TB9060FN
2002-09-11
1
TOSHIBA CMOS Digital Integrated Circuit Silicon Monolithic
TB9060FN
3-Phase Full-Wave Sensorless Controller for Brushless DC Motors
The TB9060FN is a 3-phase full-wave sensorless controller for
brushless DC motors. It is capable of controlling voltage by PWM
signal input. When combined with various drive circuits, it can be
used for various types of motors.
Features
3-phase full-wave sensorless drive
PWM control (PWM signal is applied externally.)
Turn-on signal output current: 20 mA
Overcurrent protection function
Forward/reverse modes
Lead angle control function (0, 7.5, 15 and 30)
Lap turn-on function
Two types of PWM output (upper PWM and upper/lower alternate PWM)
Rotational speed sensing function
Weight: 0.10 g (typ.)
Preliminary
TB9060FN
2002-09-11
2
Block Diagram
Pin Assignment
Turn-on
signal
forming
circuit
Position
detection circuit
Overcurrent
protection circuit
Timing
control
Clock generator
circuit
Rotation instruction
circuit
Lead angle
setting circuit
PWM control
OUT_UP
OUT_VP
OUT_WP
OUT_UN
OUT_VN
OUT_WN
OUT_FG
OC
WAVE
V
DD
TEST
GND
SEL_BIT0
SEL_BIT1
SEL_LAP
SEL_OUT
PWM
CW_CCW
LA0
LA1
XTin
XT
6
7
9
5
3
4
1
2
11
10
13
12
8
15
16
17
19
20
21
14
23
24
24
23
22
21
20
19
18
1
2
3
4
5
6
7
17
16
15
14
13
8
9
10
11
12
LA0
LA1
PWM
CW_CCW
SEL_OUT
SEL_BIT0
SEL_BIT1
TEST
SEL_LAP
XT
XTin
GND
WAVE
OC
NC
OUT_WN
OUT_VN
OUT_UN
NC
OUT_WP
OUT_VP
OUT_UP
OUT_FG
V
DD
TB9060FN
TB9060FN
2002-09-11
3
Pin Description
Pin No.
Symbol
I/O
Description
1
LA0
I
2 LA1 I
Lead angle setting signal input pin
LA0
=
Low, LA1
=
Low: Lead angle 0
LA0
=
High, LA1
=
Low: Lead angle 7.5
LA0
=
Low, LA1
=
High: Lead angle 15
LA0
=
High, LA1
=
High: Lead angle 30
Built-in pull-down resistor (100 k
W
)
3 PWM I
PWM signal input pin
Applies active low PWM signal
Built-in pull-up resistor (100 k
W
)
Disables input of duty-100% (low) signal
High for 250 ns or longer is required.
4 CW_CCW I
Rotation direction signal input pin
High: Reverse (U
W
V)
Low, Open: Forward (U
V
W)
Built-in pull-down resistor (100 k
W
)
5 SEL_OUT I
Pin to select the synthesis method of turn-on signal and PWM signal
Low: Upper PWM
High: Upper/Lower alternate PWM
Built-in pull-down resistor (100 k
W
)
6 SEL_BIT0 I
7 SEL_BIT1 I
The number of counter bit (within the IC) select pin
The forced commutation frequency at the time of start is determined by the
resonator's frequency and the number of counter bit.
SEL_BIT0
=
High, SEL_BIT1
=
High: 16 bits
SEL_BIT0
=
Low, SEL_BIT1
=
High: 14 bits
SEL_BIT0
=
High, SEL_BIT1
=
Low: 12 bits
SEL_BIT0: Built-in pull-down resistor (100 k
W
),
SEL_BIT1: Built-in pull-up resistor (100 k
W
)
8 TEST I
Test pin
Built-in pull down resistor (10 k
W
)
Please connect this pin to GND in your application.
9 SEL_LAP I
Lap turn-on select pin
Low: Lap turn-on
High: 120 turn-on
Built-in pull-up resistor (100 k
W
)
10 XT
11 XTin
Resonator connecting pin
Selects starting commutation frequency.
Starting commutation frequency f
st
=
Resonator frequency f
xt
/(6
2
(BIT
+
3)
)
BIT: The number of counter bit which is decided by SEL_BIT0 and SEL_BIT1.
12 GND
Connected
to
ground.
TB9060FN
2002-09-11
4
Pin No.
Symbol
I/O
Description
13 V
DD
Connected to 5-V power supply.
14 OUT_FG O
Rotation signal output pin
Motor is stopped or starting: Low
Motor is in operation: The level is changed by electrical frequency of the motor.
15 OUT_UP O
U-phase upper turn-on signal output pin
U-phase winding wire positive ON/OFF switching pin
ON: Low, OFF: High
16 OUT_VP O
V-phase upper turn-on signal output pin
V-phase winding wire positive ON/OFF switching pin
ON: Low, OFF: High
17 OUT_WP O
W-phase upper turn-on signal output pin
W-phase winding wire positive ON/OFF switching pin
ON: Low, OFF: High
18 NC
Not
connected
19 OUT_UN O
U-phase lower turn-on signal output pin
U-phase winding wire negative ON/OFF switching pin
ON: High, OFF: Low
20 OUT_VN O
V-phase lower turn-on signal output pin
V-phase winding wire negative ON/OFF switching pin
ON: High, OFF: Low
21 OUT_WN O
W-phase lower turn-on signal output pin
W-phase winding wire negative ON/OFF switching pin
ON: High, OFF: Low
22 NC
Not
connected
23 OC I
Overcurrent signal input pin
High on this pin can put constraints on the turn-on signal which is performing
PWM control.
Built-in pull-up resistor (100 k
W
)
24 WAVE I
Position signal input pin
Applies majority logic synthesis signal of three-phase pin voltage.
Built-in pull-up resistor (100 k
W
)
TB9060FN
2002-09-11
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Functional Description
1. Sensorless
Drive
On receipt of PWM signal start instruction, turn-on signal for forced commutation (commutation
irrespective of the motor's rotor position) is driven onto pins 15 to 17 and pins 19 to 21, and the motor
starts to rotate. The motor's rotation causes induced voltage on winding wire pin for each phase.
When signals indicating positive or negative for pin voltage (including induced voltage) for each phase
are applied on respective position signal input pin, the turn-on signal for forced commutation is
automatically switched to turn-on signal for position signal (induced voltage).
Thereafter turn-on signal is formed according to the induced voltage contained in the pin voltage so as to
drive the brushless DC motor.
Sensorless drive timing charts (lead angles: 0, 7.5, 15 and 30) are shown below.
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