MAX9709ETN+ Fast Delivery |IC PHOENIX CO.,LIMITED

MAX9709ETN+ ,25W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D AmplifierBlock DiagramMAX9709MAX97092 2SYNCOUTSYNCOUTFS1, FS2 FS1, FS2SYNC SYNCRIGHTCHANNELAUDIOCLASS D CLAS ..
MAX970EEE ,Single/Dual/Quad / Micropower / Ultra-Low-Voltage / Rail-to-Rail I/O ComparatorsApplicationsMAX966EUA -40°C to +85°C 8 µMAXMAX967ESA -40°C to +85°C 8 SO_Selector GuideMAX967EUA -4 ..
MAX970EEE ,Single/Dual/Quad / Micropower / Ultra-Low-Voltage / Rail-to-Rail I/O ComparatorsFeaturesThe MAX965–MAX970 single/dual/quad micropower' Ultra-Low Single-Supply Operation down to +1 ..
MAX970EEE+ ,Single/Dual/Quad, Micropower, Ultra-Low-Voltage, Rail-to-Rail I/O ComparatorsELECTRICAL CHARACTERISTICS(V = +1.6V to +5.5V, T = T to T , unless otherwise noted. Typical values ..
MAX970EEE+ ,Single/Dual/Quad, Micropower, Ultra-Low-Voltage, Rail-to-Rail I/O ComparatorsApplications8 µMAX-8MAX967EUA-T -40°C to +85°C U8-1Ordering Information continued on last page.Pin ..
MAX970ESD ,Single/Dual/Quad / Micropower / Ultra-Low-Voltage / Rail-to-Rail I/O ComparatorsMAX965–MAX97019-1226; Rev 0; 4/97Single/Dual/Quad, Micropower,Ultra-Low-Voltage, Rail-to-Rail I/O C ..
MB89185 ,F2MC-8L/Low Power/Low Voltage MicrocontrollersFUJITSU SEMICONDUCTORDS07-12404-2EDATA SHEET8-bit Proprietary MicrocontrollerCMOS2F MC-8L MB89180 S ..
MB89191A ,8-bit Proprietary MicrocontrollerFUJITSU SEMICONDUCTORDS07-12512-7EDATA SHEET8-bit Proprietary MicrocontrollerCMOS2F MC-8L MB89190/1 ..
MB89191A ,8-bit Proprietary MicrocontrollerFUJITSU SEMICONDUCTORDS07-12512-7EDATA SHEET8-bit Proprietary MicrocontrollerCMOS2F MC-8L MB89190/1 ..
MB89191A ,8-bit Proprietary MicrocontrollerFEATURES • Minimum execution time: 0.95 m s at 4.2 MHz (VCC = 2.7 V) 2•F MC-8L family CPU core•Two ..
MB89191PF ,8-bit Proprietary MicrocontrollerFUJITSU SEMICONDUCTORDS07-12512-7EDATA SHEET8-bit Proprietary MicrocontrollerCMOS2F MC-8L MB89190/1 ..
MB89193 ,8-bit Proprietary MicrocontrollerFUJITSU SEMICONDUCTORDS07-12512-7EDATA SHEET8-bit Proprietary MicrocontrollerCMOS2F MC-8L MB89190/1 ..

MAX9709ETN+
25W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier
General Description
The MAX9709 stereo/mono, Class D audio power ampli-fier delivers up to 2 x 25W into an 8Ω stereo mode and 1 x 50W into a 4Ω load in mono mode while offering up to
87% efficiency. The MAX9709 provides Class AB ampli-
fier performance with the benefits of Class D efficiency, eliminating the need for a bulky heatsink and conserving power. The MAX9709 operates from a single +10V to +22V supply, driving the load in a BTL configuration.
The MAX9709 offers two modulation schemes: a fixed-
frequency modulation (FFM) mode, and a spread-spec-
trum modulation (SSM) mode that reduces EMI-radiated
emissions. The MAX9709 can be synchronized to an external clock from 600kHz to 1.2MHz. A synchronized
output allows multiple units to be cascaded in the system.
Features include fully differential inputs, comprehen-sive click-and-pop suppression, and four selectable-gain settings (22dB, 25dB, 29.5dB, and 36dB). A pin-pro-grammable thermal flag provides seven different ther-mal warning thresholds. Short-circuit and thermal-over-load protection prevent the device from being damaged during a fault condition.
The MAX9709 is available in a 56-pin TQFN (8mm x 8mm x 0.8mm) package, and is specified over the extended -40°C to +85°C temperature range.
Applications
Features●2 x 25W Output Power in Stereo Mode (8Ω, THD = 10%)●1 x 50W Output Power in Mono Mode (4Ω, THD = 10%)●High Efficiency: Up to 87%●Filterless Class D Amplifier●Unique Spread-Spectrum Mode●Programmable Gain (+22dB, +25dB, +29.5dB, +36dB)●High PSRR (90dB at 1kHz)●Differential Inputs Suppress Common-Mode Noise●Shutdown and Mute Control●Integrated Click-and-Pop Suppression●Low 0.1% THD+N●Current Limit and Thermal Protection●Programmable Thermal Flag●Clock Synchronization Input and Output●Available in Thermally Efficient, Space-Saving Package: 56-Pin TQFN
Pin Configurations appear at end of data sheet.●LCD TVs●PDP TVs●PC/HiFi Audio Solutions
+Denotes a lead-free package.
**EP = Exposed pad.
PARTTEMP RANGEPIN-PACKAGE
MAX9709ETN+-40°C to +85°C56 TQFN-EP**
CLASS D
MODULATOR
SYNCOUT
TEMP
OUTPUT
PROTECTION
GAIN
CONTROL
FS1, FS2
MAX9709
STEREO MODE
G1, G22
SYNC
RIGHT
CHANNEL
LEFT
CHANNEL
MONO
TH0, TH1,
TH2
CLASS D
MODULATOR
SYNCOUT
TEMP
OUTPUT
PROTECTION
GAIN
CONTROL
FS1, FS2MAX9709
MONO MODE
G1, G22
SYNC
AUDIO
INPUT
VDIGITAL
MONO
TH0, TH1,
TH2
MAX970925W/50W, Filterless, Spread-Spectrum,
Stereo/Mono, Class D Amplifier
Simpliied Block Diagram
Ordering Information
EVALUATION KIT AVAILABLE
PVDD, VDD to PGND, GND ....................................-0.3 to +30VPVDD to VDD ........................................................-0.3V to +0.3VOUTR+, OUTR-, OUTL+, OUTL- to PGND, GND .......................-0.3V to (PVDD + 0.3V)C1N to GND ...........................................-0.3V to (PVDD + 0.3V)C1P to GND ..........................(PVDD - 0.3V) to (CPVDD + 0.3V)CPVDD to GND .......................................(PVDD - 0.3V) to +40VAll Other Pins to GND ...........................................-0.3V to +12VContinuous Input Current (except PVDD, VDD, OUTR+, OUTR-, OUTL+, and OUTL-) .........................................20mA
Continuous Power Dissipation (TA = +70°C) 56-Pin Thin QFN (derate 47.6mW/°C above +70°C) ....3.81WOperating Temperature Range ...........................-40°C to +85°CStorage Temperature Range ............................-65°C to +150°C
Junction Temperature ......................................................+150°CThermal Resistance (θJC) 56-Pin Thin QFN .........................................................0.6°C/WLead Temperature (soldering, 10s) .................................+300°C
(PVDD = VDD = +20V, PGND = GND = 0V, CSS = 0.47µF, CREG = 0.01µF, C1 = 0.1µF, C2 = 1µF, RLOAD = ∞, MONO = low (stereo
mode), SHDN = MUTE = high, G1 = low, G2 = high (AV = 22dB), FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (RL) are connected between OUT_+ and OUT_-, unless otherwise stated. TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Supply Voltage RangeVDDInferred from PSRR test1022V
Shutdown CurrentISHDNSHDN = low0.11µA
Shutdown to Full Operation tSON100ms
Mute to Full OperationtMUTE100ms
Input ImpedanceRIN
G1 = 0, G2 = 15085125G1 = 1, G2 = 1406390
G1 = 1, G2 = 0254360
G1 = 0, G2 = 0122130
Output Pulldown ResistanceSHDN = GND600kΩ
Output Offset Voltage VOSAC-coupled input, measured between OUT_+ and OUT_-3±40mV
Power-Supply Rejection RatioPSRR
PVDD = 10V to 22V6790200mVP-P ripple (Note 2)
fRIPPLE = 1kHz90
fRIPPLE = 20kHz52
Common-Mode Rejection RatioCMRR
DC, input referred4970f = 20Hz to 20kHz, input referred60
Switch On-Resistance RDSOne power switch0.30.6Ω
Switching Frequency fSW
FS1FS2
kHz01802002201 (SSM)20001601250
Oscillator Spread BandwidthFS1 = FS2 = high (SSM)±2%
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Absolute Maximum Ratings
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
(PVDD = VDD = +20V, PGND = GND = 0V, CSS = 0.47µF, CREG = 0.01µF, C1 = 0.1µF, C2 = 1µF, RLOAD = ∞, MONO = low (stereo
mode), SHDN = MUTE = high, G1 = low, G2 = high (AV = 22dB), FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (RL) are connected between OUT_+ and OUT_-, unless otherwise stated. TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
GainAV
G1 = 0, G2 = 121.622.022.3G1 = 1, G2 = 124.925.025.6
G1 = 1, G2 = 029.229.529.9
G1 = 0, G2 = 035.936.036.6
TEMP Flag ThresholdTFLAG
TH2TH1TH000800190101001111000120011291013911
TEMP Flag AccuracyFrom +80°C to +140°C±6°C
TEMP Flag Hysteresis2°C
STEREO MODE (RLOAD = 8Ω, Note 3)
Quiescent Current MUTE = 1, RLOAD = ∞2033mA
MUTE = 06.513
Output PowerPOUTf = 1kHz, THD =
10%, TA = +25°C
PVDD = 20V25PVDD = 22V29
PVDD = 12V, RLOAD = 4Ω15
Total Harmonic Distortion Plus NoiseTHD+Nf = 1kHz, BW = 22Hz to 22kHz,
POUT = 12W0.1%
Signal-to-Noise Ratio SNRPOUT = 10W22Hz to 22kHz91dBA-weighted96
EficiencyηPOUT = 25W + 25W, f = 1kHz87%
Left-Right Channel Gain MatchingRLOAD = ∞0.2%
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Electrical Characteristics (continued)
(PVDD = VDD = +20V, PGND = GND = 0V, CSS = 0.47µF, CREG = 0.01µF, C1 = 0.1µF, C2 = 1µF, RLOAD = ∞, MONO = low (stereo
mode), SHDN = MUTE = high, G1 = low, G2 = high (AV = 22dB), FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (RL) are connected between OUT_+ and OUT_-, unless otherwise stated. TA = TMIN to TMAX, unless otherwise noted. Typical values are at
TA = +25°C.) (Note 1)
Note 1: All devices are 100% production tested at +25°C. All temperature limits are guaranteed by design.
Note 2: Inputs AC-coupled to GND.Note 3: Testing performed with an 8Ω resistive load in series with a 68µH inductive load across the BTL outputs.
Note 4: Minimum output power is guaranteed by pulse testing.
Note 5: Testing performed with an 8Ω resistive load in series with a 68µH inductive load connected across BTL outputs. Mode tran-
sitions are controlled by SHDN.
Note 6: Testing performed with a 4Ω resistive load in series with a 33µH inductive load across the BTL outputs.
PARAMETERSYMBOLCONDITIONSMINTYPMAXUNITS
Output Short-Circuit Current
ThresholdISCRLOAD = 0Ω3A
Click-and-Pop LevelKCPPeak voltage, 32
samples/second, A-weighted (Notes 2, 5)
Into shutdown-63dBV
Out of shutdown-55
MONO MODE (RLOAD = 4Ω, MONO = HIGH) (Note 6)
Quiescent Current MUTE = 1, RLOAD = ∞20mAMUTE = 06.5
Output PowerPOUTf = 1kHz, THD = 10%RLOAD = 8Ω25WRLOAD = 4Ω50
Total Harmonic Distortion Plus NoiseTHD+Nf = 1kHz, BW = 22Hz to 22kHz,
POUT = 22W 0.09%
Signal-to-Noise Ratio SNRPOUT = 10W20Hz to 20kHz91dBA-weighted95
EficiencyηPOUT = 54W, f = 1kHz86%
Output Short-Circuit Current
ThresholdISCRLOAD = 0Ω6A
Click-and-Pop LevelKCPPeak voltage, 32
samples/second, A-weighted (Notes 2, 5)
Into shutdown-60dBV
Out of shutdown-63
DIGITAL INPUTS (SHDN, MUTE, G1, G2, FS1, FS2, TH0, TH1, TH2, SYNCIN, MONO)
Logic-Input Current IIN0 to 12V1µA
Logic-Input High VoltageVIH2.5V
Logic-Input Low VoltageVIL0.8V
OPEN-DRAIN OUTPUTS (TEMP, SYNCOUT)
Open-Drain Output Low VoltageVOLISINK = 3mA0.4V
Leakage CurrentILEAKVPULLUP = 5.5V0.2µA
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Electrical Characteristics (continued)
(PVDD = VDD = +20V, PGND = GND = 0V, CSS = 0.47µF, CREG = 0.01µF, C1 = 0.1µF, C2 = 1µF, RLOAD = 8Ω, SHDN = high, MONO = low, MUTE = high, G1 = low, G2 = high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (RL) are between OUT_+ and OUT_-, TA = +25°C, unless otherwise stated.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (STEREO MODE)
MAX9709 toc02
OUTPUT POWER (W)
THD+N (%)15105
RLOAD = 4Ω
RLOAD = 8Ω
PVDD = 12V
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (STEREO MODE)
MAX9709 toc03
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.1100k
POUT = 12W
EFFICIENCY vs. OUTPUT POWER
(STEREO MODE)
MAX9709 toc04
OUTPUT POWER (W)
EFFICIENCY (%)2015105
OUTPUT POWER vs. SUPPLY VOLTAGE
(STEREO MODE)
MAX9709 toc05
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)201816141224
THD+N = 1%
THD+N = 10%
NO-LOAD SUPPLY CURRENT
vs. SUPPLY VOLTAGE (STEREO MODE)
MAX9709 toc06
SUPPLY VOLTAGE (V)
SUPPLY CURRENT (mA)1816141222
TA = +25°CTA = +85°C
TA = -40°C
SHUTDOWN SUPPLY CURRENT
vs. SUPPLY VOLTAGE
MAX9709 toc07
SUPPLY CURRENT (nA)18121416
SHDN = 0
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (STEREO MODE)
MAX9709 toc01
OUTPUT POWER (W)
THD+N (%)252015105
fIN = 1kHz
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER (MONO MODE)
MAX9709 toc08
THD+N (%)40302010
RLOAD = 4Ω
fIN = 1kHz
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Typical Operating Characteristics
(PVDD = VDD = +20V, PGND = GND = 0V, CSS = 0.47µF, CREG = 0.01µF, C1 = 0.1µF, C2 = 1µF, RLOAD = 8Ω, SHDN = high, MONO = low, MUTE = high, G1 = low, G2 = high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (RL) are between OUT_+ and OUT_-, TA = +25°C, unless otherwise stated.)
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. OUTPUT POWER
MAX9709 toc09
OUTPUT POWER (W)
THD+N (%)15105
PVDD = 12V,
MONO MODE,
fIN = 1kHz
RL = 4Ω
TOTAL HARMONIC DISTORTION PLUS NOISE
vs. FREQUENCY (MONO MODE)
MAX9709 toc10
FREQUENCY (Hz)
THD+N (%)
10k1k100
0.1100k
RLOAD = 4Ω
POUT = 22Ω
WIDEBAND OUTPUT SPECTRUM
(SSM MODE)
MAX9709 toc11
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dBV)
10M1M
100k100M
10kHz RBW
WIDEBAND OUTPUT SPECTRUM
(FFM MODE)
MAX9709 toc12
FREQUENCY (Hz)
OUTPUT AMPLITUDE (dBV)
10M1M100k100M
10kHz RBW
OUTPUT FREQUENCY SPECTRUM
(SSM MODE)
MAX9709 toc13
FREQUENCY (kHz)
OUTPUT AMPLITUDE (dBV)161284
OUTPUT FREQUENCY SPECTRUM
(FFM MODE)
MAX9709 toc14
FREQUENCY (kHz)
OUTPUT AMPLITUDE (dBV)161284
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Typical Operating Characteristics (continued)
(PVDD = VDD = +20V, PGND = GND = 0V, CSS = 0.47µF, CREG = 0.01µF, C1 = 0.1µF, C2 = 1µF, RLOAD = 8Ω, SHDN = high, MONO = low, MUTE = high, G1 = low, G2 = high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (RL) are between OUT_+ and OUT_-, TA = +25°C, unless otherwise stated.)
EFFICIENCY vs. OUTPUT POWER
(MONO MODE)
MAX9709 toc15
OUTPUT POWER (W)
EFFICIENCY (%)40302010
RLOAD = 4Ω
OUTPUT POWER vs. SUPPLY VOLTAGE
(MONO MODE)
MAX9709 toc16
SUPPLY VOLTAGE (V)
OUTPUT POWER (W)201816141224
THD+N = 1%
THD+N = 10%
RLOAD = 4Ω
fIN = 1kHz
OUTPUT POWER vs. LOAD RESISTANCE
(MONO MODE)
MAX9709 toc17
LOAD RESISTANCE (Ω)
OUTPUT POWER (W)8612
THD+N = 10%
fIN = 1kHz
OUTPUT POWER vs. LOAD RESISTANCE
(STEREO MODE)
MAX9709 toc18
LOAD RESISTANCE (Ω)
OUTPUT POWER PER CHANNEL (W)14131211109816
THD+N = 10%
fIN = 1kHz
MUTE RESPONSE
MAX9709 toc19
40ms/div
MUTE
5V/div
OUTPUT
50mV/div
SHUTDOWN RESPONSE
MAX9709 toc20
40ms/div
SHDN
5V/div
OUTPUT
50mV/div
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Typical Operating Characteristics (continued)
(PVDD = VDD = +20V, PGND = GND = 0V, CSS = 0.47µF, CREG = 0.01µF, C1 = 0.1µF, C2 = 1µF, RLOAD = 8Ω, SHDN = high, MONO = low, MUTE = high, G1 = low, G2 = high, FS1 = FS2 = high (SSM), SYNCIN = low. All load resistors (RL) are between OUT_+ and OUT_-, TA = +25°C, unless otherwise stated.)
PINNAMEFUNCTION
1, 12, 42, 43, 44, 55, 56N.C.No Connection. Not internally connected.
2, 3, 4, 39, 40,
41, 49, 50PGNDPower Ground
5, 6, 7, PVDDPositive Power Supply. Bypass to PGND with a 0.1µF and a 47µF capacitor with the smallest
COMMON-MODE REJECTION RATIO
vs. FREQUENCY
MAX9709 toc21
FREQUENCY (Hz)
CMRR (dB)
10k1k100
-110100k
INPUT REFERRED
POWER-SUPPLY REJECTION RATIO
vs. FREQUENCY
MAX9709 toc22
FREQUENCY (Hz)
PSRR (dB)
10k1k100
-110100k
CROSSTALK vs. FREQUENCY
MAX9709 toc23
FREQUENCY (Hz)
CROSSTALK (dB)
10k1k100
-120100k
MAXIMUM STEADY-STATE OUTPUT POWER
vs. TEMPERATURE (STEREO MODE)
MAX9709 toc24
AMBIENT TEMPERATURE (°C)
OUTPUT POWER PER CHANNEL (W)504070
fIN = 1kHz
TH0 = TH1 = 1
TH2 = 0
MAXIMUM STEADY-STATE OUTPUT POWER
vs. TEMPERATURE (MONO MODE)*
MAX9709 toc25
AMBIENT TEMPERATURE (°C)
OUTPUT POWER (W)5040
*MEASURED WITH THE MAX9709EVKIT,
JUNCTION TEMPERATURE MAINTAINED AT +110°C.
RLOAD = 4Ω
fIN = 1kHz
TH0 = TH1 = 1
TH2 = 0
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Typical Operating Characteristics (continued)
Pin Description
PINNAMEFUNCTIONC1NCharge-Pump Flying Capacitor C1, Negative TerminalC1PCharge-Pump Flying Capacitor C1, Positive TerminalCPVDDCharge-Pump Power Supply. Bypass to PVDD with a 1µF capacitor as close to pin as possible.SYNCOUTOpen-Drain Slew-Rate-Limited Clock Output. Pullup with a 10kΩ to resistor to REG.SYNCINClock Synchronization Input. Allows for synchronization of the internal oscillator with an external clock. FS2Frequency Select 2FS1Frequency Select 1INL-Left-Channel Negative Input (Stereo Mode Only)INL+Left-Channel Positive Input (Stereo Mode Only)MONOMono/Stereo Mode Input. Drive logic high for mono mode. Drive logic low for stereo mode.
19, 20, 21REGInternal Regulator Output Voltage (6V). Bypass with a 0.01µF capacitor to GND.
22, 23GNDAnalog GroundSSSoft-Start. Connect a 0.47µF capacitor to GND to utilize soft-start power-up sequence.VDDAnalog Power Supply. Bypass to GND with a 0.1µF capacitor as close to pin as possible.INR-Right-Channel Negative Input. In mono mode, INR- is the negative input.INR+Right-Channel Positive Input. In mono mode, INR+ is the positive input.G1Gain Select input 1G2Gain Select input 2SHDNActive-Low Shutdown Input. Drive SHDN high for normal operation. Drive SHDN low to place the
device in shutdown mode.MUTEActive-Low Mute Input. Drive logic low to place the device in mute. In mute mode, Class D output stage is no longer switching. Drive high for normal operation. MUTE is internally pulled up to VREG with a100kΩ resistor. TEMPThermal Flag Output, Open Drain. Pullup with a 10kΩ resistor to REG.TH2Temperature Flag Threshold Select Input 2TH1Temperature Flag Threshold Select Input 1TH0Temperature Flag Threshold Select Input 0
45, 46OUTR-Right-Channel Negative Output
47, 48OUTR+Right-Channel Positive Output
51, 52OUTL-Left-Channel Negative Output
53, 54OUTL+Left-Channel Positive OutputGNDExposed Paddle. Connect to GND with multiple vias for best heat dissipation.
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Pin Description (continued)
OUTR+
OUTR-
OUTL-
OUTL+
SYNCIN
INL+
INL-
INR+
INR-
SHDN
SYNCOUT
PGND
RIN
RIN
RIN
RIN
VBIAS
VBIAS
TH0TH1TH2
TEMP
CPVDD
PVDD
PVDD
PVDD
PVDD
PVDD
VDD
VDD
C1P
C1N
REG
LEFT
CHANNEL
RIGHT
CHANNEL
VDIGITAL
1µF
0.1µF
0.1µF47µF*
1µF
1µF
1µF
1µF
CREG
0.01µF
CSS
0.47µFVDIGITAL
VDIGITAL
VDIGITAL
VDIGITAL
GND
MONO
FS1
FS2
10kΩ
10kΩ3433
19, 20, 21
51, 52
53, 54
45, 46
47, 48
22, 232–4, 39–41, 49–505–7, 36–3825
MUTE31
*ADDITIONAL BULK CAPACITANCE
CONFIGURATION: TQFN STEREO MODE, SSM, INTERNAL OSCILLATOR, GAIN = 22dB, THERMAL SETTING = +120°C
MAX9709
GAIN
CONTROL
CONTROL
CHARGE
PUMP
REGULATOR
THERMAL SENSOR
MUX
CLASS D
MODULATOR
AND H-BRIDGE
CLASS D
MODULATOR
AND H-BRIDGE
MAX970925W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Ampliier
Typical Application Circuits/Functional Diagrams

Partno	Mfg	Dc	Qty	Available	Descript
MAX9709ETN+	MAXIM	N/a	150	avai	25W/50W, Filterless, Spread-Spectrum, Stereo/Mono, Class D Amplifier