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Structure
Product Name
:
:
Silicon Monolithic Integrated Circuit
Power Driver For Compact Disc Players
Device Name
:
BA5947FM
Features
:
• 4-ch BTL driver
• Use of an HSOP-M28 power package can achieve downsizing of the set.
• 3 channels are directly connected to the PWM input. (with a built-in primary
filter)
• For CH4, the input terminal can be switched by the SW terminal.
• A wide dynamic range (5.4V(typ.) when PreVcc=PowVcc=8V and RL=8Ω)
• A built-in thermal shutdown circuit is installed.
• PreVcc, PowVcc of CH1 and CH2, and PowVcc of CH3 and CH4 are provided
with power supplies independently and an efficient power supply voltage design
can be achieved.
• Using an external mute terminal, the output current can be muted.
• A built-in general operational amplifier installed.
{ ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
Parameter
Symbol
Power Supply Voltage
Vcc
Power Dissipation
Pd
Operating Temperature
Topr
Range
Storage Temperature
Tstg
Range
Limits
13.5
2.2 *1
Unit
V
W
-35 to 85
°C
-55 to 150
°C
{ RECOMMENDED OPERATING CONDITIONS (To determine a power supply voltage, the power
dissipation must be taken into consideration.)
PreVcc
PowVcc
6.0 to 13.2 V
6.0 to PreVcc
*1 When mounted on the glass/epoxy board with the size: 70 mm×70 mm, the thickness: 1.6 mm, and
the rate of copper foil occupancy area: 3% or less.
Over Ta=25°C, derating at the rate of 17.6mW/°C.
This product has not been checked for the strategic materials (or service) defined in the Foreign
Exchange and Foreign Trade Control Low of Japan so that a verification work is required before
exporting it.
Not designed for radiation resistance.
REV. A
2/4
{ ELECTRIC CHARACTERISTICS (Ta=25°C, Vcc=8V, RL=8Ω, Vb=VOP+=1.75V, unless otherwise noted.)
Parameter
Symbol
Consumption Current (at no
IQ
signal)
internal Vref Terminal Voltage
VREF
Mute OFF Voltage
VMON
Mute ON Voltage
VMOFF
Drivers not a spindle type (CH1, 2, 3)
Input High-level Voltage
VIH
Input Low-level Voltage
VIL
Input High-level Current
IIH
Input Low-level Current F
IILF
side
Input Low-level Current R
IILR
side
Output Offset Voltage
VOO
Maximum Output Amplitude
VOM
Spindle Drivers (CH4)
Input Bias Current
IB
Output Offset
VOO4
Maximum Output Amplitude
VOM
Voltage Gain 1
GVC1
Voltage Gain 2
Analog SW Input
Input High-level Voltage
Input Low-level Voltage
Input High-level Current
Input Low-level Current
Operational Amplifier
Offset Voltage
Input Bias Current
High-level Output Voltage
Low-level Output Voltage
Output Driving Current Sink
Output Driving Current
Source
Open-loop Voltage Gain
Slew Rate
MIN
-
TYP
17.0
MAX
25.0
Unit
Condition
mA no load applied
3.40
1.9
-
3.70
-
4.00
0.5
V
V
V
1.9
-0.3
170
-10
310
-
VCC
0.5
450
0
V
V
µA
µA
Vf=Vr=5V
Vf=0V
-50
-
0
µA
Vr=0V
-30
4.4
5.0
30
5.6
mV
V Vf=5V,Vr=0V
-50
9.3
10
5.4
11.3
300
50
13.3
GVC2
27.8
31.3
34.8
nA
mV VIN4=Vb
V Vb=4V
dB PIN24 and PIN25 are
shorted.
dB PIN24 and PIN25 are
shorted.
VIHSW
VILSW
IIHSW
IILSW
1.9
-0.3
-10
60
0
VCC
0.5
90
10
V
V
µA
µA
VOFOP
IBOP
VOHOP
VOLOP
Isink
source
-5
7.0
2.0
7.0
0
10
9.0
13.0
5
300
0.2
-
mV
nA
V
V
mA
mA
GVO
SR
-
65
0.5
-
VSW=3.5V
VSW=0V
dB VIN=-60dBV,1KHz
V/µs f=50kHz,2Vppsquare
wave, Vb=4V
{ OUTLINE DIMENSIONS, SYMBOLS
(MAX 18.85 include BURR)
(UNIT:mm)
REV. A
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{ BLOCK DIAGRAM
{ PIN NUMBERS, PIN NAMES
No.
Pin Name
Description
No.
Pin Name
1
OPIN-
2
OPIN+
3
SW
4
CH1FIN
operational amplifier negative
input terminal
operational amplifier positive
input terminal
CH4 input selecting switch
terminal
CH1PWM forward input
5
CH1RIN
6
7
CH2FIN
CH2RIN
8
GND
9
VREFIN
10
POWVCC
11
Description
15
CH4OUTR
CH4 reverse output terminal
16
CH4OUTF
CH4 forward output terminal
17
CH3OUTF
CH3 forward output terminal
18
CH3OUTR
CH1PWM reverse input
19
POWVCC
CH2PWM forward input
CH2PWM reverse input
20
21
MUTE
GND
CH3 reverse output terminal
power part power supply
voltage (CH3, 4)
mute terminal
GND
GND
internal Vref voltage input
terminal
power part power supply voltage
(CH1, 2)
22
CH3RIN
CH3PWM reverse input
23
CH3FIN
CH3PWM forward input
24
CH4IN
CH2OUTR
CH2 reverse output terminal
25
CH4CAPA
12
CH2OUTF
CH2 forward output terminal
26
OUTVREF
13
CH1OUTR
CH1 reverse output terminal
27
OPOUT
14
CH1OUTF
CH1 forward output terminal
28
PREVCC
CH4 input terminal
CH4 external CAPA
connection terminal
CH4 external reference
voltage input terminal
operational amplifier output
terminal
pre-stage power supply
voltage
* Polarities for the F output and the R output. For CH4, when PIN24 is High, PIN16 outputs High.
REV. A
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{ CAUTIONS ON USE
(1) Thermal shutdown or mute ON will activate the mute function only on the driver part.
(2) Even though a radiating fin is connected to the GND inside of the package, it must be connected to the
external GND.
(3) About absolute maximum ratings
Exceeding the absolute maximum ratings, such as the applied voltage or the operating temperature
range, may cause permanent device damage. As these cases cannot be limited to the broken short
mode or the open mode, if a special mode where the absolute maximum ratings may be exceeded is
assumed, it is recommended to take mechanical safety measures such as attaching fuses.
(4) About power supply lines
As a measure against the back current regenerated by a counter electromotive force of the motor, a
capacitor to be used as a regenerated-current path can be installed between the power supply and
GND and its capacitance value should be determined after careful check that any problems, for
example, a leak capacitance of the electrolytic capacitor at low temperature, are not found in various
characteristics.
(5) About GND potential
The electric potential of the GND terminal must be kept lowest in the circuitry at any operation states.
(6) About thermal design
With consideration of the power dissipation (Pd) under conditions of actual use, a thermal design
provided with an enough margin should be done.
(7) About operations in a strong electric field
When used in a strong electric field, note that a malfunction may occur.
(8) ASO
When using this IC, the output Tr must be set not to exceed the values specified in the absolute
maximum ratings and ASO.
(9) Thermal shutdown circuit
This IC incorporates a thermal shutdown circuit (TSD circuit). When the chip temperature reaches the
value shown below, the coil output to the motor will be set to open.
The thermal shutdown circuit is designed only to shut off the IC from a thermal runaway and not
intended to protect or guarantee the entire IC functions.
Therefore, users cannot assume that the TSD circuit once activated can be used continuously in the
subsequent operations.
TSD ON Temperature
[°C] (typ.)
180
Hysteresis Temperature
[°C] (typ.)
20
(10) About earth wiring patterns
When a small signal GND and a large current GND are provided, it is recommended that the large
current GND pattern and the small signal GND pattern should be separated and grounded at a single
point of the reference point of the set in order to prevent the voltage of the small signal GND from being
affected by a voltage change caused by the resistance of the pattern wiring and the large current.
Make sure that the GND wiring patterns of the external components will not change, too.
(11) This IC is a monolithic IC which has a P+ isolations and P substrate to isolate elements each other.
This P layer and an N layer in each element form a PN junction to construct various parasitic elements.
Due to the IC structure, the parasitic elements are inevitably created by the potential relationship.
Activation of the parasitic elements can cause interference between circuits and may result in a
malfunction or, consequently, a fatal damage. Therefore, make sure that the IC must not be used
under conditions that may activate the parasitic elements, for example, applying the lower voltage than
the ground level (GND, P substrate) to the input terminals.
Note that, while not applying the power supply voltage to the IC, any voltage must not be applied to the
input terminals. In addition, do not apply the voltage to input terminals without applying the power
supply voltage to the IC. Also while applying the power supply voltage, each input terminal must be
the power supply voltage or less; or within the guaranteed values in the electric characteristics.
REV. A
Appendix
Notes
No technical content pages of this document may be reproduced in any form or transmitted by any
means without prior permission of ROHM CO.,LTD.
The contents described herein are subject to change without notice. The specifications for the
product described in this document are for reference only. Upon actual use, therefore, please request
that specifications to be separately delivered.
Application circuit diagrams and circuit constants contained herein are shown as examples of standard
use and operation. Please pay careful attention to the peripheral conditions when designing circuits
and deciding upon circuit constants in the set.
Any data, including, but not limited to application circuit diagrams information, described herein
are intended only as illustrations of such devices and not as the specifications for such devices. ROHM
CO.,LTD. disclaims any warranty that any use of such devices shall be free from infringement of any
third party's intellectual property rights or other proprietary rights, and further, assumes no liability of
whatsoever nature in the event of any such infringement, or arising from or connected with or related
to the use of such devices.
Upon the sale of any such devices, other than for buyer's right to use such devices itself, resell or
otherwise dispose of the same, no express or implied right or license to practice or commercially
exploit any intellectual property rights or other proprietary rights owned or controlled by
ROHM CO., LTD. is granted to any such buyer.
Products listed in this document are no antiradiation design.
The products listed in this document are designed to be used with ordinary electronic equipment or devices
(such as audio visual equipment, office-automation equipment, communications devices, electrical
appliances and electronic toys).
Should you intend to use these products with equipment or devices which require an extremely high level
of reliability and the malfunction of which would directly endanger human life (such as medical
instruments, transportation equipment, aerospace machinery, nuclear-reactor controllers, fuel controllers
and other safety devices), please be sure to consult with our sales representative in advance.
It is our top priority to supply products with the utmost quality and reliability. However, there is always a chance
of failure due to unexpected factors. Therefore, please take into account the derating characteristics and allow
for sufficient safety features, such as extra margin, anti-flammability, and fail-safe measures when designing in
order to prevent possible accidents that may result in bodily harm or fire caused by component failure. ROHM
cannot be held responsible for any damages arising from the use of the products under conditions out of the
range of the specifications or due to non-compliance with the NOTES specified in this catalog.
Thank you for your accessing to ROHM product informations.
More detail product informations and catalogs are available, please contact your nearest sales office.
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Appendix1-Rev2.0