SANYO LA6503

Ordering number : EN5791
Monolithic Linear IC
LA6503
CD-ROM Drive Spindle Motor Driver + Sled Motor
Driver + Sled Motion/Position Detector IC
Overview
Package Dimensions
The LA6503 was developed for CAV control CD-ROM
drives, and provides spindle motor driver, sled motor
driver, and sled motion/position detection circuits.
unit: mm
3219-QFP34H-C
[LA6503]
Functions and Features
• CAV control spindle motor driver
— Three-phase brushless motor driver
— IOmax = 1 A
— Built-in FG output circuit (single Hall detection
output)
— Reverse braking circuit
— Built-in start/stop circuit
— Upper side current detection for minimal loss in the
current detection resistor. Also, the voltage drop in
this resistor reduces the IC internal power
dissipation.
— Built-in thermal shutdown circuit
• Sled motor driver
— One built-in BTL driver channel
— IOmax = 1 A
— Wide dynamic range
— Built-in level shifting circuit
— Muting (output on/off) circuit
— Built-in thermal shutdown circuit
• Sled motion/position detection circuit
— Circuit that provides a pulse output corresponding to
sled motion and position
— This circuit emits 96 pulses for each rotation from
a 24-pole magnet and 90° phase difference Hall
element motors, and thus detects the distance
moved. It also provides two 48-pulse outputs with
differing phases such that the motion direction can
be detected from the phase difference between those
signals.
• Hall bias power supply
— Generates the Hall element 3-V bias voltage.
— IOmax = 30 mA, typical
SANYO: QFP34H-C
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
31398HA (OT) No. 5791-1/8
LA6503
Specifications
Maximum Ratings at Ta = 25°C
Parameter
Symbol
Conditions
Ratings
Unit
Supply voltage
VCC max
7
Supply voltage
VM max
14
V
Input voltage
VC max
VCC
V
Output current
IO max
Spindle output, sled output
Allowable power dissipation
Pd max
Independent IC
V
1
A
0.77
W
Operating temperature
Topr
–20 to +75
°C
Storage temperature
Tstg
–55 to +150
°C
Ratings
Unit
Operating Conditions at Ta = 25°C
Parameter
Operating supply voltage range
Symbol
Conditions
VCC
4.6 to 6.0
V
VM
4.6 to 13.0
V
Operating Characteristics at Ta = 25°C, VCC = 5 V, VM = 12 V (unless otherwise specified)
Parameter
Symbol
Conditions
Ratings
min
typ
Unit
max
[Power Supply Current]
Current drain 1 (VCC)
ICC1
START/STOP = MUTE = 5 V
10
20
mA
Current drain 2 (VM)
IM1
START/STOP = MUTE = 5 V
25
50
mA
Quiescent current 1 (VCC)
ICC2
START/STOP = MUTE = 0 V
5
10
mA
Quiescent current 2 (VM)
IM2
START/STOP = MUTE = 0 V
1
5
mA
[Spindle Motor Block]
[Output]
Upper side saturation voltage 1
Vsource
IO = –0.5 A
1.0
1.5
V
Lower side saturation voltage 1
Vsink
IO = +0.5 A
0.33
0.80
V
Current limiter voltage setting
VCL
RRE = 0.43 Ω
0.32
V
[Hall Amplifier]
Common-mode input voltage range
VHCOM
1.2
Input bias current
VHIB
Minimum Hall input level
VHIN
60
High-level voltage
VS/SH
2.0
Low-level voltage
VS/SL
VCC – 1.0
1
V
µA
mVp-p
[S/S Pin]
Input current
IS/SI
VS/S = 5 V
Leakage current
IS/SL
VS/S = 0 V
VCC
V
0.7
V
200
–30
µA
µA
[Control]
IVC
VC = VCREF = 2.5 V
1
5
VCREF pin input current
VC pin input current
IVCREF
VC = VCREF = 2.5 V
1
5
Voltage gain
GVCO
∆VRF/∆VC
VCTH
VCREF = 2.5 V
2.35
2.65
V
∆VCTH
VCREF = 2.5 V
50
150
mV
10
mV
Rising edge threshold voltage
Rising edge threshold voltage difference
0.25
µA
µA
Times
[Hall Comparator]
Input offset voltage
Input hysteresis
VHCIOFFSET
VHCIHYS
Output on voltage
VOU
Output off voltage
VOD
Output current (sink)
Isink
8
mV
0.3
*
4.7
3
V
V
mA
Continued on next page.
No. 5791-2/8
LA6503
Continued from preceding page.
Parameter
Symbol
Ratings
Conditions
min
typ
Unit
max
[Sled Motor Block]
Output offset voltage
VOFF
–50
+50
Buffer input voltage range
VBIN
1.5
VCC – 1.5
Input voltage range
VIN
1.0
VCC – 1.5
Source output voltage
VO1
RL = 8 Ω
Sink output voltage
VO2
RL = 8 Ω
1.8
Closed-circuit voltage gain
VG
Bridge Amp
12
Slew rate
Voltage difference between outputs
9.5
SR
Muting on voltage
10.1
The amplifier output is on when at the high level.
0.7
1.2
3.0
V
V
V
2.4
V
dB
0.15
VMUTE
mV
V/µs
2.0
V
[Hall Bias (3-V Output Power Supply)]
Output voltage
VHB-OUT
IOUT = 30 mA
2.5
3.5
V
Line regulation
VHB-LIN
VCC = 4.6 to 6 V, IOUT = 30 mA
–50
+50
mV
–200
+200
mV
Load regulation
VHB-LOAD IOUT = 5 to 30 mA, VCC = 5 V
Note: For items marked with an asterisk (*), the Hall comparator goes to the high level when the S/S pin is off (standby mode).
Truth Table
(Spindle Motor Block)
Source → Sink
1
2
3
4
5
6
W→V
V→W
W→U
U→W
V→W
W→V
U→V
V→U
V→U
U→V
U→W
W→U
(Sled Motor Block)
Input
U
V
Control
W
H
H
L
H
L
L
L
L
H
L
H
L
H
L
L
H
H
H
VC
H
Input (VIN)
H
L
H
L
H
L
Mute
Output
SLD-OUT+
SLD-OUT–
H
H
L
L
—
—
H
L
H
L
—
—
Note: “—” indicates that the amplifier output is off.
L
H
L
H
L
H
L
Inputs: The “H” state is when the + input of the corresponding
phase is 0.2 V or more higher than the – input.
The “L” state is when the + input of the corresponding
phase is 0.2 V or more lower than the – input.
No. 5791-3/8
LA6503
Pin Assignment
No. 5791-4/8
LA6503
Pin Functions
Symbol
1
SLED OUT+
Sled motor noninverted output
2
SLED OUT–
Sled motor inverted output
3
P-GND
Power system ground
4
P-GND
Power system ground
5
SLED-IN
Sled motor signal input (The gain is set with a resistor.)
6
VCC (5 V)
Signal system power supply (5 V)
7
VREF
Reference voltage input
8
UIN–
Three-phase spindle motor hall signal input pin (U phase –)
9
UIN+
Three-phase spindle motor hall signal input pin (U phase +)
10
VIN–
Three-phase spindle motor hall signal input pin (V phase –)
11
VIN+
Three-phase spindle motor hall signal input pin (V phase +)
12
WIN–
Three-phase spindle motor hall signal input pin (W phase –)
13
WIN+
Three-phase spindle motor hall signal input pin (W phase +)
14
VHB (3Vreg)
15
HB–
Sled motion distance detection hall element input (HB –)
16
HB+
Sled motion distance detection hall element input (HB +)
17
HA–
Sled motion distance detection hall element input (HA –)
18
HA+
Sled motion distance detection hall element input (HA +)
19
S-GND
Signal system ground
20
P-GND
Power system ground
21
P-GND
Power system ground
22
MUTE
Sled motor output muting (output on/off control)
23
START/STOP
24
FC
Phase compensation capacitor connection
25
VC
Input for the spindle control signal from the ASP
26
WOUT
Three-phase spindle motor output (W phase output)
27
VOUT
Three-phase spindle motor output (V phase output)
28
UOUT
Three-phase spindle motor output (U phase output)
29
RF
Output current detection
30
FG
FG signal output
31
VM (12 V)
32
POUT
Sled motion position detection pulse output P (96 pulses)
33
ROUT
Sled motion position detection pulse output R (48 pulses)
34
QOUT
Sled motion position detection pulse output Q (48 pulses)
Allowable power dissipation, Pdmax – W
Pin No.
Function
Hall bias output pin (3-V power supply output)
Spindle motor output start/stop (output on/off control)
Motor power supply (12 V)
Mounted on the specified
printed circuit board
Independent IC
Ambient temperature, Ta – ˚C
No. 5791-5/8
LA6503
Matrix
Control circuit
Block Diagram
Reverse rotation
detection
Current limiter
Reverse
braking
Forward/
reverse
Hall bias
(3-V regulator)
Start/stop
(Spindle motor on/off)
Level
shifter
Thermal shutdown
circuit
Pulse generator circuit
Muting
(Sled motor on/off)
Pulse generator circuit
To each bias circuit
Power system ground
No. 5791-6/8
LA6503
Notes on Gain Adjustment (Sled Motor Block)
• Gain setting
The sled motor block gain is set using an external resistor as shown below.
Resistor R
(Input)
For example, when the external resistor R is 22 kΩ, the gain will be 0 dB when seen as an independent output amplifier
and 6 dB when seen as a BTL circuit (between outputs). Referenced to this 22-kΩ resistor, the independent output
amplifier gain will be 22k/R (as a multiple) or 20 log(22k/R) dB. Similarly, the BTL gain will be 2×22k/R
(as a multiple) or 20 log(22k/R) dB + 3 dB. The level shifting circuits used in current models perform both current and
voltage conversion, and thus have a different input type from normal operational amplifiers. The current that flows in
the external resistor, that is, the potential difference, becomes the input to AMP1 and AMP2.
• Output offset voltage
The output offset voltage is 1/2 VM (typical). The VO– and VO+ outputs are converted to outputs that are centered on
this voltage.
No. 5791-7/8
LA6503
Sled Position Detection Pulse Waveforms
Note: When the sled motor rotation direction changes (that is, when the HA and HB phase relationship changes), the R-OUT and Q-OUT phase relationship
changes and the direction can be detected from that phase. The motion distance and position are detected from P-OUT.
■ No products described or contained herein are intended for use in surgical implants, life-support systems, aerospace
equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of
which may directly or indirectly cause injury, death or property loss.
■ Anyone purchasing any products described or contained herein for an above-mentioned use shall:
➀ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and
distributors and all their officers and employees, jointly and severally, against any and all claims and litigation and all
damages, cost and expenses associated with such use:
➁ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on
SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors or any of their officers and employees
jointly or severally.
■ Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guaranteed for
volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied
regarding its use or any infringements of intellectual property rights or other rights of third parties.
This catalog provides information as of March, 1998. Specifications and information herein are subject to
change without notice.
PS No. 5791-8/8