NJU8754 Просмотр технического описания (PDF) - Japan Radio Corporation
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NJU8754 Datasheet PDF : 6 Pages
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NJU8754
TYPICAL APPLICATION CIRCUIT
VDD
10µF 0.1µF
2.2µF
IN
10µF
VDD(1)
VSS(10)
IN(2)
COM(3)
MUTE(4)
STBY(5)
OUTP(9)
OUTN(7)
VDDO(8)
VSS(6)
SSOP10
VDD
10µF 0.1µF
2.2µF
IN
10µF
VDD(19)
VSS(16,17)
IN(2)
COM(3)
MUTE(4)
STBY(7)
OUTP(14)
OUTN(12)
VDDO(13)
VSS(9,10)
QFN20
22µH
1µF
22µH
1µF
0.1µF 47µF
VDD
22µH
1µF
22µH
1µF
0.1µF 47µF
VDD
8Ω Speaker
8Ω Speaker
Note 6) De-coupling capacitors must be connected between each power supply pin and GND.
The capacity value should be adjusted on the application circuit and the operation temperature. It may
malfunction if capacity value is small.
Note 7) The power supply for VDDO requires fast driving response performance such as a switching regulator for
better THD.
THD performance becomes worse by ripple if the capacity of De-coupling capacitor is small.
Note 8) The above circuit shows only application example and does not guarantee the any electrical
characteristics. Therefore, please test the circuit carefully to fit your application.
The cutoff frequency of the LC filter influences the quality of sound.
The Q factor of the LC filter must be less than “1”. Otherwise, the operating current increases when the
frequency of input signal is closed to the cutoff frequency.
Note 9) The transition time for MUTE and STBY signals must be less than 100µs. Otherwise, a malfunction
may be occurred.
Note10) (1) – (19) indicates pin number.
-6-
[CAUTION]
The specifications on this databook are only
given for information , without any guarantee
as regards either mistakes or omissions. The
application circuits in this databook are
described only to show representative usages
of the product and not intended for the
guarantee or permission of any right including
the industrial rights.
Ver.2003-03-12
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