TC78H670FTG TOSHIBA CD process Integrated Circuit Silicon Monolithic TC78H670FTG Clock-in and Serial controlled Bipolar Stepping Motor Driver 1. Outline The TC78H670FTG is a two-phase bipolar stepping motor driver using a PWM chopper which incorporate DMOS with low on-resistance in output transistors. The clock-in decoder is built in. P-VQFN16-0303-0.50-001 Weight: 22.9 mg (typ.) 2. 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 (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) Note: Please be careful about thermal conditions during using. Note: It is possible to detect OPD only when Serial mode is selected. Start of commercial production 2020-01 2019-2021 1 2021-02-09 Toshiba Electronic Devices & Storage Corporation TC78H670FTG 3. Pin Assignment (Top View) MODE2 / MODE1 / MODE0 / CLK / SET EN / UP-DW / EN / ERR LATCH S CLK S DATA 15 14 16 13 1 12 STBY MODE3 / CW-CCW AGND 11 2 OSCM TC78H670FTG VM 3 10 VREF 9 PGND B 4 PGND A 5 6 7 8 OUT A- OUT B+ OUT B- OUT A+ Note: Please solder the corner pads and the rear thermal pad of the QFN package, to the GND pattern of the PCB. 2 2021-02-09