STK4065 查看數據表（PDF） - SANYO -> Panasonic
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STK4065 Datasheet PDF : 9 Pages
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STK4065
In normal applications, since a heat sink is mounted on
the IC, the substrate temperature does not rise up to a
temperature at which the input signal is turned OFF
completely, but is saturated at a certain temperature.
When load short occurs with a heat sink of 4.5°C/W
mounted, the substrate temperature is saturated at
approximately 160°C.
Tj in this state is as high as 170°C, which obviously
exceeds the maximum rating.
As mentioned above, the thermal protector is designed
to prevent the IC from breaking down in a short time
when abnormal temperature rise occurs, but is not
intended to protect the IC from damage for a long time
when abnormal temperature rise occurs.
(3) Others
a) Excessive input
When an excessive input of 1.5 Vrms (f = 1kHz) or
greater is applied to the input pin, the input channel DC
balance of the input monolithic amplifier is disturbed,
the output is cut off, and DC voltage is developed on
the output pins, damaging the speaker. Be careful not
to permit an input of 1.5Vrms (f = 1kHz) or greater to
be applied.
b) Parasitic oscillation
The STK4065 has 2.2Ω, 0.47µF across the VCC line
and the bootstrap pins for phase compensation. This
makes it necessary for the power line to be extended
close to the bootstrap pins for both the inverting ampli-
fier and the non-inverting amplifier. Too long a power
line may cause parasitic oscillation to occur at low
temperatures. If so, connect a capacitor of approxi-
mately 0.1µF across the tip of the power line and GND
to decrease AC impedance of the power line.
c) Inverse application of supply voltage
The STK4065 contains no protector against inverse
application of supply voltage. If there is a possibility
that inverse application of supply voltage may occur,
connect the protector externally.
d) Power switch-OFF mode
Do not connect pin 1 direct to GND, otherwise the IC
may be broken down.
When connecting pin 1 to GND, connect a resistor of
100Ω or greater in series with pin 1 or connect a diode
across pin 10 and pin 1.
No. 2148—4/9
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