NAU82039
3.2W Mono Filter-Free Class-D Audio Amplifier
1
Description
The NAU82039 is a mono high efficiency filter-free Class-D audio amplifier with 12dB of fixed gain, which is capable
of driving a 4 load with up to 3.2W output power. This device provides chip enable pin with extremely low standby
current and fast start-up time of 4ms.
The NAU82039 is ideal for the portable applications of battery drive, as it has advanced features like 90dB PSRR at
217Hz, 93% efficiency, ultra low quiescent current (i.e. 1.25mA at 3.6V) and superior EMI performance. It has the
ability to configure the inputs in either single-ended or differential mode.
NAU82039 is available in Miniature WCSP-9 (1.21mm x 1.23mm in 0.4mm pitch) package.
Key Features
Low Quiescent Current:
•
1.25mA at 3.6V
•
1.8mA at 5V
Powerful Mono Class-D Amplifier:
•
•
•
•
3.2W (4 @ 5V, 10% THD+N)
2.54W (4 @ 5V, 1% THD+N)
1.80W (8 @ 5V, 10% THD+N)
1.42W (8 @ 5V, 1% THD+N)
•
1.58 W (4 @ 3.6V, 10% THD+N)
•
1.27 W (4 @ 3.6V, 1% THD+N)
•
0.91 W (8 @ 3.6V, 10% THD+N)
•
0.72 W (8 @ 3.6V, 1% THD+N)
Low Output Noise: 26 µV
RMS
(A –Weighted @3.6V)
90dB PSRR @217Hz
Low Current Shutdown Mode
Click-and Pop Suppression
1.21mm x 1.23mm WLCSP (0.4mm Pitch)
Applications
Smartphones
Tablet PCs
Personal Navigation Devices
NAU82039 Block Diagram
NAU82039 Datasheet Rev 1.0
Page 1 of 18
Aug, 2012
2
Pin out
A
VIP
VSS
VOUTN
B
VDD
VDD
VSS
C
VIN
EN
VOUTP
1
2
3
Part Number
NAU82039VG
Dimension
1.21mm x 1.23mm
Package
9-bump WCSP
(0.4mm pitch)
Package Material
Pb-Free
3
A1
A2
A3
B1
B2
B3
C1
C2
C3
Pin Descriptions
Name
VIP
VSS
VOUTN
VDD
VDD
VSS
VIN
EN
VOUTP
Type
Analog Input
Supply
Analog Output
Supply
Supply
Supply
Analog Input
Digital Input
Analog Output
Functionality
Positive Differential Input
High Current Ground
Negative BTL Output
Power Supply
Power Supply
High Current Ground
Negative Differential Input
Chip Enable (High = Power Up; Low = Power Down)
Positive BTL Output
Pin #
Table 1 NAU82039 Pin description
NAU82039 Datasheet Rev1.0
Page 2 of 18
Aug, 2012
Operating Characteristics
Conditions: EN = VDD = 5V, VSS = 0V, Av = 12dB, Z
L
=
∞,
Bandwidth = 20Hz to 22kHz, T
A
= 25 C
Parameter
Power Delivered
Z
L
= 4 + 33µH
THD + N = 10%
Z
L
= 4 + 33µH
THD + N = 1%
Z
L
= 8 + 68µH
THD + N = 10%
Z
L
= 8 + 68µH
THD + N = 1%
Symbol
V
EN_H
V
EN_L
VDD = 5.0V
VDD = 3.6V
VDD = 5.0V
VDD = 3.6V
VDD = 5.0V
VDD = 3.6V
VDD = 5.0V
VDD = 3.6V
Min
1.3
0.1
150
20
I
LIMIT
R
IN
R
EN
Symbol
A
V
= 12dB
2.0
75
300
Min
Typ
1.20
1.8
0.1
300
93
4
±1
80
83
90
90
Max
0.35
2.0
3.2
1.58
2.54
1.27
1.80
0.91
1.42
0.72
Typ
Max
Symbol
Comments/Conditions
Min
Typ
Max
°
Units
Output Power
P
out
W
Parameter
Chip Enable (EN)
Voltage Enable High
Voltage Enable Low
Input Leakage Current
Thermal and Current Protection
Thermal Shutdown Temperature
Thermal Shutdown Hysteresis
Limiting Current
Single Ended Input Resistance
Resistance (EN pin to GND)
Parameter
Normal Operation
Quiescent Current Consumption
Shut Down Current
Oscillator Frequency
Efficiency
Start Up Time
Output Offset Voltage
Common Mode Rejection Ratio
Click-and-Pop Suppression
Comments/Conditions
VDD = 2.5V to 5.5V
VDD = 2.5V to 5.5V
Units
V
V
µA
C
°
C
A
k
k
Units
mA
mA
µA
kHz
%
ms
mV
dB
dBV
dB
dB
°
Comments/Conditions
VDD = 3.6V
VDD = 5V
EN = 0
WCSP
I
QUI
I
OFF
f
OSC
η
T
start
V
OS
CMRR
f
IN
= 217Hz
1Hz Shutdown (Z
L
=8 )
DC PSRR
AC PSRR
V
RIPPLE
= 0.2Vpp
@217Hz
V
RIPPLE
= 0.2Vpp@1kHz
V
RIPPLE
=
0.2Vpp@10kHz
Power Supply Rejection Ratio
PSRR
84
63
dB
dB
Noise Performance
V
DD
= 3.6V (A-weighted)
V
DD
= 3.6V (unweighted)
Page 3 of 18
26
36
Aug, 2012
µV
RMS
µV
RMS
NAU82039 Datasheet Rev1.0
Absolute Maximum Ratings
Parameter
DC Power Supply
Analog Input Voltage
Digital Input Voltage
Minimum Load Resistance
Continuous Power Dissipation
Continuous Power Dissipation
Storage temperature range
Symbol
VDD
AV
IN
DV
IN
R
L
P
O
P
O
Tst
WCSP,
T=25°C
WCSP,
T=85°C
-55
Condition
VDD-VSS
V
IN
-VSS
DV
IN
-VSS
Min
-0.30
-0.3
-0.3
Max
+6.00
VDD+0.3
VDD+0.3
3.2
530
275
+150
mW
mW
C
°
Units
V
V
V
CAUTION: Do not operate at or near the maximum ratings listed for extended periods of time. Exposure to such conditions may
adversely influence product reliability and result in failures not covered by warranty.
Recommended Operating Conditions
Parameter
DC Power Supply
High-level input
voltage(EN pin)
Low-level input
voltage(EN pin)
Operating Temperature
Symbol
VDD
V
IH
V
IL
T
A
-40
+25
Condition
VDD-VSS
Min
2.50
1.30
0.35
+85
Typical
5.00
Max
5.50
Units
V
V
V
°C
The following setup is used to measure the above parameters
NAU82039 Datasheet Rev1.0
Page 4 of 18
Aug, 2012
4
Typical Operating Characteristics
°
Conditions: EN = V
DD
= 5V, VSS = 0V, Av = 12dB, Bandwidth = 20Hz to 22 kHz, T
A
= 25 C, unless otherwise noted
THD+N vs Frequency
THD+N v Frequency
1
THD+N (%)
0.1
0.01
0.001
0.0001
20
Pout 50mW
Pout 250mW
Pout 1W
THD+N (%)
1
0.1
0.01
0.001
0.0001
Pout 25mW
Pout 125mW
Pout 500mW
Z
L
= 8Ω + 68μH
V
DD
5V
200
2000
Frequency (Hz)
20000
Z
L
= 8Ω + 68μH
VDD 3.6V
20
200
2000
Frequency (Hz)
20000
THD+N Frequency
1
THD+N v Frequency
Pout 100mW
Pout 500mW
Pout 2W
1
THD+N (%)
0.1
0.01
0.001
0.0001
20
THD+N (%)
0.01
Pout 15mW
Pout 75mW
Pout 200mW
0.1
Z
L
=8Ω + 68μH
VDD 2.5V
0.001
200
2000
20000
Frequency (Hz)
20
Z
L
= 4Ω +33μH
VDD 5V
200
2000
frequency (Hz)
20000
NAU82039 Datasheet Rev1.0
Page 5 of 18
Aug, 2012
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