ICs for Compact Disc/CD-ROM Player
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.
11.0±0.3
32
17
Unit: mm
s
Features
•
R
ON
=
1.8
Ω
(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
µA
or less, power block: 1
µA
or
less)
•
With an output pin of monitoring 1/2 of the power
supply voltage
0.65±0.10
1.5±0.2
1
16
6.1±0.3
8.1±0.3
(0.5)
0.2
+0.10
–0.05
(0.625)
0.65
0.3
–0.05
Seating plane
SSOP032-P-0300
s
Applications
•
Portable CD player
s
Block Diagram
PGND4
PGND3
0.1±0.1
+0.10
0.65±0.10
V
GO
18
15
N.C.
V
M4
32
31
30
29
28
27
26
25
24
23
22
21
20
19
Logic circuit
Reset
TSD
Pre-
driver
H
bridge
H
bridge
Logic circuit
Pre-
driver
V
G
limiter
VBG
Pre-
driver
V
M1
monitor Logic circuit
H
bridge
H
bridge
Pre-
driver
Logic circuit
10
11
12
13
14
Fi1
Ri1
Ro1
PGND1
Fo1
Fo2
PGND2
Ro2
Ri2
MON
Fi2
GND
V
M1
V
C
V
M2
16
1
2
3
4
5
6
7
8
9
17
V
M3
Ro4
Ro3
V
GI
Fo4
Fo3
Ri4
Ri3
AC
Fi4
Fi3
PC
1
AN8746SA
s
Pin Descriptions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Symbol
V
M1
V
C
MON
Fil
Ril
Rol
PGND1
Fo1
Fo2
PGND2
Ro2
Ri2
Fi2
GND
N.C.
V
M2
Description
Ch. 1 power supply
Control circuit power supply
VM1 monitor
Ch. 1 forward direction input pin
Ch. 1 reverse direction input pin
Ch. 1 reverse direction output pin
Ch. 1 power ground
Ch. 1 forward direction output pin
Ch. 2 forward direction output pin
Ch. 2 power ground
Ch. 2 reverse direction output pin
Ch. 2 reverse direction intput pin
Ch. 2 forward direction input pin
Control circuit ground
Ch. 2 power supply
ICs for Compact Disc/CD-ROM Player
Pin No.
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
Symbol
V
M3
V
GO
V
GI
Fi3
Ri3
Ro3
PGND3
Fo3
Fo4
PGND4
Ro4
Ri4
Fi4
PC
AC
V
M4
Description
Ch.3 power supply
Gate voltage clamp output
Gate voltage input pin
Ch. 3 forward direction input pin
Ch. 3 reverse direction input pin
Ch. 3 reverse direction output pin
Ch. 3 power ground
Ch. 3 forward direction output pin
Ch. 4 forward direction output pin
Ch. 4 power ground
Ch. 4 reverse direction output pin
Ch. 4 reverse direction input pin
Ch. 4 forward direction input pin
Power cut pin
All cut-off pin
Ch. 4 power supply
s
Absolute Maximum Ratings
Parameter
Supply voltage
Symbol
V
C
V
M
V
GI
Supply current
Power dissipation
*2
Operating ambient temperature
*1
Storage temperature
*1
I
DD
P
D
T
opr
T
stg
Rating
5
7
8.2
500
400
−30
to
+75
−55
to
+150
mA
mW
°C
°C
Unit
V
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".
s
Recommended Operating Range
Parameter
Supply voltage
Symbol
V
C
V
M
V
GI
Signal input voltage
V
IN
Range
2.0 to 2.4 to 3.6
1.2 to 2.4 to 3.6
V
M
+3.5
to 7.0 to 8.0
0 to V
C
V
Unit
V
2
ICs for Compact Disc/CD-ROM Player
AN8746SA
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
Ω,
T
a
=
25°C
Parameter
Power supply current at mute
(at PC
=
L or V
C
=
L)
*1
Control supply current at all cut
(at AC
=
L or PC
=
L)
Control supply current at operating
*2
Pre-driver supply current
at all cut (at AC
=
L)
*2
Pre-driver supply current
at operation (at V
GI
=
7 V)
*2
PWM input voltage high-level
PWM input voltage low-level
PWM input current high-level
PWM input current low-level
Driver on resistance
(upper and lower)
Output propagation delay time
at rising
*2
Output propagation delay time
at falling
*2
Output propagation delay time
difference t
Dr
-t
Df
Minimum input pulse width
*3
V
M
monitor output voltage width
V
M
monitor output gain
Power output pin flow-out/in
current at low V
C *1
V
M
monitor output voltage at
V
C
limit
Symbol
I
MO
I
CO
I
C
I
GO
I
G
V
INH
V
INL
I
INH
I
INL
R
ON
t
Dr
t
Df
∆t
D
t
min
V
MON
G
MON
I
HZ
Conditions
PC
=
0 V, AC
=
V
C
=
2.4 V or
V
C
=
PC
=
AC
=
0 V
AC
=
L, PC
=
L
AC
=
PC
=
V
C
=
2.4 V
AC
=
0 V
AC
=
PC
=
V
C
=
2.4 V
AC
=
PC
=
V
C
=
2.4 V
Fil to Fi4
=
Ril to Ri4
=
H
AC
=
PC
=
V
C
=
2.4 V
Fil to Fi4
=
Ril to Ri4
=
L
AC
=
PC
=
V
C
=
2.4 V
Fil to Fi4
=
Ril to Ri4
=
H
AC
=
PC
=
V
C
=
2.4 V
Fil to Fi4
=
Ril to Ri4
=
L
AC
=
PC
=
V
C
=
2.4 V
AC
=
PC
=
V
C
=
2.4 V
AC
=
PC
=
V
C
=
2.4 V
AC
=
PC
=
V
C
=
2.4 V
AC
=
PC
=
V
C
=
2.4 V
AC
=
PC
=
V
C
=
2.4 V
AC
=
PC
=
V
C
=
2.4 V
AC
=
PC
=
V
C
=
0 V
Min
V
C
−
0.6
−1
−
0.3
0.3
1.1
0.45
−50
1.7
Typ
0.5
0.5
1.8
0.2
0.2
1.2
0.5
1.9
Max
1
1
1
1
1
0.6
1
2.5
1
1
0.3
1.3
0.55
50
2.1
Unit
µA
µA
mA
µA
mA
V
V
µA
µA
Ω
µs
µs
µs
µs
V
µA
V
LMON V
M12
=
V
M34
=
5.0 V
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.
3
AN8746SA
ICs for Compact Disc/CD-ROM Player
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
Ω,
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
Thermal protection
Thermal protection operating
temperature
Thermal protection hysteresis
width
Symbol
Conditions
Min
Typ
Max
Unit
°C
°C
T
THD
∆T
THD
145
20
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
1.400
1.288
1.200
Mounted on standard board
(glass epoxy:
50 mm
×
50 mm
×
t0.8
mm)
R
th(j-a)
=
97.0°C/W
Power dissipation
P
D
(W)
1.000
0.800
0.667
0.600
Independent IC
without a heat sink
R
th(j-a)
=
187.2°C/W
0.400
0.200
0.000
0
25
50
75
100
125
150
Ambient temperature
T
a
(°C)
4
ICs for Compact Disc/CD-ROM Player
s
Application Notes
2. Logic table of driver
V
C
H
H
H
H
H
L
PC
H
H
H
H
L
X
Fil to Fi4
L
L
H
H
X
X
Ril to Ri4
L
H
L
H
X
X
Fol to Fo3
L
L
H
L
L
Hi-Z
Rol to Ro3
L
H
L
L
L
Hi-Z
AN8746SA
Fo4
L
L
L
H
L
Hi-Z
Ro4
L
H
L
L
L
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.
s
Application Circuit Example
DSP
⇔
Micro-
computer
⇔
M
M
V
GI
=
7 V
26 PGND4
23 PGND3
18 V
GO
15
N.C.
32 V
M4
Logic circuit
Reset
TSD
Pre-
driver
H
bridge
H
bridge
Logic circuit
Pre-
driver
V
G
limiter
VBG
Pre-
driver
V
M1
monitor Logic circuit
H
bridge
H
bridge
Pre-
driver
Logic circuit
PGND2 10
Ro2 11
Ri2 12
Fi2 13
GND 14
V
M1
1
MON 3
PGND1 7
DSP
⇔
V
C
=
2.4 V/0 V
V
M
=
2.4 V
V
M2
16
5
V
C
2
Fi1 4
Ri1 5
Ro1 6
Fo1 8
Fo2 9
17 V
M3
27 Ro4
22 Ro3
19 V
GI
25 Fo4
24 Fo3
28 Ri4
21 Ri3
31 AC
29 Fi4
20 Fi3
30 PC
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