TB67B008 series
TOSHIBA Bi-CD Integrated Circuit Silicon Monolithic
3-Phase PWM Driver for Sensorless Brushless
Motors
The TB67B008 is a three-phase PWM chopper driver for
sensorless brushless motors. It controls motor rotation speed by
changing the PWM duty cycle, based on the speed control input.
TB67B008FTG/TB67B008FNG: Rotation speed detecting signal
(FG_OUT) corresponds to 8pin and 23pin. 1ppr (1 pulse/1
electrical angle).
TB67B008AFTG/TB67B008AFNG: Lock detecting signal
(LD_OUT) corresponds to 8pin and 23pin. Normal state: High,
Abnormal state: Low.
TB67B008BFTG/TB67B008BFNG: Rotation speed detecting
signal (FG_OUT) corresponds to 8pin and 23pin. 3ppr (3 pulses/1
electrical angle).
TB67B008CFTG/TB67B008CFNG: Lock detecting signal
(LD_OUT) corresponds to 8pin and 23pin. Normal state: Low,
Abnormal state: High.
Packages of TB67B008FTG, TB67B008AFTG, TB67B008BFTG,
and TB67B008CFTG:WQFN24
Packages of TB67B008FNG, TB67B008AFNG,
TB67B008BFNG, and TB67B008CFNG: SSOP24
Products can be selected as usage.
TB67B008FTG, TB67B008FNG
TB67B008AFTG, TB67B008AFNG
TB67B008BFTG, TB67B008BFNG
TB67B008CFTG, TB67B008CFNG
P-WQFN24-0404-0.50-004
Weight: 0.04 g (typ.)
Features
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Sensorless drive in three-phase full-wave mode
PWM chopper control
Control based on the pulse duty input
Output current: Absolute maximum rating: 3 A
Power supply: Absolute maximum rating: 25 V
Adjustable output PMW duty
Lead angle control
Overlapping commutation (150°) and Soft switching
SSOP24-P-300-0.65A
Weight: 0.13g (typ.)
Rotation speed detecting signal (FG_OUT):1ppr:TB67B008FTG(8pin)/TB67B008FNG(23pin)
Lock detecting signal (LD_OUT):
Normality is High: Abnormality is Low:TB67B008AFTG(8pin)/TB67B008AFNG(23pin)
Rotation speed detecting signal (FG_OUT):3ppr:TB67B008BFTG(8pin)/TB67B008BFNG(23pin)
Lock detecting signal (LD_OUT):
Normality is Low: Abnormality is High:TB67B008CFTG(8pin)/TB67B008CFNG(23pin)
Adjustable startup settings
Forced commutation frequency control
Selectable PWM frequency
Restart
Overcurrent protection (ISD), thermal shutdown (TSD),and under voltage lockout (UVLO)
Current limiter
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2015-9-11
TB67B008 series
Pin Assignment (Top view)
·TB67B008FTG/TB67B008AFTG/TB67B008BFTG/TB67B008CFTG
OSCCR
VREG
ADJ2
14
18
SEL_ADJ
FST
TSTEP
TIP
TRE
GND
19
20
21
22
23
24
1
COM
17
16
15
ADJ1
13
12
11
ADJ0
TSP
LA
FPWM
FG_OUT/LD_OUT
VM
10
9
8
7
6
TEST
GND
2
U
VST
E-PAD
3
RS
4
V
5
W
Note 1: Design the pattern in consideration of the heat design because the back side (E-PAD (2.6 mm×2.6 mm)) have
the role of heat radiation. (The back side (E-PAD) should be connected to GND because they are connected to
the back of the chip electrically.)
·TB67B008FNG/TB67B008AFNG/TB67B008BFNG/TB67B008CFNG
LA
TSP
ADJ0
ADJ1
ADJ2
VREG
OSCCR
GND
VST
SEL_ADJ
FST
TSTEP
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
FPWM
FG_OUT/LD_OUT
VM
TEST
W
V
RS
U
COM
GND
TRE
TIP
2
2015-9-11
TB67B008 series
Pin Description
·TB67B008FTG/TB67B008AFTG/TB67B008BFTG/TB67B008CFTG
(WQFN24)
Pin No.
1
2
3
4
5
6
7
Symbol
COM
U
RS
V
W
TEST
VM
FG_OUT
I/O
I
O
―
O
O
―
―
O
O
I
I
I
I
I
I
―
―
―
I
I
I
―
―
―
―
Description
Connection pin for the center tap of the motor
U-phase output
Connection pin for output current detecting resistance
V-phase output
W-phase output
Test pin (Connect to GND pin)
Motor power supply pin
TB67B008FTG/TB67B008BFTG
Rotation speed output pin (open-drain)
TB67B008AFTG/TB67B008CFTG
Lock detecting signal output pin (open-drain)
PWM frequency select input
Lead angle setting input
Rotation speed command input (Pulse duty control)
Characteristics adjustment of input duty
Characteristics adjustment input of PWM output duty 1
Characteristics adjustment input of PWM output duty 2
Reference voltage output
Internal OSC setting pin
Ground connection pin
Duty cycle setting pin for DC excitation and forced commutation modes
PWM duty function setting input
Forced commutation frequency select input
PWM duty increasing time setting pin
Connection pin for a capacitor to set the DC excitation time
Connection pin for a capacitor to set the restart time
Ground connection pin
8
LD_OUT
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
FPWM
LA
TSP
ADJ0
ADJ1
ADJ2
VREG
OSCCR
GND
VST
SEL_ADJ
FST
TSTEP
TIP
TRE
GND
3
2015-9-11
TB67B008 series
·TB67B008FNG/TB67B008AFNG/TB67B008BFNG/TB67B008CFNG
(SSOP24)
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
Symbol
LA
TSP
ADJ0
ADJ1
ADJ2
VREG
OSCCR
GND
VST
SEL_ADJ
FST
TSTEP
TIP
TRE
GND
COM
U
RS
V
W
TEST
VM
FG_OUT
I/O
I
I
I
I
I
―
―
―
I
I
I
―
―
―
―
I
O
―
O
O
―
―
O
O
I
Lead angle setting input
Description
Rotation speed command input (Pulse duty control)
Characteristics adjustment of input duty
Characteristics adjustment input of PWM output duty 1
Characteristics adjustment input of PWM output duty 2
Reference voltage output
Internal OSC setting pin
Ground connection pin
Duty cycle setting pin for DC excitation and forced commutation modes
PWM duty function setting input
Forced commutation frequency select input
PWM duty increasing time setting pin
Connection pin for a capacitor to set the DC excitation time
Connection pin for a capacitor to set the restart time
Ground connection pin
Connection pin for the center tap of the motor
U-phase output
Connection pin for output current detecting resistance
V-phase output
W-phase output
Test pin (Connect to GND pin)
Motor power supply pin
TB67B008FNG/TB67B008BFNG
Rotation speed output pin (open-drain)
TB67B008AFNG/TB67B008CFNG
Lock detecting signal output pin (open-drain)
PWM frequency select input
23
LD_OUT
24
FPWM
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TB67B008 series
Functional Description
The equivalent circuit diagrams may be simplified or some parts of them may be omitted for explanatory
purposes.
Timing charts may be simplified for explanatory purposes.
1. Sensorless Drive Mode
Based on the TSP input for a startup operation, the rotor is aligned to a known position in DC excitation
mode. Then, the forced commutation signal is generated to start the motor rotation. As the motor rotates,
the back-EMF occurs in each phase of the coil. When an input signal indicating the polarity of three phase
voltage of the motor, including the back-EMF, is detected as a position signal, the motor driving signal is
automatically switched from forced commutation signal to the normal commutation PWM signal that is
based on the position signal input (back-EMF). Then, a BLDC motor starts running in sensorless
commutation mode.
1) Forward rotation direction switching
U
V
W
FG_OUT:TB67B008
One electrical angle
FG_OUT:TB67B008B
One electrical angle
2) Output of rotation speed signal: FG_OUT pin
TB67B008
Signal of 1 ppr (one pulse/one electrical angle) is outputted according to the motor induced voltage.
(*4-polar motor: 2 pulses are outputted per 1 motor rotation.)
TB67B008B
Signal of 3 ppr (one pulse/one electrical angle) is outputted according to the motor induced voltage.
(*4-polar motor: 6 pulses are outputted per 1 motor rotation.)
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2015-9-11
嵌入式系统
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