TB67S261FTG
TOSHIBA BiCD Integrated Circuit Silicon Monolithic
TB67S261FTG
CLOCK-in controlled Bipolar Stepping Motor Driver
The TB67S261 is a two-phase bipolar stepping motor driver
using a PWM chopper. An interface is PHASE in
control.
Fabricated with the BiCD process, rating is 50 V/2.0 A .
FTG
Features
・BiCD
process integrated monolithic IC.
・Capable
of controlling 1 bipolar stepping motor.
・PWM
controlled constant-current drive.
・Allows
full, half, quarter step operation.
・Low
on-resistance (High + Low side=0.8Ω(typ)) MOSFET
output stage.
・High
efficiency motor current control mechanism (Advanced
Dynamic Mixed Decay)
・High
voltage and current (For specification, please refer to absolute
maximum ratings and operation ranges)
・Error
detection (TSD/ISD) signal output function
・Built-in
error detection circuits (Thermal shutdown (TSD), over-current
shutdown (ISD), and power-on reset (POR))
・Built-in
VCC regulator for internal circuit use.
・Chopping
frequency of a motor can be customized by external resistance
and
capacitor
.
・package
TB67S261FTG: P-WQFN48-0707-0.50-003
Note) Please be careful about
thermal conditions during use.
P-WQFN48-0707-0.50-003
Weight 0.10g (typ.)
©2015 TOSHIBA CORPORATION
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2015-6-3
TB67S261FTG
Application Notes
All the grounding wires of the TB67S261 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, RS, 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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TB67S261FTG
Pin explanations
TB67S261FTG (QFN48)
Pin No.1 – 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
INB1
INB2
STANDBY
GND
NC
RSA(*)
RSA(*)
NC
OUTA＋(*)
OUTA＋(*)
NC
NC
NC
GND
OUTA－(*)
OUTA－(*)
GND
GND
OUTB－(*)
OUTB－(*)
GND
NC
NC
NC
OUTB＋(*)
OUTB＋(*)
NC
Non-connection pin
Motor
Bch excitation control input 1
Motor
Bch excitation control input 2
All-function-initializing and Low power dissipation mode
Ground pin
Non-connection pin
Motor Ach current sense pin
Motor Ach current sense pin
Non-connection pin
Motor Ach (+) output pin
Motor Ach (+) output pin
Non-connection pin
Non-connection pin
Non-connection pin
Ground pin
Motor Ach (-) output pin
Motor Ach (-) output pin
Ground pin
Ground pin
Motor Bch (-) output pin
Motor Bch (-) output pin
Ground pin
Non-connection pin
Non-connection pin
Non-connection pin
Motor Bch (+) output pin
Motor Bch (+) output pin
Non-connection pin
Function
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2015-6-3
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