tb6641fg TOSHIBA Semiconductor CORPORATION, tb6641fg Datasheet - Page 9

• Manufacturer Part Number: tb6641fg
• Description: Full-bridge Dc Motor Driver Ic
• Manufacturer: TOSHIBA Semiconductor CORPORATION

5.
Thermal Shutdown Circuit
The TB6641FG incorporates a thermal shutdown circuit. If the junction temperature (T
(typ.), all the outputs are turned off (Hi-Z).
Driving both the IN1 pin and IN2 pin Low allows a release of the shutdown operation; the TB6641FG
resumes the normal operation.
Note: The TSD circuit is activated if the absolute maximum junction temperature rating (T
TSD = 170°C (typ.)
TSD operation
Internal TSD signal
Note that the circuit is provided as an auxiliary only and does not necessarily provide the IC with a perfect
protection from any kind of damages.
Chip temperature
junction temperature (T
OUT1, OUT2
ALERT output
IN1, IN2
170°C (typ.)
H
H
H
H
L
L
L
L
j
)
(TSD)
Normal operation
9
TSD operation
OFF (Hi-Z)
Normal operation
More than 1 s (typ.)
j
) of 150°C is violated.
j
) exceeds 170°C
TB6641FG
2011-06-21