NJU8759
Analog Signal Input Monaural
Filter Less 3.0W Class-D Amplifier
■GENERAL
DESCRIPTION
The
NJU8759
is an analog signal input monaural filterless
class-D power amplifier. Operating voltage is 1.8V to 5.5V.
The
NJU8759
is capable of driving 3W at 5V into 4ohms
without external LC low-pass filters. The
NJU8759
incorporates BTL amplifier, which eliminate AC coupling
capacitors. The
NJU8759
features high power-efficiency by
class-D operation, and is suited for security equipment,
portable set with speaker, PC, etc.
■Package
NJU8759WLC1
■
FEATURES
Operating Voltage
Output power
No output filters
Built-in Pop noise reduction(Turn on/Turn off)
Built-in Short Protector, Thermal Shut Down Function, Under
Voltage Lock Out Function
CMOS Technology
Package Outline
WCSP9(1.45mmX1.45mm)
+1.8 to +5.5 V(3.6Ω<=R
L
)
+2.0 to +5.5 V(3.4Ω<=R
L
<3.6Ω)
3.0 W (5 V, 4
Ω)
■Block
Diagram
VDD
UVLO
OSC
VDDO
TSD
INP
OUTP
PWM
INN
STBYB
CTRL_LGC
OUTN
OCP
VSS
VSSO
NJU8759_Ver1.1E
–
1
–
NJU8759
■
ELECTRICAL CHARACTERISTICS
DC CHARACTERISTICS (Ta=25°C, V
+
=3.6V)
PARAMETER
Supply Voltage1
SYMBOL
V
+1
CONDITIONS
VDD=VDDO=V
VSS=VSSO=GND
+
MIN
1.8
TYP
3.6
MAX
5.5
UNIT
V
(3.6Ω<=R
L
)
Supply Voltage2
Operating Current (Standby)
Operating Current
UVLO Detect Voltage
UVLO Hysteresis Voltage
Digital Input Voltage
Pull Down Resistance
Input Impedance
Frequency
Turn On Time
Turn Off Time
Voltage Gain
Output OFF Set Voltage
Turn ON/Turn OFF
V
+2
VDD=VDDO=V
VSS=VSSO=GND
+
2.0
-
-
1.1
-
1.5
0
3.6
-
2.7
1.4
0.05
-
-
100
30
250
16
16
18
-
5.5
1.0
-
1.7
-
VDD
0.3
-
-
395
40
40
18.5
20
V
μA
mA
V
V
V
V
kΩ
kΩ
kHz
ms
ms
dB
mV
(3.4Ω<=R
L
<3.6Ω)
I
ST
I
Q
V
DDDET
V
DDHYS
V
IH
V
IL
R
DWN
R
IN
F
OSC
T
ON
T
OFF
A
V
V
OS
STBYB Terminal
INP, INN Terminal
-
-
100
10
10
17.5
-20
AC CHARACTERISTICS
Ta=25°C, V
+
=3.6V, BW=20Hz-20kHz, R
L
=8Ω, f=1kHz
PARAMETER
Output Power 1
Output Power 2
Output Power Efficiency
THD+N1
THD+N2
Power Supply Rejection Ratio
Common Signal Rejection
Ratio
Output Noise Voltage
SYMBOL
P
O8
P
O4
η
THD+N
THD+N
PSRR
CMRR
V
NO
+
CONDITION
V =5.0V, THD+N=10%
V =5.0V, THD+N=10%, R
L
=4
V =5.0V, THD+N=10%
R
L
=8Ω+33uH
P
o
=0.5W
V =5.0V, P
O
=1.0 W
fin=217Hz,ripple=200mV
p-p
fin=217Hz,Vinc=1Vp-p
A-weighting
+
+
+
MIN
-
-
-
-
-
-
-
-
TYP
1.7
3.0
93
0.05
0.035
-55
-55
62
MAX
-
-
-
-
-
-
-
-
UNIT
W
W
%
%
%
dB
dB
μV
NJU8759_Ver1.1E
–
3
–
NJU8759
●Turn
on/Turn off Sequence
STBYB
Turn-on
OUTP/OUTN
Active
Turn-off
T
ON
T
OFF
When STBYB is set to
“H”
in the T
OFF
, it shifts to Active mode immediately.
●Test
system of the output THD+N
NJU8759
AUX-0025
Filters
20kHz(AES17)
THD METER
Evaluation Board
LPF
Audio Analyzer
■Application
Circuit
V
+
C3=
10μF
C4=
0.1μF
VDD
UVLO
INP
OSC
VDDO
TSD
OUTP
C1=
0.47μF
PWM
C2=
0.47μF
INN
STBYB
OUTN
OCP
CTRL_LGC
STBYB Signal
C5=
H : Active
1nF
L : Stand - By
VSS
VSSO
–
4
–
NJU8759_Ver1.1E
NJU8759
■Package
[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.
NJU8759_Ver1.1E
–
5
–
PCB设计
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