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BA5814FM Datasheet(PDF) 5 Page - Rohm

Part # BA5814FM
Description  Power Driver For Compact Disc Players
Download  6 Pages
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Manufacturer  ROHM [Rohm]
Direct Link  http://www.rohm.com
Logo ROHM - Rohm

BA5814FM Datasheet(HTML) 5 Page - Rohm

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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.)
Hysteresis Temperature
°C] (typ.)
(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.

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