marutsu TB67H400AHG User manual

Instruction Manual for
Evaluation Board of TB67H400AHG
12th Sep. 2018
Rev.1.0

The TB67H400AHG is a dual channel DC brushed Motor Driver that supports both
the constant current PWM control and the direct PWM control and is capable to
control two DC brushed DC independently.
By adopting Bi-CD process maximum Output withstand voltage of 50V and
maximum Output current of 4.0A/channel as absolute maximum ratings are realized.
In addition by using built-in parallel control function (Large mode) in output stage
one channel high current drive of 8.0A as absolute maximum rating is available.
【Note】
In using this device please be careful about the thermal condition sufficiently.
And for detailed operations such as control input please refer to the datasheet
and the application notes by accessing to the following URL.
https://toshiba.semicon-storage.com/ap-en/product/linear/motordriver/detail.TB67H400AHG.html
Further use of this evaluation board is strictly limited to the purpose of evaluating
and learning the motor control. Please do not ship it to market.
Product Outline

Power Supply Voltage and Operating Range
In using the TB67H400AHG, the voltage should be applied to the VM and VRE pins.
The absolute maximum rating of VM (Power supply voltage for motor) is 50V,
but operating range of the power supply is 10 to 47V.
The absolute maximum rating of VRE (Reference Voltage for setting motor current) is 5V,
but operating range of this voltage is 0 to 4.0V.
Power Supply Sequence
In applying power supplies and shutting those down, no special procedures is required,
because the TB67H400AHG incorporates a error detection circuit of power-on reset (POR).
The threshold voltage of POR is designed as VM=8.0V±1.0V.
However, under unstable state of VM as raising and falling, it is recommended to turn off
the motor operation. Please start operation of motor by input signals after the power supplies
become stable state.
Motor Current (Output Current)
Motor current should not exceed the specified Output Current (3.0A or less).
Also, please note that the maximum current may be limited due to usage conditions
(ambient temperature, heat issue, step resolution setting, etc.).
Please set to the optimum value after thermal circulation and actual evaluation under
operating environment .
Control Input
Before applying Power supplies, it is recommended that Input signals (IN1A, IN2A, IN1B, IN2B,
PWMA, PWMB) are set to Low level. But even if the logic signal is inputted when VM voltage is
not applied, electromotive force does not generate.
Basic Notes in use of this evaluation board

TSD (Thermal Shut Down)
When the junction temperature (Tj) of this chip exceeds 160°C(typ.),a internal detection
circuit stars operation and all outputs are turned off.
In the operating state of TSD, IC stays stop mode.
After TSD operation, this is canceled by turning the power supply on again or setting to
standby mode once by (IN1A, IN2A, IN1B, IN2B, PWMA, PWMB=all Low) and then releasing it.
This TSD functions when the IC abnormally heats up. So that please avoid utilizing this
function actively.
ISD (Over Current Detection)
When any of current which flows in output transistors exceeds 4.9A(typ.), a internal
detection circuit stars operation and turns off all output transistors.
In the operating state of ISD, IC stays stop mode.
After TSD operation, this is canceled by turning the power supply on again or setting to
standby mode once by (IN1A, IN2A, IN1B, IN2B, PWMA, PWMB=all Low) and then releasing it.
＊Those above values in each detection circuit are not guaranteed but reference ones.
Explanation of Each Abnormality Detection Circuit

Silk
name
Signal
name
MO E0 NC
4 NC
VREF Vref
6 HBMO E
8 INA1
9 INA2
10 PWMA
11 PWMB
12 INB1
13 INB2
14 TBLKAB
GND
VM
Vref (Common for A/B)
Reference Voltage for
setting motor current
Vref (0~4.0V)
Brushed DC Motor (A)
Corresponding table of
Silk name and Signal name
Please note that the names of silk
and signal on this board are different
each other as follows, because this
board is designed and developed
as a unfired one for H-Bridge series.
Connection of Evaluation Board 1
In use of Small Mode
Brushed DC Motor (B)
Power Supply VM
(10~47V)
Small mode is set by
connecting this jumper
of HBMO E to Low

Connection of Evaluation Board 2
In use of Large Mode
③
③③
③
①
①①
①
④
④④
④
②
②②
②
⑤
⑤⑤
⑤
HBMODE
Large Mode is a parallel control function of the output
part, OUTA+ and OUTA-, OUTB+ and OUTB- are tied
in cascade as shown in the circuit diagram below.
n that case, the current balance of A-ch and B-ch
becomes important in operation due to high current.
n use of this mode please make the following changes.
①Mounting the motor connector
Please mount a connector at the two pins in the middle.
②Shorting of RSA terminal and RSB terminal
By using the holes for check pin mounting, RSA terminal and
RSB terminal are shorted with wiring.
Mounting of 0 Ω resistor (short resistor)
To commonize RSS, by utilizing the rounds for C_OAM, C_OAP
and C_OBM, C_OBP, OUTA+ and OUTA-, OUTB- and OUTB+
are shorted with wiring etc.
④Removal of resistor R_RSB
The resistor R_RSA becomes RRS in the circuit diagram below.
The constant current control value is set according to the input
voltage Vref.
⑤Set HBMODE to "H" level
In order to input "H“ level, please set a short pin to "H“ side.
【Changed unction of Terminal 】
n Large Mode, the functions of
each terminal are changed as
shown in the table on the right.
Silk
name
Signal
name
8 IN1
9 IN2
10 PWM
11 Non use
12 Non use
13 Non use 1 Large DC Motor operation
A-ch and B-ch are connected
in parallel to form one H-Bridge,
and it drives one motor.

Vref
RRSB
R_VRF1
R_VRF2
JP_VRF2
JP_VRF1
The TB67H400AHG conducts motor operation by PWM
constant current control which is based on the frequency
of the OSCM oscillation circuit. The maximum current value
(set Motor current value) can be determined by a sense
resistor (RRS) and the reference voltage (Vref).
Formula of setting Motor Current Value
out(max)=Vref(gain) x
Vref(gain): damping ratio of Vref is 1/5.0(typ.)
This board is set to RRS=0.22Ω
By using the jumper of JP_VRF1, Vref of A and B channel
are unified, and both can be set from the VrefA pin.
And it is also possible to generate a Vref voltage from the
built-in regulator of VCC voltage by mounting resistors in
R_VRF 1 and R_VRF2, and shorting JP_VRF2 on this board.
However, please note that if more current than the built-in
regulator‘s ability is drawn, VCC regulation may not be
maintained. So that please be careful that total of voltage
dividing resistors does not become less than 10kΩ.
Vref(V)
RRS(Ω)
etting Evaluation Board :1
Setting Motor Current
RRSA
Set Motor Current Value
Waveform of Motor Current
Charge Fast
Slow

R1
C
etting Evaluation Board :2
Setting the Chopping Frequency for constant current PWM control
n PWM control of the TB67H400AHG, the internal
oscillation frequency (fOSCM) and the chopping frequency
(fchop) can be adjusted according to the constant of the
external components those are connected to the OSCM pin.
n general, fchop is recommended to set in the frequency
range of 50kHz to 100kHz.
Formula of Chopping Frequency
fOSCM=1 / [0.56 x {C x (R1+500)}]
fchop= fOSCM / 16
This board is set to 100kHz by mounting C=270pF and
R1=3.6kΩ.
Waveform of Motor Current
Chopping Frequency fchop
Charge Fast
Slow

On this evaluation board, jumpers as shown in the
picture above are provided for setting operation of
TB67H400AHG
When selecting functions by using jumpers, please short
the JP_VCC, or supply high level from the VDD pin.
The characters surrounded by white square frame close
to the jumpers show the Level (H/L). Please change the
position of jumpers in accordance with the function
setting to be used.
Further when inputting signals from the outside, please
remove the short pins.
JP_VCC
VDD pin
etting Evaluation Board :3
Setting for Motor Operation
VDD pin
Those figures indicate levels
to fix the level by a umper
【Enlarged view of the jumper section】

INA1, INA2 (Small mode)
Input Output
PWMA INA1 INA2 OUTA+ OUTA- Mode
LL L OFF
(High Impedance)
OFF
(High Impedance)
※ tandby
H TOP (OFF)
LL H L L hort Break
H L H Reverse
LH L L L hort Break
H H L Forward
LH H L L hort Break
H
INB1, INB2 (Small mode)
INA1, INA2 (Large mode)
Input Output
PWMA INA1 INA2 OUT+ OUT- Mode
LL L OFF
(High Impedance)
OFF
(High Impedance)
※ tandby
H TOP (OFF)
LL H L L hort Break
H L H Reverse
LH L L L hort Break
H H L Forward
LH H L L hort Break
H
※ Standby mode is entered when all 6 terminals, INA1, INA2, PWMA, INB1, INB2, and PWMB are set to Low
Input Output
PWMA INB1 INB2 OUTB+ OUTB- Mode
LL L OFF
(High Impedance)
OFF
(High Impedance)
※ tandby
H TOP (OFF)
LL H L L hort Break
H L H Reverse
LH L L L hort Break
H H L Forward
LH H L L hort Break
H
In case of Large mode
Operations are controlled by the A channel terminals (INA1, INA2,
PWMA). All signal input to the B channel terminals (INB1, INB2,
PWMB) are invalid.
In use of Large mode, it is recommended to set all INB1, INB2
and PWMB to Low.
etting Evaluation Board :4
Setting for Motor Operation – Input/Output Function