tb6551fag TOSHIBA Semiconductor CORPORATION, tb6551fag Datasheet - Page 10

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

Protecting input pin
Outputting reverse rotation detection signal
immediately after reset.)
1.
2.
3.
The direction of motor rotation is detected for every electrical angle of 360°. (The output is high
The REV terminal increases to a 180° turn-on mode at the time of low.
CW/CCW Pin
High (CCW)
Over-current protection (Pin I
Gate block protection (Pin RES)
Internal protection
Low (CW)
•
•
Over-current protection is released for each carrier frequency.
restarted.
Abnormalities are detected externally, and the signal is input to the pin RES.
When the DC-link-current exceeds the internal reference voltage, gate block protection is performed.
Reference voltage = 0.5 V (typ.)
When the input signal level is Low, the output is turned off; when the signal is High, the output is
(When RES = Low, bootstrap capacitor charging stops.)
Output at high impedance
Power supply
voltage
Turn-on signal
Positional signal abnormality protection
restarted.
Low power supply voltage protection (V
prevent damage caused by short-circuiting of power components when the power supply is turned
on or off.
When the positional signal is HHH or LLL, the output is turned off; otherwise, the output is
Outside the operating voltage range, the turn-on signal output is kept at high impedance to
RES Pin
Low
Actual Motor Rotating Direction
4.5 V (typ.)
CCW (reverse)
CCW (reverse)
OS Pin
CW (forward)
CW (forward)
High
Low
dc
)
Output Turn-on Signal
Output
(U, V, W, X, Y, Z)
10
CC
monitor)
High
Low
REV Pin
High
High
Low
Low
4.0 V (typ.)
Output at high impedance
V
GND
V
CC
M
TB6551FG/FAG
2008-12-24