BA6444 ROHM Electronics, BA6444 Datasheet - Page 10

• Manufacturer Part Number: BA6444
• Description: 3-phase Motor Driver
• Manufacturer: ROHM Electronics

FOperation notes
(1)
The BA6444FP has a thermal shutdown circuit to protect
the IC. The shutdown temperatures is 175_C (typical)
with a hysteresis width of 45_C (typical).
When the circuit is activated due to an increased in chip
temperature, the output pins (pins 5, 6 and 9) are set to
the open state. The circuit is functional against excessive
power dissipation, output short-circuiting, and other
irregularities in the output current, but does not work
against overheating caused by high internal currents due
to externally caused IC damage or pin-to-pin short-cir-
cuiting.
(2)
thresholds as shown in Fig. 16. Make sure that your ap-
plication will work properly when using the IC at low or
high temperatures.
(3)
FElectrical characteristic curves
Motor driver ICs
Thermal shut down circuit
The brake circuit has temperature-dependent
Be sure to connect the radiation fin to the ground.
(4)
The Hall input circuit is described in (6) of “I / O equivalent
circuits.” Hall devices can be connected in either series
or parallel. Be sure to keep the Hall input within the range
of 1.5V to (V
(5)
Note that unpredictable outputs may occur when the FG
amplifier input is outside the recommended range.
(6)
Pin 4, a torque amplifier ground pin, should be connected
to the ground. By connecting this pin to a point close to
the motor ground, you can prevent the effect of GND
common impedance on the current-sensing resistor
(0.5
and the motor ground pin.
Hall input
FG amplifier
ECGND pin (pin 4)
recommended) connected between R
CC
* 1.5V).
BA6444FP
NF
(pin 7)
643