LA6502
Continued from preceding page.
Pin No.
36
Pin name
AMPIN+
Function
OP-AMP non-inverted input pin.
Pin voltage
0V to 5V
Equivalent circuit
300Ω
36
300Ω
35
AMPIN-
OP-AMP inverted input pin.
35
34
AMPOUT
OP-AMP output pin.
5V
VCC1
34
19
18
17
21
SPUOUT
SPVOUT
SPWOUT
SPRF
Spindle motor driver output pin.
VCC1
21
Spindle motor driver output transistor
power pin
Detects this voltage for constant current
control
/The current limiter also detects this
potential and is activated.
17
18
19
24
MCOM
Spindle motor coil mid-point input pin
Detects the coil voltage waveform with
reference to this voltage.
VCC1
10kΩ
10kΩ
17 18 19
17 18 19
2kΩ
24
200Ω
200Ω
200Ω
39
SPC1
Spindle triangular wave generating
capacitor connection pin
With this triangular wave, the coil output
waveform is soft switched.
39
40
VCC1
5V
40
SPC2
1kΩ
1 / 2 VCC-- VF
Continued on next page.
No.7816-9/11
SANYO [ SANYO SEMICON DEVICE ]
