TB6537FG Toshiba, TB6537FG Datasheet - Page 5

• Manufacturer Part Number: TB6537FG
• Description: CONTROLLER, MOT, 3PHASE, SMD, 6537
• Manufacturer: Toshiba

Specifications of TB6537FG

• No. Of Outputs: 6
• Output Current: 20mA
• Output Voltage: 5.5V
• Supply Voltage Range: 4.5V To 5.5V
• Driver Case Style: SSOP
• No. Of Pins: 24
• Operating Temperature Range: -30°C To +85°C
• Operating: RoHS Compliant
• Motor Type: Three Phase DC Brushless
• Rohs Compliant: Yes

Functional Description
1. Sensorless Drive
2. Starting commutation frequency
3. PWM Control
TB6537P/PG TB6537F/FG
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.
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).
as to drive the brushless DC motor.
number of counter bits (within the IC).
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.
sources.
the motor and in accordance with the switching characteristics of the drive circuit.
detection cannot be performed with 0% duty or 100% duty.
15
16
17
18
⎯
On receipt of PWM signal start instruction turn-on signal for forcible commutation (commutation
When signals indicating positive or negative for pin voltage (including induced voltage) for each phase
Thereafter the turn-on signal is formed according to the induced voltage contained in the pin voltage so
The forcible commutation frequency at the time of start is determined by the resonator frequency and the
The forcible commutation frequency at the time of start can be adjusted using the inertia of the motor
The PWM signal can be reflected in the turn-on signal by supplying the PWM signal from external
The frequency of the PWM signal should be set sufficiently high with regard to the electrical frequency of
As positional detection is performed in synchronization with the rising edges of PWM signal, positional
Starting commutation frequency f
Pin No.
20
21
22
23
24
Duty (min)
Duty (max)
OUT_WP
OUT_WN
Symbol
WAVE
NC
OC
I/O
⎯
O
O
I
I
st
= Resonator frequency f
Not connected
W-phase upper turn-on signal output pin
•
•
W-phase lower turn-on signal output pin
•
•
Over-current signal input pin
•
•
Positional signal input pin
•
•
(resonator pin and counter bit select pin)
W-phase winding wire positive ON/OFF switching pin
ON: Low, OFF: High
W-phase winding wire negative ON/OFF switching pin
ON: High, OFF: Low
High on this pin can put constraints on the turn-on signal that is
performing PWM control.
Built-in pull-up resistor
Inputs majority logic synthesis signal of three-phase pin voltage.
Built-in pull-up resistor
5
xt
/(6 × 2
250 ns
Description
250 ns
(bit + 3)
TB6537P/PG/F/FG
)
bit = 14.
2006-3-6