TB67H452FTG
TOSHIBA CD Process Integrated Circuit Silicon Monolithic
TB67H452FTG
PWM Chopper Type 4 ch H-bridge Motor Driver
The TB67H452FTG is a PWM chopper type 4 ch
H-bridge motor driver.
The TB67H452FTG can drive two steppers, two DC
brushed motors and one stepping motor, etc. by
combining 4 ch H-bridges. And it can also drive dual
DC brushed motors or stepping motors for
large-current drive by setting Large mode. Moreover,
QFN48-P-0707-0.50
VM power supply voltage can be used 6.3 V or more.
Weight: 0.137 g (typ.)
Therefore, it is optimal for battery powered
applications with 7.2 V power supply for example.
Features
●
Single-chip brushed DC motor driver for up to 4 motors
●
Single-chip bipolar stepping motor driver for up to 2 motors
●
Monolithic IC structured by CD process
●
Low ON-resistance: Ron = 0.6 Ω
In Large mode, H-bridges can be combined. ON-resistance (Ron) = 0.3 Ω.
●
Over-current detection (ISD), thermal shutdown (TSD), and VM power-on reset circuits
●
Since the IC incorporates a VCC regulator for internal circuit operation, an external logic
power supply (5 V) is not required
●
Package: QFN48
●
Maximum output withstand voltage: 40 V (max)
●
Output current: 3.5 A (peak) in DC Motor (S) mode
●
Chopping frequency can be set by external capacitor and resistor
High-speed chopping is possible at 100 kHz or more
©2017 TOSHIBA Corporation
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TB67H452FTG
Block Diagram (Brushed DC motor (S) × 4-ch mode)
Xch IN1/IN2
Xch PWM
SLEEP
VMR Detect
Step Decoder
(MODE0)
(MODE1)
(MODE2)
VCC
(Input Logic)
Chopper OSC
OSCM
tBLANK set pin
OSC
ALERT
Xch Vref input
VCC Voltage
Regulator
Current Level Set
(2 bit D/A)
(Torque Control)
CR-CLK
Converter
Current Feedback (×2)
VM
(VRS1)
RS COMP1
(VRS2)
RS COMP2
RS_X
Output Control
(Mixed Decay Control)
RS_X
ISD
Output
(H-Bridge ×2)
Output
(H-Bridge ×2)
VM
TSD
VMR
Detect
Detection Circuit
Note: Though pin functions are different depending on the used mode, they are indicated
according to the DC(S) ×4 mode in this document.
Note: "X" means the ellipsis of A, B, C, or D of each Ch. (Xch IN1/IN2, Xch PWM, Xch Vref
input, and RS_X)
Note: Number of RS pins is 8 in total.
Note: GND wiring: All the grounding wires of the TB67H452FTG should 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.
In controlling the setting pins for each mode by SW, those pins should be pulled up to
power supply like VCC or pulled down to GND not to go into a high-impedance (Hi-Z)
state.
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, OUT, GND, etc.) through which a
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TB67H452FTG
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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TB67H452FTG
Pin Assignment
PIN No.
Pin name
(1 ) Stepper(S)×2
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
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
MO_CD
CD_MODE2
OUT_CRS_C
RS_C
OUT_C+
OUT_D+
RS_D
RS_D
OUT_DCD_MODE1
VREF_A
VREF_B
VREF_C
VREF_D
OSCM
VCC
GND
VM
VM
SLEEP
ALERT
CLK_AB
ENABLE_AB
CLK_CD
ENABLE_CD
OUT_ARS_A
RS_A
OUT_A+
OUT_B+
RS_B
RS_B
OUT_BD_tBLANK_AB
NC
D_tBLANK_CD
MODE2
MODE1
MODE0
VM
VM
NC
CW_CCW_AB
MO_AB
AB_MODE2
AB_MODE1
CW_CCW_CD
CDch MO pin
CDch step resolution mode setting
Cch output pin(-)
Cch sensing Rs connection pin
Cch sensing Rs connection pin
Cch output pin(+)
Dch output pin(+)
Dch sensing Rs connection pin
Dch sensing Rs connection pin
Dch output pin(-)
CDch step resolution mode setting
Ach Vref input
Bch Vref input
Cch Vref input
Dch Vref input
ABch CLK input
ABch ENABLE input
CDch CLK input
CDch ENABLE input
Ach output pin(-)
Ach sensing Rs connection pin
Ach sensing Rs connection pin
Ach output pin(+)
Bch output pin(+)
Bch sensing Rs connection pin
Bch sensing Rs connection pin
Bch output pin(-)
ABch Decay setting pin
CDch Decay setting pin
"H" input fixed
"H" input fixed
"H" input fixed
ABch CW/CCW pin
ABch MO pin
ABch step resolution mode setting
ABch step resolution mode setting
CDch CW/CCW pin
(2) DC(L)×2
(3) Stepper(L)
(4) DC(S)×4
CDch ＩＮ 1 Pin
Cch IN 1 pin
Dch IN 2 pin
CDch output pin(-)
CDch sensing Rs Connection pin
CDch sensing Rs Connection pin
CDch output pin(+)
CDch output pin(+)
CDch sensing Rs Connection pin
CDch sensing Rs Connection pin
CDch output pin(-)
Dch IN 1 pin
ABch Vref input
Ach Vref input
Bch Vref input
Cch Vref input
CDch Vref input
Dch Vref input
Setting pin of oscillation circuit frequency for chopping
Monitoring pin for internal generated 5V bias
GND
VM power input pin
VM power input pin
Sleep pin
Alert pin
ABch PWM pin
CLK input
Ach PWM pin
ENABLE input
Bch PWM pin
CDch PWM pin
Cch PWM pin
Dch PWM pin
ABch output pin(-)
Ach output pin(-)
Ach sensing Rs connection pin
ABch sensing Rs connection pin
Ach sensing Rs connection pin
ABch sensing Rs connection pin
Ach output pin(+)
ABch output pin(+)
Bch output pin(+)
ABch output pin(+)
Bch sensing Rs connection pin
ABch sensing Rs connection pin
Bch sensing Rs connection pin
ABch sensing Rs connection pin
Bch output pin(-)
ABch output pin(-)
tBLANK setting pin
tBLANK setting pin
NC
tBLANK setting pin
CDch Decay setting pin
tBLANK setting pin
"H" input fixed
"H" input fixed
"H" input fixed
"H" input fixed
"L" input fixed
"L" input fixed
"L" input fixed
"H" input fixed
"L" input fixed
VM power input pin
VM power input pin
NC
ABch IN2 pin
CW/CCW pin
Ach IN2 pin
ABch IN1 pin
MO pin
Ach IN1 pin
Mode setting
Bch IN2 pin
Mode setting
Bch IN1 pin
CDch IN2 pin
Cch IN2 pin
(6) DC(S)×2
+
Stepper(S)
(5) DC(L)+Stepper（ S）
CDch MO pin
CDch step resolution mode setting
Cch output pin(-)
Cch sensing Rs connection pin
Cch sensing Rs connection pin
Cch output pin(+)
Dch output pin(+)
Dch sensing Rs connection pin
Dch sensing Rs connection pin
Dch output pin(-)
CDch step resolution mode setting
ABch Vref input
Ach Vref input
Bch Vref input
Cch Vref input
Cch Vref input
Dch Vref input
Dch Vref input
ABch PWM pin
Ach PWM pin
Bch PWM pin
CDch CLK input
CDch CLK input
CDch ENABLE input
CDch ENABLE input
ABch output pin(-)
Ach output pin(-)
ABch sensing Rs connection pin
Ach sensing Rs connection pin
ABch sensing Rs connection pin
Ach sensing Rs connection pin
ABch output pin(+)
Ach output pin(+)
ABch output pin(+)
Bch output pin(+)
ABch sensing Rs connection pin
Bch sensing Rs connection pin
ABch sensing Rs connection pin
Bch sensing Rs connection pin
ABch output pin(-)
Bch output pin(-)
tBLANK setting pin
"L" input fixed
"H" input fixed
"H" input fixed
CDch Decay setting pin
ABch IN2 pin
ABch IN1 pin
-
"L" input fixed
"H" input fixed
"L" input fixed
Ach IN2 pin
Ach IN1 pin
Bch IN2 pin
Bch IN1 pin
CDch CW/CCW pin
Note: In Large mode, please connect the corresponding pins to each other.
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TB67H452FTG
■Descriptions of Motor Drive Modes
(1)
Stepping Motor (S) × 2 ch mode
(2)
DC Motor (L) × 2 ch mode
(3)
Stepping Motor (L) × 1 ch mode
(4)
DC Motor (S) × 4 ch mode
(5)
Stepping Motor (S) × 1 ch mode + DC Motor (L) × 1 ch mode
(6)
Stepping Motor (S) × 1 ch mode + DC Motor (S) × 2 ch mode
Note: (L): Large mode (Large), (S): Small mode (Small).
Note: The digital tBLANK time of the modes including DC Motor (S) mode can be separately set
for each ch pair, A and B ch and C and D ch.
A and B ch: D_tBLANK_AB pin
C and D ch: D_tBLANK_CD pin
MODE (2, 1, 0) = (L, L, H) is provided only for Toshiba testing and must not be used
during normal operation.
Note: In Combination mode, such as Stepping Motor (L) and DC Motor (L) modes, the
impedance outside the IC should be balanced.
Note: In Large mode (Stepping Motor (L) or DC Motor (L)), outputs should be short circuit.
If the wiring impedance for each output transistor is different, the current that flows
through each output transistor becomes unbalanced and the current may exceed the
absolute maximum rating of the transistor. In this case, the IC may break down.
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TB67H452FTG
■H-bridge Combination (connection method) for Each Type of Motor Driver
●DC Motor (S) Combination
VM
Example
A-ch
OUT_A+
OUT_A-
Load
RS pin
RRS
GND
DC Motor (S) for single unit
…Motor output pin of the IC
●Stepping Motor(S) Combination
A-ch
OUT_A+
VM
B-ch
OUT_A-
Load
OUT_B+
RS pin
VM
Example
Load
OUT_B-
RS pin
RRS
RRS
GND
GND
Stepping Motor (S) for single unit
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●Stepping Motor(L) Combination
B-ch
A-ch
OUT_LAB+
(OUT_A+)
Load
OUT_LAB(OUT_A-)
VM
OUT_LAB(OUT_B-)
OUT_LAB+
(OUT_B+)
RS pin
Example
RS pin
RRS
GND
D-ch
C-ch
OUT_LCD+
(OUT_C+)
Load
VM
OUT_LCD+
(OUT_D+)
OUT_LCD(OUT_C-)
OUT_LCD(OUT_D-)
RS pin
RS pin
RRS
Stepping Motor (L) for single unit
7
GND
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TB67H452FTG
●DC Motor (L) Combination
B ch
A ch
OUT_LAB+
(OUT_A+)
Load
VM
Example
OUT_LAB+
(OUT_B+)
OUT_LAB(OUT_A-)
RS pin
OUT_LAB(OUT_B-)
RS pin
RRS
GND
DC Motor (L) for single unit
…Motor output pin of the IC
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TB67H452FTG
Output Control Circuit, Current Feedback Circuit, and Current Setting Circuit for Motor Driver
Note: Logic input pins are internally connected to pull-down resistors of about 100 kΩ.
Chopping reference
generating circuit
Output control circuit
Current
feedback
circuit
Decay
mode
NF set current
reached signal
Mixed decay
timing circuit
OSCM
counter
Mixed
decay
timing
OSC selector
Charge start
Current
setting
circuit
U1
Output stop signal
U2
Output control circuit
Output circuit
L1
L2
Output stop signal
Detection circuit
Output circuit
ISD
circuit
VM
VMR
circuit
VCC
VCCR
circuit
Stop signal
select
circuit
VMR (VM power monitor) circuit: When the VM exceeds the
specified value, it becomes High. When the VM is less than
the specified value, it becomes Low (internal status).
TSD
circuit
VCCR: VCC power monitor
VMR: VM power monitor
ISD: Over current detection
TSD: Thermal shutdown detection
ISD (over current detection) circuit: When the current, which
exceeds the specified value (exceeds the absolute maximum
ratings), flows in the motor output, the operation of the output
block is turned off. To cancellation the ISD protection, apply
the VM power supply again.
TSD (thermal shut down) circuit: TSD works when the IC is
heated abnormally (150°C (typ.)) and turns off all outputs of
motors. To cancellation the TSD protection, apply the VM
power supply again.
VCCR (VCC power monitor) circuit: When the VCC exceeds
the specified value, it becomes High. When the VCC is less
than the specified value, it becomes Low (internal status).
Detection circuit
Detection circuit
latched-data clear signal
Logic
9
POR (Power On Reset) circuit: When both VMR and VCCR
become High, the logic circuit is made active, and when VMR
and VCCR become other than High, the logic circuit is made
stop.
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TB67H452FTG
Output Equivalent Circuit of A/B-unit (C/D-unit is same as A/B-unit.)
VM
VM
Power supply
for upper drive
output
(UGATE)
U1
U2
U1
U2
From output
L1
control circuit
L2
OUT_A+
Output driver
circuit
L1
L2
OUT_A-
A ch
RS_A
Power supply
for upper drive
output
(UGATE)
U1
RRSA
U2
U1
U2
From output L1
control circuit L2
OUT_B+
Output driver
circuit
L1
L2
M
OUT_B-
B ch
RS_B
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RRSB
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1. Function of Motor Drive Mode Selection
Motor drive modes can be selected depending on the type of motors.
The configuration of H-bridge drivers and control category are changed according to the
selected mode.
Basically, driving mode will not be changed during operation. Thus, the TB67H452FTG does
not support dynamic mode switching.
When configurations of these pins are changed, the functions and timing of control pins are
changed.
The combination of mode select pins must not be changed after the TB67H452FTG is powered
on.
MODE0 pin
MODE1 pin
MODE2 pin
Motor Drive Mode
H
L
H
L
H
L
H
L
H
H
L
L
H
H
L
L
H
H
H
H
L
L
L
L
Stepping Motor (S) × 2
DC Motor (L) (Combination) × 2
Stepping Motor (L) (Combination) × 1
DC Motor (S) × 4
DC Motor (L) (Combination) × 1 + Stepping Motor (S)
DC Motor (S) × 2 + Stepping Motor (S)
Inhibited (For Toshiba testing only)
Standby mode
● Brushed DC Motor Mode (DC Motor (L or S))
This mode is used to drive brushed DC motors.
The tBLANK can be switched a fixed analog value, or the digital tBLANK mode in which the
blanking time is 4 CLK of the chopping reference OSC frequency.
When DC motors are driven under PWM control, a discharge current spike can be generated
due to a varistor. To prevent this current spike from erroneously tripping the constant-current
detection, the constant-current detection is digitally blanked for a period of time that is
determined by tBLANK. Digital tBLANK time is based on the OSC signal.
Using this blanking function enables constant-current limiter control, as well as external PWM
control. However, an over-current phenomenon can be observed only during blanking times.
● Stepping Motor Mode (Stepping Motor (L or S))
This mode is used to drive stepping motors.
The tBLANK time is specified as a fixed analog value (about 300 ns).
Each motor is controlled via two logic control inputs, PHASE (current direction) and ENABLE
(ON/OFF), and via the Vref input for constant-current control.
● Combination Mode (Large Mode)
The Combination mode, such as DC Motor (L) and Stepping Motor (L) modes, can be selected
when two units of H-bridges with the same characteristics are operated in parallel.
In this mode, the actual ON-resistance is reduced by half while the current capability is
doubled. (Specifications actually include the thermal capacitance as well. See electrical
characteristics for more details.)
To use this mode, the power supply, ground, and output pins that have identical names should
be shorted together on the board.
At the same time, the wirings of a board should be routed to balance the impedance at each pin.
Otherwise, the shorted pins may experience a current imbalance and more current may flow
into either one of them than the other.
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2. Control Signal Functions in Brushed DC Motor Mode
*In DC Motor (S) mode
Control input
X-ch IN1
X-ch IN2
H
H
L
H
H
L
L
L
State of output stage
X- ch PWM pin
H
L
H
L
H
L
H
L
OUT_X+
OUT_X-
Mode
L
L
Short brake
L
L
H
L
OFF
(Hi-Z)
H
L
L
L
OFF
(Hi-Z)
Forward/Reverse
Short brake
Reverse/Forward
Short brake
Stop
Note: "X" means the ellipsis of A, B, C, or D of each Ch. (X-ch IN1, X-ch IN2, X-ch PWM pin,
OUT_X+, and OUT_X-)
Note: When PWM pin is not used, fix it to high level.
● External PWM Control Function
The motor speed can be controlled by applying 0 V and 5 V (higher than TTL level) PWM signals
to the PWM pin.
In PWM mode, the PWM chopper circuit alternates between on and short brake.
When the PWM speed control is not required, the PWM pin (short brake pin) should be held High.
When the constant-current limiter is used, the TB67H452FTG enters 37.5% Mixed Decay mode
after an output current reaches the predefined current value. Since the blanking time is
internally inserted to prevent a shoot-through current eliminating, a special configuration is not
required.
The short brake function is disabled in Stepping Motor mode (Large or Small).
Stepping motors can also be driven in Brushed DC motor mode.
To perform such operation, the short brake function should not be used and the digital tBLANK
pin should be set Low.
At the same time, input signal functions should also be confirmed.
3. D_tBLANK Function (DC Motor Mode only)
D_tBLANK_AB
D_tBLANK_CD
L
H
Motor Drive Mode
OFF: Digital Blanking Time = OSC×0
ON: Digital Blanking Time = OSC×4
* When it is set to “L”, blanking time corresponds to only analog tBLANK width.
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TB67H452FTG
4. Signal Control Function in Stepping Motor Mode
(1)
CLK Function
The electrical angle leads one by one in the manner of the clocks. The clock signal is
reflected to the electrical angle on the rising edge.
CLK_AB
CLK_CD
↑
↓
(2)
Function
The electrical angle leads one by one on the rising edge
— (keeps former state)
ENABLE Function
The ENABLE pin controls ON and OFF of the current flow for stepping motors. This pin
controls whether the motor is stopped in Off mode or activated. It should be fixed to Low at
power-on or shut-down of the TB67H452FTG.
ENABLE_AB
ENABLE_CD
H
L
(3)
Function
Output transistors are enabled (normal operation mode).
Output transistors are disabled (high impedance: Z).
CW/CCW Function and output pin function (Output logic at charge start)
The CW/CCW pin switches rotation direction of stepping motors.
CW_CCW_AB
CW_CCW_CD
X(Note1)
H
L
Input function
L
Clock-wise (CW)
Counter clock-wise (CCW)
OUT_X+
(Note2)
OFF
H
L
OUT_X(Note2)
OFF
L
H
Note1: X: Don't care
Note2: "X" means the ellipsis of A, B, C, or D of each Ch. (OUT_X+, and OUT_X-)
(4)
Function of step resolution
AB_MODE1
CD_MODE1
AB_MODE2
CD_MODE2
L
L
L
H
H
H
L
H
Function
Fixed electrical angle
(Initial setting of Full step: 45°)
Half step
Full step
Quarter step
In the case of AB/CD_MODE1=L, and AB/CD_MODE2=L, the electrical angle is reset and
fixed to 45°, which is the initial value in the full step mode.
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5. Decay Switching Function (Stepping Motor only)
D_tBLANK_AB
D_tBLANK_CD
L
H
Constant current control mode
Mixed Decay: 37.5% fixed
Mixed Decay: 12.5% (During the current decay: 37.5%)
6. SLEEP Function
The low power consumption mode (VCC OFF) and the normal operation mode (VCC ON) can be
controlled by this pin.
When SLEEP pin is Low, VCC regulator is turned OFF, completely logic will stop.
After SLEEP pin is set to High, it can return to the normal operation mode in 1 ms.
SLEEP
L
H
Drive Mode
Low power consumption mode (VCC OFF)
Normal operation mode (VCC ON)
7. ALERT Function
The ALERT pin will output “Low” level when error detection (TSD or ISD) turns off the IC
operation.
5V
10 kΩ
The ALERT pin is an open drain output pin. When the output pin is pulled up to the VCC with
a resistor, the Low is outputted (MOSFET ON) at the Reset, and the High (internal Hi-Z) is
outputted at the non-reset.
Please connect it to the VCC pin for pull-up.
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TB67H452FTG
●Absolute Maximum Ratings (Ta=25°C)
Characteristics
Motor power supply
Motor output voltage
Motor output current (Note 1)
Internal Logic power supply
Logic input voltage
Power dissipation (single) (Note 2)
Operating temperature
Storage temperature
Junction temperature
Symbol
VM
VOUT
IOUT_(ST_S)
IOUT_(ST_L)
IOUT_(DC_S)
IOUT_(DC_L)
VCC
VIN(H)
VIN(L)
Rating
40
40
3.5
5.0
3.5
5.0
6.0
6.0
-0.4
Unit
V
V
A
A
A
A
V
V
V
PD
TOPR
TSTR
Tj(max)
1.3
-20 to 85
-55 to 150
150
W
°C
°C
°C
Remarks
—
—
(tw ≤ 500 ns)
(tw ≤ 500 ns)
(tw ≤ 500 ns)
(tw ≤ 500 ns)
—
—
—
—
—
—
—
Note 1: As a guide, the maximum output current should be kept below 1.4 A per phase. The
maximum output current may be further limited in view of thermal considerations,
depending on ambient temperature and board conditions.
Note 2: Stand-alone (Ta =25°C)
When Ta exceeds 25°C, it is necessary to do the derating with 10.4 mW/°C.
Ta: Ambient temperature
Topr: Ambient temperature while the TB67H452FTG is active
Tj:
Junction temperature while the TB67H452FTG is active. The maximum junction
temperature is limited by the thermal shutdown (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 TB67H452FTG 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.
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TB67H452FTG
Operating Ranges(Ta=0 to 85°C)
Characteristics
Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Internal logic power supply
voltage
VCC
DC
(Automatically
generated)
4.5
5.0
5.5
V
Motor power supply voltage
VM
DC
—
6.3
24
38
V
Iout
(ST_S)
DC
Ta = 25°C, per phase
—
0.8
1.5
Iout
(ST_L)
DC
Ta = 25°C, per phase
—
1.5
2.1
Iout
(DC_S)
DC
Ta = 25°C, per phase
—
1.0
2.0
Iout
(DC_L)
DC
Ta = 25°C, per phase
—
2.0
3.8
Logic input voltage
VIN
DC
—
GND
3.3
5.0
V
Chopping frequency setting
range
fchop
DC
VCC=5.0 V
40
100
150
kHz
Vref voltage
Vref
DC
VM=24 V
GND
3.0
4.0
V
Current detect pin voltage
VRS
DC
VM=24 V
0
±1.0
±1.5
V
Motor output current
A
Note: Use the maximum junction temperature (Tj) at 120°C or less. The maximum current
cannot be used under certain thermal conditions.
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Electrical Characteristics 1 (Unless otherwise specified, Ta=25°C, VM=24 V)
Test
Circuit
Test Condition
Min
Typ.
Max
DC
Logic input pins
(Other than SLEEP pin)
2.2
—
5.5
GND
—
0.8
DC
SLEEP pin only
2.0
—
5.5
GND
—
0.6
DC
Logic input pins
0.3
0.4
0.5
DC
VIN=5 V, Input pins with
resistor
—
50
75
—
—
1
DC
IOL=4 mA output: Low
—
—
0.5
IM1
Output=OPEN
(ENABLE ALL=L),
MOSFET=OFF
—
2
3
IM2
Output=OPEN,
fPWM=100 kHz
Logic operate,
MOSFET=OFF
—
3.5
5
IM3
Output=OPEN
Function mode(Full step)
—
8
10
IM4
SLEEP=L
VCC regulator = OFF
—
10
20
μA
Upper
side
IOH
VM=24 V, Vout=0 V,
ENABLE ALL=L
−1
—
—
μA
Lower
side
IOL
VM=Vout=24 V,
ENABLE ALL=L
—
—
1
μA
Characteristics
Symbol
Logic input voltage
(Other than SLEEP
pin)
Logic input voltage
(SLEEP pin only)
High
VIH
Low
VIL
High
VIH
Low
VIL
Logic input hysteresis voltage
Logic input current
MO,ALERT output voltage
Current consumption
(VM line)
Output leakage
current
His
IIN(H)
IIN(L)
VOL
DC
DC
Unit
V
V
V
μA
V
mA
Output current differential
⊿Iout1
DC
Iout=1.0 A
−5
—
5
%
Output current setting differential
⊿Iout2
DC
Iout=1.0 A
−5
—
5
%
RS pin current
IRS
DC
VRS=0 V, VM=24 V,
ENABLE ALL=L
(MOSFET = OFF)
—
—
10
μA
0.4
0.6
0.8
DC
Iout=1.0 A,
Tj=25°C, Drain-source,
(upper + Lower)
Small Mode
Iout=1.0 A,VCC=5.0 V,
Tj=25°C, Drain-source,
(upper + Lower)
Large Mode
Output transistor drain-source
ON-resistance (upper + lower)
Ron (DS:
upper +
lower) S
Ron (DS:
upper +
lower) L
17
Ω
—
0.3
0.4
2017-05-09
TB67H452FTG
Electrical Characteristics 2 (Unless otherwise specified, Ta=25°C, VM=24 V)
Test Condition
Min
Typ.
Max
Unit
VREF
IREF
VCC
ICC
VREF(gain)
TjTSD
VMR
Test
Circuit
DC
DC
DC
DC
DC
DC
DC
VM=24 V, VCC=5 V
VREF=3.0 V
ICC=5.0 mA
VCC=5.0 V
VREF=2.0 V
—
—
GND
—
4.5
—
1/5.2
140
5.5
3.0
0
5.0
2.5
1/5.0
150
5.7
4.0
1
5.5
5
1/4.8
170
6.0
V
μA
V
mA
—
°C
V
ISD
DC
—
2.1
4.0
5.0
A
Characteristics
Symbol
Vref input voltage
Vref input current
VCC output voltage
VCC output current
Vref attenuation ratio
TSD temperature (Note 1)
VM return voltage
Detection current of over-current
detection circuit (Note 2)
Note 1: Thermal shutdown detection (TSD) circuit
When the IC junction temperature reaches the specified value and becomes overheated, the
TSD circuit is activated and the internal reset circuit is activated to turn off all of the
outputs.
The TSD circuit operates between 140°C (min) to 170°C (max) (design value). When the
TSD circuit is operating, the IC operation can be returned by re-starting the VM power
supply or setting the standby mode. The TSD function aims at detecting abnormal heating
of ICs. Please avoid positively using the TSD function.
Note 2: Over current detection (ISD) circuit
When the output current exceeds the specified value, the ISD circuit judges it as an
abnormal condition and the internal reset circuit is activated to turn off all the outputs.
The blanking time is set to avoid the incorrect operation by switching. (For details, refer to
“ISD Blanking Time and ISD Operating Time.”) When the ISD function is operating, the
output is stopped until power-on-reset of the VM power supply. It can be returned by
re-starting the VM power supply or setting the standby mode. The ISD function aims at
detecting abnormal current of ICs. Please avoid positively using the ISD function.
Note 3: The internal circuits are designed to avoid EMF or leakage current, when the logic signal is
inputted while the VM voltage is not supplied. But for avoid operating the motor at the
timing of resupply, please control the logic signal timing correctly before the VM power is
resupplied.
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 device or other components will be damaged or
fail due to the motor back-EMF.
Cautions on Over current detection (ISD) and Thermal shutdown detection (TSD)
●
The ISD and TSD circuits are only intended to provide temporary protection against
irregular conditions such as an output short-circuits, 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 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 in the wrong orientation or incorrectly. Otherwise, it may cause device
breakdown, damage and/or deterioration.
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AC Electrical Characteristics (Ta = 25°C, VM = 24 V, Load = 6.8 mH/5.7Ω)
Characteristics
Symbol
Test
Circuit
Test Condition
Min
Typ.
Max
Unit
Logic input frequency
fLogic
AC
—
1.0
—
200
kHz
AC
—
300
—
—
250
—
—
60
120
200
30
70
130
—
120
500
—
120
500
CLK input internal filter width
tCLK(H)
tCLK(L)
tr
Output transistor switching
characteristic
tf
tpLH
Output load: 6.8 mH/5.7 Ω
AC
Between Signal to OUT
Output load: 6.8 mH/5.7 Ω
tpHL
tBLANK_AB(L)
Noise rejection blanking time
tBLANK_CD(L)
tBLANK_AB(H)
tBLANK_CD(H)
ns
ns
AC
Iout=0.6 A,VM=24 V,
Analog tBLANK width
450
550
700
ns
AC
Iout=0.6 A,OSC=1.6 MHz,
4×OSC setting
2.0
2.5
3.0
μs
COSC=270 pF,ROSC=120 kΩ
1200
1600
2000
kHz
40
100
150
kHz
—
100
—
kHz
OSCM reference signal
oscillation frequency
fOSCM
AC
Chopping frequency range
fchop
AC
Chopping frequency
fchop
AC
Output operation (Iout=1.0
A)
Output operation (Iout=1.0
A)
OSC=1.6 MHz
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TB67H452FTG
Decay Mode: Charge⇒Slow⇒Fast
CR pin
Internal CLK
Waveform
fchop
DECAY MODE
Setting current
NF
37.5%
MIXED
DECAY
MODE
MDT
CHARGE MODE → NF: Reach setting current → SLOW MODE →
MIXED DECAY TIMMING → FAST MODE → Monitoring current →
(Setting current > Output current) CHARGE MODE
Charge
RNF
Fast
Slow
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TB67H452FTG
Mixed Decay Mode / Detecting zero point
CR pin
Internal CLK
Waveform
fchop
DECAY MODE
Setting current
NF
37.5%
MIXED
DECAY
MODE
MDT
CHARGE MODE → NF: Reach setting current → SLOW MODE →
MIXED DECAY TIMMING → FAST MODE → Monitoring current →
(In case setting current > Outputting current) CHARGE MODE
Charge
Charge
RNF
Fast
Slow
Fast
Slow
(1)
(2)
Iout=0
OFF
Blanking time
The [NF] shows the point of which the output current reaches the setting current value. The
[Charge] shows the different value depending on the step resolution characteristics such as
inductance and resistance.
Status (1): When the mode moves from Fast to Charge before reaching zero point (Iout=0 A)
Status (2): When reaching zero point (Iout=0 A)
Mixed Decay mode: Charge->NF: Reaching setting current->Slow->Fast->Charge->...
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TB67H452FTG
Output Transistor Operating Modes
VM
VM
U1
ON
U2
U1
U2
U1
U2
OFF
OFF
OFF
OFF
ON
L2
L1
ON
ON
Load
L1
OFF
RS pin
RRS
VM
Load
L2
Load
L1
ON
ON
RRS
Charge Mode
A current flows into the
motor coil.
GND
RRS
Slow Mode
A current circulates
around the motor coil
and this device.
OFF
RS pin
RS pin
GND
L2
GND
Fast Mode
The energy of the motor
coil is fed back to the
power supply.
Output Transistor Operating Function
CLK
Charge Mode
Slow Mode
Fast Mode
U1
ON
OFF
OFF
U2
OFF
OFF
ON
L1
OFF
ON
ON
L2
ON
ON
OFF
CLK
Charge Mode
Slow Mode
Fast Mode
U1
OFF
OFF
ON
U2
ON
OFF
OFF
L1
ON
ON
OFF
L2
OFF
ON
ON
Note: Above table shows an example of when the current flows as indicated by the
arrows in the figures shown above. If the current flows in the opposite
direction, refer to the following table.
The TB67H452FTG switches among Charge, Slow and Fast modes automatically for
constant-current control.
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for
explanatory purposes.
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TB67H452FTG
Calculation of the Setting Output Current
For PWM constant-current control, the TB67H452FTG uses a clock generated by OSCM
oscillator. The peak output current can be set via the current-sensing resistor (RRS) and the
reference voltage (Vref), as follows:
Vref (V)
Iout (Max) = Vref (gain) x
RRS (Ω)
Vref (gain): Vref decay ratio is 1 / 5.0 (typ.).
Ex.: In case of 100% setting,
When Vref = 3.0 V, Torque = 100%, and RRS = 0.51 Ω,
constant current output of the motor (peak current) is calculated as follows;
Iout = 3.0 V / 5.0 / 0.51 Ω= 1.18 A.
OSCM oscillation frequency
For OSCM oscillation frequency, the frequency can be changed by an external capacitor and
resistor.
By changing the frequency of the OSCM, the chopping frequency can be changed.
Please adjust the chopping frequency by referring to the following table.
Chopping [kHz]
150
140
130
120
110
100
90
80
70
60
50
40
C [pF]
150
180
180
220
180
270
330
330
390
470
560
820
23
R [kΩ]
180
100
150
100
220
120
68
130
130
120
180
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TB67H452FTG
PD – Ta (Package Power Dissipation)
PD – Ta
3.5
Power dissipation PD (W)
3
2.5
(2)
2
1.5
(1)
1
0.5
0
0
25
50
75
100
125
150
Ambient temperature Ta (°C)
(1)
Stand-alone: Rth (j-a): 113°C/W
(2)
When mounted on the board
(size: 100 mm×200 mm×1.6 mm, 2-layer board :37°C/W (typ.))
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TB67H452FTG
Operating Time for Over-current Detection Circuit
ISD Blanking Time and ISD Operating Time
CR oscillation
(Chopping reference waveform)
MIN
(Blanking time)
ISD BLANK time
Output stops
MIN
MAX
MAX
ISD operation time
When over-current starts to flow into the output stage (Over-current state starts)
The over-current detection circuit has a blanking time to prevent erroneous detection of IRR or
spike current at switching. The blanking time, which is synchronized with the frequency of the
OSC for setting chopping frequency, is calculated as follows.
Blanking time = 4×CR cycle
Time required to stop the output after over-current flows into the output stage is calculated as
follows.
Minimum time: 4×CR time
Maximum time: 8×CR time
Note that the above-mentioned operating times are achieved only when over-current flows as it
is expected. Depending on the timing of output control mode, the circuit may not be triggered.
Thus, to ensure safe operation, please insert a fuse in the VM power supply.
The capacity of the fuse is determined according to the usage conditions. Please select
appropriate fuse whose capacity does not exceed the power dissipation of the IC.
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TB67H452FTG
● tBLANK (noise rejection blanking time)
The TB67H452FTG has two different blanking times in accordance with different motors so as
to prevent noise malfunctions in switching.
(1)
Analog tBLANK Functions (in Stepping Motor Mode)
The noise rejection blanking time (analog tBLANK) defined by the AC characteristics of
the motor is fixed in the IC. It is mainly used to avoid misjudging the IRR (diode recovery
current) when a stepping motor is driven with constant current.
It cannot be changed because it is the fixed value of the IC.
(2)
Digital tBLANK (in Brushed DC Motor mode)
Apart from the analog tBLANK which is set by the initial mode selection, the digital
tBLANK time is created digitally from an external chopping period. This blanking time is
used to prevent false detections of a varistor recovery current generated during PWM
operation of DC motors in DC Motor mode.
When stepping Motor mode is selected by the mode select pins, the digital tBLANK time
is nullified (0 μs) and the analog tBLANK time, which is internally fixed, becomes
effective.
Since this blanking time is created based on the OSCM signal, the time can be adjusted
by changing the OSCM signal frequency.
(Please note that the characteristics other than the blanking time, such as motor
chopping frequency and the blanking time inserted at power on are also changed when
the OSCM signal frequency is changed.)
● Digital tBLANK Insertion Timing in Brushed DC Motor Mode
Digital
tBLANK
Digital
tBLANK
Digital
tBLANK
Digital
tBLANK
PWM
Decay
Decay
Decay
Iout
Charge
Iout=0
PWM switching point
Charge start timing in constant-current control
PWM switching point
The digital tBLANK time is inserted immediately after the switching timing of externally
applied PWM signals (CLK_X and ENABLE_X) such as the switching timing between short
brake and charging, and also when the charging in constant-current chopper drive is started.
The digital tBLANK time becomes effective only in DC Motor mode.
Decay Mode during DC motor drive is 37.5% Mixed-Decay mode. However, the operation is in
Charge mode for the first 4 CLK cycles of the whole period, which corresponds to the digital
tBLANK. Thus, depending on the timing, the operation mode might be switched directly to
Fast-Decay mode.
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TB67H452FTG
Application circuit example
The values shown in the following figure are typical values. For input conditions, see the
Operating Ranges.
DC Motor (S)×4 mode
MODE(2,1,0)=(H,L,L)
M
M
M
M
120 kΩ
1 μF
0.1 μF
100 μF
270 pF
0.1 μF
0.1 μF
0.1 μF
0.1 μF
VM
Note: It is recommended that a bypass capacitor is added if necessary. The GND wiring must
become one-point-earth as much as possible.
The example of an applied circuit is for reference, and enough evaluation should be done before
the mass-production design.
Toshiba does not grant any license to any industrial property rights by providing these
examples of application circuits.
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2017-05-09
TB67H452FTG
Package Dimensions
QFN48-P-0707-0.50
Unit: mm
Weight: 0.137 g (typ.)
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TB67H452FTG
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.
Toshiba does not grant any license to any industrial property rights by providing these
examples of application circuits.
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)
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.
(3)
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 Fast-blow fuse capacity, fusing time and insertion circuit location, are
required.
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2017-05-09
TB67H452FTG
(4)
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.
(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 capacitor,
the IC output DC voltage will increase. If this output voltage is connected to a speaker
with low input withstand voltage, over-current 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.
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 rotates in the reverse 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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TB67H452FTG
RESTRICTIONS ON PRODUCT USE
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this document, and related hardware, software and systems (collectively "Product") without notice.
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TOSHIBA's written permission, reproduction is permissible only if reproduction is without alteration/omission.
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responsible for complying with safety standards and for providing adequate designs and safeguards for their hardware, software and
systems which minimize risk and avoid situations in which a malfunction or failure of Product could cause loss of human life, bodily injury
or damage to property, including data loss or corruption. Before customers use the Product, create designs including the Product, or
incorporate the Product into their own applications, customers must also refer to and comply with (a) the latest versions of all relevant
TOSHIBA information, including without limitation, this document, the specifications, the data sheets and application notes for Product
and the precautions and conditions set forth in the "TOSHIBA Semiconductor Reliability Handbook" and (b) the instructions for the
application with which the Product will be used with or for. Customers are solely responsible for all aspects of their own product design
or applications, including but not limited to (a) determining the appropriateness of the use of this Product in such design or applications;
(b) evaluating and determining the applicability of any information contained in this document, or in charts, diagrams, programs,
algorithms, sample application circuits, or any other referenced documents; and (c) validating all operating parameters for such designs
and applications. TOSHIBA ASSUMES NO LIABILITY FOR CUSTOMERS' PRODUCT DESIGN OR APPLICATIONS.
• PRODUCT IS NEITHER INTENDED NOR WARRANTED FOR USE IN EQUIPMENTS OR SYSTEMS THAT REQUIRE
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limitation, equipment used in nuclear facilities, equipment used in the aerospace industry, medical equipment, equipment used for
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products (mass destruction weapons). Product and related software and technology may be controlled under the applicable export laws
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including without limitation, the EU RoHS Directive. TOSHIBA ASSUMES NO LIABILITY FOR DAMAGES OR LOSSES OCCURRING
AS A RESULT OF NONCOMPLIANCE WITH APPLICABLE LAWS AND REGULATIONS.
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