EUA2011
3-W Mono Filterless Class-D
Audio Power Amplifier
DESCRIPTION
The EUA2011 is a high efficiency, 3W mono class-D audio
power amplifier. A low noise, filterless PWM architecture
eliminates the output filter, reducing external component
count, system cost, and simplifying design.
Operating in a single 5V supply, EUA2011 is capable of
driving 4Ω speaker load at a continuous average output of
3W/10% THD+N or 2W/1% THD+N. The EUA2011 has
high efficiency with speaker load compared to a typical
class AB amplifier. With a 3.6V supply driving an 8Ω
speaker , the efficiency for a 400mW power level is 88%.
In cellular handsets, the earpiece, speaker phone, and
melody ringer can each be driven by the EUA2011. The
gain of EUA2011 is externally configurable which allows
independent gain control from multiple sources by
summing signals from separate sources.
The EUA2011 is available in space-saving WCSP and
TDFN packages.
FEATURES
Unique Modulation Scheme Reduces EMI Emissions
Efficiency at 3.6V With an 8-Ω Speaker:
−
88% at 400 mW
−
80% at 100 mW
Low 2.4-mA Quiescent Current and
0.5-µA Shutdown Current
2.5V to 5.5V Wide Supply Voltage
Shutdown Pin Compatible with 1.8V Logic GPIO
Optimized PWM Output Stage Eliminates
LC Output Filter
Improved PSRR (−72 dB) Eliminates Need for a
Voltage Regulator
Fully Differential Design Reduces RF Rectification
and Eliminates Bypass Capacitor
Improved CMRR Eliminates Two Input
Coupling Capacitors
Internally Generated 250-kHz Switching
Frequency
Integrated Pop and Click Suppression Circuitry
1.5mm
×
1.5mm Wafer Chip Scale Package (WCSP)
and 3mm
×
3mm TDFN-8 package
RoHS compliant and 100% lead(Pb)-free
APPLICATIONS
Typical Application Circuit
Ideal for Wireless or cellular Handsets and PDAs
Figure1.
DS2011 Ver 1.1
Dec. 2007
1
EUA2011
Pin Configurations
Package
Type
Pin Configurations
Package
Type
Pin Configurations
TDFN-8
WCSP-9
Pin Description
PIN
TDFN-8
WCSP-9
I/O
DESCRIPTION
SHUTDOWN
PV
DD
+IN
-IN
V
O-
V
DD
GND
V
O+
NC
1
-
3
4
8
6
7
5
2
C2
B2
A1
C1
A3
B1
A2/B3
C3
-
I
I
I
I
O
I
I
O
Shutdown terminal (active low logic)
Power Supply
Positive differential input
Negative differential input
Negative BTL output
Power supply
High-current ground
Positive BTL output
No internal connection
DS2011 Ver 1.1
Dec. 2007
2
EUA2011
Ordering Information
Order Number
Package Type
Marking
Operating Temperature range
EUA2011JIR1
EUA2011HIR1
TDFN-8
WCSP-9
xxxxx
A2011
xxx
c0
-40 °C to 85°C
-40 °C to 85°C
EUA2011
□ □ □ □
Lead Free Code
1: Lead Free 0: Lead
Packing
R: Tape & Reel
Operating temperature range
I: Industry Standard
Package Type
J: TDFN
H: WCSP
DS2011 Ver 1.1
Dec. 2007
3
EUA2011
Absolute Maximum Ratings
▓
Supply Voltage, V
DD
------------------------------------------------------------------------------------- -0.3 V to 6V
▓
Voltage at Any Input Pin ------------------------------------------------------------------------- -0.3 V to V
DD
+0.3V
Junction Temperature, T
JMAX
--------------------------------------------------------------------------------------- 150°C
Storage Temperature Rang, T
stg
--------------------------------------------------------------------- -65°C to 150°C
ESD Susceptibility
--------------------------------------------------------------------------------------------
2kV
260°C
Lead temperature 1,6 mm (1/16 inch) from case for 10 seconds -----------------------------------------
▓
▓
▓
▓
▓
Thermal Resistance
θ
JA
(TDFN) --------------------------------------------------------------------------------------------------- 47°C/W
θ
JA
(WCSP) -------------------------------------------------------------------------------------------------- 77.5°C/W
Recommended Operating Conditions
Min
Supply voltage, V
DD
High-level input voltage, V
IH
2.5
Max
5.5
Unit
V
SHUTDOWN
SHUTDOWN
Gain
≤
20V/V (26dB)
V
DD
=2.5V,5.5V,CMRR
≤
-49dB
1.3
0
15
0.5
-40
V
DD
0.35
V
DD
-0.8
85
V
V
k
Ω
V
°C
Low-level input voltage, V
IL
Input resistor, R
I
Common mode input voltage range, V
IC
Operating free-air temperature, T
A
Electrical Characteristics T
A
= 25°C
(Unless otherwise noted)
Symbol
V
OS
Parameter
Output offset voltage
(measured differentially)
Power supply rejection ratio
Common mode rejection ratio
Conditions
V
I=
0V,A
V
=2 V/V, V
DD
=2.5V to 5.5V
V
DD
= 2.5V to 5.5V
V
DD
= 2.5V to 5.5V, V
IC
= V
DD
/2 to
0.5V, V
IC
= V
DD
/2 to V
DD
-0.8 V
V
DD
= 5.5V, V
I
= 5.8V
V
DD
= 5.5V, V
I
= -0.3V
V
DD
= 5.5V, no load
EUA2011
Min
Typ
Max.
1
-72
-60
25
-55
-48
100
5
3.5
2.4
2
0.5
700
500
400
>1
200
250
300
300
4.9
Unit
mV
dB
dB
µA
µA
mA
PSRR
CMRR
I
IH
I
IL
I
(Q)
High-level input current
Low-level input current
Quiescent current
V
DD
= 3.6V, no load
V
DD
= 2.5V, no load
V
(
SHUTDOWN
)
=0.35V,
I
(SD)
Shutdown current
Static drain-source on-state
resistance
V
DD
= 2.5V to 5.5V
V
DD
= 2.5V
V
DD
= 3.6V
V
DD
= 5.5V
V
(
SHUTDOWN
)
=0.4V
µA
rDS(on)
mΩ
f
(sw)
Output impedance in
SHUTDOWN
Switching frequency
Resistance from shutdown toGND
kΩ
kHz
kΩ
V
DD
= 2.5V to 5.5V
DS2011 Ver 1.1
Dec. 2007
4
EUA2011
Electrical Characteristics T
A
= 25°C ,Gain= 2V/V,R
L
=8
Ω
(Unless otherwise noted)
EUA2011
Symbol
Parameter
Conditions
Min
Typ Max.
THD+N=10%,
V
DD
= 3.6V
f=1kHz, R
L
=4Ω
Unit
W
V
DD
= 5V
3
1.4
0.65
2.15
1.06
0.49
1.67
0.84
0.39
1.36
0.66
0.30
0.18
0.18
0.17
-60
93
62
µV
RMS
45
-55
11.5
dB
ms
dB
dB
%
W
W
W
V
DD
= 2.5V
V
DD
= 5V
THD+N=1%,
V
DD
= 3.6V
f=1kHz, R
L
=4Ω
P
O
Output power
V
DD
= 2.5V
V
DD
= 5V
THD+N=10%,
V
DD
= 3.6V
f=1kHz, R
L
=8Ω
V
DD
= 2.5V
V
DD
= 5V
THD+N=1%,
V
DD
= 3.6V
f=1kHz, R
L
=8Ω
V
DD
= 2.5V
THD+N
Total harmonic distortion
plus noise
V
DD
= 5V,P
O
=1W,
R
L
=8Ω, f=1kHz
V
DD
= 3.6V,P
O
=0.5W,
R
L
=8Ω, f=1kHz
V
DD
= 2.5V,P
O
=200mW,
R
L
=8Ω, f=1kHz
kSVR
SNR
Supply ripple rejection ratio
Signal-to-noise ratio
V
DD
= 3.6V, Inputs f=217 Hz,
ac-grounded with V
(RIPPLE)
=200mVpp
C
I
= 2
µF
V
DD
= 5V,P
O
=1W,
R
L
=8Ω
V
DD
= 3.6V,
No weighting
f=20Hz to
20kHz,Inputs
ac-grounded with
A weighting
C
I
= 2
µF
V
DD
= 3.6V,
f=217 Hz
V
IC
=1 V
PP
V
DD
= 3.6V
Vn
Output voltage noise
CMRR
Z
I
Common mode rejection
ratio
Start-up time from shutdown
DS2011 Ver 1.1
Dec. 2007
5
