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TB6556FG Datasheet(PDF) 12 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) 12 Page - Toshiba Semiconductor

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TB6556FG
2012-10-22
12
5.
Correcting the lead angle
The lead angle can be corrected in the turn-on signal range from 0 to 58° in relation to the induced
voltage.
Analog input from LA pin (0 V to 5 V divided by 32):
0 V = 0°
5 V = 58° (when more than 5 V is input, 58°)
6.
Setting the carrier frequency
This function sets the triangular wave cycle (carrier cycle) necessary for generating the PWM signal.
(The triangular wave is used for forcibly turning on the lower transistor when the motor is driven by
square wave.)
Carrier cycle = fOSC/252 (Hz)
fOSC = reference clock (ceramic oscillation)
7.
Switching the output of the turn-on signal
This function switches the output of the turn-on signal between HIGH and LOW.
Pin OS:
HIGH = active HIGH
LOW = active LOW
8.
Outputting the reverse rotation detection signal
This function detects the motor rotation direction every electrical angle of 360°. (The output is HIGH
immediately after reset.)
When the signal of REV terminal is low, the operation transfers to 180° commutation mode. (Hall IN = 5
Hz or more)
CW/CCW Pin
Actual Motor Rotating Direction
REV Pin
CW (forward)
LOW
LOW (CW)
CCW (reverse)
HIGH
CW (forward)
HIGH
HIGH (CCW)
CCW (reverse)
LOW
9.
Protecting input pin
1.
Overcurrent protection (Pin Idc)
When the DC-link-voltage which is converted from DC-link-current exceeds the internal reference
voltage, performs gate block protection. Overcurrent protection is released for each carrier frequency.
Reference voltage = 0.5 V (typ.)
2.
Gate protection (Pin RES)
Output is turned off when the input signal is LOW, restarted when the input signal is HIGH.
The abnormality is detected externally and the signal input to pin RES.
RES Pin
OS Pin
Output Turn-on Signal
(U, V, W, X, Y, Z)
LOW
HIGH
LOW
HIGH
LOW
(When RES = LOW, bootstrap capacitor charging stops.)


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