la6502 Sanyo Semiconductor Corporation, la6502 Datasheet - Page 5

• 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

Block Diagram
AMP1OUT
AMP2OUT
AMP1IN +
AMP2IN +
AMP4IN +
AMP1IN -
AMP2IN -
AMP4IN -
SPFGO
OUT1R
OUT2R
OUT4R
OUT1F
OUT2F
OUT4F
0.015μF
0.015μF
SPCTL
0.47μF
0.01μF
V CC
0.1μF
V REF
FC
SPC1
SPC2
SPVCOIN
SPCX
200Ω
200Ω
Startup control
(In certain applications, snubber may be added to the spindle motor coil output.)
circuit
+
--
PLL
560kΩ
--
+
--
+
--
+
--
+
--
+
--
+
VCO
Mask circuit
control circuit
FR
Timing
--
+
1 / 8
detection circuit
1 / 2(V CC 2 -- VF)
1 / 2(V CC 1 -- VF)
Rotor position
Soft switching
drive circuit
LA6502
- -
+
- -
+
MUTE
TSD
V REF
AMP3IN -
AMP3IN +
AMP3OUT
OUT3F
OUT3R
AMPIN -
AMPIN +
AMPOUT
V CC 1
SPRF
MCOM
UOUT
VOUT
WOUT
MGND
SGND
MUTE1
MUTE2
MUTE3
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