608

Motor driver ICs

BA6458FP-Y

∗ Note that resistance values of the I/O circuits can vary

± 30%

(2)

Torque control

(3)

Start / stop pin

The I / O equivalent circuit of the start / stop pin is shown

in (1). 1) of “Precautions for use.” The pin has a tempera-

ture dependence of

*7mV/_C, and the resistance can

vary

±30%. Take the temperature effect into consider-

ation when designing your application.

(4)

Hall input

The I / O equivalent circuit of the Hall input pins is shown

in (1). 5) of “Precautions for use.” The Hall devices can

be connected in either series or parallel.

(5)

Torque limit pin (pin 18)

The output current can be limited by applying a voltage

to the torque limit pin. Control is provided so that this pin

will have the same potential as the power ground pin.

voltage is 0.325V when the TL-pin voltage is 0.4V (typi-

Ω. Note that the volt-

(6)

Amplifiers 1 and 2

Unpredictable outputs may occur when the amplifier in-

put is outside the recommended range.

(7)

Hysteresis amplifier

X 1.2V) is recommended.

Unpredictable outputs may occur when the input is out-

side this range.

(8)

Thermal shutdown circuit (TSD)

The circuit puts the driver outputs (A1, A2, and A3) to the

open state at the temperature of 175

_C (typical). There

is a temperature difference of about 20

_C between the

temperatures at which the circuit is activated and deacti-

vated.