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Structure
Product Name
:
:
Silicon Monolithic Integrated Circuit
Power Driver For Compact Disc Players
Device Name
:
BA5814FM
Features
:
•
•
•
•
•
5-ch BTL driver
Use of an HSOP-M28 power package can achieve downsizing of the set.
A built-in thermal shutdown circuit is installed.
A wide dynamic range (6.0V(typ.) when Vcc=8V and RL=8Ω)
Incorporate variable regulators for 2 channels. (External PNP Tr. must be
installed.)
{ ABSOLUTE MAXIMUM RATINGS (Ta=25°C)
Parameter
Power Supply Voltage
Power Dissipation
Operating Temperature
Range
Storage Temperature
Range
Symbol
Vcc
Pd
Limits
13.5
2.2*1
Unit
V
W
Topr
-40 to 85
°C
Tstg
-55 to 150
°C
*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.
{ RECOMMENDED OPERATING CONDITIONS (To determine a power supply voltage, the power
dissipation must be taken into consideration.)
Vcc
4.3 to 13.2 V
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
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{ ELECTRIC CHARACTERISTICS
(Ta=25°C, Vcc=8V, PVcc45=5V, BIAS=2.5V, RL=8Ω, unless otherwise noted.)
Parameter
Circuit Current (at no
signal)
<BTL Driver>
Output Offset Voltage
Maximum Output
Amplitude 1
Maximum Output
Amplitude 2
Voltage Gain 1
Voltage Gain 2
Voltage Gain 3
Mute ON Voltage
Mute OFF Voltage
Mute Terminal Input
Current
Bias Terminal Input
Current
<Regulator>
RE_I Terminal
Threshold Voltage
RE_O Terminal Output
Sink Current
RE_I Terminal Bias
Input Current
Symbol
MIN
TYP
MAX
Unit
Condition
ICC
-
20
30
MA
No load applied
VOOF
-50
0
50
MV
VOM1
5.4
6.0
-
V
CH1, 2, 3
VOM2
3.6
4.0
-
V
CH4, 5
GVC1
GVC2
GVC3
VMTON
VMTOFF
9.5
15.5
16.5
2.0
12.0
18.0
18.0
-
14.5
20.5
19.5
0.5
-
dB
dB
dB
V
V
CH1 RIN=10kΩ
CH2 RIN=10kΩ
CH3, 4, 5
IMUTE
-
90
140
µA
VMUTE=5V
IBIAS
-
75
120
µA
VREITH
1.14
1.2
1.26
V
ISIN
10
50
-
mA
IBOP
-
20
300
nA
{ OUTLINE DIMENSIONS, SYMBOLS
(MAX 18.85 include BURR)
Product
Number
(UNIT: mm)
REV. A
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{ APPLICATION CIRCUIT DIAGRAM
T.S.D : (Thermal shutdown)
Resistance unit : [Ω]
{ PIN NUMBERS, PIN NAMES
No.
Pin Name
Description
Power supply voltage terminal
(REG part)
Bias input terminal
CH3 mute control terminal
CH1, 4, 5 mute control terminal
No.
Pin Name
1
RVcc
2
3
4
BIAS
MUTE1
MUTE2
5
15
VO5(+)
Driver CH5 positive output
16
17
18
VO5(-)
VO4(+)
VO4(-)
VIN1
CH1 input terminal
19
GND
6
VIN2
CH2 input terminal
20
PVcc12
7
VIN3
CH3 input terminal
21
PVcc45
Driver CH5 negative output
Driver CH4 positive output
Driver CH4 negative output
Ground terminal (PRE part,
POWER part)
Power supply terminal (CH1,
2 POWER part)
Power supply terminal (CH4,
5 POWER part)
8
VCC
22
VIN4
9
10
VO3(-)
VO3(+)
23
24
VIN5
RGND
11
12
13
14
Note:
Power supply terminal (PRE
part, CH3 POWER part)
Driver CH3 negative output
Driver CH3 positive output
Description
CH4 input terminal
CH5 input terminal
Ground terminal (REG part)
Regulator 1 output feedback
VO2(-)
Driver CH2 negative output
25
RE_I1
terminal
Regulator 1 external Tr base
VO2(+)
Driver CH2 positive output
26
RE_O1
connection terminal
Regulator 2 output feedback
VO1(-)
Driver CH1 negative output
27
RE_I2
terminal
Regulator 2 external Tr base
VO1(+)
Driver CH1 positive output
28
RE_O2
connection terminal
The positive or negative polarity of driver outputs is determined by the input polarity.
(For example, when the voltage on the pin 5 is HIGH, the output voltage on the pin 14 becomes
HIGH.)
REV. A
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{ CAUTIONS ON USE
(1) Setting the voltage on the Mute terminal to open or 0.5V or less will activate a mute function for the
output current.
Under conditions of normal use, the Mute terminal should be pulled-up to 1.5V or above.
(The pin 3 will mute CH3 while the pin 4 will mute CH1, 4, 5.)
(2) On the Bias terminal (pin 2), the applied voltage of 0.7V (Typ.) or less will activate a mute function.
Under conditions of normal use, it should be set to 1.1V or above.
(3) When the power supply voltage drops to 3.7V (Typ.) or less, the internal circuit will turn OFF and, when
recovering to 3.9V (Typ.) or above, the internal circuit will startup.
(4) Thermal shutdown (TSD), a low power supply voltage, or a low bias terminal voltage will activate the
mute functions on all drivers.
While muting, the output voltage of the BTL driver equals to the internal bias voltage (VCC/2).
(5) Because an internal resistance of the driver input part is generated at the rate of +1200ppm/°C (Typ.),
using an external input resistance to control the gain will result in a change of the gain value
corresponding to the temperature.
(6) The regulator output voltage: VREGO will be the value including the RE_I terminal threshold voltage:
VREITH and a variation of the external resistance.
Affected by the RE_I terminal input bias current:: IBOP, VREGO is described as the following, where
the high-precision external resistance must be selected after careful consideration of IBOP.
⎛ R1 ⎞
+ 1⎟ − R1 × I BOP
⎝ R2 ⎠
(As for R1 and R2, refer to the application circuit diagram.)
VREGO=VREITH * ⎜
(7) The capacitor installed between the regulator output and GND also serves as an anti-oscillation
capacitor and therefore, it must show high performance in the temperature characteristics.
(8) The power supply and GND terminals of the regulator (pin 1 and 24) also serve as the power supply
and GND of the internal constant current source and therefore, they must be connected to the external
power supply and GND even when the regulator is not in use.
(9) Even though a radiating fin is connected to the GND inside of the package, it must be connected to the
external GND.
(10) Basically, applying a voltage below the IC sub-potential to any terminals must be avoided.
Due to a counter electromotive force of the load, if the output on each driver has dropped to the IC
sub-potential (GND) or less, an operation margin must be considered and examined.
(11) Short-circuit between output-power supply, output-GND, or output terminals
Short-circuits between output pin-VCC, output pin-GND, or output terminals (load short) must be
avoided. Make sure that the ICs are installed on the board in proper directions.
Mounting the ICs in improper directions may damage them or produce smoke.
(12) 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.
(13) 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.
(14) About GND potential
The electric potential of the GND terminal must be kept lowest in the circuitry at any operation states.
(15) 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.
(16) About operations in a strong electric field
When used in a strong electric field, note that a malfunction may occur.
(17) ASO
When using this IC, the output Tr must be set not to exceed the values specified in the absolute
maximum ratings and ASO.
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(18) 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.)
175
Hysteresis Temperature
[°C] (typ.)
25
(19) 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.
(20) 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