conclusion

TC78S122FNG is a PMIC from Toshiba which is used for bi-directional motor control in various applications. It supports two types of input, two-phase, three-phase, micro-stepping, and field-oriented control, and can drive up to 30A/phase. It has various features such as current sense amplifier, voltage sense amplifier, power stage and integrated motor control circuit. It has two control methods: FOC and conventional PWM control which are suitable for different applications.

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