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TB67H400AHG

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P23
TB67H400AHG
2016-12-22
13
Output transistor operation mode
Output transistor operational function
MODE U1 U2 L1 L2
CHARGE ON OFF OFF ON
SLOW OFF OFF ON ON
FAST OFF ON ON OFF
Note: The parameters shown in the table above are examples when the current flows in the directions shown in the
figures above.
For the current flowing in the reverse direction, the parameters change as shown in the table below.
MODE U1 U2 L1 L2
CHARGE OFF ON ON OFF
SLOW OFF OFF ON ON
FAST ON OFF OFF ON
This IC controls the motor current to be constant by 3 modes listed above.
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes.
Charge mode
A current flows into the motor coil.
Slow mode
A current circulates around the
motor coil and this device.
Fast mode
The energy of the motor coil
is fed back to the power
Charge mode
A current flows into the motor coil.
Slow mode
A current circulates around the
motor coil and this device.
Fast mode
The energy of the motor coil
is fed back to the power
U1
L1
U2
L2
OFF
OFF
U1
L1
U2
L2
OFF
ON
ON
Load
U1
L1
U2
L2
Load
RS pin
RRS
VM
ON
ON
Load
ON
RS pin
RRS
VM
RS pin
RRS
VM
OFF
OFF
ON
OFF
U1
L1
U2
L2
OFF
OFF
U1
L1
U2
L2
OFF
ON
ON
Load
U1
L1
U2
L2
Load
RS Pin
RRS
VM
ON
ON
Load
ON
RS Pin
RRS
VM
RS Pin
RRS
VM
OFF
OFF
ON
OFF
TB67H400AHG
2016-12-22
14
Calculation of the predefined output current
For PWM constant current control, this IC uses a clock generated by the OSCM oscillator.
The peak output current (Setting current value) can be set via the current-sensing resistor (RRS) and the reference
voltage (Vref), as follows:
Iout (max) = Vref (gain) ×
Vref (gain): the Vref decay rate is 1 / 5.0 (typ.)
For example: In the case of a 100% setup
When Vref is 3.0 V and RSS is 0.51 Ω, the motor constant current (Peak current) will be calculated as:
Iout
= 3.0 V / 5.0 / 0.51 Ω= 1.18 A
Calculation of the OSCM oscillation frequency (chopper reference frequency)
An approximation of the OSCM oscillation frequency (fOSCM) and chopper frequency (fchop) can be calculated by the
following expressions.
fOSCM = 1/ [0.56 × {COSC × (ROSC + 500)}]
* COSC, ROSC: External components for OSCM (When COSC is 270 pF and ROSC is 5.1 kΩ, fOSCM is about
1.12 MHz (typ.).)
fchop = fOSCM / 16
* When fOSCM is 1.12 MHz, fchop is about 70 kHz (typ.).
If chopping frequency is raised, the ripple of current will become small and wave-like reproducibility will improve.
However, the gate loss inside IC goes up and generation of heat becomes large.
The standard frequency is about 70 kHz. A setup in the range of 50 to 100 kHz is recommended.
Vref (V)
RRS (Ω)
TB67H400AHG
2016-12-22
15
Absolute maximum ratings (Ta = 25°C)
Characteristics Symbol Rating Unit Remarks
Motor power supply
VM
50
V
―
Motor output voltage
Vout
50
V
―
Motor output current
Iout(S)
4.0 A
Small mode
(Note1)
Iout(L) 8.0 A
Large mode
(Note1)
VCC voltage
VCC
6.0
V
―
Digital input voltage
VIN(H)
6.0
V
―
VIN(L)
-0.4
V
―
Vref input voltage
Vref
GND to 4.2
V
―
Power dissipation
PD
3.5
W
(Note2)
Operating temperature
Topr
-20 to 85
°C
―
Storage temperature
Tstg
-55 to 150
°C
―
Junction temperature
Tj
150
°C
―
Note1: While in use, please make sure to take the heat generation matter into consideration, and use below 70% of the
absolute maximum ratings (Iout(S) ≤ 2.8 A, Iout(L) ≤ 5.6 A) as a reference. Operating conditions (such as
surrounding temperature or board conditions) may limit the operating current. (Depends on the heat
conditions.)
Note2: The value in the state where it is not mounted on the board. Ta exceeding 25°C would require derating at 28.0
mW/°C.
Ta : Ambient temperature.
Topr : Operating ambient temperature.
Tj : Operating junction temperature. The maximum junction temperature is limited by the thermal shutdown
circuit (TSD).
Use the maximum junction temperature (Tj) at 120°C or less. The maximum current cannot be used under
certain thermal conditions.
Caution) Absolute maximum ratings
The absolute maximum ratings of a semiconductor device are a set of ratings that must not be exceeded, even for a
moment. Do not exceed any of these ratings. Exceeding the rating (s) may cause device breakdown, damage or
deterioration, and may result in injury by explosion or combustion. The value of even one parameter of the absolute
maximum ratings should not be exceeded under any circumstances. The TB67H400AHG does not have overvoltage
detection circuit. Therefore, the device is damaged if a voltage exceeding its rated maximum is applied. All voltage
ratings, including supply voltages, must always be followed. The other notes and considerations described later should
also be referred to.
Operating ranges (Ta=-20 to 85°C)
Characteristics Symbol Min Typ. Max Unit
Remarks
VM power supply
VM
10
24
47
V
―
Motor output current
Iout(S)
-
1.5
3.0
A
Small mode
Iout(L)
-
3.0
6.0
A
Large mode
Logic input voltage
VIN(H)
2.0
―
5.5
V
Logic [High] level
VIN(L)
GND
―
0.8
V
Logic [Low] level
Logic input frequency
fLOGIC
―
―
400
kHz
IN1, IN2, PWM
PWM signal frequency
fchop(range)
40
70
150
kHz
―
Vref input voltage
Vref
GND
2.0
4.0
V
―
Note: The actual maximum current may be limited by the operating environment (operating conditions such operating
duration, or by the surrounding temperature or board heat dissipation). Determine a realistic maximum current
by calculating the heat generated under the operating environment.
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TB67H400AHG

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Description:
Motor / Motion / Ignition Controllers & Drivers MONOLITHIC BRUSHED DC MOTOR DRIVER BiCD
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