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BA5956FM Datenblatt(PDF) 4 Page - Rohm

Teilenummer BA5956FM
Bauteilbeschribung  Power Driver For DVD Players
Download  6 Pages
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Hersteller  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BA5956FM Datenblatt(HTML) 4 Page - Rohm

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REV. A
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
CH1, 2, 4, and 5.
Under conditions of normal use, the Mute terminal should be pulled-up to 2.0V or above.
(2)
When the power supply voltage drops to 3.5V (Typ.) or less, the mute function will be activated and,
when recovering to 3.7V (Typ.) or above, the circuit will startup again.
(3)
On the Bias terminal (pin 1, 2), the applied voltage of 1.0V (Typ.) or less will activate a mute function.
Under conditions of normal use, it should be set to 1.2V or above.
(4)
Connecting a capacitive load to the OP-AMP output results in a phase margin reduction of the amp and
may cause an oscillation or a peak.
When connecting a capacitive load, a resistance must be
inserted in series between the output and the capacitive load.
And after careful consideration of the
frequency characteristics, the device should be used within the range where no problem is found in
actual use.
(5)
The radiating fin must be connected to the external GND.
(6)
Short-circuit between output pin -VCC (supply fault), output pin-GND (ground fault), or output terminals
(load short) must be avoided.
Placing ICs in wrong orientations may damage the ICs or produce
smoke.
(7)
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.
(8)
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.
(9)
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.
(10) About GND potential
The electric potential of the GND terminal must be kept lowest in the circuitry at any operation states.
(11) 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.
(12) About operations in a strong electric field
When used in a strong electric field, note that a malfunction may occur.
(13) ASO
When using this IC, the output Tr must be set not to exceed the values specified in the absolute
maximum ratings and ASO.
(14) 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.)
Hysteresis Temperature
[
°C] (typ.)
175
25
(15) 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.


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