ICs for Compact Disc/CD-ROM Player
1
AN8746SA
PWM driver IC for portable CD player
s
Overview
The AN8746SA is a 4-channel actuator/motor
drive IC by DMOS direct PWM method for a
portable CD player.
s
Features
R
ON
=
1.8
(typ.)
Supply voltage range
(Control block: 2.0 V to 3.6 V, power block: 1.2 V
to 3.6 V)
Current at standby
(Control block: 1
A or less, power block: 1
A or
less)
With an output pin of monitoring 1/2 of the power
supply voltage
s
Applications
Portable CD player
SSOP032-P-0300
Unit: mm
s
Block Diagram
1
16
(0.5)
(0.625)
32
11.00.3
6.10.3
0.650.10
0.650.10
0.10.1
1.50.2
8.10.3
17
0.65
0.3
+0.10
0.05
0.2
+0.10
0.05
Seating plane
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Reset
TSD
VBG
V
M1
monitor
Logic circuit
Logic circuit
Pre-
driver
Pre-
driver
Pre-
driver
Pre-
driver
V
G
limiter
H
bridge
H
bridge
H
bridge
H
bridge
V
M4
AC
PC
Fi4
Ri4
Ro4
PGND4
Fo
4
Fo
3
PGND3
Ro3
Ri3
Fi3
V
GI
V
GO
V
M3
V
M1
V
C
MON
Fi1
Ri1
Ro1
PGND1
Fo
1
Fo
2
PGND2
Ro2
Ri2
Fi2
GND
N.C.
V
M2
Logic circuit
Logic circuit
AN8746SA
ICs for Compact Disc/CD-ROM Player
2
Pin No.
Symbol
Description
17
V
M3
Ch.3 power supply
18
V
GO
Gate voltage clamp output
19
V
GI
Gate voltage input pin
20
Fi3
Ch. 3 forward direction input pin
21
Ri3
Ch. 3 reverse direction input pin
22
Ro3
Ch. 3 reverse direction output pin
23
PGND3
Ch. 3 power ground
24
Fo3
Ch. 3 forward direction output pin
25
Fo4
Ch. 4 forward direction output pin
26
PGND4
Ch. 4 power ground
27
Ro4
Ch. 4 reverse direction output pin
28
Ri4
Ch. 4 reverse direction input pin
29
Fi4
Ch. 4 forward direction input pin
30
PC
Power cut pin
31
AC
All cut-off pin
32
V
M4
Ch. 4 power supply
s
Pin Descriptions
Pin No.
Symbol
Description
1
V
M1
Ch. 1 power supply
2
V
C
Control circuit power supply
3
MON
VM1 monitor
4
Fil
Ch. 1 forward direction input pin
5
Ril
Ch. 1 reverse direction input pin
6
Rol
Ch. 1 reverse direction output pin
7
PGND1
Ch. 1 power ground
8
Fo1
Ch. 1 forward direction output pin
9
Fo2
Ch. 2 forward direction output pin
10
PGND2
Ch. 2 power ground
11
Ro2
Ch. 2 reverse direction output pin
12
Ri2
Ch. 2 reverse direction intput pin
13
Fi2
Ch. 2 forward direction input pin
14
GND
Control circuit ground
15
N.C.
16
V
M2
Ch. 2 power supply
Parameter
Symbol
Range
Unit
Supply voltage
V
C
2.0 to 2.4 to 3.6
V
V
M
1.2 to 2.4 to 3.6
V
GI
V
M
+
3.5 to 7.0 to 8.0
Signal input voltage
V
IN
0 to V
C
V
s
Recommended Operating Range
Parameter
Symbol
Rating
Unit
Supply voltage
V
C
5
V
V
M
7
V
GI
8.2
Supply current
I
DD
500
mA
Power dissipation
*2
P
D
400
mW
Operating ambient temperature
*1
T
opr
-
30 to
+
75
C
Storage temperature
*1
T
stg
-
55 to
+
150
C
s
Absolute Maximum Ratings
Note) *1: Except for the operating ambient temperature and storage temperature, all ratings are for T
a
=
25
C.
*2: Use within the range of P
D
=
390 mW or less at T
a
=
75
C, following the allowable power dissipation characteristic curve
of "s Application Notes".
ICs for Compact Disc/CD-ROM Player
AN8746SA
3
s
Electrical Characteristics at V
C
=
2.4 V, V
M12
=
V
M34
=
2.4 V, V
GI
=
7.0 V, AC
=
PC
=
2.4 V, R
L
=
8
,
T
a
=
25
C
Parameter
Symbol
Conditions
Min
Typ
Max
Unit
Power supply current at mute
I
MO
PC
=
0 V, AC
=
V
C
=
2.4 V or
1
A
(at PC
=
L or V
C
=
L)
*1
V
C
=
PC
=
AC
=
0 V
Control supply current at all cut
I
CO
AC
=
L, PC
=
L
1
A
(at AC
=
L or PC
=
L)
Control supply current at operating
*2
I
C
AC
=
PC
=
V
C
=
2.4 V
0.5
1
mA
Pre-driver supply current
I
GO
AC
=
0 V
1
A
at all cut (at AC
=
L)
*2
Pre-driver supply current
I
G
AC
=
PC
=
V
C
=
2.4 V
0.5
1
mA
at operation (at V
GI
=
7 V)
*2
PWM input voltage high-level
V
INH
AC
=
PC
=
V
C
=
2.4 V
V
C
-
0.6
V
Fil to Fi4
=
Ril to Ri4
=
H
PWM input voltage low-level
V
INL
AC
=
PC
=
V
C
=
2.4 V
0.6
V
Fil to Fi4
=
Ril to Ri4
=
L
PWM input current high-level
I
INH
AC
=
PC
=
V
C
=
2.4 V
1
A
Fil to Fi4
=
Ril to Ri4
=
H
PWM input current low-level
I
INL
AC
=
PC
=
V
C
=
2.4 V
-
1
A
Fil to Fi4
=
Ril to Ri4
=
L
Driver on resistance
R
ON
AC
=
PC
=
V
C
=
2.4 V
1.8
2.5
(upper and lower)
Output propagation delay time
t
Dr
AC
=
PC
=
V
C
=
2.4 V
0.2
1
s
at rising
*2
Output propagation delay time
t
Df
AC
=
PC
=
V
C
=
2.4 V
0.2
1
s
at falling
*2
Output propagation delay time
t
D
AC
=
PC
=
V
C
=
2.4 V
-
0.3
0.3
s
difference t
Dr
-t
Df
Minimum input pulse width
*3
t
min
AC
=
PC
=
V
C
=
2.4 V
0.3
s
V
M
monitor output voltage width
V
MON
AC
=
PC
=
V
C
=
2.4 V
1.1
1.2
1.3
V
V
M
monitor output gain
G
MON
AC
=
PC
=
V
C
=
2.4 V
0.45
0.5
0.55
Power output pin flow-out/in
I
HZ
AC
=
PC
=
V
C
=
0 V
-
50
50
A
current at low V
C
*1
V
M
monitor output voltage at
LMON V
M12
=
V
M34
=
5.0 V
1.7
1.9
2.1
V
V
C
limit
AC
=
PC
=
V
C
=
1.9 V
Note) *1: AC pin and PC pin are connected to V
C
pin via a protective diode.
AC pin and PC pin must be set to 0 V at V
C
=
0 V to avoid excessive flow-in current.
*2: Measure at f
=
44.1 kHz and in duty ratio
=
50%.
*3: Measure at f
=
44.1 kHz. Output pulse width must be
t
min
/2.
AN8746SA
ICs for Compact Disc/CD-ROM Player
4
s
Electrical Characteristics at V
C
=
2.4 V, V
M12
=
V
M34
=
2.4 V, V
GI
=
7.0 V, AC
=
PC
=
2.4 V, R
L
=
8
,
T
a
=
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
T
THD
145
C
temperature
Thermal protection hysteresis
T
THD
20
C
width
s
Usage Notes
1. Care should be taken so as not to cause any of the following conditions on use of this IC. If the following conditions
come up, the IC is likely to break down or to be smoking.
Short-circuit between output pins
Short-circuit between output pin and GND
Short-circuit between output pin and power supply
(Output pin refers to any of those Fo1 (pin 8), Ro1 (pin 6), Fo2 (pin 9), Ro2 (pin 11), Fo3 (pin 24), Ro3 (pin 22),
Fo4 (pin 25), Ro4 (pin 27). GND refers to any of those GND (pin 14), PGND1 (pin 7), PGND2 (pin 10), PGND3
(pin 23), PGND4 (pin 26). Power supply refers to any of those V
C
(pin 2), V
GI
(pin 19), V
M1
(pin 1), V
M2
(pin16),
V
M3
(pin 17), V
M4
(pin 32).
2. V
M1
monitor pin (pin 3) outputs approximately one half of V
M1
voltage and its upper limit is V
C
supply voltage. This
is meant to prevent the DSP connected to this Pin from damage when the voltage exceeding an operating supply
voltage range is inputted to the V
M1
pin. On use of this pin, therefore, note that no value exceeding V
C
is outputted.
s
Application Notes
1. P
D
T
a
curves of SSOP032-P-0300
P
D
T
a
Po
wer dissipation
P
D
(W)
Ambient temperature T
a
(
C)
0.000
0
25
50
75
100
125
150
1.400
1.288
1.200
1.000
0.800
0.667
0.600
0.400
0.200
Independent IC
without a heat sink
R
th(j-a)
=
187.2
C/W
Mounted on standard board
(glass epoxy:
50 mm
50 mm
t0.8 mm)
R
th(j-a)
=
97.0
C/W
ICs for Compact Disc/CD-ROM Player
AN8746SA
5
s
Application Notes
2. Logic table of driver
s
Application Circuit Example
V
C
PC
Fil to Fi4
Ril to Ri4
Fol to Fo3
Rol to Ro3
Fo4
Ro4
H
H
L
L
L
L
L
L
H
H
L
H
L
H
L
H
H
H
H
L
H
L
L
L
H
H
H
H
L
L
H
L
H
L
X
X
L
L
L
L
L
X
X
X
Hi-Z
Hi-Z
Hi-Z
Hi-Z
Note) AC
=
H on the above logic table. H stands for V
C
power supply potential, L for GND potential (0 V) and X for H or L.
Hi-Z indicates that the driver output pin becomes a high impedance state.
Logic input pin must not be left open. And do not apply any other voltages than H or L.
M
M
V
GI
=
7 V
V
M
=
2.4 V
V
C
=
2.4 V/0 V
DSP
Micro-
computer
DSP
32
31
30
29
28
27
26
25
24
23
22
21
20
19
18
17
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Reset
TSD
VBG
V
M1
monitor
Logic circuit
Logic circuit
Pre-
driver
Pre-
driver
Pre-
driver
Pre-
driver
V
G
limiter
H
bridge
H
bridge
H
bridge
H
bridge
V
M4
AC
PC
Fi4
Ri4
Ro4
PGND4
Fo
4
Fo
3
PGND3
Ro3
Ri3
Fi3
V
GI
V
GO
V
M3
V
M1
V
C
MON
Fi1
Ri1
Ro1
PGND1
Fo
1
Fo
2
PGND2
Ro2
Ri2
Fi2
GND
N.C.
V
M2
Logic circuit
Logic circuit
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