PANASONIC AN8737SB

ICs for Optical Disk Drive
AN8737SB
3-channel driver IC for optical disk drive
■ Overview
Unit: mm
18.4±0.2
(5.15)
(4.8)
28
22
21
15
+0.10
0.30–0.05
(1.315)
8.3±0.2
10.93±0.30
The AN8737SB is a BTL type 3-channel driver
IC, adopting a current feedback system for 2 channels, 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.
0° to 10°
1
7
8
14
■ 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/IO = 800 mA)
• Standby function built in (all channels can be
muted.)
• Thermal shut-down circuit built in
• With thermal flag pin
(6.4)
(1.2)
0.8
0.35+0.10
–0.05
Seating plane
0.1±0.1
2.7±0.2
0.65±0.20
HSOP042-P-0400
■ Applications
• CD/CD-ROM player
• DVD/DVD-ROM drive
1
AN8737SB
ICs for Optical Disk Drive
PVCC2
21
VO3+
19
Temp.
det.
16 VO3−
20 TFLG
VCC
det.
SVCC
1
2 VCC
PGND1
7
VO2−
14
28
VS2
VO2+
15
VO1+
12
VS1
5
9
8
VO1−
PVCC1
■ Block Diagram
1
2 VCC
13
17
PGND2
Reset
18
SGND
Fin
25
IN3P
23
IN3N
24
SB
11
PC1
VFB2
VRB1
IN1
OUT1
OUT2
IN2
27
10
6
N.C.
3
4
1
2
VREF
VREF
reset
26
■ Pin Descriptions
Pin No.
2
Description
Pin No.
Description
1
Ch. 2 first stage feedback pin
16
Ch. 3 reverse direction output pin
2
Ch. 2 first stage input pin
17
Ch. 3 power side grounding pin
3
Ch. 1 first stage input pin
18
Ch. 3 mute pin
4
Ch. 1 first stage feedback pin
19
Ch. 3 forward direction output pin
5
Ch. 1 current feedback input pin
20
TDS flag pin
6
Ch. 1 current feedback output pin
21
Ch. 3 power side power supply pin
7
Control side power supply pin
22
N.C.
8
Ch. 1 & ch. 2 power side power supply pin
23
Ch. 3 reverse rotation input pin
9
Ch. 1 reverse direction output pin
24
Standby input pin
10
N.C.
25
Ch. 3 forward rotation input pin
11
Ch. 1 & Ch. 2 mute pin
26
Reference voltage input pin
12
Ch. 2 forward direction output pin
27
Ch. 2 current feedback output pin
13
Ch. 1 & ch. 2 power side grounding pin
28
Ch. 2 current feedback input pin
14
Ch. 2 reverse direction output pin
Fin
Control side grounding pin
15
Ch. 2 forward direction output pin
PC2
ICs for Optical Disk Drive
AN8737SB
■ Absolute Maximum Ratings
Parameter
Symbol
Rating
Unit
VCC
14.0
V
SVCC , PVCC1 , PVCC2
− 0.3 to +14.0
V
ISVCC
500
mA
IPVCC1
2.0
A
IPVCC2
800
mA
PD
542
mW
Topr
−30 to +85
°C
Tstg
−55 to +150
°C
Supply voltage
Supply voltage range
Supply current
*2
Power dissipation
*3
Operating ambient temperature
Storage temperature
*1
*1
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25°C.
*2: IPVCC1 be 1 A or less for channel 1 and channel 2, respectively.
*3: Use within the range of PD = 542 mW or less at Ta = 85°C, following the allowable power dissipation characteristic curve
of "■ Application Notes".
■ Recommended Operating Range
Parameter
Supply voltage
Symbol
Range
Unit
SVCC
4.5 to 13.5
V
PVCC1 , PVCC2
3.5 to 13.5
■ Electrical Characteristics at SVCC = 12 V, PVCC1 = 5 V, PVCC2 = 5 V, RL = 8 Ω, VREF = 1.65 V,
VSB = VPC1 = VPC2 = 3.3 V, VIN1 = VIN2 = VIN3 = 1.65 V, Ta = 25°C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Current consumption 1
(no signal)
ISVO
VIN1 = VIN2 = VREF , VIN3P = 2.5 V
VSB = VPC1 = VPC2 = 3.3 V

25
45
mA
Current consumption 2
(no signal)
IPVO
VIN1 = VIN2 = VREF , VIN3P = 2.5 V
VSB = VPC1 = VPC2 = 3.3 V

25
45
mA
Current consumption 1
(standby)
ISVSB
VIN1 = VIN2 = VREF , VIN3P = 2.5 V
VSB = VPC1 = VPC2 = 0 V

0.6
1.5
mA
Current consumption 2
(standby)
IPVSB
VIN1 = VIN2 = VREF , VIN3P = 2.5 V
VSB = VPC1 = VPC2 = 0 V

0.2
1.0
mA
Driver 1, Driver 2
RL1 , RL2 = 4 Ω, RS1 , RS2 = 0.5 Ω, RIN1 , RIN2 = 10 kΩ, RF1 , RF2 = 4.3 kΩ
Output offset voltage
VOF1
VIN = VREF
Gain (+)
G1+
VIN = VREF ±50 mV
Relative gain (+/−)
G1
Maximum output amplitude (+)
VL1+
VIN = 3.3 V, RL1 , RL2 = 4 Ω
RS1 , RS2 = 0.5 Ω
Maximum output amplitude (−)
VL1−
VIN = 0 V, RL1 , RL2 = 4 Ω
RS1 , RS2 = 0.5 Ω
−100
0
100
mV
9
11
13
dB
−1.5

+1.5
dB
3.65
4.0

V

−4.0
−3.65
V
3
AN8737SB
ICs for Optical Disk Drive
■ Electrical Characteristics at SVCC = 12 V, PVCC1 = 5 V, PVCC2 = 5 V, RL = 8 Ω, VREF = 1.65 V,
VSB = VPC1 = VPC2 = 3.3 V, VIN1 = VIN2 = VIN3 = 1.65 V, Ta = 25°C (continued)
Parameter
Driver 3
Symbol
Conditions
Min
Typ
Max
Unit
−150
0
150
mV
19
20.5
22
dB
−1.5

+1.5
dB
RL = 8 Ω
Output offset voltage
VOF3
VIN3P = VIN3N = 2.5 V
Gain (+)
G3+
VIN3P = 2.5 V, VIN3P = 2.5 V±50 mV
No external resistor
Relative gain (+/−)
G3
Output voltage (+)
V3+
VIN3N = 5 V,
RA1 = 27 kΩ, RA2 = 6.8 kΩ
3.05
3.4
3.75
V
Output voltage (−)
V3−
VIN3N = 0 V,
RA1 = 27 kΩ, RA2 = 6.8 kΩ
−3.75
−3.4
−3.05
V
Input pin bias current
IIN3
VIN3N = 0 V


1
µA
Standby operation
High: Active, low or Hi-Z: Standby
High-level SB threshold voltage
VSBH
SVCC = 12 V
2.6


V
Low-level SB threshold voltage
VSBL
SVCC = 12 V


0.7
V
VSB = 5 V

50
120
µA
SB input current
Power cut operation
ISB
High: Active, low or Hiz: Power cut
High-level PC1 threshold voltage
VPC1H
SVCC = 12 V
2.6


V
Low-level PC1 threshold voltage
VPC1L
SVCC = 12 V


0.7
V
High-level PC2 threshold voltage
VPC2H
SVCC = 12 V
2.6


V
Low-level PC2 threshold voltage
VPC2L
SVCC = 12 V


0.7
V
PC1 input current
IPC1
VPC1 = 5 V

70
120
µA
PC2 input current
IPC2
VPC2 = 5 V

70
120
µA
VRST


4.5
V
VR
1.20


V
Reset current
Reset operation release supply
voltage
VREF detection voltage
• 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 circuit
4
Operating temperature
equilibrium value
TTHD

160

°C
Operating temperature
hysteresis width
∆TTHD

40

°C
Temperature flag balancing
value
TFLG

150

°C
Temperature flag hysteresis
width
∆TFLG

20

°C
ICs for Optical Disk Drive
AN8737SB
■ Electrical Characteristics at SVCC = 12 V, PVCC1 = 5 V, PVCC2 = 5 V, RL = 8 Ω, VREF = 1.65 V,
VSB = VPC1 = VPC2 = 3.3 V, VIN1 = VIN2 = VIN3 = 1.65 V, Ta = 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
Conditions
Min
Typ
Max
Unit

10

°C

5

V

0.2

V
Thermal protection circuit (continued)
Operating temperature difference bet.
thermal protection/temperature flag
∆TTF
Temperature flag output high
value
VFLH
Supply voltage detection hysteresis
width
∆VHD
SVCC = 12 V
■ Usage Notes
1. Use SVCC at the maximum potential.
Otherwise it will cause operation error.
2. Do not use PVCC1 and PVCC2 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 RS .)
CE
4 or 1
RE
RIN
Input
pin
200 Ω
3 or 2 500 Ω
VIN
RFB
Forward
rotation pin
× 5 12 or 15
RL
× 5 9 or 14
4Ω
RS
0.5 Ω
Pwr. amp.
VREF
VREF
6 or 27 500 Ω
5 or 28
Reverse
rotation pin
VREF
4. On the mode of mute:
SB = PC1 = high
SB = PC1 = low or Hi-Z
PC2 = high
PC2 = low or Hi-Z

Ch. 1, Ch. 2
Active
Active
All mute,
Ch. 3
Active
Mute
power save
Never fail to input the same signal into SB pin (pin 24) and PC1 pin (pin 11).
5
AN8737SB
ICs for Optical Disk Drive
■ Usage Notes (continued)
5. On the output maximum amplitude (Reference data: typical value)
Output maximum amplitude (V)
5.0
4.5
4.0
3.5
3.0
0.4
0.6
0.8
1.0
1.1
Load current (A)
Use load current at 1 A or less.
6
Appropriate care should be taken on the characteristics.
When changing an external circuit constant on actual use, secure an appropriate margin in consideration of characteristic fluctuation of external parts and our ICs including transient characteristics as well as static ones.
7
Avoid the short-circuits between output pin or current detection pin and VCC (line-to-supply fault), output pin or
current detection pin and GND (line-to-ground fault), and output pins or output pin and current detection pin (load
short-ciruit).
8
An appropriate prior study should be done for use of dip soldering.
9
Care should be taken on use of the following pin because of its low static breakdown voltage (C = 200 pF, R = 0 Ω).
Pin 18: Breakdown at 200 V
6
ICs for Optical Disk Drive
AN8737SB
■ Application Notes
• PD  Ta curves of HSOP042-P-0400
PD  T a
2.500
2.240
Power dissipation PD (W)
2.000
Mounted on standard board
(glass epoxy:
75 mm × 75 mm × t1.6 mm)
Rth(j-a) = 55.8°C/W
1.500
1.042
1.000
Independent IC
without a heat sink
Rth(j-a) = 119.9°C/W
0.500
0.000
0
25
50
75
100
125
150
Ambient temperature Ta (°C)
7
AN8737SB
ICs for Optical Disk Drive
■ Application Circuit Example
Snubber
Snubber
12 V
VCC
det.
Temp.
det.
5V
21 PVCC2
TFLG
20
SVCC
7
1
2 VCC
19 VO3+
RL2
8.0 Ω
High: High
temp.
14 VO2−
28 VS2
VS1
5
15 VO2+
VO1−
9
12 VO1+
PVCC1
8
RS2
0.5 Ω
16 VO3−
RL2
4.0 Ω
RL1
4.0 Ω
RS1
0.5 Ω
5V
1
2 VCC
PGND1 13
17 PGND2
Reset
18
VREF
reset
VREF 26
PC2
1.65 V
RIN2
= 10 kΩ
8
4.7 kΩ
RIN2
= 10 kΩ
High: Active
Low : All mute
power save
Fin
SGND
25
23
SB 24
PC1 11
VFB2 27
27 kΩ
4.3 kΩ
IN3P
4.7 kΩ
6.8 kΩ
560 pF
IN3N
4.3 kΩ
2
1
OUT2
560 pF
IN2
4
3
IN1
OUT1
6
10
VRB1
N.C.