ICs for Compact Disc/CD-ROM Player
AN8789FB
4-channel driver IC for portable CD/MD player
s
Overview
The AN8789FB is a low power consumption H-
bridge system 4-channel driver with a switching regula-
tor incorporating DC-DC converter which allows for low
supply voltage operation. It is especially suited for a por-
table CD/MD player.
33
34
23
(1.00)
Unit: mm
12.00±0.20
10.00±0.20
M
ain
Di
sc te
on na
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d
s
Features
44
22
10.00±0.20
12.00±0.20
•
Low power consumption due to PWM control of driver
supply by an external circuit.
•
Chargeable battery driving is possible due to a built-in
rapid charging circuit.
•
DC-DC converter can be constructed with an external
circuit.
•
Rationalization of set design due to a built-in reset circuit
with mute and battery voltage detection circuit.
•
Ripple filter for D/A converter can be constructed with
one external capacitor.
•
Thermal shut-down circuit built-in (with hysteresis)
s
Applications
•
Portable CD/MD player
•
CD/MD player
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(1.00)
0.80
1.95±0.20
12
1
11
0.35
+0.10
–0.05
(1.00)
Seating plane
0.10±0.10
0.15
–0.05
+0.10
0° to 10°
0.50±0.20
QFP044-P-1010C
Ma
int
en
an
ce
/D
isc
on
tin
ue
1
2
AN8789FB
START
PV
CC1
V
SEN
EMP
MRST
RESET
SP+
SP−
s
Block Diagram
PGND
TV+
TV−
FO+
FO−
TR+
TR−
TB
3
1
9
2
26
25
24
29
30
31
32
28
34
35
39
CT
37
36
Ma
int
en
an
ce
/D
isc
on
Starter
Triangular
wave
38
CLK
27
PWMG
44
PWM
BTL
BTL
BTL
BTL
Thermal
shut-down
Maximum
value
tin
ue
I
OUT
Absolute
value
Absolute
value
Absolute
value
Absolute
value
PV
CC2
40
POWER
Switching
circuit
5
OUT
Ripple
filter
I
CONT
DRV
CC
M
ain
Di
sc te
on na
tin nc
ue e/
d
23
10
4
14
11
12
7
6
8
IN
FB
DED
CRIP
SV
CC
AV
DD
SPRO
AREF
d
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Pl
ea
ne lud
Initial setting of
se
d m es
starter changeover
42
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41
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Power
off
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Rapid
charging
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circuit
co L a d t ty
33
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15
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16
18
19
20
21
22
PC
INSP
INTR
INTV
LDON
TRVSTOP
ICs for Compact Disc/CD-ROM Player
43
17
V
REF
INFO
SGND
ICs for Compact Disc/CD-ROM Player
s
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
Symbol
V
SEN
PV
CC1
RESET
DED
OUT
FB
IN
Description
Empty detection input pin
Power supply pin
Reset output pin
Dead time input pin
DC-DC converter output pin
Pin No.
23
24
25
26
27
28
Symbol
AN8789FB
Description
TRVSTOP Driver on-off control pin
TR−
TR+
FO−
FO+
Driver output pin
Driver output pin
Driver output pin
Driver output pin
CT
Triangular oscillation pin
10
11
12
13
14
15
16
17
18
19
20
21
22
AREF
CRIP
SV
CC
N.C.
1/2 AV
DD
output pin
Ripple rejection capacitor pin
Power supply pin
AV
DD
Ripple filter output pin
Power supply pin
DRV
CC
V
REF
1/2 V
CC
inpiut pin
INFO
INTR
Driver input pin
Driver input pin
LDON
INSP
PC
Driver on-off control pin
Driver input pin
Driver on-off control pin
s
Absolute Maximum Ratings
Supply voltage
an
ce
Parameter
/D
isc
on
tin
ue
INTV
Driver input pin
Supply voltage range
V
SEN
pin max. apply voltage
Supply current 1
Supply current 2
Supply current 3
Supply current 4
Driver output current
Note) 1. Do not apply external currents or voltages to any pins not specifically mentioned.
For circuit currents, '+' denotes currents flowing into the IC, and '−' denotes current flowing out of the IC.
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31
32
33
34
35
TV+
TV−
Driver output pin
Driver output pin
I
CONT
Charge current setting pin
MRST
EMP
V
C
Muting reset output pin
Empty detection output pin
Driver supply voltage pin
36
37
38
TB
PWM circuit output pin
CLK
External sync. input pin
39
40
START
Oscillation start input pin
Power on-off input pin
POWER
PV
CC2
I
OUT
41
42
43
44
Power supply pin
Charge-cum-battery check pin
SGND
GND pin
PWMG
Symbol
Rating
14.5
6
Unit
V
PV
CC1
, PV
CC2
SV
CC
, DRV
CC
PV
CC1
, PV
CC2
−
0.3 to
+14.5
−
0.3 to
+6
14.5
50
50
100
50
500
V
SV
CC
, DRV
CC
V
1max
I
SVCC
I
DRVCC
I
PVCC1
I
PVCC2
I
O
V
mA
mA
mA
mA
mA
Ma
int
en
M
ain
Di
sc te
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tin nc
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d
Error amp. output pin
PGND
SP+
SP−
Error amp. input pin
29
30
SPRO
Short circuit protection input pin
GND pin
Driver output pin
Driver output pin
PWM loop gain adjustment pin
3
AN8789FB
s
Absolute Maximum Ratings (continued)
Parameter
Power dissipation
*1, *2
Operating ambient temperature
*1
Storage temperature
*1
Symbol
P
D
T
opr
T
stg
ICs for Compact Disc/CD-ROM Player
Rating
490
−25
to
+75
−55
to
+150
Unit
mW
°C
°C
Note) 1. Do not apply external currents or voltages to any pins not specifically mentioned.
For circuit currents, '+' denotes currents 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 T
a
=
25°C.
*2: T
a
=
85°C. For the independent IC without a heat sink.
Refer to "s Application Notes" at mounting on PCB.
s
Recommended Operating Range
Parameter
Supply voltage
s
Electrical Characteristics at SV
CC
=
DRV
CC
=
3.2 V, PV
CC1
=
2.4 V, PV
CC2
=
0 V, T
a
=
25°C
Parameter
Symbol
Conditions
Min
Typ
Max
Common block
SV
CC
power supply current at
no load
I
12Q
DRV
CC
power supply current at
no load
PV
CC1
power supply current at
no load
PV
CC1
bias current
I
15Q
I
2Q
I
2L
DC-DC converter block
SV
CC
pin threshold voltage
FB pin output voltage
(source current)
FB pin output voltage
(sink current)
*
Ma
int
en
an
At I
OUT
pin open
PV
CC2
power supply current
ce
I
41MAX
Error amplifier
V
12TH
V
6+
V
6−
Note) *: Output voltage OUT be kept at low-level in measuring an output voltage (sink current) of FB pin.
4
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Symbol
PV
CC1
Range
Unit
V
1.5 to 14
3 to 14
PV
CC2
SV
CC
, DRV
CC
2.7 to 5.5
Unit
PV
CC1
=
2.4 V
SV
CC
=
DRV
CC
=
3.2 V, V
REF
=
1.6 V
PV
CC1
=
2.4 V
SV
CC
=
DRV
CC
=
3.2 V, V
REF
=
1.6 V
PV
CC1
=
2.4 V
SV
CC
=
DRV
CC
=
3.2 V, V
REF
=
1.6 V
PV
CC1
=
14 V
SV
CC
=
DRV
CC
=
0 V, V
REF
=
0 V
PV
CC1
=
0 V, PV
CC2
=
5 V
SV
CC
=
DRV
CC
=
0 V, V
REF
=
0 V
I
CONT
pin short circuit.
I
FB
=
0
µA
3
4.5
mA
2.8
1.7
4.2
3
mA
mA
µA
100
25
11
18
mA
3.25
1.6
3.42
1.8
3.59
2
V
IN
=
0.8 V, I
FB
= −100 µA
IN
=
1.5 V, I
FB
=
100
µA
V
0.25
V
M
ain
Di
sc te
on na
tin nc
ue e/
d
/D
isc
on
tin
ue
ICs for Compact Disc/CD-ROM Player
AN8789FB
s
Electrical Characteristics at SV
CC
=
DRV
CC
=
3.2 V, PV
CC1
=
2.4 V, PV
CC2
=
0 V, T
a
=
25°C (continued)
Parameter
Short circuit protection circuit
SPRO pin bias voltage
SPRO pin impedance
SPRO pin output voltage
(at FB
=
high)
SPRO pin output voltage
(at POWER
=
low)
V
8B
R
8
V
8FB
V
8PO
V
IN
=
1.5 V, POWER
=
high
V
IN
=
1.5 V
POWER
=
high, V
IN
=
0.8 V
POWER
=
low, V
IN
=
1.5 V
V
CT
=
0.2 V, V
IN
=
1.5 V
0.77
22
1.3
1.9
0.86
32
1.8
2.5
1.11
0.94
45
2.3
3
1.2
V
kΩ
V
V
V
Symbol
Conditions
Min
Typ
Max
Unit
High-level voltage at
OUT pin in self running
V
5H
V
5L
Low-level voltage at
OUT pin in self running
High-level at OUT pin at
starting
V
5HS
D
5S
Pulse max. duty at OUT pin at
starting
Pulse max. duty at OUT pin in
CLK sync.
Pulse max. duty at OUT pin in
self running
D
5C
D
5F
f
9F
f
9S
Triangular oscillation frequency
at CT pin in self running
Triangular oscillation frequency
at CT pin at starting
Output current at CT pin in
self running (source current)
I
O−F
Ma
int
en
Output current ratio at CT pin in I
O
+
/I
O−
V
CT
=
1 V
self running
(RFEE)
(source current/sink current)
Triangular wave oscillating
PV
CC1
voltage
Dead time pin block
DED pin impedance
DED pin bias voltage
V
2MIN
R
4
V
4B
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co L a d t ty
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V
CT
=
0 V, I
OUT
= −10
mA
V
FB
=
0.7 V
1.08
0.15
0.7
53
1.5
0.3
1.71
0.4
V
V
CT
=
1.0 V, I
OUT
= +10
mA
V
FB
=
0.5 V
V
V
CT
=
1.0 V, PV
CC1
=
1.5 V
I
OUT
= −1.1
mA, SV
CC
=
0 V
0.92
64
1.3
75
V
PV
CC1
=
5.0 V, SV
CC
=
0.0 V
V
IN
=
0.8 V
V
IN
=
0.8 V
%
65
75
75
81
85
87
%
%
53
64
75
kHz
PV
CC1
=
5 V, SV
CC
=
0 V
V
CT
=
0.3 V
70
90
100
82
kHz
µA
42
60
1.25
1.55
2.00
SV
CC
=
0 V
1.5
V
V
IN
=
1.5 V, V
POWER
=
3 V
V
START
=
3 V
40
60
80
kΩ
V
V
IN
=
1.5 V, V
POWER
=
3 V
V
START
=
3 V
0.72
0.8
0.92
5
an
ce
M
ain
Di
sc te
on na
tin nc
ue e/
d
SPRO pin threshold voltage
Output block
V
8TH
1.03
/D
isc
on
tin
ue
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