PANASONIC AN8472SA

ICs for Compact Disc/CD-ROM Player
AN8472SA
Spindle motor driver IC for optical disk
■ Overview
Unit: mm
32
17
1
16
8.1±0.3
11.0±0.3
6.1±0.3
The AN8472SA is a high performance IC suited
for driving a spindle motor of an optical disk such
as CD-ROM, DVD etc. Small outline package can
be used due to reduced power consumption by adopting the direct PWM drive system.
0.65
+0.10
0.3 –0.05
Seating plane
+0.10
1.5±0.2
0.2–0.05
0.1±0.1
(0.625)
0.65±0.10
• 3-phase full-wave 120° duty factor system
• Low power consumption due to a direct PWM
system
• D-MOS transistor with low ON resistance (0.6 Ω
typ.) on the output stage
• With start and stop pins
• Thermal shut-down function built-in
• With FG output pin
• Reverse breaking by EC/ECR voltage
• With Hall bias pin
• Surface-mount small package
0.65±0.10
■ Features
(0.5)
SSOP032-P-0300
■ Applications
• Optical disk drive of CD-ROM, DVD-ROM, CD-R, CD-RW etc.
1
ICs for Compact Disc/CD-ROM Player
VM1
VPUMP
12
BC1
13
BC2
14
BC3
15
BC4
16
18
VDD
■ Block Diagram
31
AN8472SA
Step-up voltage circuit
Start 11
Start/stop
Thermal
protection
OSC
19 VM2
FG 10
27 A11
H1H 7
28 A12
H1L 6
H2H 5
H2L 4
Hall amp.
matrix
21 A31
Amp.
22 A32
H3L 2
PWMOUT
23 RNF2
Hall
bias
EC 8
FF
SRESET
RNFOUT
VT
26 RNF1
×5
17 GND
ECR 9
FC 32
24 A21
25 A22
Distributor
circuit
H3H 3
VH 1
Output
circuit
Amp.
Oscillator
VC1
SSET
■ Pin Descriptions
2
Pin No.
Symbol
1
VH
2
Description
Pin No.
Symbol
Description
Hall bias pin
13
BC1
Booster capacitor connection pin 1
H3L
Hall element-3 negative input pin
14
BC2
Booster capacitor connection pin 2
3
H3H
Hall element-3 positive input pin
15
BC3
Booster capacitor connection pin 3
4
H2L
Hall element-2 negative input pin
16
BC4
Booster capacitor connection pin 4
5
H2H
Hall element-2 positive input pin
17
GND
Ground pin
6
H1L
Hall element-1 negative input pin
18
VDD
Supply voltage pin
7
H1H
Hall element-1 positive input pin
19
VM2
Motor supply voltage pin 2
8
EC
Torque command input pin
20
N.C.
N.C.
9
ECR
Torque command reference input pin
21
A31
Drive output 3
10
FG
FG signal output pin
22
A32
Drive output 3
11
Start
Start/stop changeover pin
23
RNF2
12
VPUMP
Booster pin
24
A21
Current det. pin 2
Drive output 2
ICs for Compact Disc/CD-ROM Player
AN8472SA
■ Pin Descriptions (continued)
Pin No.
Symbol
25
A22
26
RNF1
27
28
Description
Pin No.
Symbol
Description
Drive output 2
29
N.C.
N.C.
Current det. pin 1
30
N.C.
N.C.
A11
Drive output 1
31
VM1
Motor supply voltage pin 1
A12
Drive output 1
32
FC
Oscillator pin
■ Absolute Maximum Ratings
Parameter
Supply voltage
*2
Symbol
Rating
Unit
VDD
6
V
V(m)
15
V
V(n)
0 to VDD
V
IDD
30
mA
I(o)
±1 200
mA
IHB(n)
30
mA
PD
293
mW
Topr
−20 to +70
°C
Tstg
−55 to +150
°C
VM1
VM2
Drive output voltage
*5
Control signal input voltage
*6
Supply current
Drive output current
Hall bias current
*4
*7
Power dissipation
*3
Operating ambient temperature
Storage temperature
*1
*1
Note) Do not apply external currents or voltages to any pins not specifically mentioned.
For circuit currents, '+' denotes current flowing into the IC, and '−' denotes current flowing out of the IC.
*1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
*2: The voltage in the step-up voltage circuit exceeds the supply voltage.
For the allowable value of the step-up voltage, refer to "■ Electrical Characteristics".
*3: The power dissipation shown is the value of independent IC without a heat sink at Ta = 70°C. Refer to the PD  Ta curves
of the "■ Application Notes" for details.
*4: o = 19, 21, 22, 23, 24, 25, 26, 27, 28, 31
*5: m = 21, 22, 24, 25, 27, 28
*6: n = 8, 9, 11
*7: n = 1, 2, 3, 4, 5, 6, 7
■ Recommended Operating Range
Parameter
Supply voltage
Symbol
Range
Unit
VDD
4.5 to 5.5
V
VM1
VM2
3
AN8472SA
ICs for Compact Disc/CD-ROM Player
■ Electrical Characteristics at Ta = 25°C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Overall
Circuit current 1
IDD1
VDD = 5 V in power save mode

0
0.1
mA
Circuit current 2
IDD2
VDD = 5 V

9
14
mA
Start/stop
Start voltage
VSTART
Voltage with which a circuit operates
at VDD = 5 V and L → H
2.7


V
Stop voltage
VSTOP
Voltage with which a circuit becomes
off at VDD = 5 V and H → L


0.7
V
VHB
VDD = 5 V, IHB = 20 mA
0.7
1.3
1.6
V
IBH
VDD = 5 V

1
5
µA
Hall bias
Hall bias voltage
Hall amplifier
Input bias current
In-phase input voltage range
VHBR
VDD = 5 V, except for H2H, H2L
1.5

4.0
V
Minimum input level
VINH
VDD = 5 V
60


mV[p-p]
EC
VDD = 5 V
0.5

3.9
V
Offset voltage
ECOF
VDD = 5 V
−100
0
100
mV
Dead zone
ECDZ
VDD = 5 V
0
75
150
mV
Input current
ECIN
VDD = 5 V, EC = ECR = 2.5 V
−5
−1

µA
Input/output gain
ACS
VDD = 5 V, RCS = 0.33 Ω
0.36
0.48
0.60
A/V
High-level output saturation voltage
VOH
VDD = 5 V, IO = −500 mA

0.15
0.30
V
Low-level output saturation voltage
VOL
VDD = 5 V, IO = 500 mA

0.15
0.30
V
Torque limit current
ITL
VDD = 5 V, RCS = 0.33 Ω
455
570
685
mA
Charging current
ICH
VDD = 5 V
−65
−50
−35
µA
Upper threshold voltage
VCH
VDD = 5 V
1.75
2.50
3.25
V
Lower threshold voltage
VCL
VDD = 5 V
0.35
0.50
0.65
V
FG output high-level
FGH
VDD = 5 V, IFG = − 0.01 mA
3


V
FG output low-level
FGL
VDD = 5 V, IFG = 0.01 mA


0.5
V
In-phase input voltage range
VFGR
VDD = 5 V
1.5

3.0
V
FG hysteresis width
HFG
VDD = 5 V
5
10
20
mV
9.5

15
V
Torque command
In-phase input voltage range
Output
OSC
FG
Step-up circuit
Step-up voltage
4
VPUMP
VDD = 5 V, VM1 = VM2 = 5 V
ICs for Compact Disc/CD-ROM Player
AN8472SA
■ Electrical Characteristics at Ta = 25°C (continued)
• Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Thermal protection
Thermal protection operating
temperature
TSDON
VDD = 5 V

155

°C
Thermal protection hysteresis width
∆TSD
VDD = 5 V

45

°C
■ Terminal Equivalent Circuits
Pin No.
Symbol
1
VH
2
H3L
3
H3H
4
H2L
Equivalent circuit
1
Pin 3, 7
2 kΩ
(typ.)
Pin 2, 6
2 kΩ
(typ.)
5
5
H2
6
H1L
7
H1H
8
EC
9
ECR
4
2 kΩ
(typ.)
2 kΩ
(typ.)
Refer to pin 2
VDD
8
9
1 kΩ
(typ.)
1 kΩ
(typ.)
5
AN8472SA
ICs for Compact Disc/CD-ROM Player
■ Terminal Equivalent Circuits (continued)
Pin No.
Symbol
10
FG
Equivalent circuit
VDD
50 kΩ
(typ.)
10
11
Start
11
41 kΩ
(typ.)
41 kΩ
(typ.)
12
VPUMP
13
BC1
14
BC2
15
BC3
16
BC4
17
GND
Ground pin
18
VDD
Supply voltage pin
19
VM2
VM1
BC4 BC3 VPUMP
16 15
12
BC1 BC2
13 14
19
31
VM1
21
24
27
22
25
28 A12
Pin 23, 26
RNF1, RNF2
6
20
N.C.
N.C.
21
A31
Refer to pin 19
22
A32
23
RNF2
24
A21
25
A22
26
RNF1
27
A11
28
A12
ICs for Compact Disc/CD-ROM Player
AN8472SA
■ Terminal Equivalent Circuits (continued)
Pin No.
Symbol
Equivalent circuit
29
N.C.
N.C.
30
N.C.
N.C.
31
VM1
Refer to pin 19
32
FC
VDD
1 kΩ
(typ.)
32
1 kΩ
(typ.)
■ Usage Notes
• Prevent this IC from being line-to-ground fault.
(To be concrete, do not short-circuit any of A31 (pin 21), A32 (pin 22), A21 (pin 24), A22 (pin 25), A11 (pin 27) and
A12 (pin 28) with GND pin (pin 17).)
• Precaution must be taken on the pin 13 and pin 16 due to approximately 200 V of the static breakdown voltages.
(C = 200 pF, R = 0 Ω)
■ Application Notes
• PD  Ta curves of SSOP032-P-0300
PD  T a
1.400
1.289
1.200
Power dissipation PD (W)
Mounted on standard board
(glass epoxy: 50 × 50 × t0.8 mm3)
Rth(j-a) = 96.9°C/ W
1.000
0.800
0.668
0.600
0.400
Independent IC
without a heat sink
Rth(j-a) = 187.1°C/ W
0.200
0.000
0
25
50
75
100
125
150
Ambient temperature Ta (°C)
7
AN8472SA
ICs for Compact Disc/CD-ROM Player
■ Application Notes (continued)
• Phase conditions between Hall input and output current
Phase of Hall pin
H1H
H2H
H3H
A
H
ML
ML
B
C
MH
ML
L
ML
MH
H
D
L
MH
MH
E
ML
H
ML
F
MH
MH
L
H1
H3
H2
H1
H2
H3
0
ECR
EC
0
Emit
Output current
A1
0
Sink
Emit
Output current
A2
0
Sink
Emit
Output current
0
A3
Sink
A
8
B
C
D
E
F
ICs for Compact Disc/CD-ROM Player
AN8472SA
0.1 µF
12 VPUMP
VM1
5V
31
13 BC1
14 BC2
0.1 µF
0.1 µF
15 BC3
16 BC4
18 VDD
(Connect this capacitor,
if necessary,
after checking operation.)
VDD = 5 V
■ Application Circuit Example
Step-up voltage circuit
START 11
100 Ω
Start/stop
OSC
Thermal
protection
19 VM2
2 200 pF 10
FG
27 A11
H1H 7
28 A12
H1L 6
Output
circuit
Amp.
H2H 5
H2L 4
Hall amp.
matrix
24 A21
25 A22
Distributor
circuit
21 A31
Amp.
H3H 3
22 A32
H3L 2
PWMOUT
23 RNF2
VH 1
100Ω
Spindle speed
control signal
EC 8
FF
26 RNF1
SRESET
RNFOUT
VT
×5
17 GND
RCS = 0.33 Ω
ECR 9
FC 32
560 pF
Hall
bias
Oscillator
SSET
VC1
9