NJU8753 Ver la hoja de datos (PDF) - Japan Radio Corporation
Número de pieza
componentes Descripción
Fabricante
NJU8753
Japan Radio Corporation
NJU8753 Datasheet PDF : 7 Pages
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NJU3857553
TYPICAL APPLICATION CIRCUIT
10µF 0.1µF
VDD
VDD(28)
VSS(27)
10µF 0.1µF
VDD
2.4kΩ
IN
2.2µF
22000pF 10µF
VREG(3)
VSS(5)
IN(26)
COM(25)
4.7Ω 47µH
OUTP(20)
4.7Ω 47uH
OUTN(16)
0.1µF
0.1µF
Piezo Speaker
2µF
LX(8,9)
VDDO(21,22)
VDDO(14,15)
VOUT(10)
22µH(DCR=0.5Ω)
Schottky diode
(IF=1A,VF=0.45V)
VBAT
EN1(24)
EN2(12)
TEST1(1)
TEST2(23)
TEST3(2)
VR(11)
FB(4)
VSS1(6,7)
VSS(17,19)
R1
2MΩ
22µF 0.1µF
R2
330kΩ
10µF 0.1µF
Figure 2. Application Circuit example
Note 5) 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 6) The power supply for VDDO require fast driving response performance such as a switching regulator for
better THD.
THD performance becomes worse by ripple if the capacity of De-coupling capacitors is small.
Note 7) 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 increase when the
frequency of input signal is closed to the cutoff frequency.
Note 8) The transition time for EN1 and EN2 signals must be less than 100µs. Otherwise, a malfunction may
be occurred.
Note 9) (1)-(28) indicates pin number.
Ver.2003-09-26
[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.
-7-
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