BA6858AFP datasheet(13/15 Pages) ROHM

13 / 15 page

860

d i

BA6858AFP / BA6858AFM / BA6859AFP /

Motor driver ICs

BA6859AFP-Y / BA6859AFM / BA6859AFS

FOperation notes

(1)

Torque command

When operating with ECR = 2.5V, the voltage range for the

torque command input is 0.5V to 3.3V, and therefore, the

characteristic will be unbalanced as shown in Fig.15.

Take due care.

(2)

Switches

The switches have a temperature characteristic of

approximately –5mV /

_C. Take care with regard to the

input voltage range.

(3)

Hall input

The input circuit shown in Fig.4 is used for the Hall inputs.

The Hall elements can be connected either in series or in parallel.

Set the Hall input voltage in the range 1.0V to 4.0V.

Set the resistance values between VH and VCC pins and the Hall elements after calculating the current to flow in Hall

elements.

If there will not be a resistor connected between the Hall elements and the VH pin, we recommend that IVH = 5mA or more.

(4)

Thermal shutdown (TSD)

When the junction temperature reaches 175

_C (Typ.), the A1, A2, and A3 coil outputs go open circuit.

The thermal shutdown has approximately 15

_C (Typ.) of hysteresis.

BA6858AFP Datasheet(PDF) 13 Page - Rohm