TB67H450FNG
TOSHIBA BiCD Process Integrated Circuit Silicon Monolithic
TB67H450FNG
PWM Chopper Type DC Brushed Motor Driver
The TB67H450FNG is a PWM chopper type DC brushed motor driver.
One channel of motor output block is embedded.
Fabricated with the BiCD process, the TB67H450FNG is rated at output
voltage 50 V, maximum current 3.5A.
Features
HSOP8
・
Monolithic IC using BiCD process
・
Capable of PWM constant current drive and direct PWM drive
・
Supporting 4 operation modes, Forward / Reverse / Brake / STOP (OFF)
・
Built-in output MOSFET with Low on-resistance (High side + low side=0.6Ω(typ.))
・
Realization of high voltage and large current drive (Refer to “Absolute maximum ratings” and “Operating range”.)
・
Built-in various error detection functions (Thermal shutdown (TSD), over current detection (ISD), and Under voltage
lockout(UVLO))
・
Built-in VCC regulator for the internal circuit operation.
Weight: 0.075g (typ.)
Note: Please be careful about the thermal conditions during use.
Parts Marking
Part Number
Package name (Note)
TB67H450FNG(O,N,EL
P-HSOP8-0405-1.27-002
TB67H450FNG(O,EL)
P-HSOP8-0405-1.27-001
TB67H450FNG(O,N,EL
TB67H450FNG(O,EL）
H450
H450
Lot code
..
Pin No.1
Start of commercial production
2019-05
© 2019-2020
Toshiba Electronic Devices & Storage Corporation
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TB67H450FNG
Pin Assignment
GND
1
IN2
2
IN1
3
VREF
4
TB67H450FNG
(Top View)
2
8
OUT2
7
RS
6
OUT1
5
VM
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TB67H450FNG
Block Diagram
VM
VCC Regulator
Charge
Pump
UVLO
IN1
IN2
OUT1
ISD
Control
Logic
Pre-driver
H-Bridge
OUT2
TSD
Up to 5V
Current
Comp
VREF
RS
GND
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory
purposes.
Note: All the grounding wires of the TB67H450FNG must run on the solder mask of the PCB. It must also be externally
terminated at a single point. Also, the grounding method should be considered for efficient heat dissipation.
Careful attention should be paid to the layout of the output, 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, OUT1, OUT2, and 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. Careful attention should be paid to design patterns and
mountings.
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TB67H450FNG
Pin Description
Pin description of pin No. 1 to 8.
Pin No.
Pin name
Description
1
GND
2
IN2
Logic input pin 2
3
IN1
Logic input pin 1
4
VREF
5
VM
6
OUT1
7
RS
8
OUT2
Ground pin
Motor output current setting pin
Motor power supply
Motor output pin 1
Motor output current sense pin
Motor output pin 2
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Input and Output Equivalent Circuit
IN1
IN2
Input / Output signal
Equivalent circuit
1 kΩ
Logic
input pin
Logic input (VIN(H)/VIN(L))
100kΩ
Pin name
VIN(H): 2.0 V (min) to 5.5 V (max)
VIN(L): 0 V (min) to 0.8 V (max)
GND
Internal power supply
VREF
VREF applied voltage range
0 V to 4.0 V
1 kΩ
VREF
VM
OUT1
OUT2
RS
Operating range of VM power supply
voltage
4.5 V (min) to 44 V (max)
OUT2
OUT1
OUT pin voltage
4.5 V (min) to 50 V (max)
RS
The equivalent circuit may be omitted or simplified for explanatory purposes.
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TB67H450FNG
Functional Description
Input and output function
IN1
IN2
OUT1
OUT2
Mode
L
L
OFF (Hi-Z)
OFF (Hi-Z)
H
L
H
L
Forward
L
H
L
H
Reverse
H
H
L
L
Brake
Stop
Standby mode after 1 ms
Current path: Forward rotation (OUT1 to OUT2), Reverse rotation (OUT2 to OUT1)
Standby mode
When both IN1 and IN2 pins are set to L for 1 ms (typ.), the operation mode translates to the standby mode.
Item
Min
Typ.
Max
Unit
Time to standby
0.7
1
1.5
ms
The following period in which both IN1 and IN2 pins are set to L is the standby transition period.
Do not change the input states during this period since the IC becomes unstable.
•
If [STOP] mode is used, set period of IN1 =L and IN2 =L to 0.7 ms or less.
•
If [Standby] mode is used, set period of IN1 =L and IN2 =L to 1.5 ms or more.
In standby mode, when IN1 or IN2 is set to H, the mode returns from the standby mode, and enters to the operation mode.
Maximum 30 μs is required for the return time from the standby release.
The OUT1 and OUT2 outputs operate after 30 μs (max) from the standby release.
0.7 ms
30 μs (max)
1.5 ms
IN1
IN2
OUT1
OUT2
H
L
H
L
OUT1: Hi-Z
OUT2: Hi-Z
OUT1: Hi-Z
OUT2: Hi-Z
OUT1: H
OUT2: L
Stop
mode
OUT1: H
OUT2: L
OUT1: Hi-Z
OUT2: Hi-Z
OUT1: H
OUT2: L
Standby
Standby Return
transition period mode time
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TB67H450FNG
Constant current PWM blanking time
In TB67H450FNG, the following blanking time is set to prevent a spike current and external noise which are generated
during driving a motor.
(1) tBLK
(2)
NFth
Charge
Fast
Slow
The timing charts or constants may be omitted or simplified for explanatory.
tBLK (For preventing incorrect detection of a spike current at changing from Decay to Charge): 3.6 μs (typ.): (1)
The blanking time, 400 ns (typ.) is also set for preventing an incorrect detection around setting current value (NFth).: (2)
The time widths shown in the above figure are the design values, and the values are not guaranteed.
*
Blanking time between Input signal and tBLK
The tBLK is intended to avoid inrush current detection. The TB67H450FNG not only can be controlled by constant current
PWM, but also by direct PWM; with IN control signals. Therefore the tBLK is set at each IN switch timing; shown with gray in
the timing chart below.
IN1
IN2
Iout
Timing charts may be simplified for explanatory purposes.
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Motor control (Constant current control)
Current waveform in Mixed Decay Mode and the setting
In case of constant current control, the OFF time (toff) is fixed to determine the current ripple (pulsating), and the rate of Mix
Decay Mode is 50 % in Fast Mode, and 50% in Slow mode.
toff (fixed)
toff / 2
toff / 2
NF detection
NFth
Iout
Charge
Fast
Charge
Slow
Charge Mode -> NF detection: Reaches setting current value ->
Fast Mode -> Mixed Decay Timing -> Slow Mode -> Charge Mode
If the output current is zero-detected during Fast mode, the output becomes High impedance.
Waveform in Mixed Decay Mode (Current waveform)
toff (fixed)
toff / 2
NFth
toff (fixed)
toff / 2
toff / 2
NF detection
toff / 2
NF detection
Iout
MDT (Mixed Decay Timing)
Timing charts may be simplified for explanatory purposes.
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Operation Mode of Output Transistor
VM
U1
ON
U1
U2
U1
U2
OFF
OFF
ON
OFF
OFF
L2
L1
L2
L1
ON
ON
OFF
ON
Load
RS pin
VM
U2
L1
OFF
VM
Load
RS pin
RRS
RS pin
L2
ON
RRS
RRS
Charge mode
A current flows into the motor coil.
Load
Fast mode
The energy of the motor coil
is fed back to the power
Slow mode
A current circulates around the
motor coil and this IC.
Operation Function of Output Transistor
Mode
U1
U2
L1
L2
Charge
ON
OFF
OFF
ON
Fast
OFF
ON
ON
OFF
Slow
OFF
OFF
ON
ON
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.
VM
VM
VM
U1
U2
U1
U2
U1
U2
OFF
ON
ON
OFF
OFF
OFF
L2
L1
L2
L1
ON
ON
Load
L1
ON
OFF
Load
OFF
RS pin
RS pin
Charge mode
A current flows into the motor
coil.
L2
ON
RS pin
RRS
RRS
Load
RRS
Fast mode
The energy of the motor coil
is fed back to the power
Slow mode
A current circulates around the
motor coil and this IC.
Mode
U1
U2
L1
L2
Charge
OFF
ON
ON
OFF
Fast
ON
OFF
OFF
ON
Slow
OFF
OFF
ON
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.
Note: In the timing of an output switching, the time to prevent a through current is predefined (200 ns to 300 ns (design
value)).
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TB67H450FNG
Calculation of Predefined Output Current
This IC controls a motor operation by PWM constant current control. The peak current value (setting current value) can be
determined by settings of the current-sensing resistor (RRS) and the reference voltage (Vref).
Iout (max) = Vref (gain)
×
Vref (V)
RRS (Ω)
Vref (gain) : The Vref decay rate is 1 / 10.0 (typ.).
Example: In case of 100% setting
When Vref is 3.0 V and RRS is 0.51 Ω, the motor constant current (Peak current) is calculated as:
Iout = 3.0 V / 10.0 / 0.51 Ω= 0.59 A
If the constant current control function is disabled, the RS pin should be connected to GND, and the voltage (1 to 5V) is
input to VREF pin.
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TB67H450FNG
Absolute Maximum Ratings (Ta = 25°C)
Characteristics
Symbol
Motor power supply (non active)
Motor power supply (active)
Motor output voltage
Motor output current
Rating
Unit
Remarks
50
V
Standby mode
-0.4 to 44
V
Operation mode
Vout
50
V
―
Iout
3.5
A
(Note 1)
VIN(H)
6.0
V
―
Logic input pin voltage
VIN(L)
-0.4
V
―
VREF pin voltage
Vref
0 to 5.5
V
―
Power dissipation
PD
2.85
W
(Note 2)
Operating temperature
Topr
-40 to 85
°C
―
Storage temperature
Tstg
-55 to 150
°C
―
Junction temperature
Tj
150
°C
―
Note 1: The maximum current value in normal operation should be used at 70% or less (Iout ≤ 2.45A) of the absolute
maximum ratings after thermal calculation. The maximum output current may be further limited in view of thermal
considerations, depending on ambient temperature and board conditions.
Note 2: On PCB (JEDEC 4 layers). When the ambient temperature exceeds above Ta =25°C, derate the power
dissipation by 22.8 mW/°C.
VM
Ta : Ambient temperature
Topr : Ambient temperature while the device is active.
Tj : Junction temperature while the device is active. The maximum junction temperature is limited by thermalshutdown
(TSD) circuitry. It is advisable to keep the maximum current below a certain level so that the maximum junction
temperature, Tj (max), will not exceed 120°C.
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 TB67H450FNG 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 Range (Ta=-40 to 85°C)
Characteristics
Symbol
Min
Typ.
Max
Unit
Remarks
Motor power supply voltage
VM
4.5
24
44
V
―
Motor output current
Iout
―
1.5
3.0
A
―
VIN(H)
2.0
―
5.5
V
H level of logic
VIN(L)
0
―
0.8
V
L level of logic
Input range of control logic
frequency
fLOGIC
―
―
400
kHz
IN1, IN2
Input range of Vref voltage
Vref
0
2.0
4.0
V
Constant current
drive
Logic input voltage
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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Electrical Characteristics 1 (Ta=25°C, VM=24 V unless otherwise specified)
Characteristics
Logic input pin
Input voltage
Input hysteresis
Logic input pin
Input current
HIGH
LOW
HIGH
LOW
Symbol
Test conditions
Min
Typ.
Max
Unit
VIN(H)
VIN(L)
VIN(HYS)
IIN(H)
IIN(L)
Logic input pins
Logic input pins
Logic input pins (Note 1)
Test logic input pins: 3.3 V
Test logic input pins: 0 V
2.0
0
100
―
―
―
―
―
33
―
5.5
0.8
300
55
1
V
V
mV
μA
μA
―
―
1
μA
―
3
4
mA
―
3.5
5
mA
―
―
1
μA
-1
―
―
μA
-5
0
5
%
0
―
1
μA
―
0.6
0.8
Ω
IM1
Current consumption
IM2
IM3
Motor output
Leakage current
High
IOH
Low
IOL
Output setting current accuracy
ΔIout
RS pin current
IRS
Output transistor
On-resistance between
drain and source
(High side + low side)
Ron(H+L)
Output: Open
Standby mode (IN1/IN2=Low)
Output: Open
Brake mode (IN1/IN2=High)
Output: Open
fPWM=30kHz
VM=50 V, Vout=0 V
Standby mode (IN1/IN2=Low)
VM=Vout=50 V
Standby mode (IN1/IN2=Low)
Iout=1.5 A
VRS=0V, VM=24 V
Standby mode (IN1/IN2=Low)
Tj=25°C, Forward direction
(High side + low side)
Iout=1.5 A
Note 1: VIN (HYS) is defined as the difference between VIN (H) and VIN (L). VIN (H) is the voltage when the voltage (VIN)
to the input pins (IN1 and IN2) is raised and the output pins (OUT1 and OUT2) change from H to L. VIN (L) is the
voltage when the VIN (H) is lowered and the output pins (OUT1 and OUT2) change from L to H.
VIN (HYS) = VIN (H) – VIN (L)
Note: The internal circuits are designed to avoid EMF or leakage current; when the logic signal is applied while the VM is
not supplied. Please consider the control signal timing before supplying the VM.
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Electrical Characteristics 2 (Ta =25°C, VM = 24 V, unless otherwise specified)
Characteristics
Symbol
Test conditions
Min
Typ.
Max
Unit
VREF pin input current
Iref
Vref=2.0 V
―
0
1
μA
Vref attenuation ratio
Vref(gain)
Vref=2.0 V
1/10.4
1/10
1/9.6
―
TjTSD
―
150
160
175
°C
Thermal shutdown (TSD) hysteresis
TjTSDhys
―
―
30
―
°C
UVLO voltage (Note 2)
VUVLO
At rising VM
3.8
4.0
4.2
V
UVLO hysteresis voltage
Vhys_uvlo
―
―
200
―
mV
ISD
―
4.1
4.9
5.7
A
Thermal shutdown (TSD) circuit operating
temperature (Note 1)
Over current detection (ISD) circuit
operating current (Note 3)
Note 1: Thermal shutdown (TSD) *auto return
When the junction temperature of the IC reaches the TSD threshold, the TSD circuit is triggered; the internal reset circuit
then turns off the output transistors. In order to avoid malfunction by switching etc., detection mask time is prepared inside
IC. Since the operating temperature of TSD circuit has a hysteresis width, the IC returns automatically when the junction
temperature is lowered to the temperature to return.
The TSD circuit is a backup function to detect a thermal error, therefore is not recommended to be used aggressively.
Note 2: Under voltage lockout (UVLO)
When the supply voltage to VM pin is 3.8V (typ.) or less, the internal circuit is triggered; the internal reset circuit then turns
off the output transistors. Once the UVLO is triggered, it can be cleared by reasserting the VM supply voltage to 4.0V (typ.)
or more
Note 3: Over current detection (ISD) *Latch operation
When the output current reaches the threshold, the ISD circuit is triggered; the internal reset circuit then turns off the output
transistors. In order to avoid malfunction by switching etc., detection mask time is prepared inside IC. Once the ISD circuit is
triggered, the IC is set to standby mode, and can be cleared by reasserting VM power supply, or a return operation after
setting to standby mode (After both pins of IN1 and IN2 are set to Low for 1.5 ms or more, IN1 pin or IN2 pin is set to High).
Additionally, the IC has a circuit as a short-circuit detection of output pins (OUT1 and OUT2) which are adjacent to RS pin, if
the voltage more than the threshold is applied to RS pin, the circuit turns off the output transistors.
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TB67H450FNG
Back-EMF
While a motor is rotating, there is a timing at which power is fed back to the power supply. At that timing, the motor current
recirculates back to the power supply due to the effect of the motor back-EMF.
If the power supply does not have enough sink capability, the power supply and output pins of the device might rise above
the rated voltages. The magnitude of the motor back-EMF varies with usage conditions and motor characteristics. It must be
fully verified that there is no risk that the TB67H450FNG or other components will be damaged or fail due to the motor
back-EMF.
Cautions on Overcurrent Shutdown (ISD) and Thermal Shutdown (TSD)
The ISD and TSD circuits are only intended to provide temporary protection against irregular conditions such as an output
short-circuit; they do not necessarily guarantee the complete IC safety.
If the device is used beyond the specified operating ranges, these circuits may not operate properly: then the device may be
damaged due to an output short-circuit.
The ISD circuit is only intended to provide a temporary protection against an output short-circuit. If such a condition persists
for a long time, the device may be damaged due to overstress. Overcurrent conditions must be removed immediately by
external hardware.
IC Mounting
Do not insert devices incorrectly or in the wrong orientation. Otherwise, it may cause breakdown, damage and/or
deterioration of the device.
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TB67H450FNG
AC Electrical Characteristics (Ta = 25°C, VM = 24 V, output load condition 6.8 mH/5.7 Ω,
unless otherwise specified)
Characteristics
Symbol
Test condition
Min
Typ.
Max
Minimum input pulse width
of IN1 and IN2
tw(H)
―
500
―
―
tw(L)
―
500
―
―
tr
―
30
60
120
Output transistor
tf
―
40
80
160
switching characteristics
tpLH
IN1 and IN2 - OUT
―
500
―
tpHL
IN1 and IN2 - OUT
―
500
―
Blanking time of noise
rejection
tBLK
―
―
3.6
―
μs
Fixed OFF time
toff
―
19
25
36
μs
Time to standby
tstby
IN1=IN2=Low
0.7
1
1.5
ms
―
―
―
30
μs
tISD(mask)
―
―
2.5
―
μs
tTSD(mask)
―
2.0
5.0
8.0
μs
Standby return time
Mask time of over current
detection (ISD)
Mask time of thermal
shutdown (TSD)
Unit
ns
ns
Timing chart of AC characteristics
tw(L)
Input
(IN1, IN2)
50%
50%
50%
tw(H)
tpLH
5V
tpHL
90%
90%
Output
(OUT1, OUT2)
50%
50%
tf
10%
10%
tr
Timing charts may be simplified for explanatory purposes.
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(Reference) Relation between Power dissipation and Ambient Temperature
PD - Ta
Ta (°C)
When mounted on the board (JEDEC 4 layers)
This value is dependent on a substrate pattern and mounting conditions. Moreover, when ambient temperature is high,
permissible power consumption becomes small.
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Package Dimensions
TB67H450FNG(O,N,EL
P-HSOP8-0405-1.27-002
(Unit: mm)
Weight 0.075g (typ.)
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TB67H450FNG
TB67H450FNG(O,EL)
P-HSOP8-0405-1.27-001
(Unit: mm)
Weight 0.075g (typ.)
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TB67H450FNG
Notes on Contents
(1) Block Diagrams
Some of the functional blocks, circuits, or constants in the block diagram may be omitted or simplified for explanatory
purposes.
(2) Equivalent Circuits
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory purposes.
(3) Timing Charts
Timing charts may be simplified for explanatory purposes.
(4) Application Circuits
The application circuits shown in this document are provided for reference purposes only. Thorough evaluation is
required, especially at the mass production design stage. Providing these application circuit examples does not grant
a license for industrial property rights.
IC Usage Considerations
Notes on handling of ICs
[1] 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 the device breakdown, damage or deterioration, and may result injury by
explosion or combustion.
[2] Use an appropriate power supply fuse to ensure that a large current does not continuously flow in case of
over current and/or IC failure. The IC will fully break down when used under conditions that exceed its
absolute maximum ratings, when the wiring is routed improperly or when an abnormal pulse noise occurs
from the wiring or load, causing a large current to continuously flow and the breakdown can lead smoke or
ignition. To minimize the effects of the flow of a large current in case of breakdown, appropriate settings, such
as fuse capacity, fusing time and insertion circuit location, are required.
[3] If your design includes an inductive load such as a motor coil, incorporate a protection circuit into the design
to prevent device malfunction or breakdown caused by the current resulting from the inrush current at power
ON or the negative current resulting from the back electromotive force at power OFF. IC breakdown may
cause injury, smoke or ignition.
Use a stable power supply with ICs with built-in protection functions. If the power supply is unstable, the
protection function may not operate, causing IC breakdown. IC breakdown may cause injury, smoke or
ignition.
[4] Do not insert devices in the wrong orientation or incorrectly.
Make sure that the positive and negative terminals of power supplies are connected properly.
Otherwise, the current or power consumption may exceed the absolute maximum rating, and exceeding the
rating(s) may cause the device breakdown, damage or deterioration, and may result injury by explosion or
combustion.
In addition, do not use any device that is applied the current with inserting in the wrong orientation or
incorrectly even just one time.
[5] Carefully select external components (such as inputs and negative feedback capacitors) and load components
(such as speakers), for example, power amp and regulator.
If there is a large amount of leakage current such as input or negative feedback condenser, the IC output DC
voltage will increase. If this output voltage is connected to a speaker with low input withstand voltage, overcurrent
or IC failure can cause smoke or ignition. (The over current can cause smoke or ignition from the IC itself.) In
particular, please pay attention when using a Bridge Tied Load (BTL) connection type IC that inputs output DC
voltage to a speaker directly.
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Points to remember on handling of ICs
(1) Over current Protection Circuit
Over current protection circuits (referred to as current limiter circuits) do not necessarily protect ICs under all
circumstances. If the over current protection circuits operate against the over current, clear the over current status
immediately.
Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings can cause the
over current protection circuit to not operate properly or IC breakdown before operation. In addition, depending on the
method of use and usage conditions, if over current continues to flow for a long time after operation, the IC may
generate heat resulting in breakdown.
(2) Thermal Shutdown Circuit
Thermal shutdown circuits do not necessarily protect ICs under all circumstances. If the thermal shutdown circuits
operate against the over temperature, clear the heat generation status immediately.
Depending on the method of use and usage conditions, such as exceeding absolute maximum ratings can cause the
thermal shutdown circuit to not operate properly or IC breakdown before operation.
(3) Heat Radiation Design
In using an IC with large current flow such as power amp, regulator or driver, please design the device so that heat is
appropriately radiated, not to exceed the specified junction temperature (Tj) at any time and condition. These ICs
generate heat even during normal use. An inadequate IC heat radiation design can lead to decrease in IC life,
deterioration of IC characteristics or IC breakdown. In addition, please design the device taking into considerate the
effect of IC heat radiation with peripheral components.
(4) Back-EMF
When a motor reverses the rotation direction, stops or slows down abruptly, a current flow back to the motor’s power
supply due to the effect of back-EMF. If the current sink capability of the power supply is small, the device’s motor
power supply and output pins might be exposed to conditions beyond absolute maximum ratings. To avoid this problem,
take the effect of back-EMF into consideration in system design.
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Revision history
Version
Notes
Revision date
1.0
New release
2019-04-01
2.0
Added Package
2019-12-02
3.0
Added the explanation to the standby mode
2020-11-26
Modified Note 3 of Electrical Characteristics 2
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2020-11-26
TB67H450FNG
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