TB6556F TOSHIBA [Toshiba Semiconductor], TB6556F Datasheet - Page 12

• Manufacturer Part Number: TB6556F
• Description: 3-Phase Full-Wave Sine-Wave PWM Brushless Motor Controller
• Manufacturer: TOSHIBA [Toshiba Semiconductor]

5. Correcting the lead angle
6. Setting the carrier frequency
7. Switching the output of the turn-on signal
8. Outputting the reverse rotation detection signal
9. Protecting input pin
voltage.
square wave.)
immediately after reset.)
1.
2.
The lead angle can be corrected in the turn-on signal range from 0 to 58° in relation to the induced
Analog input from LA pin (0 V to 5 V divided by 32):
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
This function switches the output of the turn-on signal between HIGH and LOW.
Pin OS:
This function detects the motor rotation direction every electrical angle of 360°. (The output is HIGH
The REV terminal increases with a 180° turn-on mode during LOW.
CW/CCW Pin
HIGH (CCW)
0 V = 0°
5 V = 58° (when more than 5 V is input, 58°)
Carrier cycle = f
HIGH = active HIGH
LOW = active LOW
LOW (CW)
Overcurrent protection (Pin I
Gate protection (Pin RES)
Overcurrent protection is released for each carrier frequency.
The abnormality is detected externally and the signal input to pin RES.
When the DC-link-current exceeds the internal reference voltage, performs gate block protection.
Reference voltage = 0.5 V (typ.)
Output is turned off when the input signal is LOW, restarted when the input signal is HIGH.
(When RES = LOW, bootstrap capacitor charging stops.)
RES Pin
LOW
osc
Actual Motor Rotating Direction
/252 (Hz)
CCW (reverse)
CCW (reverse)
OS Pin
CW (forward)
CW (forward)
HIGH
LOW
dc
f
)
osc
= reference clock (crystal oscillation)
Output Turn-on Signal
(U, V, W, X, Y, Z)
12
HIGH
LOW
REV Pin
HIGH
HIGH
LOW
LOW
TB6556F/FG
2005-01-19