TB67S179FTG
Toshiba BiCD Process Integrated Circuit Silicon Monolithic
TB67S179FTG
Clock controlled 2-phase Unipolar stepping motor driver
FTG
The TB67S179FTG is a Clock controlled PWM chopping type 2-phase
unipolar stepping motor driver. Using the BiCD process, the TB67
S179FTG can be operated with VM voltage of 80V, output voltage
of 80V, and output current of 1.5A at max (absolute maximum ratings).
Features
・BiCD
processed monolithic integrated circuit.
・Capable
of operating one unipolar stepping motor.
・Full,
half(a), half(b), quarter, 1/8, 1/16, 1/32 step resolution.
・PWM
controlled synchronous rectification constant current drive.
・Reverse
current protection function
・Error
detect feedback signal output function (Over current/Thermal shutdown).
P-VQFN48-0707-0.50-004
Weight 0.14 (g) (typ.)
・Error
detect function (Thermal shutdown(TSD), Over current(ISD), and Low voltage(POR).
・Standby
mode (low power) function
・Brake
function
・Low
on resistance(0.5Ω (Typ.) output MOSFET.
・High
voltage and current (For specification, please refer to the absolute maximum ratings and operation ranges).
・Build-in
VCC regulator for internal circuit use.
・Fixed
off time can be adjusted by external components.
Note: Please be careful about the thermal conditions during use.
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Application Notes
All the grounding wires of the device must run on the solder mask on the PCB and be externally terminated at only one
point. Also, a grounding method should be considered for efficient heat dissipation.
Careful attention should be paid to the layout of the output, VDD (VM) and GND traces, to avoid short circuits across
output pins or to the power supply or ground. If such a short circuit occurs, the device may be permanently damaged.
Also, the utmost care should be taken for pattern designing and implementation of the device since it has power supply
pins (VM, RSGND, OUT, GND) through which a particularly large current may run. If these pins are wired incorrectly, an
operation error may occur or the device may be destroyed.
The logic input pins must also be wired correctly. Otherwise, the device may be damaged owing to a current running
through the IC that is larger than the specified current.
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Pin explanations
TB67S179FTG (VQFN48)
Pin No.1 to 28
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
Pin Name
NC
NC
CLK
NC
ENABLE
CW/CCW
BRAKE
GND
NC
NC
NC
NC
OUTA+
OUTA+
RSGNDA
RSGNDA
OUTA-
OUTA-
OUTB-
OUTB-
RSGNDB
RSGNDB
OUTB+
OUTB+
NC
VCOM
VCOM
NC
Non connection
Non connection
External Clock input pin
Non connection
Motor output ON/OFF pin
Clock-wise/Counter Clock-wise setting pin
Brake input pin
Ground pin
Non connection
Non connection
Non connection
Non connection
Motor output
Motor output
A+ pin
A+ pin
Function
Ach current sense ground pin
Ach current sense ground pin
Motor output
Motor output
Motor output
Motor output
A-pin
A-pin
B-pin
B-pin
Bch current sense ground pin
Bch current sense ground pin
Motor output
Motor output
B+ pin
B+ pin
Non connection
Common pin
Common pin
Non connection
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