la6502 Sanyo Semiconductor Corporation, la6502 Datasheet - Page 10

• Manufacturer Part Number: la6502
• Description: 5ch Driver For Cd And Dvd Spindle Driver 3-phase Linear Sensor-less Drive Btl 4ch
• Manufacturer: Sanyo Semiconductor Corporation

Continued from preceding page.
Pin No.
38
27
25
26
41
37
SPCX
SPFC
SPCTL
VREF
SPFGO
SPVCOIN
Pin name
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.
Frequency characteristics compensation
pin.
With a capacitor inserted between this pin
and GND, oscillation of the current control
system closed loop can be stopped.
Spindle speed control pin
Control is the constant current control by
applying current return from DRS.
Spindle speed control reference pin
BTLAMP internal VREF buffer input pin.
Spindle motor counter electromotive
voltage detection FG output pin (synthesis
of three phases)
Drum block VCO circuit voltage input pin
PCOUT pin voltage is filtered with CR for
input.
Function
LA6502
Pin voltage
1V to 3.3V
0V to 5V
26
25
37
300Ω
1kΩ
5V
Equivalent circuit
1kΩ
300Ω
38
300Ω
300Ω
5V
300Ω
Continued on next page.
5V
V CC 1
41
V CC
No.7816-10/11
300Ω
27
5V
5V
5V
300Ω