Toshiba - TC78H670FTG 1/128 stepper motor driver

Toshiba – TC78H670FTG 1/128 stepper motor driver

The TC78H670FTG is a two-phase bipolar stepping motor driver using a PWMchopper which incorporate DMOS with low on-resistance in outputtransistors. The clock-in decoder is built in.

TC78H670FTG – Upgrade from previous TC78S600/ TC78H6xx

Features
– Built-in Dual H Bridges, Capable of controlling 1 bipolar stepping motor
– PWM controlled constant-current drive
– Power supply operating voltage: 2.5 V to 16.0 V
– Output current ratings: 2.0 A (max)
– Low on-resistance (High + Low side = 0.48 Ω (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 (16pin)

Applications
– Scanner
– Projector
– Battery operated devices

Application circuit Example