Instruction manual
for Evaluation Board of
TB67S109AFNG
May 10, 2015
Re v.1.0
【Outline】
The TB67S109A is a two-phase bipolar stepping motor driver using a PWM chopper.
CLK-IN control system and BiCD process are adopted. Rating of 50V and 4.0A is
realized.
This evaluation board mounts necessary components to evaluate the IC. Each
excitation drive of full step, half step, quarter step 1/8 step, 1/16 step, and 1/32 step
can be run with PWM constant current drive. Please sense low noise and low
vibration of the stepping motor.
【Note】
In using, please be careful about thermal condition sufficiently.
As for each control signal, please refer to the IC specification by accessing to the
below URL.
http://toshiba.semicon-storage.com/info/lookup.jsp?pid=TB67S109AFNG®ion=apc&lang=en
Further, the application of this evaluation board is limited to the purpose of evaluating
and learning the motor control. Please do not ship them to a market.
Connection to Evaluation board
Corresponding table
(Silk name vs. Signal name)
(Note) Silk name and signal name on the board
are different because the series products have
the common board.
Two-phase bipolar
type
Stepping motor
Silk name
GND7
GND6
LO
VREFB
45
VREFA
OSCM
3
4
5
7
8
9
10
Signal name
NC
NC
LO
VREFB
DMODE0
VREFA
OSCM
CW/CCW
MO
DMODE1
DMODE2
CLK
ENABLE
RESET
Power
GND
source of
VM
VM
(10V to 47V)
VrefB(for B-axis)
VrefA(for A-axis)
Reference voltage for
motor current set
Vref (0V to 3.6V)
Setting evaluation board１
Setting motor current
Setting motor current
Iout(max) = VREF(gain) x
Vref(V)
R
RS
(Ω)
VREF(gain):Decay ratio of VREF: 1/5.0 (typ.)
RRS=0.22Ω
RRSB
R_VRF1
R_VRF2
Mounted JP_VRF2
area
RRSA
JP_VRF1
VrefA
VrefB
Waveform of motor current
Charge
Fast
Slow
VREF of A-axis and B-axis are made common
by short the jumper (JP_VRF1) and the both
voltages are possible to input from VREFA pin.
And Vref can be generated from the internal
regulator (VCC) by mounting the divider
resistance to R_VRF1 and R_VRF2 and short-
circuiting JP_VRF2.
Current value of setting motor
Setting evaluation board２
Setting chopping frequency of the constant current of the motor
Formula of setting chopping frequency
fOSCM = 1 / [0.56 x
½C
x (R1 + 500)}]
fchop = fOSCM / 16
Recommended frequency range:
fchop=40kHz to 150kHz
100kHz configuration
Mounted parts are as follows;
Capacitor (C=270pF), Resistance
(R1=3.6kΩ)
C
R1
Waveform of motor current
Charge
Fast
Slow
Chopping frequency (fchop)
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