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TB6556FG Datasheet(PDF) 18 Page - Toshiba Semiconductor

Part No. TB6556FG
Description  3-Phase Full-Wave Sine-Wave PWM Brushless Motor Controller
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Maker  TOSHIBA [Toshiba Semiconductor]
Homepage  http://www.semicon.toshiba.co.jp/eng
Logo TOSHIBA - Toshiba Semiconductor

TB6556FG Datasheet(HTML) 18 Page - Toshiba Semiconductor

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TB6556FG
2012-10-22
18
Operating Waveform When Driven by Sine-Wave PWM (CW/CCW = LOW, OS = HIGH,
SS = High)
When driven by a sine wave, the motor is accelerated or decelerated according to the ON duty of TONU as
the amplitude of the modulation symbol changes according to voltage Ve. (See the diagram of the
modulation ratio on page 14.)
Triangular wave frequency = carrier frequency = fOSC/252 (Hz)
Note: At startup, the motor is driven by a sine wave when the Hall signals are 5 Hz or higher (fOSC = 4 MHz) and the
motor is rotating in the same direction as the TB6556FG controlling it (REV = LOW).
Generation inside of IC
Phase V
Phase U
Phase W
Modulation signal
Triangular wave (carrier frequency)
VUV
(U-V)
VVW
(V-W)
VWU
(W-U)
Inter-line voltage
Output waveform
U
X
V
Y
W
Z


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