tb6551fag TOSHIBA Semiconductor CORPORATION, tb6551fag Datasheet - Page 15

• Manufacturer Part Number: tb6551fag
• Description: 3-phase Full-wave Sine-wave Pwm Brushless Motor Controller
• Manufacturer: TOSHIBA Semiconductor CORPORATION

Operating Waveform When Driven by Sine-Wave PWM
Generation inside of IC
Output waveform
Inter-line voltage
Note: The motor is driven by a sine wave if REV = Low, i.e., if the Hall signals at start-up are 5 Hz (f
When the motor is driven by a sine wave, the motor is accelerated or decelerated according to the On duty
of T
On duty on page 11):
Phase W
Phase U
Phase V
higher and the motor is rotating in the same direction as that of the TB6551FG/FAG setting.
(W-U)
(V-W)
ONU
V
(U-V)
V
V
VW
WU
UV
W
U
X
V
Y
Z
Triangular wave frequency = carrier frequency = f
when the amplitude of the modulation symbol changes by voltage V
Modulation signal
15
osc
/252 (Hz).
(CW/CCW = Low, OS = High)
Triangular wave (carrier frequency)
e
(see the diagram of output
TB6551FG/FAG
osc
2008-12-24
= 4 MHz) or