LA6502 データシートの表示（PDF） - SANYO -> Panasonic

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LA6502

5ch driver for CD and DVD Spindle driver : 3-phase linear sensor-less drive BTL 4ch

SANYO -> Panasonic 

LA6502

Continued from preceding page.

Pin No. Pin name

Function

38

SPCX

With the value of a capacitor connected

between this pin and GND in the spindle

VCO circuit, the operation frequency

range and minimum operation frequency

are determined.

Pin voltage

27

SPFC

Frequency characteristics compensation

pin.

With a capacitor inserted between this pin

and GND, oscillation of the current control

system closed loop can be stopped.

Equivalent circuit

5V

300Ω

38

5V

1kΩ

VCC

27

25

SPCTL

Spindle speed control pin

Control is the constant current control by

applying current return from DRS.

0V to 5V

25

300Ω

5V

300Ω

26

VREF

Spindle speed control reference pin

BTLAMP internal VREF buffer input pin.

1V to 3.3V

26

300Ω

5V

300Ω 300Ω

300Ω

41

SPFGO

Spindle motor counter electromotive

voltage detection FG output pin (synthesis

of three phases)

37

SPVCOIN Drum block VCO circuit voltage input pin

PCOUT pin voltage is filtered with CR for

input.

5V

VCC1

41

5V

1kΩ

37

Continued on next page.

No.7816-10/11

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