PL-AD-160It is based on InfineonMA12070High end digital power amplifier products of the scheme。MA12070It is an efficient fully integrated digital audio power amplifier based on multi-level switching technologyIC，With Infineon's enhanced design and production standards，PL-AD-160Series products ensure high reliability and stability throughout the life cycle。Delivers best in class audio performance in a small package，Suitable for design engineers to develop products for home and professional audio applications。 Main characteristics of the product： 1.    have 3 Level sum 5 Multistage switching technology of multistage modulation，This makes the scheme have unparalleled power consumption and energy efficiency - The power consumption during music playback is optimized，It has extremely low energy consumption。 2.    2×80W Peak output power（26V PVDD，RL = 4Ω，10% THD+N level），Ultra Compact，Highly integrated solutions –Truly realize high power and small body。 3.    Flexible implementation through on-board dial switch 2.0（2*80W）、2.1(1*80W+2*40W)、4.0(4*40W)、1.0(1*160W) Channel output stage configuration。 4.    Fourth order feedback error control can provide better gain，It can suppress the error better than the traditional second-order loop，This ensures very low signal distortion、Superior audio performance，Even if the power supply is not ideal（Noise or ripple），It still ensures low distortion, high sound quality, stability and reliability。 5.    <160mW Idle dissipated power（26V PVDD，All channel switches）；Power is 2W Time efficiency >80%（1kHz sine wave，8Ω）；Efficiency at full power >91%（1kHz sine wave，8Ω）。 6.    Audio performance (PMP2)：>110dB SNR（A-w，be relative to 1% THD+N Power level），No complex dynamic following power supply design is required（Design scheme of sound power supply with conventional cooperation to improve energy efficiency）。 7.    45µV Output integrated noise (A-w)，Low pass filters are not required in most applications（LPF）。 8.    High output level THD+N by 0.004%。 9.    I2C control（The on-board dial switch has four optional addresses），The working mode of the chip can be controlled by an external single chip microcomputer，Balance performance and power consumption，It can be customized in various applications。 10.    Built in protection：Undervoltage lockout、Overheat warning/error，short circuit/overload protection、Power stage pin short circuit to pin、Via serial interface (I2C) Send error report and DC protection。 11.    Four layer gold depositPCB+Anodized radiator，Excellent heat dissipation and extremely lowEMI。 Scope of application 1.    Portable audio - Battery powered speaker，Mobile Bluetooth speaker，Pedestal sound，Portable audio，Wearable audio 2.    home audio - Multi room system，television，Sound column，Home theater system，Independent component 3.    Voice controlled audio 4.    Professional audio - Active monitoring speaker，Ethernet power supply（PoE），Multichannel system

Advantages and working principle of multistage Technology     Despite the traditionalDThe efficiency of class a audio amplifier has been achieved90%And above，But its relatively high power、Only50%Common volume efficiency of left and right，Plus it's rightLCFilter and radiator requirements，Make it occupy more space（The cost is also higher）。MERUS™ multistageDClass amplifiers break these limitations。Its technological innovation brings the following advantages：  › No output requiredLCwave filter，Smaller size，Lower cost › Improved common volume efficiency › Significantly reduce power consumption，Reduced heat dissipation › Thanks to the multi-stage switch of high frequency，The details of the sound source are preserved and the sound quality is improved。 This groundbreaking amplifier product uses a multi-stage half bridge power stage，In standby or near standby，It can achieve low power consumption。Different from traditionalDClass amplifier，Each half bridge power stage of the product has4Transistors/MOSFET（traditionDClass amplifier only2individual）。These half bridges build multiple bridges from a single power supplyPWMOutput stage（eachMOSFETBy separatePWMSignal drive），This brings great flexibility，And can configure the best power performance for the amplifier in any application。At the top and bottomMOSFETFlying capacitance between（Cfly）Continuous power supply by independent circuit，Therefore, the voltage potential can be maintained at a fixed level。this“Flying capacitance”It basically acts as an additional power rail。thus，Each half bridge power stage can establish a three-level output signal at the output switching node：0 V、½ PVDDandPVDD 。       chart1：MERUS™The amplifier adopts a unique power stage topology。Based on this design，Each half bridge can use fourMOSFET（M1-M4）And located in theseMOSFETFlying capacitor used as additional power rail between，A three-level output signal is established at the output switching node。  Under complete bridge load（BTL）Under configuration——That is, two three-level half bridges are combined with switching mode，The switching mode of each half bridge is relative to the other90°phase shift——The resulting power level can provide power for the differentially connected speaker load5Stage modulation mode。Multilevel modulation can produce higher output frequency，Each voltage step is also smaller，With traditionalDClass amplifier comparison，The output audio signal is closer to the input waveform。       chart 2：MERUS™multistageDClass a amplifiers can provide a complete bridge load5Stage output signal。theseICYes5Stage output，External output stage filtering is no longer required，Thus, the overall power loss is minimized，With traditionalDClass amplifier comparison，Its output audio signal is also closer to the input waveform。  this5The stage system increases the switching frequency of the output node to four times the original，The out of band switching residual of the differential connected speaker load is also less。With more efficiency、BetterEMIandEMCAdministration，The amplifier can be effectively configured to operate without a filter。under these circumstances，The speaker load switching frequency is a half bridge output nodeMOSFETSwitching frequency4times。It is also worth noting that，Switching mode produces three states（traditionDClass a amplifiers can only produce one state）（At this time，The out of band switching residual is completely eliminated），Namely- ½ PVDD、0 Vand+½ PVDD。In these States，Both half bridge outputs are either0V，Or it will produce complete“image”Yes50%Duty cycle output。In application，This will directly reduce the ripple current of the audio system output。There is no need to suppress out of band switching noise or artifacts，Therefore, in most applications，Without using common modeLCwave filter。The effect of ripple current reduction is shown in figure3。When standardization becomes traditionalDRipple current of class a amplifier（Purple line），Three level or half bridge（Green line）and5Level orBLT（Grey line）The ripple current of the modulated output signal decreases obviously。therefore，In addition to inherently improving switching efficiency，The ripple current is reduced due to external components，The total power consumption and power loss are also significantly reduced。       chart3：Due to the ripple current of external components is significantly reduced，The total power consumption and power loss of audio applications are also reduced accordingly。0Three level and five level signals in state，Ripple free current。 multistageDDesign advantages of class I amplifier Due to multistageDClass a amplifiers significantly reduce power consumption，Therefore, its operation efficiency has been improved。In addition, it has low power consumption in standby and average volume，Therefore, it is helpful for designers to design portable audio systems with longer battery life or smaller battery volume。    chart4aand4b：MERUS™ MA12040multistageDThe power consumption of class a amplifier in standby is only250 mW。Near standby，The power consumption is relatively stable，Significantly lower than traditionalDClass amplifier，Each channel can even reach2W。Compare the right figure，The importance of improving power consumption can be found（MERUS™ MA12040Amplifier in4 ΩThe maximum output power under load is40W；At this time, both are used18VPower rail）。 Since the total power consumption depends on the average power loss，And when reproducing common audio signals，Mainly depends on standby loss，With the most commonDClass amplifier comparison，The total power efficiency improvement factor of multistage amplifier is4Or above。At this time, the digital control interface is used，You can select different modulation modes and switching frequencies，Different power modes are realized。During amplifier operation，The power management algorithm will automatically select the best power mode according to the given power level。Seamless switching between power modes，It can minimize power loss in the whole output power range，While ensuring high audio performance and lowEMI。Because there is no need to suppress unnecessary interference with the help of a large number of filters，Even in high-power applications，Multistage amplifiers do not have to rely onLCandRCwave filter，Instead, drive the speaker directly，This reduces application costs。Even if audio product designers still want to useLCwave filter，They are also better than traditionDClass a amplifiers are small in size。  Low power loss means less heat is generated，Lower operating temperature。In many cases，The amplifier circuit board itself can provide sufficient heat dissipation capacity，Even high-power applications that typically require the use of dedicated radiators are no exception。Due to the low operating temperature inside the audio device，During high output power operation，For example, when playing music at high volume，It has more margin。Lower operating temperatures reduce thermally accelerated aging，therefore，This also improves the reliability of audio equipment。

   The solution size is80 mm x60 mm，Output power per channel up to80 W。Only one half bridge output of the amplifier is combined with a small amplifierEMIwave filter。 Analog and digitalMERUS™Power amplifier chips are integrated with built-in fourth-order feedback loop，This can more effectively suppress errors that may reduce sound quality。The multistage amplifier uses the audio signal to modulate the signal in the fourth-order feedback control loopPWMDuty cycle of the signal。therefore，This fourth-order loop multistage switching topology is combined with dynamic power management scheme，It breaks the limitations of efficiency and compactness of audio amplifier solutions，Bring you outstanding audio quality。PL-AD-160It can bring inspiration to product designers，Help them develop the world's most efficient portable audio devices，Finally, it won the favor of a large group of environmental protection consumers who pursue innovative products。

Module size information

long：80mm，wide：60mm，high：35mm

weight：100g

Module interface description

1. DC power input。The interface sequence from top to bottom is：VIN+，GND，VIN+，GND，TwoVIN+And twoGNDThey are respectively connected on the board to facilitate module cascade。VIN+The maximum input voltage is DC+26V，Absolute voltage exceeds+27.5VThe chip will be permanently damaged！To ensure the output power, please use200WAnd above power supply。VIN+The minimum input voltage is+4V，Actually recommended6VAbove power supply。

2. Analog audio signal input。The interface sequence from top to bottom is：IN0A，IN0B，GND，IN1A，IN1B，Respectively correspondingSPEAK0A，SPEAK0B，SPEAK1A，SPEAK1BAudio input of。The gain of the whole board is the default20dB。

3. External control communication input。The interface order from left to right is：SCL（IICClock pin），SDA（IICData pin），GND（land），EN（When pulled high, the chip enters the reset state），MUTE（Mute output，Pull down effective）。

4. IICAddress selection pin，It is used to control multiple chip selection when multiple modules are used in parallelIICaddress。position1：AD0，position2：AD1。

5. Chip operating mode selection。position1：MSEL1，position2：MSEL0。（Push up representation1）

position1/position2=0/0 :4Channel single ended output（SE），At this time, the maximum output power of each channel is40W。The connection method is shown in the figure below：

position1/position2=0/1 :2Channel single ended output（SE）+1Channel half bridge output（BTL），At this time, the single ended output power per channel is40W，Half bridge output channel power is80W。The connection method is shown in the figure below：

position1/position2=1/0 :2Channel half bridge output（BTL），At this time, the output power of each channel is80W（Factory default settings）。The connection method is shown in the figure below：

position1/position2=1/1:1Channel double half bridge output（PBTL），At this time, the single channel output power is160W。The connection method is shown in the figure below：

6. Audio power stage output。The interface sequence from top to bottom is：SPEAK0A，SPEAK0B，SPEAK1A，SPEAK1B。

7. Power indicationLED。Green or blueLED，After power on is normal, thisLEDShould always be on，Indicates that the module power supply is normal。

Module usage steps

1. Set the position correctly5Dial switch for，And correctly correspond to the hardware connection of the horn。

2. stay1Correctly set the voltage of the interface and connect the DC power supply，You can see the location7YesLEDlight up。

3. stay2The interface is correctly connected to the input sound source。

4. Other parts can work normally without connection。