TOSHIBA TB6537P, TB6537F Technical data
查询TB6537供应商
TOSHIBA CMOS Integrated Circuit Silicon Monolithic
TB6537P,TB6537F
3-Phase Full-Wave Sensorless Controller for Brushless DC Motors
TB6537P/F 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 supplied from external sources.)
· Turn-on signal output current: 20 mA
· Overcurrent protection function
· Forward/reverse modes
· Lead angle control function (0, 7.5, 15 and 30 degrees)
· Built-in lap turn-on function
· Two types of PWM output (upper PWM and upper/lower
alternate PWM)
TB6537P
TB6537F
TB6537P/F
Weight
DIP18-P-300-2.54D: 1.47 g (typ.)
SSOP24-P-300-1.00: 0.32 g (typ.)
1
2003-02-20
Block Diagram
V
DD
10/13
TB6537P/F
PWM
SEL_OUT
SEL_LAP
CW_CCW
LA0
LA1
3/3
5/6
6/8
4/4
1/1
2/2
PWM Control
Rotation
Instruction
Circuit
Lead Angle
Setting Circuit
Clock
Generator
Circuit
Timing
Control
Turn-on Signal
Forming Circuit
Overcurrent
Protection
Circuit
Position
Detection
Circuit
11/14
13/17
15/21
12/15
14/19
16/22
17/23
18/24
OUT_UP
OUT_VP
OUT_WP
OUT_UN
OUT_VN
OUT_WN
OC
WAVE
7/10 8/11 9/12
Tin
XT
GND X
TB6537P/TB6537F
2
2003-02-20
Pin Assignment
TB6537P
TB6537P/F
TB6537F
LA0
LA1
PWM
CW_CCW
SEL_OUT
SEL_LAP
X
X
Tin
GND
1
2
3
4
5
6
7
T
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
X
Tin
GND
1
2
3
4
5
6
7
8
9
10
T
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
2003-02-20
Pin Description
TB6537P/F
Pin No.
TB6537P TB6537F
1 1 LA0 I
2 2 LA1 I
3 3 PWM I
4 4 CW_CCW I
¾ 5 NC ¾ Not connected
5 6 SEL_OUT I
¾ 7 NC ¾ Not connected
6 8 SEL_LAP I
¾ 9 NC ¾ Not connected
7 10 X
8 11 X
9 12 GND ¾ Connected to GND.
10 13 V
11 14 OUT_UP O
12 15 OUT_UN O
¾ 16 NC ¾ Not connected
13 17 OUT_VP O
¾ 18 NC ¾ Not connected
14 19 OUT_VN O
Symbol I/O Description
Lead angle setting signal input pin
· LA0 = Low, LA1 = Low: Lead angle 0 degree
· LA0 = High, LA1 = Low: Lead angle 7.5 degree
· LA0 = Low, LA1 = High: Lead angle 15 degree
· LA0 = High, LA1 = High: Lead angle 30 degree
· B ui l t-in pull-down resistor
PWM signal input pin
· I nputs Low-acti ve PW M signal
· B ui l t-in pull-up resistor
· Disables input of duty-100% (Low) signal
High for 250 ns or longer is required.
Rotation direction signal input pin
· High: Reverse (U ® W ® V)
· Low, Open: Forward (U ® V ® W)
· B ui l t-in pull-down resistor
Pin to select the synthesis method of burn-in signal and PWM signal
· Low: Upper
· High: Upper/Lower alternate PWM
· B ui l t-in pull-down resistor
Lap turn-on select pin
· Low: Lap turn-on
· High: 120 degrees turn-on
· B ui l t-in pull-up resistor
¾
T
Tin
DD
Resonator connecting pin
· S el ects starting commutation frequency.
¾
¾ Connected to 5-V power supply.
Starting commutation frequency f
U-phase upper turn-on signal output pin
· U-phas e winding wire posit i ve ON/OFF switching pin
· ON: Low, OFF: High
U-phase lower turn-on signal output pin
· U-phas e winding wire negative ON/OFF switc hi ng pin
· ON: Hi gh, OFF: Low
V-phase upper turn-on signal output pin
· V-phase winding wire positive ON/OFF switching pin
· ON: Low, OFF: High
V-phase lower turn-on signal output pin
· V-phase winding wire negative ON/OFF switching pin
· ON: Hi gh, OFF: Low
PWM
= Resonator frequency fxt/(6 ´ 217)
st
4
2003-02-20
TB6537P/F
Pin No.
TB6537P TB6537F
¾ 20 NC ¾ Not connected
15 21 OUT_WP O
16 22 OUT_WN O
17 23 OC I
18 24 WAVE I
Symbol I/O Description
W-phase upper turn-on signal output pin
· W-phase winding wire positive ON/OFF switching
· ON: Low, OFF: High
W-phase lower turn-on signal output pin
· W-phase winding wire negative ON/OFF switching pin
· ON: Hi gh, OFF: Low
Overcurrent signal input pin
· High on this pin can put constraints on the turn-on signal which is performing PWM
· B ui l t-in pull-up resistor
Positional signal input pin
· Inputs majority logic synthesis signal of three-phase pin voltage.
· B ui l t-in pull-up resistor
Functional Description
1. Sensorless Drive
On receipt of PWM signal start instruction turn-in signal for forcible commutation (commutation
irrespective of the motor’s rotor position) is output 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 input on respective positional signal input pin, the turn-on signal for forcible commutation is
automatically switched to turn-on signal for positional 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.
2. Starting commutation frequency
The forcible commutation frequency at the time of start is determined by the resonator’s frequency and
the number of counter bit (within the IC).
Starting commutation frequency f
The forcible commutation frequency at the time of start can be adjusted using 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
PWM signal can be reflected in turn-on signal by supplying PWM signal from external sources.
The frequency of the PWM signal shoud be set adequately high with regard to the electrical frequency of
the motor and in accordance to the switching characteristics of the drive circuit.
Because positional detection is performed in synchronization with the rising edges of PWM signal,
positional detection cannot be performed with 0% duty or 100% duty.
control.
(resonator pin and counter bit select pin)
= Resonator frequency fxt/(6 ´ 2
st
(bit + 3)
pin
) bit = 14
Duty (max)
250 ns
Duty (min)
250 ns
The voltage applied to the motor is duty 100% because of the storage time of the drive circuit even if the
duty is 99%.
5
2003-02-20
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