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 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) 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
Toshiba Electronic Devices & Storage Corporation 1 2019-11-28 TC78H670FTG
3. Pin Assignment
(Top View) MODE2 /
CLK /
S_CLK MODE1 /
SET_EN /
LATCH 15 16 MODE0 /
UP-DW /
EN / ERR
S_DATA 14 13 MODE3 / CW-CCW 1 12 STBY AGND 2 11 OSCM VM 3 10 VREF 4 9 PGND_B TC78H670FTG PGND_A 5
OUT_A+ 6 7 OUT_A-OUT_B-8
OUT_B+ Note: Please solder the corner pads and the rear thermal pad of the QFN package, to the GND pattern of the PCB. 2 2019-11-28 TC78H670FTG …