TB6537P/PG/F/FG
TOSHIBA CMOS Integrated Circuit Silicon Monolithic
TB6537P/PG,TB6537F/FG
3-PHASE FULL-WAVE SENSORLESS CONTROLLER FOR BRUSHLESS DC MOTORS
The TB6537P/PG/F/FG is a 3-phase full-wave sensorless
controller for brushless DC motors. It is capable of controlling
voltage through PWM signal input. When combined with various
drive circuits, it can be used for various types of motors.
TB6537P/PG
Features
•
•
•
•
•
•
•
•
3-phase full-wave sensorless drive
PWM control (PWM signal is supplied from external sources.)
Turn-on signal output current: 20 mA
Over-current protection function
Forward/reverse modes
Lead angle control function (0
°
, 7.5
°
, 15
°
and 30
°
)
Built-in lap turn-on function
Two types of PWM output (upper PWM and upper/lower
alternate PWM)
TB6537F/FG
Weight
DIP18-P-300-2.54D: 1.47 g (typ.)
SSOP24-P-300-1.00: 0.32 g (typ.)
TB6537PG/FG:
The TB6537PG/FG is a Pb-free product.
The following conditions apply to solderability:
*Solderability
1. Use of Sn-63Pb solder bath
*solder bath temperature = 230
°C
*dipping time = 5 seconds
*number of times = once
*use of R-type flux
2. Use of Sn-3.0Ag-0.5Cu solder bath
*solder bath temperature = 245
°C
*dipping time = 5 seconds
*number of times = once
*use of R-type flux
Company Headquarters
3 Northway Lane North
Latham,
New York
12110
Toll Free: 800.984.5337
Fax:
518.785.4725
Web: www.marktechopto.com | Email: info@marktechopto.com
California Sales Office:
950 South Coast Drive, Suite 265
Costa Mesa, California 92626
Toll Free: 800.984.5337
Fax: 714.850.9314
TB6537P/PG/F/FG
Block Diagram
V
DD
10/13
PWM
3/3
PWM Control
11/14 OUT_UP
SEL_OUT
5/6
13/17 OUT_VP
SEL_LAP
6/8
Rotation
Instruction
Circuit
Turn-on Signal
Forming Circuit
Timing
Control
15/21 OUT_WP
12/15 OUT_UN
CW_CCW
4/4
14/19 OUT_VN
16/22 OUT_WN
LA0
1/1
Lead Angle
Setting Circuit
2/2
Over-current
Protection
Circuit
LA1
17/23 OC
Clock
Generator
Circuit
Position
Detection
Circuit
18/24 WAVE
7/10
X
T
8/11
X
Tin
9/12
GND
TB6537P/PG/F/FG
TB6537P/TB6537F
2
2003-08-04
TB6537P/PG/F/FG
Pin Assignment
TB6537P/PG
LA0
LA1
PWM
CW_CCW
SEL_OUT
SEL_LAP
X
T
X
Tin
GND
1
2
3
4
5
6
7
8
9
18
17
16
15
14
13
12
11
10
WAVE
OC
OUT_WN
OUT_WP
OUT_VN
OUT_VP
OUT_UN
OUT_UP
V
DD
LA0
LA1
PWM
CW_CCW
NC
SEL_OUT
NC
SEL_LAP
NC
X
T
X
Tin
GND
TB6537F/FG
1
2
3
4
5
6
7
8
9
10
11
12
24
23
22
21
20
19
18
17
16
15
14
13
WAVE
OC
OUT_WN
OUT_WP
NC
OUT_VN
NC
OUT_VP
NC
OUT_UN
OUT_UP
V
DD
3
2003-08-04
TB6537P/PG/F/FG
Pin Description
Pin No.
TB6537P/PG TB6537F/FG
Lead angle setting signal input pin
1
1
LA0
I
•
•
•
2
2
LA1
I
•
•
•
3
3
PWM
I
•
•
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
Symbol
I/O
Description
PWM signal input pin
Inputs Low-active PWM signal
Built-in pull-up resistor
Disables input of duty-100% (Low) signal
High for 250 ns or longer is required.
High: Reverse (U
→
W
→
V)
Low, Open: Forward (U
→
V
→
W)
Built-in pull-down resistor
Rotation direction signal input pin
4
4
CW_CCW
I
•
•
•
⎯
5
NC
⎯
Not connected
Pin to select the synthesis method of the burn-in signal and PWM signal
5
6
SEL_OUT
I
•
•
•
Low: Upper PWM
High: Upper/Lower alternate PWM
Built-in pull-down resistor
⎯
7
NC
⎯
Not connected
Lap turn-on select pin
6
8
SEL_LAP
I
•
•
•
Low: Lap turn-on
High: 120° turn-on
Built-in pull-up resistor
⎯
7
8
9
10
9
10
11
12
13
NC
X
T
X
Tin
GND
V
DD
⎯
⎯
⎯
⎯
⎯
Not connected
Resonator connecting pin
•
Selects starting commutation frequency.
17
Starting commutation frequency f
st
=
Resonator frequency f
xt
/(6
×
2 )
Connected to GND.
Connected to 5-V power supply.
U-phase upper turn-on signal output pin
11
14
OUT_UP
O
•
•
•
•
U-phase winding wire positive ON/OFF switching pin
ON: Low, OFF: High
U-phase lower turn-on signal output pin
12
⎯
15
OUT_UN
O
⎯
U-phase winding wire negative ON/OFF switching pin
ON: High, OFF: Low
16
NC
Not connected
V-phase upper turn-on signal output pin
13
⎯
17
OUT_VP
O
⎯
•
•
V-phase winding wire positive ON/OFF switching pin
ON: Low, OFF: High
18
NC
Not connected
V-phase lower turn-on signal output pin
14
19
OUT_VN
O
•
•
V-phase winding wire negative ON/OFF switching pin
ON: High, OFF: Low
4
2003-08-04
TB6537P/PG/F/FG
Pin No.
TB6537P/PG TB6537F/FG
⎯
20
NC
⎯
Not connected
W-phase upper turn-on signal output pin
15
21
OUT_WP
O
•
•
•
•
•
•
•
•
W-phase winding wire positive ON/OFF switching pin
ON: Low, OFF: High
Symbol
I/O
Description
W-phase lower turn-on signal output pin
16
22
OUT_WN
O
W-phase winding wire negative ON/OFF switching pin
ON: High, OFF: Low
Over-current signal input pin
17
23
OC
I
High on this pin can put constraints on the turn-on signal that is
performing PWM control.
Built-in pull-up resistor
Positional signal input pin
18
24
WAVE
I
Inputs majority logic synthesis signal of three-phase pin voltage.
Built-in pull-up resistor
Functional Description
1. Sensorless Drive
On receipt of PWM signal start instruction turn-on signal for forcible commutation (commutation
irrespective of the rotor position of the motor) is output and the motor starts to rotate. The rotation of the
motor causes induced voltage on the winding wire pin for each phase.
When signals indicating positive or negative for pin voltage (including induced voltage) for each phase
are input on the respective positional signal input pins, the turn-on signal for forcible commutation is
automatically switched to the turn-on signal for the positional signal (induced voltage).
Thereafter the turn-on signal is formed according to the induced voltage contained in the pin voltage so
as to drive the brushless DC motor.
2. Starting commutation frequency
(resonator pin and counter bit select pin)
The forcible commutation frequency at the time of start is determined by the resonator frequency and the
number of counter bits (within the IC).
+
Starting commutation frequency f
st
=
Resonator frequency f
xt
/(6
×
2
(bit 3)
)
bit
=
14.
The forcible commutation frequency at the time of start can be adjusted using the inertia of the motor
and load.
•
The forcible commutation frequency should be set higher as the number of magnetic poles increases.
•
The forcible commutation frequency should be set lower as the inertia of the load increases.
3. PWM Control
The PWM signal can be reflected in the turn-on signal by supplying the PWM signal from external
sources.
The frequency of the PWM signal should be set sufficiently high with regard to the electrical frequency of
the motor and in accordance with the switching characteristics of the drive circuit.
As positional detection is performed in synchronization with the rising edges of PWM signal, positional
Duty (max)
250 ns
Duty (min)
250 ns
detection cannot be performed with 0% duty or 100% duty.
5
2003-08-04
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