ICs for Optical Disk Drive
AN8737SB
3-channel driver IC for optical disk drive
s
Overview
The AN8737SB is a BTL type 3-channel driver
IC, adopting a current feedback system for 2 chan-
nels, which makes it optimum for an actuator and a
motor driver of CD-ROM/DVD-ROM. It can also
constitute an optimum system in combination with
the AN8488SB, a spindle plus loading driver IC. A
surface mount-type package of good heat radiation
characteristic is used.
18.4±0.2
(5.15)
(4.8)
28
22
21
15
(1.315)
8.3±0.2
10.93±0.30
Unit: mm
0.30
–0.05
+0.10
0° to 10°
1
7
8
14
0.65±0.20
2.7±0.2
s
Features
•
Little phase delay due to a current feedback system
(2 channels for actuator)
•
The remaining channel is available for either
traverse or loading motor drive.
•
Wide output dynamic range (4 V/I
O
=
800 mA)
•
Standby function built in (all channels can be
muted.)
•
Thermal shut-down circuit built in
•
With thermal flag pin
(1.2)
0.8
(6.4)
0.35
+0.10
–0.05
Seating plane
HSOP042-P-0400
s
Applications
•
CD/CD-ROM player
•
DVD/DVD-ROM drive
0.1±0.1
1
AN8737SB
s
Block Diagram
PV
CC1
ICs for Optical Disk Drive
20 TFLG
16 VO3−
12
15
28
14
19
1
2 V
CC
PGND1
13
V
CC
det.
Temp.
det.
1
2 V
CC
17
PGND2
Reset
18
V
REF
reset
PC2
V
REF
26
N.C.
10
VRB1
IN1
OUT1
OUT2
IN2
IN3N
s
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Description
Ch. 2 first stage feedback pin
Ch. 2 first stage input pin
Ch. 1 first stage input pin
Ch. 1 first stage feedback pin
Ch. 1 current feedback input pin
Ch. 1 current feedback output pin
Control side power supply pin
Ch. 1 & ch. 2 power side power supply pin
Ch. 1 reverse direction output pin
N.C.
Ch. 1 & Ch. 2 mute pin
Ch. 2 forward direction output pin
Ch. 1 & ch. 2 power side grounding pin
Ch. 2 reverse direction output pin
Ch. 2 forward direction output pin
Pin No.
16
17
18
19
20
21
22
23
24
25
26
27
28
Fin
Description
Ch. 3 reverse direction output pin
Ch. 3 power side grounding pin
Ch. 3 mute pin
Ch. 3 forward direction output pin
TDS flag pin
Ch. 3 power side power supply pin
N.C.
Ch. 3 reverse rotation input pin
Standby input pin
Ch. 3 forward rotation input pin
Reference voltage input pin
Ch. 2 current feedback output pin
Ch. 2 current feedback input pin
Control side grounding pin
2
SGND
VFB2
PC1
SB
IN3P
Fin
27
11
24
23
25
6
3
4
1
2
21
8
9
5
7
PV
CC2
VO1−
VO1+
VO2+
VO2−
VO3+
SV
CC
VS1
VS2
ICs for Optical Disk Drive
s
Absolute Maximum Ratings
Parameter
Supply voltage
Supply voltage range
Supply current
*2
Symbol
V
CC
SV
CC
, PV
CC1
, PV
CC2
I
SVCC
I
PVCC1
I
PVCC2
Power dissipation
*3
Operating ambient temperature
*1
Storage temperature
*1
P
D
T
opr
T
stg
Rating
14.0
−
0.3 to
+14.0
500
2.0
800
542
−30
to
+85
−55
to
+150
AN8737SB
Unit
V
V
mA
A
mA
mW
°C
°C
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for T
a
=
25°C.
*2: I
PVCC1
be 1 A or less for channel 1 and channel 2, respectively.
*3: Use within the range of P
D
=
542 mW or less at T
a
=
85°C, following the allowable power dissipation characteristic curve
of "s Application Notes".
s
Recommended Operating Range
Parameter
Supply voltage
Symbol
SV
CC
PV
CC1
, PV
CC2
Range
4.5 to 13.5
3.5 to 13.5
Unit
V
s
Electrical Characteristics at SV
CC
=
12 V, PV
CC1
=
5 V, PV
CC2
=
5 V, R
L
=
8
Ω,
V
REF
=
1.65 V,
V
SB
=
V
PC1
=
V
PC2
=
3.3 V, V
IN1
=
V
IN2
=
V
IN3
=
1.65 V, T
a
=
25°C
Parameter
Current consumption 1
(no signal)
Current consumption 2
(no signal)
Current consumption 1
(standby)
Current consumption 2
(standby)
Driver 1, Driver 2
Output offset voltage
Gain (+)
Relative gain (+/−)
Maximum output amplitude (+)
Maximum output amplitude (−)
Symbol
I
SVO
I
PVO
I
SVSB
I
PVSB
Conditions
V
IN1
=
V
IN2
=
V
REF
, V
IN3P
=
2.5 V
V
SB
=
V
PC1
=
V
PC2
=
3.3 V
V
IN1
=
V
IN2
=
V
REF
, V
IN3P
=
2.5 V
V
SB
=
V
PC1
=
V
PC2
=
3.3 V
V
IN1
=
V
IN2
=
V
REF
, V
IN3P
=
2.5 V
V
SB
=
V
PC1
=
V
PC2
=
0 V
V
IN1
=
V
IN2
=
V
REF
, V
IN3P
=
2.5 V
V
SB
=
V
PC1
=
V
PC2
=
0 V
V
IN
=
V
REF
V
IN
=
V
REF
±50
mV
V
IN
=
3.3 V, R
L1
, R
L2
=
4
Ω
R
S1
, R
S2
=
0.5
Ω
V
IN
=
0 V, R
L1
, R
L2
=
4
Ω
R
S1
, R
S2
=
0.5
Ω
Min
Typ
25
25
0.6
0.2
Max
45
45
1.5
1.0
Unit
mA
mA
mA
mA
R
L1
, R
L2
=
4
Ω,
R
S1
, R
S2
=
0.5
Ω,
R
IN1
, R
IN2
=
10 kΩ, R
F1
, R
F2
=
4.3 kΩ
V
OF1
G1+
G1
V
L1+
V
L1−
−100
9
−1.5
3.65
0
11
4.0
−4.0
100
13
+1.5
−3.65
mV
dB
dB
V
V
3
AN8737SB
ICs for Optical Disk Drive
s
Electrical Characteristics at SV
CC
=
12 V, PV
CC1
=
5 V, PV
CC2
=
5 V, R
L
=
8
Ω,
V
REF
=
1.65 V,
V
SB
=
V
PC1
=
V
PC2
=
3.3 V, V
IN1
=
V
IN2
=
V
IN3
=
1.65 V, T
a
=
25°C (continued)
Parameter
Driver 3
R
L
=
8
Ω
V
OF3
G3+
G3
V
3+
V
3−
I
IN3
V
IN3N
=
5 V,
R
A1
=
27 kΩ, R
A2
=
6.8 kΩ
V
IN3N
=
0 V,
R
A1
=
27 kΩ, R
A2
=
6.8 kΩ
V
IN3N
=
0 V
SV
CC
=
12 V
SV
CC
=
12 V
V
SB
=
5 V
SV
CC
=
12 V
SV
CC
=
12 V
SV
CC
=
12 V
SV
CC
=
12 V
V
PC1
=
5 V
V
PC2
=
5 V
V
IN3P
=
V
IN3N
=
2.5 V
V
IN3P
=
2.5 V, V
IN3P
=
2.5 V±50 mV
No external resistor
−150
19
−1.5
3.05
−3.75
0
20.5
3.4
−3.4
50
70
70
150
22
+1.5
3.75
−3.05
1
0.7
120
0.7
0.7
120
120
mV
dB
dB
V
V
µA
Symbol
Conditions
Min
Typ
Max
Unit
Output offset voltage
Gain (+)
Relative gain (+/−)
Output voltage (+)
Output voltage (−)
Input pin bias current
Standby operation
High: Active, low or Hi-Z: Standby
V
SBH
V
SBL
I
SB
2.6
V
V
µA
High-level SB threshold voltage
Low-level SB threshold voltage
SB input current
Power cut operation
High: Active, low or Hiz: Power cut
V
PC1H
V
PC1L
V
PC2H
V
PC2L
I
PC1
I
PC2
V
RST
V
R
2.6
2.6
1.20
V
V
V
V
µA
µA
High-level PC1 threshold voltage
Low-level PC1 threshold voltage
High-level PC2 threshold voltage
Low-level PC2 threshold voltage
PC1 input current
PC2 input current
Reset current
Reset operation release supply
voltage
V
REF
detection voltage
•
Design reference data
4.5
V
V
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter
Thermal protection circuit
Operating temperature
equilibrium value
Operating temperature
hysteresis width
Temperature flag balancing
value
Temperature flag hysteresis
width
Symbol
Conditions
Min
Typ
Max
Unit
°C
°C
°C
°C
T
THD
∆T
THD
T
FLG
∆T
FLG
160
40
150
20
4
ICs for Optical Disk Drive
AN8737SB
s
Electrical Characteristics at SV
CC
=
12 V, PV
CC1
=
5 V, PV
CC2
=
5 V, R
L
=
8
Ω,
V
REF
=
1.65 V,
V
SB
=
V
PC1
=
V
PC2
=
3.3 V, V
IN1
=
V
IN2
=
V
IN3
=
1.65 V, T
a
=
25°C (continued)
•
Design reference data (continued)
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter
Symbol
∆T
TF
V
FLH
∆V
HD
SV
CC
=
12 V
Conditions
Min
Typ
Max
Unit
°C
V
V
Thermal protection circuit (continued)
Operating temperature difference bet.
thermal protection/temperature flag
Temperature flag output high
value
Supply voltage detection hysteresis
width
10
5
0.2
s
Usage Notes
1. Use SV
CC
at the maximum potential.
Otherwise it will cause operation error.
2. Do not use PV
CC1
and PV
CC2
at 2 V or less, or at the high impedance.
3. Driver 1, driver 2 gain setting
(Use a resistor of sufficient power dissipation for R
S
.)
R
E
C
E
4 or 1
R
IN
V
IN
R
FB
Input
pin
3 or 2 500
Ω
200
Ω
Forward
rotation pin
×
5 12 or 15
×
5 9 or 14
Pwr. amp.
R
L
4
Ω
R
S
0.5
Ω
V
REF
6 or 27 500
Ω
V
REF
5 or 28
Reverse
rotation pin
V
REF
4. On the mode of mute:
SB
=
PC1
=
high
PC2
=
high
Ch. 1, Ch. 2
Ch. 3
Active
Active
PC2
=
low or Hi-Z
Active
Mute
SB
=
PC1
=
low or Hi-Z
All mute,
power save
Never fail to input the same signal into SB pin (pin 24) and PC1 pin (pin 11).
5
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