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ICs for Compact Disc/CD-ROM Player
AN8730SB
4-channel driver IC for optical disk
s Overview
The AN8730SB is a 4-channel driver IC, which can operate in a low voltage, employing the low power consumption type H-bridge system with a switching regulator. It is especially suited for a portable CD/MD player.
1 28
0.30.1
Unit: mm
* Low power consumption due to PWM control of power supply * Wide output D-range independent of the reference voltage of the system * Enable to set input/output gain by an external resistor * Independent power on/off for 2 channels and simultaneous on/off for other 2 channels as well * Battery voltage detection circuit built-in * Thermal shut-down circuit (with hysteresis) built-in
14
0.10.1
15
(0.4) 7.20.3 9.30.3
SSOP028 P-0375A
s Applications
* Portable CD/MD
0.2 +0.1 -0.05 0.90.1 2.050.2
0.90.1
0.8
s Features
11.60.3
1
AN8730SB
s Block Diagram
ICs for Compact Disc/CD-ROM Player
SGND PGND
8 Power cut 21 25 BTL 24 Absolute value 23 BTL 22 Absolute value 19 BTL 20 Absolute value 17 BTL 18 Absolute value
12
STNBY
Thermal shut-down VREF detection
3 TRVSTOP
4 INTV
6 PC
5 INSP
10 LDON
9 INFO
11 INTR
VC TB
27 PWM 26 Maximum value 14 V REF 15 V SEN
CT
7
Triangular wave
16 EMP
28 13 SVCC 1 PVCC
CLK
2
2
PWMG
ICs for Compact Disc/CD-ROM Player
s Pin Descriptions
Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 Symbol PVCC CLK Description Supply voltage pin External sync. input pin Pin No. 15 16 17 18 19 20 21 22 23 24 25 26 27 28 Symbol VSEN EMP TR- TR+ FO- FO+ PGND SP+ SP- TV+ TV- TB VC PWMG
AN8730SB
Description Empty detection input pin Empty detection output pin Driver output pin Driver output pin Driver output pin Driver output pin Ground pin Driver output pin Driver output pin Driver output pin Driver output pin PWM circuit output pin Drive supply voltage pin PWM loop gain adjustment pin
TRVSTOP Driver on-off control pin INTV INSP PC CT SGND INFO LDON INTR STNBY SVCC VREF Driver input pin Driver input pin Driver on-off control pin Triangular wave oscillation pin Ground pin Driver input pin Driver on-off control pin Driver input pin Standby mode input pin Supply voltage pin VREF input pin
s Absolute Maximum Ratings
Parameter Supply voltage Symbol PVCC SVCC VC Supply voltage range PVCC SVCC Supply current Supply current 1 Supply current 2 Drive output current Power dissipation
*2
Rating 15 6 9 - 0.3 to +15.0 - 0.3 to +6.0 50 100 500 345 15.0 -25 to +75 -55 to +125
Unit V
V
ICC ISVCC IPVCC IO PD V10max Topr Tstg
*1
mA mA mA mA mW V C C
Max. application voltage to VSEN pin Operating ambient temperature Storage temperature
*1
Note) 1. 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. 2. *1: Except for the operating ambient temperature and storage temperature, all ratings are for Ta = 25C. *2: Ta = 75C. For the independent IC without a heat sink. Refer to "s Application Note" at mounting on PCB.
s Recommended Operating Range
Parameter Supply voltage Symbol PVCC SVCC Range 2.7 to 14.0 2.7 to 5.5 3 Unit V
AN8730SB
s Recommended Operating Range
Parameter Supply voltage Symbol PVCC SVCC
ICs for Compact Disc/CD-ROM Player
Range 2.7 to 14.0 2.7 to 5.5
Unit V
s Electrical Characteristics at SVCC = PVCC = 5 V, Ta = 25C
Parameter Supply current of SVCC at no load In standby mode supply current of SVCC at no load Supply current of PVCC at no load VC leak current Free-run oscillation frequency at CT pin CKL pin block CLK pin input threshold VTHH CLK pin input threshold VTHL Empty detection block EMP pin detection voltage Hysteresis width from EMP pin empty detection to recovery EMP pin output voltage VSEN pin input resistance Focus Transfer gain '+' '+' / '-' transfer gain relative ratio Dead zone converted to INFO pin input INFO pin input internal resistance Output offset voltage Max. output amplitude '+' Max. output amplitude '-' LDON pin high-level threshold LDON pin low-level threshold VREF pin driver on-off high-level threshold VREF pin driver on-off low-level threshold GF+ G+/G- IDZFO R9 VFOOFF
(OFF)
Symbol
Conditions PVCC = SVCC = 5 V, VREF = 1.5 V PVCC = SVCC = 5 V, VREF = 1.5 V STNBY = 0 V PVCC = SVCC = 5 V, VREF = 1.5 V VC = 9 V CT = 150 pF, 470 k
Min
Typ
Max
Unit
I13Q I13S I1Q IVCL f3F
4.2 0.8 3.4
7.0 2 5.5 10 165
mA mA mA A kHz
V2THH V2THL
fIN = 88.2 kHz fIN = 88.2 kHz
2.0

0.8
V V
V16TH1 V16H V16O R15 IEMP = +1.0 mA, VSEN = 1 V
1.7 50 21.5
1.85 80 25
1.9 110 0.5 28.5
V mV V k
VREF = 1.5 V VREF = 1.5 V VREF = 1.5 V VREF = 1.5 V, LDON = 3.0 V VREF = INFO = 1.6 V PVCC = SVCC = 5 V, VREF = 1.5 V PVCC = SVCC = 5 V, VREF = 1.5 V VREF = 1.6 V, INFO = 1.8 V VREF = 1.6 V, INFO = 1.8 V INFO = 1.8 V INFO = 1.8 V
11.3 -1.5 -10 0.8 -50 2.5 2.5 2.0 1.25
13.8 0 0 1.0 3.4 3.4
16.3 +1.5 +10 1.2 +50 1.0 0.75
dB dB mV k mV V V V V V V
VFOLM+ VFOLM- V10THH V10THL V14THH V14THL
4
ICs for Compact Disc/CD-ROM Player
s Electrical Characteristics at SVCC = PVCC = 5 V, Ta = 25C (continued)
Parameter (continued) Tracking Transfer gain '+' '+' / '-' transfer gain relative ratio Dead zone converted to INTR pin input INTR pin input internal resistance Output offset voltage Max. output amplitude '+' Max. output amplitude '-' Spindle Transfer gain '+' '+' / '-' transfer gain relative ratio Dead zone converted to INSP pin input INSP pin input internal resistance Output offset voltage Max. output amplitude '+' Max. output amplitude '-' PC pin threshold high-level PC pin threshold low-level Traverse Transfer gain '+' '+' / '-' transfer gain relative ratio Dead zone converted to INTV pin input INTV pin input internal resistance Output offset voltage Max. output amplitude '+' Max. output amplitude '-' TRVSTOP pin threshold high-level TRVSTOP pin threshold low-level PWM-comp. TB pin sink current ability VC level shift ITB VC VREF = 1.6 V, INFO = 2.1 V VREF = 1.6 V, INFO = 1.8 V 9 0.32 12 0.52 GTV+ G+/G- IDZTV R4 VTVOFF
(OUT)
AN8730SB
Symbol
Conditions
Min
Typ
Max
Unit
GTR+ G+/G- IDZTR R11 VTROFF
(OUT)
11.3 -1.5 -10 0.8 -50 2.5 2.5
13.8 0 0 1.0 0 3.4 3.4
16.3 +1.5 +10 1.2 +50
dB dB mV k mV V V
VTRLM+ VTRLM-
GSP+ G+/G- IDZSP R5 VSPOFF
(OUT)
17.5 -1.7 -10 0.8 -100 2.5 2.5 2.0
20.0 -0.2 0 1.0 0 3.4 3.4
22.5 +1.3 +10 1.2 +100 1.0
dB dB mV k mV V V V V
VSPLM+ VSPLM- V6THH V6THL
11.3 -1.8 -10 0.8 -50 2.5 2.5 2.0
13.8 -0.3 0 1.0 0 3.4 3.4
16.3 +1.2 +10 1.2 +50 1.0
dB dB mV k mV V V V V
VTVLM+ VTVLM- V6THH V3THL
15 0.62
mA V
5
AN8730SB
ICs for Compact Disc/CD-ROM Player
s Electrical Characteristics at SVCC = PVCC = 5 V, Ta = 25C (continued)
* Design reference data
Note) The characteristics listed below are theoretical values based on the IC design and are not guaranteed.
Parameter Temperature protection circuit Thermal shut-down operating temperature driver operation stop Thermal shut-down operating temperature hysteresis width
Symbol
Conditions
Min
Typ
Max
Unit C C
TON DT
150 30
s Application Note
* PD Ta curves of SSOP028-P-0375A PD T a
1 600
1 400 1 282 1 200 Mounted on standard board (glass epoxy: 50 x 50 x t0.8 mm3) Rth(j-a) = 78C/ W PD = 1 282 mW (25C)
Power dissipation PD (mW)
1 000
800 690 600 Independent IC without a heat sink Rth(j-a) = 145C/ W PD = 690 mW (25C)
400
200
0 0 25 50 75 100 125 150
Ambient temperature Ta (C)
6
ICs for Compact Disc/CD-ROM Player
s Application Circuit Example
12 STNBY
AN8730SB
SGND 8 Power cut PGND 21 25 TV 24 Absolute value 23 SP 22 Absolute value 19 FO 20 Absolute value 17 TR 18 Absolute value VC 27 PWM TB 26 Maximum value BTL BTL BTL BTL
Thermal shut-down VREF detection
3 TRVSTOP
4 INTV
6 PC
5 INSP
10 LDON
9
INFO
11
INTR
14 VREF 15 VSEN
CT 7
Triangular wave
16 EMP
PWMG 28
CLK
PVCC 1
SVCC 13
2
7

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