MAX9737ETG+T Fast Delivery |IC PHOENIX CO.,LIMITED

MAX9737ETG+T ,Mono 7W Class D AmplifierApplicationsOrdering Information2.1 Notebook PCs PART TEMP RANGE PIN-PACKAGELCD/PDP/CRT MonitorsMAX ..
MAX973CSA ,Ultra-Low-Power / Open-Drain / Single/Dual-Supply ComparatorsMAX971–MAX974/MAX981–MAX98419-0450; Rev 0; 11/95Ultra-Low-Power, Open-Drain,Single/Dual-Supply Comp ..
MAX973CSA ,Ultra-Low-Power / Open-Drain / Single/Dual-Supply ComparatorsMAX971–MAX974/MAX981–MAX98419-0450; Rev 0; 11/95Ultra-Low-Power, Open-Drain,Single/Dual-Supply Comp ..
MAX973CSA ,Ultra-Low-Power / Open-Drain / Single/Dual-Supply ComparatorsApplicationsfor adding hysteresis without feedback or complicatedBattery-Powered Systems Level Tran ..
MAX973CSA ,Ultra-Low-Power / Open-Drain / Single/Dual-Supply ComparatorsFeaturesThe MAX971–MAX974 and MAX981–MAX984 single/' µMAX Package—Smallest 8-Pin SOdual/quad low-vo ..
MAX973CSA+ ,Ultra-Low-Power, Open-Drain, Single/Dual-Supply ComparatorsELECTRICAL CHARACTERISTICS—5V OPERATION(V+ = 5V, V- = GND = 0V, T = T to T , unless otherwise noted ..
MB89475 ,F2MC-8L/Low Power/Low Voltage Microcontrollersapplications forconsumer product.2* : F MC stands for FUJITSU Flexible Microcontroller.n
MB89535A ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFEATURES• Wide range of package options• Two types of QFP packages (1 mm pitch, 0.65 mm pitch) • LQ ..
MB89535A ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFUJITSU SEMICONDUCTORDS07-12547-4EDATA SHEET8-bit Original Microcontroller CMOS2F MC-8L MB89530A Se ..
MB89537A , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89537A , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series
MB89537AC , 8-bit Original Microcontroller CMOS, F-2MC-8L MB89530A Series

MAX9737ETG+T
Mono 7W Class D Amplifier
General Description
The MAX9737 mono 7W Class D amplifier provides a
high-performance, thermally efficient amplifier solution
that offers up to 88% efficiency at a 12V supply. The
device operates from 8V to 28V and provides a high 80dB
PSRR, eliminating the need for a regulated power supply.
Filterless modulation allows the MAX9737 to pass CE
EMI limits with 1m cables using only a low-cost ferrite
bead and small-value capacitor on each output.
Comprehensive click-and-pop suppression circuitry
reduces noise on power-up/down or into and out of
shutdown or mute.
An input op amp allows the user to create a lowpass or
highpass filter, and select an optimal gain. The internal
precharge circuit ensures clickless/popless turn-on
within 10ms.
The MAX9737 is available in the 24-pin, TQFN-EP pack-
age and is specified over the -40°C to +85°C tempera-
ture range.
Applications
2.1 Notebook PCs
LCD/PDP/CRT Monitors
PC Surround Speakers
MP3 Docking Stations
Features8V to 28V Supply Voltage RangeSpread-Spectrum Modulation Enables Low-EMI
Solution Passes EMI Limit with Up to 1m of Speaker CableHigh 80dB PSRRUp to 88% Efficiency Eliminates HeatsinkThermal and Output Current Protection< 1µA Shutdown ModeClick-and-Pop Suppression< 10ms Turn-On TimeSpace-Saving, 4mm x 4mm x 0.8mm, 24-Pin TQFN
Package
MAX9737
Mono 7W Class D Amplifier
19-4327; Rev 0; 10/08
EVALUATION KIT
AVAILABLE
Ordering Information
PARTTEMP RANGEPIN-PACKAGE
MAX9737ETG+-40°C to +85°C24 TQFN-EP*
+Denotes a lead-free/RoHS-compliant package.
*EP = Exposed pad.
MAX9737
AUDIO
INPUT
SHDN
MUTE
8Ω
8V TO 28V
INPUT RESISTORS AND
CAPACITORS SELECT GAIN
AND CUTOFF FREQUENCY
PRECHARGE
Simplified Diagram
Pin Configuration and Typical Application Circuit appear at
end of data sheet.
MAX9737
Mono 7W Class D Amplifier
ABSOLUTE MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
(VPVDD= 12V, VAGND= VPGND= 0, VSHDN= VMUTE= 5V, C1 = 0.1µF, CIN= 0.47µF, C2 = CCOM= CREG= 1µF, RIN= RFB = 20kΩ,= ∞, AC measurement bandwidth 22Hz to 22kHz, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
(Note 3)
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.
PVDD to PGND.......................................................-0.3V to +30V
AGND to PGND.....................................................-0.3V to +0.3V
IN, PRE, PC, COM to AGND.....................-0.3V to (VREG+ 0.3V)
MUTE, SHDNto AGND............................................-0.3V to +6V
REG to AGND...............................................-0.3V to (VS+ 0.3V)to AGND..............................................................-0.3V to +6V
OUT+, OUT- to PGND.............................-0.3V to (PVDD + 0.3V)
C1N to PGND..........................................-0.3V to (PVDD + 0.3V)
C1P to PGND.........................(PVDD - 0.3V) to (VCHOLD+ 0.3V)
CHOLD to PGND.......................................(VC1P- 0.3V) to +36V
OUT+, OUT-, Short Circuit to PGND or PVDD...........Continuous
Thermal Limits (Notes 1, 2)
Continuous Power Dissipation (TA= +70°C)
24-Pin TQFN Single-Layer PCB (derate 20.8mW/°C
above +70°C)........................................................1666.7mWθJA................................................................................48°C/WθJC..................................................................................3°C/W
Continuous Power Dissipation
24-Pin TQFN Multiple-Layer PCB
(derate 27.8mW/°C above +70°C)........................2222.2mWθJA................................................................................36°C/WθJC..................................................................................3°C/W
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
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
AMPLIFIER DC CHARACTERISTICS
Speaker-Supply Voltage RangePVDDInferred from PSRR test828V
Undervoltage LockoutUVLO6.8V
TA = +25°C1520Quiescent Supply CurrentIPVDD25mA
Shutdown Supply CurrentISHDNVSHDN = 0, TA = +25°C110µA
REG VoltageVREG4.04.24.5V
Preregulator VoltageVS4.85V
COM VoltageVCOM1.942.062.16V
INPUT AMPLIFIER CHARACTERISTICS
Capacitive DriveCLNo sustained oscillation30pF
Output SwingSinking ±1mA (Note 4)2.05V
Open-Loop GainAVO88dB
Input Offset VoltageVOSIN to COM±2mV
Input Amplifier Slew Rate2.5V/µs
Input Amplifier Unity-Gain
Bandwidth3.5MHz
Note 1:Thermal performance of this device is highly dependent on PCB layout. See the Applications Informationsection for more detail.
Note 2: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 /thermal-tutorial.
MAX9737
Mono 7W Class D Amplifier
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
OUTPUT AMPLIFIER CHARACTERISTICS
Output Amplifier GainAVPreamplifier gain = 0dB (Note 7)13.113.614.1dB
Output Current Limit34.6A
Output OffsetVOSOUT+ to OUT-, TA = +25°C±2±10mV
VPVDD = 8V to 28V, TA = +25°C6580Power-Supply Rejection RatioPSRRf = 1kHz, 100mVP-P ripple88dB
THD+N = 10%, RL = 8Ω (Note 5)67.4Output PowerPOUTTHD+N = 10%, RL = 4Ω (Note 6)13W
THD + NoiseTHD+NPOUT = 2W, f = 1kHz, RL = 8Ω (Note 5)0.06%
Signal-to-Noise RatioSNRA-weighted, POUT = THD+N at 1%,
fIN = 1kHz97dB
NoiseVNA-weighted (Note 4)100µVRMS
EfficiencyηPOUT = 4W85%
Into shutdown38
Out of shutdown38
Into mute38Click-and-Pop LevelKCP
Peak voltage, 32
samples/second,
A-weighted
(Notes 4, 5, 8)Out of mute38
dBV
Switching Frequency270300330kHz
Spread-Spectrum Bandwidth±4kHz
Thermal-Shutdown Level+160°C
Thermal-Shutdown Hysteresis30°C
Turn-On TimetONFrom shutdown to full operation910ms
DIGITAL INTERFACE (SHDN, MUTE)
Input-Voltage HighVINH2V
Input-Voltage LowVINL0.8V
Input-Voltage Hysteresis50mV
Input Leakage CurrentTA = +25°C±10µA
ELECTRICAL CHARACTERISTICS (continued)
(VPVDD= 12V, VAGND= VPGND= 0, VSHDN= VMUTE= 5V, C1 = 0.1µF, CIN= 0.47µF, C2 = CCOM= CREG= 1µF, RIN= RFB = 20kΩ,= ∞, AC measurement bandwidth 22Hz to 22kHz, TA= TMINto TMAX, unless otherwise noted. Typical values are at TA= +25°C.)
(Note 3)
Note 3:All devices are 100% production tested at TA= +25°C, and all temperature limits are guaranteed by design.
Note 4:Amplifier inputs AC-coupled to GND.
Note 5:8Ωresistive load in series with 68mH inductive load connected across OUT+ and OUT- outputs.
Note 6:4Ωresistive load in series with 33µH inductive load connected across OUT+ and OUT- outputs for VPVDD≤12V.
Note 7:Output amplifier gain is defined as:
Note 8:Mode transition controlled by SHDNand MUTE.×−⎛⎜⎞⎟+−log|()()|
OUTOUT
PRE
MAX9737
Mono 7W Class D Amplifier
Typical Operating Characteristics
(VPVDD= 12V, VGND= VPGND= 0, VSHDN= VMUTE= 5V, RIN= RFB= 20kΩ, unless otherwise noted.)
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9737 toc01
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.1100k
PVDD = 12V,
8Ω LOAD
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. FREQUENCY
MAX9737 toc02
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.1100k
PVDD = 12V,
4Ω LOAD
POUT = 4W
POUT = 2W
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9737 toc03
OUTPUT POWER (W)
THD+N (%)654321
PVDD = 12V,
8Ω LOAD
6kHz1kHz
20Hz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9737 toc04
OUTPUT POWER (W)
THD+N (%)654321
PVDD = 18V,
8Ω LOAD
6kHz1kHz
20Hz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9737 toc05
OUTPUT POWER (W)
THD+N (%)654321
PVDD = 24V,
8Ω LOAD
6kHz
1kHz
20Hz
TOTAL HARMONIC DISTORTION
PLUS NOISE vs. OUTPUT POWER
MAX9737 toc06
OUTPUT POWER (W)
THD+N (%)12108642
PVDD = 12V,
4Ω LOAD
6kHz1kHz
20Hz
EFFICIENCY
vs. TOTAL OUTPUT POWER
MAX9737 toc07
TOTAL OUTPUT POWER (W)
EFFICEINCY (%)
POWER DISSIPATION (W)
EFFICIENCY
PVDD = 12V,
8Ω LOAD
POWER DISSIPATION
EFFICIENCY
vs. TOTAL OUTPUT POWER
MAX9737 toc08
TOTAL OUTPUT POWER (W)
EFFICEINCY (%)
EFFICIENCY
PVDD = 18V,
8Ω LOAD
POWER DISSIPATION
POWER DISSIPATION (W)
3145678EFFICIENCY
vs. TOTAL OUTPUT POWER
MAX9737 toc09
TOTAL OUTPUT POWER (W)
EFFICEINCY (%)
POWER DISSIPATION (W)
PVDD = 24V,
8Ω LOAD
EFFICIENCY
POWER DISSIPATION
MAX9737
Mono 7W Class D Amplifier
EFFICIENCY
vs. TOTAL OUTPUT POWER
MAX9737 toc10
TOTAL OUTPUT POWER (W)
EFFICEINCY (%)
EFFICIENCY
PVDD = 12V,
4Ω LOAD
POWER DISSIPATION
POWER DISSIPATION (W)
TOTAL OUTPUT POWER vs. PVDD
MAX9737 toc11
SUPPLY VOLTAGE (V)
TOTAL OUTPUT POWER (W)
10% THD+N
1% THD+N
8Ω LOAD
f = 1kHz
TOTAL OUTPUT POWER
vs. LOAD RESISTANCE
MAX9737 toc12
LOAD RESISTANCE (Ω)
TOTAL OUTPUT POWER (W)
PVDD = 12V
10% THD+N
1% THD+N51015202530
TOTAL OUTPUT POWER
vs. LOAD RESISTANCE
MAX9737 toc13
LOAD RESISTANCE (Ω)
TOTAL OUTPUT POWER (W)
PVDD = 8V
10% THD+N
1% THD+N
INBAND OUTPUT SPECTRUM
MAX9737 toc14
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dBV)5k10k15k20k
8Ω LOAD
WIDEBAND OUTPUT SPECTRUM
MAX9737 toc15
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dBV)
10M1M
100k100M
8Ω LOAD
SUPPLY CURRENT
vs. PVDD SUPPLY VOLTAGE
MAX9737 toc16
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)
Typical Operating Characteristics (continued)
(VPVDD= 12V, VGND= VPGND= 0, VSHDN= VMUTE= 5V, RIN= RFB= 20kΩ, unless otherwise noted.)
MAX9737
Mono 7W Class D Amplifier
Typical Operating Characteristics (continued)
(VPVDD= 12V, VGND= VPGND= 0, VSHDN= VMUTE= 5V, RIN= RFB= 20kΩ, unless otherwise noted.)
10ms/div
MUTE ON/OFF RESPONSE
MAX9737 toc19
MUTE
1V/div
OUTPUT
5V/div
PSRR
MAX9737 toc20
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-100100k
PVDD = 12V + 100mVP-P
8Ω LOAD
10ms/div
SHDN ON/OFF RESPONSE
SHDN
1V/div
OUTPUT
5V/div
MAX9737 toc1812141618102022242628
SHUTDOWN CURRENT
vs. PVDD SUPPLY VOLTAGE
MAX9737 toc17
PVDD SUPPLY VOLTAGE (V)
SHUTDOWN CURRENT (nA)
Detailed Description
The MAX9737 filterless, mono class D audio power
amplifier offers Class AB audio performance and Class
D efficiency with minimal board space. The device
operates from an 8V to 28V supply range.
The MAX9737 features filterless, spread-spectrum
modulation, externally set gain and a low-power shut-
down mode that reduces supply current to less than
1µA. Comprehensive click-and-pop suppression and
precharge circuitry reduce noise into and out of shut-
down or mute within 10ms.
Spread-Spectrum Modulation
The MAX9737 features a unique spread-spectrum
switching modulation that flattens EMI wideband spec-
tral components, reducing radiated emissions from the
speaker and cables. The switching frequency of the
Class D amplifier varies randomly by ±4kHz 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 MHz, the wide-
band 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.
Efficiency
The high efficiency of a Class D amplifier is due to the
output transistors acting as switches and therefore con-
sume negligible power. Power loss associated with the
Class D output stage is due to the MOSFET I2R losses,
switching losses, and quiescent current.
Although the theoretical best efficiency of a linear
amplifier is 78% at peak output power, under typical
music reproduction levels, the efficiency falls to below
40%. The MAX9737 exhibits > 80% efficiency under the
same conditions (Figure 1).
Shutdown
The MAX9737 features a shutdown mode that reduces
power consumption to less than 1µA (typ), extending
battery life in portable applications. Drive SHDNlow to
place the device in low-power shutdown mode. In shut-
down mode, the outputs are high impedance and the
common-mode voltage at the output decays to zero.
MAX9737
Mono 7W Class D Amplifier
Pin Description
PINNAMEFUNCTION
1, 17, 18PVDDPower Supply. Bypass PVDD to PGND with a 1µF capacitor connected to pin 1 and a 1µF capacitor
connected to pins 17 and 18.CHOLDCharge-Pump Output. Connect a 1µF capacitor to PVDD.
3, 10, 11AGNDAnalog GroundMUTEMute Input. Drive MUTE low to place the device in mute mode.SHDNShutdown Input. Drive SHDN low to place the part in shutdown mode.
6PCInput Capacitor Precharge Connection. Connect between input resistor, RIN, and input coupling
capacitor, CIN.INOp Amp Inverting Input.PREOp Amp Output. PRE is the output of the input operational amplifier.COMInternal 2.0V Bias. Bypass COM to AGND with a 1µF capacitor.REGInternal 4.2V Bias. Bypass REG to AGND with a 1µF capacitor.
13, 14VSInternal 5.0V Bias. Bypass VS to AGND with a 1µF capacitor.C1NCharge-Pump, Flying-Capacitor Negative Terminal. Connect C1N to C1P through a 0.1µF capacitor.C1PCharge-Pump, Flying-Capacitor Positive Terminal. Connect C1P to C1N through a 0.1µF capacitor.
19, 20OUT-Negative Speaker Output
21, 22PGNDPower Ground
23, 24OUT+Positive Speaker OutputEPExposed Pad. Must be externally connected to PGND.

Partno	Mfg	Dc	Qty	Available	Descript
MAX9737ETG+T \|MAX9737ETGT	MAXIM	N/a	20	avai	Mono 7W Class D Amplifier