Summary of TOSHIBA LAUNCHES NEW HIGH-RESOLUTION MICRO-STEPPING MOTOR DRIVER IC WITH INTEGRATED CURRENT SENSING
Toshiba launched the TC78H670FTG, a dual-channel, high-resolution micro-stepping motor driver IC for consumer devices (3D printers, cameras, portable printers, scanners, pico-projectors, battery-powered medical devices). It supports up to 128 micro-steps, 2.5–16 V supply, max 2 A output, low RDS(ON) (0.48 Ω), ultra-low standby current (0.1 µA), 1.8–5.0 V interface, integrated current sensing, multiple micro-step modes, protection/error detection, adjustable chopping frequency, and comes in a small 16-pin QFN with thermal pad.
Parts used in the TC78H670FTG Project:
- TC78H670FTG dual-channel micro-stepping motor driver IC
- Micro-stepping motor (bipolar, up to 128 steps)
- Power supply (2.5 V to 16.0 V)
- Host microcontroller or controller interface (1.8 V to 5.0 V compatible)
- External sense resistor (if used with adjustable current detection architecture)
- External resistor for chopping frequency adjustment
- PCB with thermal pad footprint for 16-pin QFN package
- Decoupling capacitors for VCC and motor supply
- Motor connection wiring and connectors
Toshiba Electronics Europe GmbH has launched an additional device to its line-up of micro-stepping motor driver ICs. The new TC78H670FTG is a dual channel high resolution micro-stepping motor driver IC that is capable of driving motors with a wide range of operating voltages. The new device is intended for a broad variety of consumer applications including 3D printers, cameras, security cameras, portable printers, handheld scanners, pico-projectors and battery powered medical devices.
The IC can drive a micro-stepping motor of up to 128 steps and with a voltage ranging from 2.5 V to 16 V at currents of up to 2 A. The output on-resistance (RDS(ON)) is only 0.48Ω as the TC78H670FTG uses Toshiba’s latest CDMOS process, thereby reducing voltage loss and heat generation inside the driver. An ultra-low standby current of just 0.1 µA prolongs battery life and the ability to operate with a 1.8 V to 5.0 V interface allows connection to a wide variety of hosts and microcontrollers. As a result, the device is suited for use in USB powered and battery powered applications as well as with standard 9-12V system devices.
Summary of Features
- Built-in Dual H Bridges, Capable of controlling 1 bipolar stepping motor
- PWM controlled constant-current drive
- Power supply operating voltage: 2.5V to 16.0V
- Output current ratings: 2.0A (max)
- Low on-resistance (High + Low side = 0.48Ω (typ.)) MOSFET output stage
- Allows full, half, quarter, 1/8, 1/16, 1/32, 1/64, 1/128 step operation
- Built-in Sense resistor less current control architecture (Advanced Current Detection System)
- Multi error detect functions (Thermal shutdown (TSD), Over current (ISD), motor load open (OPD) and Under voltage lockout (UVLO))
- Error detection (TSD/ISD/OPD) flag output function
- Built-in VCC regulator for internal circuit
- Chopping frequency of a motor can be adjusted by external resistor
- Small QFN package with thermal pad (16-pin)
- Ultra-low standby current of 0.1mA
- Operates motors smoothly and quietly and reduces vibration; improved rotation angle accuracy achieved by micro-stepping control.
Read more: TOSHIBA LAUNCHES NEW HIGH-RESOLUTION MICRO-STEPPING MOTOR DRIVER IC WITH INTEGRATED CURRENT SENSING
- What voltage range does the TC78H670FTG support?
The device supports a power supply operating voltage from 2.5 V to 16.0 V. - How much output current can the TC78H670FTG deliver?
The IC has an output current rating of up to 2.0 A (max). - What micro-stepping resolutions are available with this IC?
It allows full, half, quarter, 1/8, 1/16, 1/32, 1/64, and 1/128 step operation. - Does the IC include current sensing?
Yes, it has a built-in sense resistor less current control architecture called Advanced Current Detection System. - What protections and error detections does the TC78H670FTG offer?
It provides thermal shutdown (TSD), over current (ISD), motor load open (OPD), under voltage lockout (UVLO), and error flag outputs for TSD/ISD/OPD. - Can the chopping frequency be adjusted?
Yes, the chopping frequency of a motor can be adjusted using an external resistor. - What package does the TC78H670FTG come in?
The IC is supplied in a small 16-pin QFN package with a thermal pad. - Is the IC suitable for battery-powered applications?
Yes, it has an ultra-low standby current (0.1 µA) and supports 1.8 V to 5.0 V interfaces, making it suitable for USB and battery powered applications. - How does the IC affect motor noise and vibration?
The IC operates motors smoothly and quietly, reduces vibration, and improves rotation angle accuracy through micro-stepping control.
