19-4806; Rev 1; 4/10
KIT
ATION
EVALU
BLE
AVAILA
Mono 2W Class D Amplifier
General Description
Features
o
Industry-Leading Quiescent Current: 1.6mA at 5V,
1.2mA at 3.6V
o
Spread Spectrum and Active Emissions Limiting
o
Passes EMI Limit Unfiltered with Up to 24in
(61cm) of Speaker Cable
o
Click-and-Pop Suppression
o
Thermal and Overcurrent Protection
o
Low 0.5µA Current Shutdown Mode
o
Space-Saving, 2mm x 2mm x 0.8mm, 8-Pin TDFN
Package
MAX9830
The MAX9830 mono 2W Class D amplifier provides
Class AB audio performance with Class D efficiency.
Active emissions limiting edge rate and overshoot con-
trol circuitry greatly reduces EMI. A patented filterless
spread-spectrum modulation scheme eliminates the
need for output filtering found in traditional Class D
devices. These features reduce application component
count.
The MAX9830’s industry-leading 1.6mA at 5V, 1.2mA at
3.6V, quiescent current extends battery life in portable
applications.
The MAX9830 is available in an 8-pin TDFN (2mm x
2mm x 0.8mm) and is specified over the extended
-40°C to +85°C temperature range.
Applications
Notebook and Netbook Computers
Cellular Phones
MP3 Players
Portable Audio Players
VoIP Phones
PART
MAX9830AETA+
Ordering Information
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
8 TDFN-EP*
+Denotes
a lead(Pb)-free/RoHS-compliant package.
*EP
= Exposed pad.
Pin Configuration
TOP VIEW
PVDD OUT+ OUT- PGND
8
7
6
5
Typical Operating Circuit
+2.6V TO +5.5V
0.47µF
IN+
PVDD
0.1µF
IN-
MAX9830
*EP
1
IN+
2
IN-
3
4
0.47µF
MAX9830
OUT+
+
SHDN
OUT-
N.C.
PGND
SHDN N.C.
TDFN
2mm x 2mm x 0.8mm
*EP = EXPOSED PAD. CONNECT THE EP TO
PGND TO ENHANCE THERMAL DISSIPATION.
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Mono 2W Class D Amplifier
MAX9830
ABSOLUTE MAXIMUM RATINGS
Voltage
PVDD, IN+, IN-,
SHDN,
to PGND .........................-0.3V to +6V
OUT+, OUT- to PGND...........................-0.3V to V
PVDD
+ 0.3V
Current
Continuous Current Into/Out of PVDD, PGND,
OUT+, OUT- ..............................................................±600mA
Continuous Input Current (all other pins) .....................±20mA
Duration of Short Circuit Between
OUT+, OUT-, and PVDD, PGND ............................Continuous
Continuous Power Dissipation for a Multilayer Board
(T
A
= +70°C)
8-Pin TDFN-EP (derate 11.9mW/°C) .........................953.5mW
Junction Temperature ......................................................+150°C
Operating Temperature Range ...........................-40°C to +85°C
Storage Temperature Range .............................-65°C to +150°C
Lead Temperature (soldering, 10s) .................................+300°C
Soldering Temperature (reflow) .......................................+260°C
Rate of Voltage Rise at PVDD .............................................1V/µs
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(V
PVDD
= V
SHDN
= 5V, V
PGND
= 0V, R
L
=
∞,
unless otherwise specified. R
L
connected between OUT+ and OUT-, AC measurement
bandwidth 20Hz to 22kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
SPEAKER AMPLIFIER
Voltage Range
Quiescent Supply Current
Shutdown Supply Current
Turn-On Time
Bias Voltage
Maximum AC Input Voltage
Input Resistance in Shutdown
Input Resistance
Voltage Gain
Common-Mode Rejection Ratio
Power-Supply Rejection Ratio
PVDD
I
DD
I
SHDN
t
ON
V
BIAS
V
IN
R
INSD
R
IN
A
V
CMRR
PSRR
f
IN
= 1kHz, input referred
V
PVDD
= 2.6V to 5.5V, T
A
= +25°C
PVDD
RIPPLE
=
200mV
P-P
(Note 3)
THD+N = 10%,
f
IN
= 1kHz
f
IN
= 1kHz
T
A
= +25°C
Peak voltage,
A-weighted, 32
samples/sec
(Notes 3, 4)
Into shutdown
Out of shutdown
f
RIPPLE
= 217Hz
f
RIPPLE
= 20kHz
R
L
= 8Ω
R
L
= 4Ω
R
L
= 8Ω, P
OUT
=
0.5W
R
L
= 4Ω, P
OUT
= 1W
Output Offset Voltage
V
OS
54
Single ended
Differential
Between inputs
From inputs to PGND
12
Inferred from PSRR test
V
PVDD
= 5.0V
V
PVDD
= 3.6V
V
SHDN
= 0V, T
A
= +25°C
2.6
1.6
1.2
0.5
1.9
1.31
1
2
85.6
43
20
12
48
64.3
72
64
1.5
2.25
0.04
0.04
±3
-56
dBV
-56
±30
mV
W
dB
10
4
5.5
2.5
V
mA
µA
ms
V
V
RMS
kΩ
kΩ
dB
dB
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
Output Power
Total Harmonic Distortion Plus
Noise
P
OUT
THD+N
%
Click-and-Pop Level
K
CP
2
_______________________________________________________________________________________
Mono 2W Class D Amplifier
ELECTRICAL CHARACTERISTICS (continued)
(V
PVDD
= V
SHDN
= 5V, V
PGND
= 0V, R
L
=
∞,
unless otherwise specified. R
L
connected between OUT+ and OUT-, AC measurement
bandwidth 20Hz to 22kHz, T
A
= T
MIN
to T
MAX
, unless otherwise noted. Typical values are at T
A
= +25°C.) (Notes 1, 2)
PARAMETER
Oscillator Frequency
Spread-Spectrum Bandwidth
Noise
Signal-to-Noise Ratio
Output Current Limit
Thermal Shutdown Level
Thermal Shutdown Hysterysis
Efficiency
DIGITAL INPUT (SHDN)
Input Voltage High
Input Voltage Low
Input Leakage Current
V
IH
V
IL
T
A
= +25°C
1.4
0.4
±10
V
V
µA
η
R
L
= 8Ω, P
OUT
= 1.5W
V
N
SNR
I
LIM
A-weighted (Note 3)
P
OUT
= P
OUT
at 1% THD+N, A-weighted
R
L
= 8Ω
T
A
= +25°C
SYMBOL
f
OSC
CONDITIONS
MIN
TYP
600
±10
39
98
3
+180
30
85
MAX
UNITS
kHz
kHz
µV
RMS
dB
A
°C
°C
%
MAX9830
Note 1:
All devices are 100% production tested at T
A
= +25°C. All temperature limits are guaranteed by design.
Note 2:
Testing performed with a resistive load in series with an inductor to simulate an actual speaker load. For R
L
= 4Ω, L = 33µH.
For R
L
= 8Ω, L = 68µH.
Note 3:
Amplifier inputs AC-coupled to PGND with C
IN
= 0.47µF.
Note 4:
Specified at room temperature with an 8Ω resistive load in series with a 68µH inductive load connected across BTL outputs.
Mode transitions are controlled by
SHDN.
_______________________________________________________________________________________
3
Mono 2W Class D Amplifier
MAX9830
Typical Operating Characteristics
(V
PVDD
= V
SHDN
= 5.0V, V
PGND
= 0V, R
L
=
∞,
unless otherwise specified. R
L
connected between OUT+ and OUT-, AC measure-
ment bandwidth 20Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9830 toc01
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9830 toc02
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
V
PVDD
= 5.0V
R
LOAD
= 8I
MAX9830 toc03
10
V
PVDD
= 5.0V
R
LOAD
= 4I
10
V
PVDD
= 3.6V
R
LOAD
= 4I
10
1
THD+N (%)
THD+N (%)
P
OUT
= 400mW
1
THD+N (%)
P
OUT
= 100mW
1
P
OUT
= 100mW
0.1
0.1
0.1
P
OUT
= 1.4W
0.01
10
100
1k
FREQUENCY (Hz)
10k
100k
0.01
10
100
P
OUT
= 600mW
0.01
1k
FREQUENCY (Hz)
10k
100k
10
100
P
OUT
= 1W
1k
FREQUENCY (Hz)
10k
100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9830 toc04
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9830 toc05
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
V
PVDD
= 3.6V
R
LOAD
= 4I
MAX9830 toc06
10
V
PVDD
= 3.6V
R
LOAD
= 8I
10
V
PVDD
= 5.0V
R
LOAD
= 4I
10
1
THD+N (%)
THD+N (%)
P
OUT
= 100mW
1
f = 6kHz
THD+N (%)
f = 1kHz
1
f = 1kHz
f = 6kHz
0.1
0.1
0.1
P
OUT
= 500mW
0.01
10
100
1k
FREQUENCY (Hz)
10k
100k
0.01
0
0.5
f = 100Hz
0.01
1.0
1.5
2.0
2.5
3.0
0
0.2
f = 100Hz
0.4
0.6
0.8
1.0
1.2
1.4
OUTPUT POWER (W)
OUTPUT POWER (W)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9830 toc07
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9830 toc08
OUTPUT POWER vs. LOAD RESISTANCE
V
PVDD
= 5.0V
2.0
OUTPUT POWER (W)
MAX9830 toc09
10
V
PVDD
= 5.0V
R
LOAD
= 8I
10
V
PVDD
= 3.6V
R
LOAD
= 8I
2.5
1
THD+N (%)
THD+N (%)
f = 6kHz
f = 1kHz
1
f = 6kHz
0.1
f = 1kHz
1.5
THD+N = 10%
1.0
0.1
0.5
f = 100Hz
0.01
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8
OUTPUT POWER (W)
0.01
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9
OUTPUT POWER (W)
f = 100Hz
0
1
THD+N = 1%
10
LOAD RESISTANCE (
I
)
100
4
_______________________________________________________________________________________
Mono 2W Class D Amplifier
Typical Operating Characteristics (continued)
(V
PVDD
= V
SHDN
= 5.0V, V
PGND
= 0V, R
L
=
∞,
unless otherwise specified. R
L
connected between OUT+ and OUT-, AC measure-
ment bandwidth 20Hz to 22kHz, T
A
= +25°C, unless otherwise noted.)
OUTPUT POWER vs. LOAD RESISTANCE
MAX9830 toc10
MAX9830
OUTPUT POWER vs. SUPPLY VOLTAGE
MAX9830 toc10a
OUTPUT POWER vs. SUPPLY VOLTAGE
f
IN
= 1kHz
R
L
= 4
I
MAX9830 toc10b
1.2
1.0
OUTPUT POWER (W)
0.8
V
PVDD
= 3.6V
2.0
1.8
1.6
OUTPUT POWER (W)
1.4
1.2
1.0
0.8
0.6
0.4
0.2
f
IN
= 1kHz
R
L
= 8
I
3.0
2.5
OUTPUT POWER (W)
2.0
1.5
1.0
0.5
0
THD+N = 10%
0.6
0.4
0.2
0
1
10
LOAD RESISTANCE (
I
)
100
THD+N = 1%
10% THD+N
10% THD+N
1% THD+N
1% THD+N
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
2.5
3.0
3.5
4.0
4.5
5.0
5.5
SUPPLY VOLTAGE (V)
EFFICIENCY vs. OUTPUT POWER
MAX9830 toc11
EFFICIENCY vs. OUTPUT POWER
MAX9830 toc12
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
-10
-20
-30
V
RIPPLE
= 200mV
P-P
MAX9830 toc13
100
V
PVDD
= 5.0V
80
EFFICIENCY (%)
R
LOAD
= 8I
100
V
PVDD
= 3.6V
80
EFFICIENCY (%)
R
LOAD
= 8I
0
R
LOAD
= 4I
R
LOAD
= 4I
40
PSRR (dB)
60
60
-40
-50
-60
-70
40
20
20
-80
-90
0
0
0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0
OUTPUT POWER (W)
0
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1.0
OUTPUT POWER (W)
-100
10
100
1k
FREQUENCY (Hz)
10k
100k
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
INPUT REFERRED
-10
-20
CMRR (dB)
-30
-40
-50
-60
10
100
1k
FREQUENCY (Hz)
10k
100k
MAX9830 toc14
AMPLITUDE vs. FREQUENCY
MAX9830 toc15
STARTUP WAVEFORM
MAX9830 toc16
0
14
12
10
8
6
4
2
0
10
100
1k
FREQUENCY (Hz)
10k
SHDN
2V/div
AMPLITUDE (dB)
OUTPUT
500mA/div
100k
400Fs/div
_______________________________________________________________________________________
5
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