MAX9736AETJ/V+ [MAXIM]
Mono/Stereo High-Power Class D Amplifier;
| 型号： | MAX9736AETJ/V+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Mono/Stereo High-Power Class D Amplifier |
| 文件： | 总25页 (文件大小：1898K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
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MAX9736
Mono/Stereo High-Power Class D Amplifier
General Description
Features
● Independently Controlled Dual Paths
● Wide 8V to 28V Supply Voltage Range
The MAX9736A/B/D Class D amplifiers provide high-
performance, thermally efficient amplifier solutions. The
MAX9736A delivers 2 x 15W into 8Ω loads, or 1 x 30W
into a 4Ω load. The MAX9736B/D deliver 2 x 6W into 8Ω
loads or 1 x 12W into a 4Ω load.
● Spread-Spectrum Modulation Enables Low EMI
Solution
● Passes CE EMI Limits with Low-Cost Ferrite
Bead/Capacitor Filter
● Low BOM Cost
● High 67dB PSRR at 1kHz Reduces Supply Cost
● 88% Efficiency Eliminates Heatsink
● Thermal and Output Current Protection
● < 1μA Shutdown Mode
These devices operate from 8V to 28V and provide a high
PSRR, eliminating the need for a regulated power supply.
The MAX9736 offers up to 88% efficiency at 12V supply.
Pin-selectable modulation schemes select between filter-
less modulation and classic PWM modulation. Filterless
modulation allows the MAX9736 to pass CE EMI limits
with 1m cables using only a low-cost ferrite bead and
capacitor on each output. Classic PWM modulation is
optimized for best audio performance when using a full
LC filter.
● Mute Function
● Space-Saving, 32-Pin TQFN Packages, 7mm x 7mm
x 0.8mm (MAX9736A/B), 5mm x 5mm x 0.8mm
(MAX9736D)
A pin-selectable stereo/mono mode allows stereo opera-
tion into 8Ω loads or mono operation into 4Ω loads. In
mono mode, the right input op amp becomes available as
a spare device, allowing flexibility in system design.
Applications
● LCD/PDP/CRT Monitors
● LCD/PDP/CRT TVs
● MP3 Docking Stations
● Notebook PCs
Comprehensive click-and-pop reduction circuitry mini-
mizes noise coming into and out of shutdown or mute.
● PC Speakers
Input op amps allow the user to create summing amplifiers,
lowpass or highpass filters, and select an optimal gain.
● All-in-One PCs
The MAX9736A/B/D are available in 32-pin TQFN packages
and specified over the -40°C to +85°C temperature range.
Ordering Information appears at end of data sheet.
Simplified Diagram
8V TO 28V
8Ω
AUDIO
INPUTS
8Ω
SHDN
MUTE
MAX9736
INPUT RESISTORS AND
CAPACITORS SELECT GAIN
AND CUTOFF FREQUENCY
MONO
19-3108; Rev 4; 11/19
MAX9736
Mono/Stereo High-Power Class D Amplifier
Absolute Maximum Ratings
PVDD to PGND.......................................................-0.3V to +30V
Continuous Power Dissipation (T = +70°C)
A
AGND to PGND.....................................................-0.3V to +0.3V
32-Pin TQFN 5mm x 5mm Multiple Layer PCB
INL, INR, FBL, FBR, COM to AGND........-0.3V to (V
+ 0.3V)
(derate 34.5mW/°C above +70°C).................................2.76W
REG
MUTE, SHDN, MONO, MOD, REGEN to AGND.......-0.3V to +6V
REG to AGND..............................................-0.3V to (VS + 0.3V)
VS to AGND (Note 1)................................................-0.3V to +6V
OUTL+, OUTL-, OUTR+,
θ
θ
................................................................................29°C/W
..................................................................................2°C/W
JA
JC
Continuous Power Dissipation (T = +70°C)
32-Pin TQFN 7mm x 7mm Multiple Layer PCB
A
OUTR-, to PGND................................-0.3V to (PVDD + 0.3V)
C1N to PGND..........................................-0.3V to (PVDD + 0.3V)
(derate 37mW/°C above +70°C)....................................2.96W
θ
θ
................................................................................27°C/W
..................................................................................1°C/W
JA
C1P to PGND..........................(PVDD - 0.3V) to (V
+ 0.3V)
BOOT
JC
BOOT to PGND.............................(V
OUTL+, OUTL-, OUTR+, OUTR-,
Short Circuit to PGND or PVDD.............................Continuous
- 0.3V) to PVDD + 12V
Operating Temperature Range.............................-40°C to +85°C
Storage Temperature Range..............................-65°C to +150°C
Junction Temperature.......................................................+150°C
Lead Temperature (soldering, 10s)...................................+300°C
C1P
Thermal Limits (Notes 2, 3)
Note 1: VS cannot exceed PVDD + 0.3V. See the Power-Supply Sequencing section.
Note 2: Thermal performance of this device is highly dependant on PCB layout. See the Applications Information section for more details.
Note 3: Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer
board. For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
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.
Package Information
32 TQFN-EP (7mm x 7mm)
Package Code
T3277-3
Outline Number
21-0144
32 TQFN-EP (5mm x 5mm)
Package Code
T3255-4
Outline Number
21-0140
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a four-layer board.
For detailed information on package thermal considerations, refer to www.maximintegrated.com/thermal-tutorial.
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Electrical Characteristics
(V
= 20V, V = 5V, V
= V
= 0V, V
= V
= V
= 5V, REGEN = MONO = AGND, C1 = 0.1μF, C2 = 1μF,
PVDD
VS
AGND
PGND
MOD
SHDN
MUTE
R
= 20kΩ and R
= 20kΩ, R = ∞, AC measurement bandwidth 22Hz to 22kHz, T = T
to T
, unless otherwise noted.
MAX
IN_
FB_
L
A
MIN
Typical values are at T = +25°C.) (Notes 4, 5)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
AMPLIFIER DC CHARACTERISTICS
Speaker Supply Voltage Range
PVDD
Inferred from PSRR test
(Notes 1 and 7)
8
28
V
V
V
Preamplifier Supply Voltage
Range
VS
4.5
5.5
Undervoltage Lockout
UVLO
7
T
T
T
T
= +25°C
30
45
50
20
22
10
10
R = ∞, V
= 5V,
A
A
A
A
L
REGEN
I
mA
mA
µA
PVDD
V
= open
VS
= T
to T
MIN
MAX
MAX
Quiescent Supply Current
= +25°C
= T to T
14
1
R = ∞, V
= 0V,
L
REGEN
I
VS
V
= 5V
VS
MIN
I
I
PVDD
VS
Shutdown Supply Current
I
V = 0V
SHDN
SHDN
REG Voltage
V
4.2
4.8
V
V
V
REG
Preregulator Voltage
COM Voltage
VS
Internal regulated 5V, V = 5V
REGEN
V
1.9
2.05
2.2
COM
INPUT AMPLIFIER CHARACTERISTICS
Capacitive Drive
C
30
±2
88
±1
2.5
pF
V
L
Output Swing (Note 6)
Open-Loop Gain
Sinking ±1mA
A
V
V
= V
±500mV, R = 20kΩ to IN_
FB_
dB
VO
FB_
COM
Input Offset Voltage
Input Amplifier Slew Rate
mV
V/µs
OS
Input Amplifier Unity-Gain
Bandwidth
3.5
MHz
AMPLIFIER CHARACTERISTICS
MAX9736A, MAX9736D
MAX9736B
16.5
13.1
3.3
17
13.6
4.6
±2
17.5
14.1
Output Amplifier Gain (Note 8)
A
dB
V
Output Current Limit
Output Offset
A
V
OUT_+ to OUT_-, T = +25°C
±10
mV
OS
A
PVDD = 8V to 28V, T = +25°C
65
80
A
Power-Supply Rejection Ratio
PSRR
dB
f = 1kHz, 100mV
ripple
67
P-P
R = 8Ω
8
L
Stereo
V
= 12V
R = 4Ω
13
PVDD
L
Mono
Stereo
Mono
Stereo
Mono
R = 4Ω
15.5
13.5
27
L
MAX9736A Output Power
(THD+N = 1%)
P
R = 8Ω
L
W
OUT_1%
V
V
= 18V
= 24V
PVDD
R = 4Ω
L
R = 8Ω
13.5
27
L
PVDD
R = 4Ω
L
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Electrical Characteristics (continued)
(V
= 20V, V = 5V, V
= V
= 0V, V
= V
= V
= 5V, REGEN = MONO = AGND, C1 = 0.1μF, C2 = 1μF,
PVDD
VS
AGND
PGND
MOD
SHDN
MUTE
R
= 20kΩ and R
= 20kΩ, R = ∞, AC measurement bandwidth 22Hz to 22kHz, T = T
to T
, unless otherwise noted.
MAX
IN_
FB_
L
A
MIN
Typical values are at T = +25°C.) (Notes 4, 5)
A
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
UNITS
R = 8Ω
6
11
L
Stereo
V
= 12V
R = 4Ω
L
PVDD
Mono
Stereo
Mono
Stereo
Mono
R = 4Ω
12
6
L
MAX9736B Output Power
(THD+N = 1%)
P
R = 8Ω
W
OUT_1%
L
V
V
= 18V
= 24V
PVDD
R = 4Ω
12
6
L
R = 8Ω
L
PVDD
R = 4Ω
12
10
16
19.5
17.5
35
17.5
35
7.5
14
15
7.5
15
7.5
15
8.5
17
5.5
11
L
R = 8Ω
L
Stereo
V
= 12V
R = 4Ω
L
PVDD
Mono
Stereo
Mono
Stereo
Mono
R = 4Ω
L
MAX9736A Output Power
(THD+N = 10%)
P
R = 8Ω
W
OUT_10%
L
V
V
= 18V
= 24V
PVDD
R = 4Ω
L
R = 8Ω
L
PVDD
R = 4Ω
L
R = 8Ω
L
Stereo
V
= 12V
R = 4Ω
L
PVDD
Mono
Stereo
Mono
Stereo
Mono
Stereo
Mono
Stereo
Mono
Stereo
Mono
R = 4Ω
L
MAX9736B Output Power
(THD+N = 10%)
P
R = 8Ω
W
OUT_10%
L
V
V
V
= 18V
= 24V
= 12V
PVDD
PVDD
PVDD
R = 4Ω
L
R = 8Ω
L
R = 4Ω
L
R = 8Ω
L
R = 4Ω
L
R = 8Ω
MAX9736D Output Power
(Thermally Limited)
L
V
= 18V
= 24V
W
PVDD
PVDD
R = 4Ω
L
R = 8Ω
3.5
7
L
V
R = 4Ω
L
MAX9736A, P
PWM modulation mode, R = 8Ω
= 4W, f = 1kHz,
OUT
0.04
L
Total Harmonic Distortion
Plus Noise
THD+N
%
MAX9736B/D, P
PWM modulation mode, R = 8Ω
= 2W, f = 1kHz,
OUT
0.04
96.5
97
L
MAX9736A/D,
P
= 8W, R = 8Ω
OUT
L
Signal-to-Noise Ratio
Noise
SNR
A-weighted
dB
MAX9736B,
= 6W, R = 8Ω
P
OUT
L
MAX9736A/D
MAX9736B
120
100
A-weighted
(Note 9)
V
µV
RMS
N
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Electrical Characteristics (continued)
(V
= 20V, V = 5V, V
= V
= 0V, V
= V
= V
= 5V, REGEN = MONO = AGND, C1 = 0.1μF, C2 = 1μF,
PVDD
VS
AGND
PGND
MOD
SHDN
MUTE
R
= 20kΩ and R
= 20kΩ, R = ∞, AC measurement bandwidth 22Hz to 22kHz, T = T
to T
, unless otherwise noted.
MAX
IN_
FB_
L
A
MIN
Typical values are at T = +25°C.) (Notes 4, 5)
A
PARAMETER
SYMBOL
CONDITIONS
= 1W, f = 1kHz, R = 8Ω
MIN
TYP
MAX
UNITS
dB
Crosstalk
L to R, R to L, P
100
OUT
L
Efficiency
η
P
= 8W, MAX9736A, PVDD = 12V, R = 8Ω
88
%
OUT
L
Peak voltage, 32
samples/second,
A-weighted
Into mute
36
36
Click-and-Pop Level
K
dBV
CP
Out of mute
(Notes 9 and 10)
Switching Frequency
Spread-Spectrum Bandwidth
Thermal Shutdown Level
Thermal Shutdown Hysteresis
Turn-On Time
270
300
±4
330
kHz
kHz
°C
160
30
°C
t
110
ms
ON
DIGITAL INTERFACE
Input Voltage High
V
2
V
V
INH
Input Voltage Low
V
0.8
INL
Input Voltage Hysteresis
Input Leakage Current
50
mV
µA
±10
Note 4: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 5: Stereo mode (MONO = GND) specified with 8Ω resistive load in series with a 68μH inductive load connected across BTL
outputs. Mono mode (MONO = 5V) specified with a 4Ω resistive load in series with a 33μH inductive load connected across
BTL outputs.
Note 6: Output swing is specified with respect to V
.
COM
Note 7: For typical applications, an external 5V supply is not required. Therefore, set REGEN = 5V. If thermal performance is a
concern, set REGEN = 0V and provide an external regulated 5V supply.
Note 8: Output amplifier gain is defined as:
|(V
) − (V
)|
OUT_−
OUT_+
20×log
| V
|
FB_
Note 9: Amplifier inputs AC-coupled to GND.
Note 10: Specified at room temperature with an 8Ω resistive load in series with a 68μH inductive load connected across BTL outputs.
Mode transitions controlled by SHDN control pin.
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Operating Characteristics
PVDD
otherwise noted.)
(MAX9736A, V
= 12V, MOD = high, spread-spectrum modulation mode, V
= V
= 0V, V
= V
= 5V, unless
GND
PGND
SHDN
MUTE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
1
0.1
1
0.1
1
V
= 12V,
PVDD
V
= 12V,
V
= 12V,
PVDD
PVDD
SPREAD SPECTRUM,
8Ω LOAD
FIXED FREQUENCY,
8Ω LOAD
FIXED FREQUENCY,
4Ω LOAD
P
= 5W
P
OUT
= 5W
OUT
P
OUT
= 5W
0.1
0.01
P
OUT
= 3W
P
OUT
= 3W
P
= 3W
OUT
0.01
0.001
0.01
0.001
0.001
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
1k
FREQUENCY (Hz)
10k
100k
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
1
0.1
10
10
V
= 12V,
PVDD
V
= 12V,
V
= 12V,
PVDD
PVDD
SPREAD SPECTRUM,
4Ω LOAD
FIXED FREQUENCY,
8Ω LOAD
SPREAD SPECTRUM,
8Ω LOAD
1
0.1
1
0.1
6kHz
6kHz
1kHz
P
= 5W
OUT
1kHz
P
OUT
= 3W
0.01
0.001
0.01
0.001
0.01
0.001
20Hz
7
20Hz
10
100
1k
FREQUENCY (Hz)
10k
100k
0
1
2
3
4
5
6
7
8
9
10
0
1
2
3
4
5
6
8
9
10
OUTPUT POWER (W)
OUTPUT POWER (W)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
10
1
10
1
10
1
V
= 24V,
V
= 18V,
PVDD
V
= 18V,
PVDD
PVDD
FIXED FREQUENCY,
8Ω LOAD
FIXED FREQUENCY,
8Ω LOAD
SPREAD SPECTRUM,
8Ω LOAD
6kHz
1kHz
6kHz
6kHz
1kHz
0.1
0.1
0.1
20Hz
20Hz
0.01
0.001
0.01
0.001
0.01
0.001
1kHz
20Hz
12
OUTPUT POWER (W)
0
2
4
6
8
10 12 14 16 18 20
0
2
4
6
8
10 12 14 16 18 20
0
4
8
16
OUTPUT POWER (W)
OUTPUT POWER (W)
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Operating Characteristics (continued)
PVDD
otherwise noted.)
(MAX9736A, V
= 12V, MOD = high, spread-spectrum modulation mode, V
= V
= 0V, V
= V
= 5V, unless
GND
PGND
SHDN
MUTE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
10
1
10
1
10
V
= 12V,
V
= 24V,
PVDD
V
= 12V,
PVDD
PVDD
FIXED FREQUENCY,
4Ω LOAD
SPREAD SPECTRUM,
8Ω LOAD
SPREAD SPECTRUM,
4Ω LOAD
1
0.1
6kHz
6kHz
6kHz
1kHz
1kHz
0.1
0.1
20Hz
1kHz
20Hz
12
20Hz
0.01
0.001
0.01
0.001
0.01
0.001
0
2
4
6
8
10 12 14 16 18
0
2
4
6
8
10 12 14 16
0
3
6
9
15
18
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER (W)
EFFICIENCY
vs. TOTAL OUTPUT POWER
EFFICIENCY
vs. TOTAL OUTPUT POWER
MAX9736 toc13
MAX9736 toc14
100
90
80
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
100
90
80
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
V
= 12V,
V
= 12V,
PVDD
PVDD
SPREAD SPECTRUM,
8Ω LOAD
FIXED FREQUENCY,
8Ω LOAD
EFFICIENCY
EFFICIENCY
POWER DISSIPATION
POWER DISSIPATION
0
5
10
15
20
0
2
4
6
8
10 12 14 16 18 20
TOTAL OUTPUT POWER (W)
TOTAL OUTPUT POWER (W)
EFFICIENCY
EFFICIENCY
vs. TOTAL OUTPUT POWER
vs. TOTAL OUTPUT POWER
MAX9736 toc15
MAX9736 toc16
100
90
80
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
100
90
80
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
V
= 18V,
V
= 18V,
PVDD
PVDD
FIXED FREQUENCY,
8Ω LOAD
SPREAD SPECTRUM,
8Ω LOAD
EFFICIENCY
EFFICIENCY
POWER DISSIPATION
POWER DISSIPATION
0
5
10
15
20
25
30
35
0
5
10
15
20
25
30
35
TOTAL OUTPUT POWER (W)
TOTAL OUTPUT POWER (W)
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Operating Characteristics (continued)
PVDD
otherwise noted.)
(MAX9736A, V
= 12V, MOD = high, spread-spectrum modulation mode, V
= V
= 0V, V
= V
= 5V, unless
GND
PGND
SHDN
MUTE
EFFICIENCY
vs. TOTAL OUTPUT POWER
EFFICIENCY
vs. TOTAL OUTPUT POWER
MAX9736 toc18
MAX9736 toc17
100
90
80
70
60
50
40
30
20
10
10
9
8
7
6
5
4
3
2
1
0
100
10
V
= 24V,
V
= 24V,
PVDD
PVDD
90
80
70
60
50
40
30
20
10
0
9
8
7
6
5
4
3
2
1
0
SPREAD SPECTRUM,
8Ω LOAD
FIXED FREQUENCY,
8Ω LOAD
EFFICIENCY
POWER DISSIPATION
EFFICIENCY
POWER DISSIPATION
0
0
5
10
15
20
25
30
0
5
10
15
20
25
30
TOTAL OUTPUT POWER (W)
TOTAL OUTPUT POWER (W)
EFFICIENCY
EFFICIENCY
vs. TOTAL OUTPUT POWER
vs. TOTAL OUTPUT POWER
MAX9736 toc20
MAX9736 toc19
100
90
80
70
60
50
40
30
20
10
0
10
9
8
7
6
5
4
3
2
1
0
100
90
80
70
60
50
40
30
20
10
10
9
8
7
6
5
4
3
2
1
0
V
= 12V,
V
= 12V,
PVDD
PVDD
SPREAD SPECTRUM,
4Ω LOAD
FIXED FREQUENCY,
4Ω LOAD
EFFICIENCY
EFFICIENCY
POWER DISSIPATION
POWER DISSIPATION
0
0
5
10
15
20
0
5
10
15
20
25
30
TOTAL OUTPUT POWER (W)
TOTAL OUTPUT POWER (W)
TOTAL OUTPUT POWER vs. LOAD RESISTANCE
TOTAL OUTPUT POWER vs. LOAD RESISTANCE
TOTAL OUTPUT POWER vs. V
DD
V
= 18V, f = 1kHz, SPREAD SPECTRUM
V
= 12V, f = 1kHz, SPREAD SPECTRUM
LOAD = 8Ω, f = 1kHz
DD
DD
16
14
12
10
8
30
25
20
40
35
30
25
20
15
10
5
10% THD+N
1% THD+N
10% THD+N
15
10
5
10% THD+N
6
4
1% THD+N
1% THD+N
2
0
0
0
5
10
15
20
25
30
5
10
15
20
25
30
5
10
15
20
25
30
LOAD RESISTANCE (Ω)
LOAD RESISTANCE (Ω)
SUPPLY VOLTAGE (V)
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Operating Characteristics (continued)
PVDD
otherwise noted.)
(MAX9736A, V
= 12V, MOD = high, spread-spectrum modulation mode, V
= V
= 0V, V
= V
= 5V, unless
GND
PGND
SHDN
MUTE
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
TOTAL OUTPUT POWER
vs. LOAD RESISTANCE
CROSSTALK vs. FREQUENCY
0
-10
-20
-30
-40
-50
-60
-70
-80
-90
0
40
35
30
25
20
15
10
5
100mV
PVDD RIPPLE,
8Ω LOAD
,
1W OUTPUT,
8Ω LOAD,
SPREAD SPECTRUM
P-P
V
= 24V,
PVDD
SPREAD SPECTRUM
-20
-40
10% THD+N
-60
RIGHT TO LEFT
-80
1% THD+N
-100
-120
LEFT TO RIGHT
10k 100k
0
0
5
10
15
20
25
30
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
1k
LOAD RESISTANCE (Ω)
FREQUENCY (Hz)
INBAND OUTPUT SPECTRUM
INBAND OUTPUT SPECTRUM
WIDEBAND OUTPUT SPECTRUM
0
-20
0
-20
20
0
8Ω LOAD,
FIXED FREQUENCY
8Ω LOAD,
FIXED FREQUENCY
8Ω LOAD,
SPREAD SPECTRUM
-20
-40
-60
-80
-100
-120
-40
-40
-60
-60
-80
-80
-100
-120
-100
-120
0
5
10
FREQUENCY (kHz)
15
20
0
5
10
FREQUENCY (kHz)
15
20
0.1
1
10
100
FREQUENCY (MHz)
WIDEBAND OUTPUT SPECTRUM
SHDN ON-/OFF-RESPONSE
MUTE ON-/OFF-RESPONSE
MAX9736 toc31
MAX9736 toc32
10
0
8Ω LOAD,
SPREAD SPECTRUM
SHDN
MUTE
2V/div
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
2V/div
OUTPUT
5V/div
OUTPUT
5V/div
0.1
1
10
100
40ms/div
40ms/div
FREQUENCY (MHz)
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Operating Characteristics (continued)
PVDD
otherwise noted.)
(MAX9736A, V
= 12V, MOD = high, spread-spectrum modulation mode, V
= V
= 0V, V
= V
= 5V, unless
GND
PGND
SHDN
MUTE
SUPPLY CURRENT
vs. PVDD SUPPLY VOLTAGE
SUPPLY CURRENT
vs. VS SUPPLY VOLTAGE
SUPPLY CURRENT
vs. PVDD SUPPLY VOLTAGE
40
30
20
10
0
15
20
V
V
= 0V,
V
= V
= V
= 3.3V
SHDN
REGEN
V
V
= 0V,
REGEN
MUTE
REGEN
= V
= 3.3V,
MUTE
SHDN
= V
= 3.3V
MUTE
SHDN
VS = 5V
13
11
15
10
5
9
7
5
0
8
13
18
23
28
8
13
18
23
28
4.5
4.7
4.9
5.1
5.3
5.5
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
VS VOLTAGE (V)
SHUTDOWN CURRENT
vs. PVDD SUPPLY VOLTAGE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
3
2
1
1
0.1
V
= 12V,
V
= 12V,
PVDD
PVDD
V
V
= V
= 3.3V
= 0V,
SHDN
REGEN
P
OUT
= 10W
FIXED FREQUENCY,
4Ω LOAD, MONO
SPREAD SPECTRUM,
4W LOAD, MONO
MUTE
P
= 10W
OUT
0.1
1
0
P
OUT
= 6W
P
OUT
= 6W
0.01
0.01
0.001
-1
-2
0.001
8
12
16
20
24
28
10
100
1k
FREQUENCY (Hz)
10k
100k
10
100
1k
FREQUENCY (Hz)
10k
100k
SUPPLY VOLTAGE (V)
TOTAL HARMONIC DISTORTION PLUS NOISE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
vs. OUTPUT POWER (V = 12V,
SPREAD SPECTRUM, 4Ω LOAD, MONO)
DD
10
1
10
1
V
= 12V,
PVDD
FIXED FREQUENCY,
4Ω LOAD, MONO
6kHz
1kHz
6kHz
0.1
0.01
0.1
0.01
1kHz
20Hz
20Hz
0
2
4
6
8
10 12 14 16 18 20
0
2
4
6
8
10 12 14 16 18 20
OUTPUT POWER (W)
OUTPUT POWER (W)
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Operating Characteristics (continued)
PVDD
otherwise noted.)
(MAX9736A, V
= 12V, MOD = high, spread-spectrum modulation mode, V
= V
= 0V, V
= V
= 5V, unless
GND
PGND
SHDN
MUTE
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
10
1
10
1
10
V
= 18V,
V
= 18V,
V
= 24V,
PVDD
PVDD
PVDD
FIXED FREQUENCY,
4Ω LOAD, MONO
SPREAD SPECTRUM,
4Ω LOAD, MONO
FIXED FREQUENCY,
4Ω LOAD, MONO
1
0.1
6kHz
1kHz
6kHz
1kHz
6kHz
1kHz
0.1
0.01
0.1
0.01
20Hz
30
20Hz
30
20Hz
30
0.01
0
5
10
15
20
25
35
0
5
10
15
20
25
35
0
5
10
15
20
25
35
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER (W)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (V = 24V,
SPREAD SPECTRUM, 4Ω LOAD, MONO)
EFFICIENCY
vs. OUTPUT POWER
DD
10
90
80
70
60
50
40
30
20
10
0
V
= 12V
PVDD
1
0.1
V
= 18V
PVDD
6kHz
1kHz
V
= 24V
PVDD
4Ω LOAD, MONO,
1kHz FIXED FREQUENCY
20Hz
30
0.01
0
6
12
18
24
36
0
5
10
15
20
OUTPUT POWER (W)
OUTPUT POWER (W)
OUTPUT POWER vs. V
EFFICIENCY
DD
(LOAD = 4Ω, f = 1kHz, SPREAD SPECTRUM, MONO)
vs. OUTPUT POWER
40
100
90
80
70
60
50
40
30
20
10
0
10% THD+N
35
30
25
20
15
10
5
V
= 12V
PVDD
V
= 18V
PVDD
1% THD+N
V
PVDD
= 24V
4Ω LOAD
f = 1kHz,
SPREAD SPECTRUM, MONO
4Ω LOAD, MONO,
f = 1kHz SPREAD SPECTRUM
0
0
5
10
15
20
8
10 12 14 16 18 20 22 24 26 28
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Operating Characteristics (continued)
PVDD
otherwise noted.)
(MAX9736A, V
= 12V, MOD = high, spread-spectrum modulation mode, V
= V
= 0V, V
= V
= 5V, unless
GND
PGND
SHDN
MUTE
OUTPUT POWER
vs. LOAD RESISTANCE
OUTPUT POWER
vs. LOAD RESISTANCE
OUTPUT POWER
vs. LOAD RESISTANCE
20
18
16
14
12
10
8
40
35
30
25
20
15
10
5
40
V
= 12V, MONO,
PVDD
SPREAD SPECTRUM
V
= 18V, MONO,
V
= 24V, MONO,
PVDD
PVDD
35
30
25
20
15
10
5
SPREAD SPECTRUM
SPREAD SPECTRUM
10% THD+N
10% THD+N
10% THD+N
6
4
1% THD+N
1% THD+N
10
2
1% THD+N
10 15
0
0
0
0
5
15
20
25
30
0
5
20
25
30
0
5
10
15
20
25
30
LOAD RESISTANCE (Ω)
LOAD RESISTANCE (Ω)
LOAD RESISTANCE (Ω)
SUPPLY CURRENT
vs. PVDD SUPPLY VOLTAGE
SUPPLY CURRENT
vs. VS VOLTAGE
SUPPLY CURRENT
vs. PVDD SUPPLY VOLTAGE
20
15
10
20
15
10
5
45
30
15
0
V
V
= 0V,
V
V
= 0V,
REGEN
REGEN
V
= V
= V
= 3.3V, MONO
SHDN
REGEN
MUTE
= V
= 3.3V,
= V
= 3.3V,
MUTE
SHDN
MUTE
SHDN
VS = 5V, MONO
MONO
5
0
0
8
13
18
23
28
4.5 4.6 4.7 4.8 4.9 5.0 5.1 5.2 5.3 5.4 5.5
VS VOLTAGE (V)
13
8
18
23
28
SUPPLY VOLTAGE (V)
SUPPLY VOLTAGE (V)
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Pin Configuration
TOP VIEW
24 23 22 21 20 19 18 17
16
15
OUTR+ 25
OUTR+ 26
VS
REG
14 AGND
27
28
29
30
31
32
PVDD
PGND
PGND
PVDD
OUTL+
OUTL+
MAX9736
AGND
COM
13
12
11 REGEN
EP*
3
10
9
SHDN
MUTE
ꢄ
1
2
4
5
6
7
8
ꢀꢁꢂꢃ
EP* = EXPOSED PAD, CONNECT TO PGND.
Pin Description
PIN
NAME
OUTL-
BOOT
MONO
FBL
FUNCTION
1, 2
Left-Channel Negative Speaker Output
3
Charge-Pump Output. Connect a 1µF charge-pump holding capacitor from BOOT to PVDD.
Mono Select. Set MONO high for mono mode, low for stereo mode.
4
5
Left-Channel Feedback. Connect feedback resistor between FBL and INL to set amplifier gain.
Stereo Left-Channel Inverting Input. In mono mode, INL is the inverting audio input for the mono amplifier.
No Connection. Not internally connected. OK to connect to PGND.
6
7, 8, 17
9
INL
N.C.
MUTE
SHDN
Mute Input. Drive MUTE low to place the device in mute mode.
10
Shutdown Input. Drive SHDN low to place the device in shutdown mode.
Internal Regulator Enable Input. Connect REGEN to SHDN to enable the internal regulator. Drive REGEN
REGEN low to disable the internal regulator, and supply the device with an external 5V supply on VS. See the
11
Power-Supply Sequencing section.
12
13, 14
15
COM
AGND
REG
Internal 2V Bias. Bypass COM to AGND with a 1µF capacitor.
Analog Ground
Internal Regulator Output. Bypass REG to AGND with a 1µF capacitor.
5V Regulator Supply. Bypass VS to AGND with a 1µF capacitor. If REGEN is low, the internal regulator is
disabled, and an external 5V supply must be connected to VS. See the Power-Supply Sequencing section.
16
VS
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Pin Description (continued)
PIN
NAME
FUNCTION
Stereo Right-Channel Inverting Audio Input. In mono mode, INR is the inverting audio input for the
uncommitted preamplifier (see the Mono Configuration section for more details).
18
INR
19
FBR
Right-Channel Feedback. Connect feedback resistor between FBR and INR to set amplifier gain.
Output Modulation Select. Sets the output modulation scheme:
20
MOD
V
V
= Low, classic PWM/fixed-frequency mode
= High, filterless modulation/spread-spectrum mode
MOD
MOD
21
C1N
C1P
Charge-Pump Flying-Capacitor Negative Terminal
Charge-Pump Flying-Capacitor Positive Terminal
Right-Channel Negative Speaker Output
22
23, 24
25, 26
OUTR-
OUTR+
Right-Channel Positive Speaker Output
Power Supply. Bypass each PVDD pin to ground with 0.1µF capacitors. Also, use a single 220µF capacitor
between PVDD and PGND.
27, 30
PVDD
28, 29
31, 32
—
PGND
OUTL+
EP
Power Ground
Left-Channel Positive Speaker Output
Exposed Pad. Must be externally connected to PGND.
click-and-pop protection when switching between output
Detailed Description
schemes the device must enter shutdown mode and be
configured to the new output scheme before the startup
sequence is finished.
The MAX9736A/B/D filterless, stereo Class D audio
power amplifiers offer Class AB performance and Class
D efficiency with minimal board space. The MAX9736A
outputs 2x15W in stereo mode and 30W in mono mode.
The MAX9736B/D output 2x6W in stereo mode and 12W
in mono mode. These devices operate from an 8V to 28V
supply range.
Spread-Spectrum Mode
The MAX9736 features a unique spread-spectrum mode
that flattens the wideband spectral components, improv-
ing EMI radiated by the speaker and cables. The switch-
ing frequency of the Class D amplifier varies randomly
by ±6kHz around the 300kHz center frequency. Instead
of a large amount of spectral energy present at multiples
of the switching frequency, the energy is spread over a
bandwidth that increases with frequency. Above a few
megahertz, the wideband spectrum looks like white
noise for EMI purposes. A proprietary amplifier topology
ensures this white noise does not corrupt the noise floor
in the audio bandwidth. The spread-spectrum mode is
enabled only with filterless modulation.
The MAX9736 features a filterless, spread-spectrum
switching mode (MOD = high) or a classic PWM fixed-
frequency switching mode (MOD = low).
The MAX9736 features externally set gain and a low-
power shutdown mode that reduces supply current to
less than 1μA. Comprehensive click-and-pop circuitry
minimizes noise into and out of shutdown or mute.
Operating Modes
Filterless Modulation/PWM Modulation
The MAX9736 features two output modulation schemes,
filterless modulation (MOD = high) or classic PWM (MOD
= low). Maxim’s unique, filterless modulation scheme
eliminates the LC filter required by traditional Class D
amplifiers, reducing component count, conserving board
space, and reducing system cost. Configure for classic
PWM output when using a full LC filter.
Efficiency
The high efficiency of a Class D amplifier is due to the
switching operation of the output stage transistors. In a
Class D amplifier, the output transistors act as switches
and consume negligible power. Power loss associated
with the Class D output stage is due to the I R loss of the
MOSFET on-resistance, various switching losses, and
quiescent current overhead.
2
Click-and-pop protection does not apply when the output
is switching between modulation schemes. To maintain
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MAX9736
Mono/Stereo High-Power Class D Amplifier
The theoretical best efficiency of a linear amplifier is 78%
at peak output power. Under typical music reproduc-
tion levels, the efficiency falls below 30%, whereas the
MAX9736 exhibits > 80% efficiency under the same con-
ditions (Figure 1).
Mono Configuration
The MAX9736 features a mono mode that allows the right
and left channels to operate in parallel, achieving up to
30W (MAX9736A) of output power. Apply a logic-high to
MONO to enable mono mode. In mono mode, an audio
signal applied to the left channel (INL) is routed to the
H-bridges of both channels. Also in mono mode, the right-
channel preamplifier becomes an uncommitted opera-
tional amplifier, allowing for flexibility in system design.
Connect OUTL+ to OUTR+ and OUTL- to OUTR- using
heavy PCB traces as close as possible to the device.
Driving MONO low (stereo mode) while the outputs are
wired together in mono mode can trigger the short-circuit
or thermal-overload protection or both.
Shutdown
The MAX9736 features a shutdown mode that reduces
power consumption and extends battery life in portable
applications. The shutdown mode reduces supply cur-
rent to 1μA (typ). Drive SHDN high for normal opera-
tion. Drive SHDN low to place the device in low-power
shutdown mode. In shutdown mode, the outputs are high
impedance; and the common-mode voltage at the output
decays to zero. In shutdown mode, connect REGEN low
to minimize current consumption.
Current Limit
When the output current reaches the current limit, 4.6A
(typ), the MAX9736 disables the outputs and initiates
a 450μs startup sequence. The shutdown and startup
sequence is repeated until the output fault is removed.
Properly designed applications do not enter current-limit
mode unless the output is short circuited or connected
incorrectly.
Mute Function
The MAX9736 features a clickless-and-popless mute
mode. When the device is muted, the signal is attenuated
at the speaker and the outputs stop switching. To mute
the MAX9736, drive MUTE low. Hold MUTE low during
system power-up and power-down to ensure that clicks
and pops caused by circuits before the MAX9736 are
suppressed.
Thermal Shutdown
When the die temperature reaches the thermal shutdown
threshold, +160°C (typ), the MAX9736 outputs are dis-
abled. When the die temperature decreases by 30°C,
normal operation resumes. Some causes of thermal shut-
down are excessively low load impedance, poor thermal
contact between the MAX9736‘s exposed pad and the
PCB, elevated ambient temperature, or poor PCB layout
and assembly.
Click-and-Pop Suppression
The MAX9736 features comprehensive click-and-pop
suppression that minimizes audible transients on startup
and shutdown. While in shutdown, the H-bridge is in a
high-impedance state.
EFFICIENCY
vs. TOTAL OUTPUT POWER
100
90
80
40
35
EN55022B LIMIT
70
MAX9736A
30
25
20
15
10
5
60
50
40
30
20
10
0
CLASS AB
10
800
30
100
200
300
400
500
600
700
900
1000
0
5
15
20
FREQUENCY (MHz)
TOTAL OUTPUT POWER (W)
Figure 2. EMI Performance
Figure 1. MAX9736A Efficiency vs. Class AB Efficiency
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Component Selection
Applications Information
Gain-Setting Resistors
Filterless Class D Operation
External feedback resistors set the gain of the MAX9736.
The output stage provides a fixed internal gain in addi-
tion to the externally set input stage gain. For the
MAX9736A/D, the fixed output-stage gain is set at 17dB
(7V/V). For the MAX9736B, the fixed output-stage gain is
set at 13.6dB (4.8V/V). Set overall gain by using resistors
The MAX9736 meets EN55022B EMC radiation limits
with an inexpensive ferrite bead and capacitor filter when
the speaker leads are less than or equal to 1m. Select a
ferrite bead with 100Ω to 600Ω impedance and rated for
at least 2A. The capacitor value varies based on the ferrite
bead chosen and the speaker lead length. See Figure 3
for the correct connections of these components.
R and R (Figure 5) as follows:
F
IN
When evaluating the MAX9736 with a ferrite bead filter
and resistive load, include a series inductor (68μH for
8Ω load and 33μH for 4Ω load) to model the actual loud-
speaker’s behavior. Omitting the series inductor reduces
the efficiency, the THD+N performance, and the output
power of the MAX9736. When evaluating with a load
speaker, no series inductor is required.
R
R
F
MAX9736A : A = −7.1
V / V
V / V
V
IN
R
R
F
MAX9736B : A = −4.8
V
IN
where A is the desired voltage gain. Choose R between
V
F
10kΩ and 50kΩ.
Inductor-Based Output Filters
Some applications use the MAX9736 with a full inductor-/
capacitor-based (LC) output filter. Select the PWM output
mode for best audio performance. See Figure 4 for the
correct connections of these components.
C2
C4
R1
L1
L2
The load impedance of the speaker determines the filter
component selection (see Table 1).
C1
C3
MAX9736
Inductors L1 and L2, and capacitor C1 form the primary
output filter. Capacitors C2 and C3 provide common-mode
filtering to reduce radiated emissions. Capacitors C4 and
C5, plus resistors R1 and R2, form a Zobel at the output.
A Zobel corrects the output loading to compensate for the
rising impedance of the loudspeaker. Without a Zobel the
filter exhibits a peak response near the cutoff frequency.
C5
R2
Figure 4. Output Filter for PWM Mode
R
F
FB_
IN_
C
IN
FB1
R
IN
AUDIO
INPUT
OUT_+
OUT_-
MAX9736
COM
C1
330pF
C2
330pF
FB2
C
COM
MAX9736
FB1 AND FB2 = WURTH 742792040
Figure 3. Ferrite Bead Filter
Figure 5. Setting Gain
Table 1. Suggested Values for LC Filter
R
(Ω)
L1, L2 (µH)
C1 (µF)
0.47
C2, C3 (µF)
0.10
C4, C5 (µF)
0.22
R1, R2 (Ω)
L
4
10
15
33
10
15
33
8
0.15
0.15
0.15
16
0.10
0.10
0.10
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MAX9736
Mono/Stereo High-Power Class D Amplifier
The FB terminal is an op amp output and the IN terminal
is the op amp inverting input, allowing the MAX9736 to be
configured as a summing amplifier, a filter, or an equalizer.
Internal Regulator
The MAX9736 features an internal 5V regulator, VS,
powered from PVDD. Connect REGEN to SHDN so that
the internal 5V regulator is enabled/disabled when the
MAX9736 is enabled/disabled. If an external 5V supply is
available, drive REGEN low and connect external 5V supply
to VS to minimize the power dissipation of the MAX9736.
Input Capacitor
An input capacitor, C , in conjunction with the input
IN
resistor, R , of the MAX9736 forms a highpass filter
IN
that removes the DC bias from an incoming signal. The
AC-coupling capacitor allows the amplifier to automati-
cally bias the signal to an optimum DC level. Assuming
zero-source impedance, the -3dB point of the highpass
filter is given by:
Supply Bypassing,
Layout, and Grounding
Proper layout and grounding are essential for optimum
performance. Use wide traces for the power-supply inputs
and amplifier outputs to minimize losses due to parasitic
trace resistance. Proper grounding improves audio perfor-
mance, minimizes crosstalk between channels, and pre-
vents switching noise from coupling into the audio signal.
Connect PGND and AGND together at a single point on
the PCB. Route all traces that carry switching transients
away from AGND and the traces/components in the audio
signal path.
1
f−3dB
=
2πR C
IN IN
Choose C so that f
is well below the lowest fre-
-3dB
IN
quency of interest. Use capacitors whose dielectrics have
low voltage coefficients. Capacitors with high-voltage
coefficients cause increased distortion close to f
.
-3dB
COM Capacitor
Bypass each PVDD pin with a 0.1μF capacitor to PGND.
Place the bypass capacitors as close as possible to the
MAX9736. Place a 220μF capacitor between PVDD and
PGND. Bypass VS with a 1μF capacitor to AGND.
COM is the output of the internally generated DC bias
voltage. Bypass COM with a 1μF capacitor to AGND.
Power Supplies
The MAX9736 features separate supplies for signal and
power portions of the device, allowing for the optimum
combination of headroom, power dissipation, and noise
immunity. The speaker amplifiers are powered from
PVDD and can range from 8V to 28V. The remainder of
the MAX9736 is powered by VS.
Use wide, low-resistance output traces. Current drawn
from the outputs increases as load impedance decreases.
High-output trace resistance decreases the power deliv-
ered to the load. The MAX9736 TQFN package features
an exposed thermal paddle on its underside. This paddle
lowers the package’s thermal resistance by providing a
heat conduction path from the die to the PCB. Connect
the exposed thermal pad to PGND by using a large pad
and multiple vias to the PGND plane.
Power-Supply Sequencing
During power-up and power-down, VS must not exceed
PVDD. VS greater than PVDD will damage the device.
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Application Circuit for Stereo Output Configuration
8V TO 28V
C
BULK
0.1µF
0.1µF
220µF
C1
0.1µF
C2
1µF
(16V)
1µF
C1N
21
VS
16
C1P
22
PVDD
27, 30
3
BOOT
REG 15
REGULATOR
CHARGE PUMP
1µF
20kΩ
FBL
INL
5
6
20kΩ
31, 32 OUTL+
1, 2 OUTL-
470nF
COM 12
BIAS
POWER
STAGE
1µF
25, 26 OUTR+
23, 24 OUTR-
20kΩ
INR 18
FBR 19
20kΩ
470nF
REGEN 11
10
SHDN
SHUTDOWN
MUTE
9
MUTE
MOD 20
MONO
CONTROL
5V
MAX9736
4
13, 14
AGND
28, 29
7, 8, 17
N.C.
PGND
ꢀꢁꢂꢃꢄ PREAMPLIFIER GAIN SET AT 0dB.
Maxim Integrated
│ 18
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Typical Application Circuit for Single (Mono) Output Configuration
8V TO 28V
C
BULK
0.1µF
0.1µF
220µF
C1
0.1µF
C2
1µF
(16V)
1µF
VS
16
C1P
22
C1N
21
PVDD
27, 30
3
BOOT
REG 15
REGULATOR
CHARGE PUMP
1µF
LPF
FBL
INL
5
6
FBR
31, 32 OUTL+
1, 2 OUTL-
COM 12
BIAS
POWER
STAGE
1µF
HPF
25, 26 OUTR+
23, 24 OUTR-
INR 18
FBR 19
AUDIO
INPUT
FBR
REGEN 11
10
SHDN
SHUTDOWN
MUTE
MAX9736
9
MUTE
CONTROL
5V
MOD 20
MONO
4
13, 14
AGND
28, 29
PGND
7, 8, 17
N.C.
Maxim Integrated
│ 19
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Ordering Information
Chip Information
PROCESS: BiCMOS
STEREO/MONO
PART
PIN-PACKAGE
OUTPUT POWER
2 x 15W/
1 x 30W
32 TQFN-EP*
7mm x 7mm
MAX9736AETJ+
2 x 15W/
1 x 30W
32 TQFN-EP*
7mm x 7mm
MAX9736AETJ/V+
MAX9736BETJ+
MAX9736BETJ/V+
MAX9736DETJ+
2 x 6W/
1 x 12W
32 TQFN-EP*
7mm x 7mm
2 x 6W/
1 x 12W
32 TQFN-EP*
7mm x 7mm
2 x 6W/
1 x 12W
32 TQFN-EP*
5mm x 5mm
Note: All devices are specified over the -40°C to +85°C operating
temperature range.
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
/V denotes an automotive qualified part.
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│ 20
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Package Information
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Maxim Integrated
│ 21
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MAX9736
Mono/Stereo High-Power Class D Amplifier
Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Maxim Integrated
│ 22
www.maximintegrated.com
MAX9736
Mono/Stereo High-Power Class D Amplifier
Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Maxim Integrated
│ 23
www.maximintegrated.com
MAX9736
Mono/Stereo High-Power Class D Amplifier
Package Information (continued)
For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”,
“#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
Maxim Integrated
│ 24
www.maximintegrated.com
MAX9736
Mono/Stereo High-Power Class D Amplifier
Revision History
REVISION
NUMBER
REVISION
DATE
PAGES
DESCRIPTION
CHANGED
0
1/08
Initial release
—
1
12/08
Corrected various errors
1–15, 17–21
Added MAX9736D and automotive parts numbers and updated the Absolute
Maximum Ratings section
1, 2, 3, 4,13, 15,
2
8/09
19, 20, 21
Corrected error in Absolute Maximum Ratings, Pin Description, Typical
Application Circuit for Stereo Output Configuration, and Typical Application
Circuit for Single (Mono) Output Configuration
3
4
9/09
2, 12, 17, 18
11/19
Updated Ordering Information table
20
For pricing, delivery, and ordering information, please visit Maxim Integrated’s online storefront at https://www.maximintegrated.com/en/storefront/storefront.html.
Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses
are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits)
shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.
©
Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc.
2019 Maxim Integrated Products, Inc.
│ 25
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