HA13563/V

7

K

T

: Torque constant (N•m/A)

T

L

: Rated load torque (N•m)

V

OSC

: PWM carrier oscillator amplitude (V

V

E

: Motor back EMF (V

R

NF

: Current detection resistor (

Ω)

Vref1 : Current limiter reference voltage (See the Electrical Charasteristics)

Vsat

: Saturation voltage (See the Electrical Charasteristics)

Set C2 and derive the integration constants from the following formulas.

R4 =

1

ω

(5)

R2 =

R4

(6)

C1 =

1

2

⋅ R2 ⋅ ω

O

(7)

R3 = R2

(8)

Next, determine R1 to match the phase of PLL output.

R1 =

1.89

⋅ R4

1.6

− 0.33 ⋅ R4 / R2

(9)

When log

ω

required. Use the following formula to set the phase advance:

1

C4

⋅ R5

ω

P

20

⋅ 2

<

(10)

DIS OUT

R1

R5

C4

PLL OUT

−

+

R2

C1

R3

2.8V

Integrating

amplifier

C2

R4

Figure 1

Integration Constants

2. The Hall output bias voltage is determined by R101 and R102.

3. The output current is controlled according to the following formula:

Iomax =

Vref1

Where, Vref1 is the current limiter reference voltage. (See the Electrical Charasteristics)

Mount this resistor as close as possible to the IC and use a resistor with a small inductance

component.

4. Connect these components as close to the IC as possible.