Description

• PL-AD-160It is based on InfineonMA12070High finish digital energy amplifier merchandise of the scheme。MA12070It is an effective totally integrated electronic audio energy amplifier in keeping with multi-level switching technologyIC，With Infineon&;s enhanced design and production standards，PL-AD-160Series merchandise make sure high reliability and balance throughout the life cycle。Delivers excellent in class audio performance in a small package，Suitable for design engineers to grow merchandise for home and professional audio applications。 Main traits of the product： 1 have three Level sum 5 Multistage switching expertise of multistage modulation，This makes the scheme have unheard of strength consumption and effort performance - The energy intake during tune playback is optimized，It has extremely low calories consumption。 2 2×80W Peak output power（26V PVDD，RL = 4Ω，10% THD+N level），Ultra Compact，Highly incorporated ideas –Truly notice high power and small body。 3 Flexible implementation via on-board dial swap 2（2*80W）、2(1*80W+2*40W)、4(4*40W)、1(1*160W) Channel output degree configuration。 4 Fourth order feedback error control can provide better gain，It can suppress the mistake better than the ancient second-order loop，This guarantees very low sign distortion、Superior audio performance，Even if the ability delivery 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 performance >80%（1kHz sine wave，8Ω）；Efficiency at full energy >91%（1kHz sine wave，8Ω）。 6 Audio performance (PMP2)：>110dB SNR（A-w，be relative to 1% THD+N Power level），No complicated dynamic following strength delivery design is required（Design scheme of sound strength supply with conventional cooperation to improve energy efficiency）。 7 45µV Output integrated noise (A-w)，Low pass filters usually are not required in maximum applications（LPF）。 eight High output point THD+N by means of 0%。 9 I2C control（The on-board dial change has 4 non-compulsory addresses），The operating mode of the chip can be managed by means of an external single chip microcomputer，Balance performance and tool consumption，It would be custom-made in various applications。 10 Built in protection：Undervoltage lockout、Overheat warning/error，short circuit/overload protection、Power degree pin short circuit to pin、Via serial interface (I2C) Send error report and DC protection。 11 Four layer gold depositPCB+Anodized radiator，Excellent warmth dissipation and extremely lowEMI。 Scope of application 1 Portable audio - Battery powered speaker，Mobile Bluetooth speaker，Pedestal sound，Portable audio，Wearable audio 2 domestic audio - Multi room system，television，Sound column，Home theater system，Independent ingredient 3 Voice managed audio 4 Professional audio - Active monitoring speaker，Ethernet power supply（PoE），Multichannel formula Advantages and dealing precept of multistage Technology Despite the traditionalDThe efficiency of sophistication a audio amplifier has been achieved90%And above，But its comparatively high power、Only50%Common quantity performance of left and right，Plus it&;s rightLCFilter and radiator requirements，Make it occupy extra space（The charge also is higher）。MERUS™ multistageDClass amplifiers break those limitations。Its technological innovation brings the ensuing advantages： › No output requiredLCwave filter，Smaller size，Lower cost › Improved ordinary volume efficiency › Significantly cut strength consumption，Reduced warmth dissipation › Thanks to the multi-stage swap of excessive frequency，The particulars of the sound supply are preserved and the sound high quality is improved。 This groundbreaking amplifier product makes use of a multi-stage 1/2 bridge strength stage，In standby or near standby，It can achieve low strength consumption。Different from traditionalDClass amplifier，Each half bridge power degree of the product has4Transistors/MOSFET（traditionDClass amplifier only2individual）。These half of bridges build a number of bridges from a single power supplyPWMOutput stage（eachMOSFETBy separatePWMSignal drive），This brings super flexibility，And can configure the finest energy performance for the amplifier in any application。At the top and bottomMOSFETFlying capacitance between（Cfly）Continuous power supply through independent circuit，Therefore, the voltage potential would be maintained at a set level。this“Flying capacitance”It primarily acts as an extra strength rail。thus，Each half of bridge energy degree can establish a three-level output signal at the output switching node：0 V、½ PVDDandPVDD 。 chart1：MERUS™The amplifier adopts a distinct energy stage topology。Based on this design，Each 1/2 bridge can use fourMOSFET（M1-M4）And located in theseMOSFETFlying capacitor used as additional energy rail between，A three-level output signal is established on the output switching node。 Under whole bridge load（BTL）Under configuration——That is, two three-level 1/2 bridges are combined with switching mode，The switching mode of every half of bridge is relative to the other90°phase shift——The ensuing energy level may give power for the differentially connected speaker load5Stage modulation mode。Multilevel modulation can produce larger output frequency，Each voltage step also is smaller，With traditionalDClass amplifier comparison，The output audio sign 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 final strength loss is minimized，With traditionalDClass amplifier comparison，Its output audio sign is also nearer to the input waveform。 this5The level formulation will increase the switching frequency of the output node to four occasions the original，The out of band switching residual of the differential connected speaker load is also less。With extra efficiency、BetterEMIandEMCAdministration，The amplifier would be effectively configured to operate without a filter。under those circumstances，The speaker load switching frequency is a half bridge output nodeMOSFETSwitching frequency4times。It also is price noting that，Switching mode produces three states（traditionDClass a amplifiers can solely produce one state）（At this time，The out of band switching residual is absolutely eliminated），Namely- ½ PVDD、0 Vand+½ PVDD。In these States，Both 1/2 bridge outputs are either0V，Or it will produce complete“image”Yes50%Duty cycle output。In application，This will immediately lower the ripple latest of the audio system output。There isn't any deserve to suppress out of band switching noise or artifacts，Therefore, in maximum applications，Without using usual modeLCwave filter。The impact of ripple current reduction is shown in figure3。When standardization turns into traditionalDRipple current of class a amplifier（Purple line），Three point or half bridge（Green line）and5Level orBLT（Grey line）The ripple latest of the modulated output sign decreases obviously。therefore，In addition to inherently convalescing switching efficiency，The ripple current is lowered due to exterior components，The complete energy consumption and power loss are also vastly reduced。 chart3：Due to the ripple latest of external ingredients is tremendously reduced，The whole energy consumption and gear loss of audio purposes also are reduced accordingly。0Three level and 5 level alerts in state，Ripple unfastened current。 multistageDDesign advantages of class I amplifier Due to multistageDClass a amplifiers vastly reduce energy consumption，Therefore, its operation performance has been improved。In addition, it has low energy intake in standby and average volume，Therefore, it's helpful for designers to design transportable audio methods with longer battery life or smaller battery volume。 chart4aand4b：MERUS™ MA12040multistageDThe energy intake of class a amplifier in standby is only250 mW。Near standby，The energy consumption is comparatively stable，Significantly less than traditionalDClass amplifier，Each channel may even reach2W。Compare the correct figure，The importance of convalescing energy intake would be found（MERUS™ MA12040Amplifier in4 ΩThe maximum output strength beneath load is40W；At this time, either are used18VPower rail）。 Since the total strength consumption will depend on the typical energy loss，And when reproducing common audio signals，Mainly is determined by standby loss，With essentially the most commonDClass amplifier comparison，The complete energy performance improvement factor of multistage amplifier is4Or above。At this time, the electronic management interface is used，You can choose diverse modulation modes and switching frequencies，Different energy modes are realized。During amplifier operation，The strength management algorithm will mechanically choose the finest energy mode in line with the given energy level。Seamless switching between strength modes，It can minimize strength loss within the complete output energy range，While guaranteeing excessive audio performance and lowEMI。Because there's no need to suppress unnecessary interference with assistance from a great number of filters，Even in high-power applications，Multistage amplifiers don't have to depend onLCandRCwave filter，Instead, power the speaker directly，This reduces application costs。Even if audio product designers nonetheless wish to useLCwave filter，They are also better than traditionDClass a amplifiers are small in size。 Low strength loss capability much less heat is generated，Lower operating temperature。In many cases，The amplifier circuit board itself may give satisfactory heat dissipation capacity，Even high-power purposes that usually require the use of committed radiators are not any exception。Due to the low working temperature contained in the audio device，During high output energy operation，For example, when playing track at excessive volume，It has more margin。Lower working temperatures minimize thermally accelerated aging，therefore，This additionally improves the reliability of audio equipment。 The answer size is80 mm x60 mm，Output strength consistent with channel up to80 W。Only one 1/2 bridge output of the amplifier is mixed with a small amplifierEMIwave filter。 Analog and digitalMERUS™Power amplifier chips are included with built-in fourth-order feedback loop，This can more efficiently suppress errors that may cut sound quality。The multistage amplifier uses the audio signal to modulate the signal in the fourth-order suggestions 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 excellent audio quality。PL-AD-160It can carry inspiration to product designers，Help them grow the world&;s most efficient moveable audio devices，Finally, it gained the choose of a large group of environmental protection customers who pursue revolutionary products。 Module size information long：80mm，wide：60mm，high：35mm weight：100g Module interface description 1 DC energy input。The interface collection from height to bottom is：VIN+，GND，VIN+，GND，TwoVIN+And twoGNDThey are respectively connected on the board to facilitate module cascade。VIN+The most enter voltage is DC+26V，Absolute voltage exceeds+27 chip could be completely damaged！To make sure the output power, please use200WAnd above energy supply。VIN+The minimum input voltage is+4V，Actually recommended6VAbove power supply。 2 Analog audio sign input。The interface series from top to bottom is：IN0A，IN0B，GND，IN1A，IN1B，Respectively correspondingSPEAK0A，SPEAK0B，SPEAK1A，SPEAK1BAudio input of。The achieve of the whole board is the default20dB。 3 External management communique 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）。 four IICAddress choice pin，It is used to manage a number of chip choice when a number of modules are utilized in parallelIICaddress。position1：AD0，position2：AD1。 5 Chip working mode selection。position1：MSEL1，position2：MSEL0。（Push up representation1） position1/position2=0/0 :4Channel unmarried ended output（SE），At this time, the maximum output strength of each channel is40W。The connection components is shown within the figure below： position1/position2=0/1 :2Channel unmarried ended output（SE）+1Channel 1/2 bridge output（BTL），At this time, the single ended output energy per channel is40W，Half bridge output channel power is80W。The connection formulation is shown in the determine below： position1/position2=1/0 :2Channel half bridge output（BTL），At this time, the output power of every channel is80W（Factory default settings）。The connection method is shown in the figure below： position1/position2=1/1:1Channel double half of bridge output（PBTL），At this time, the one channel output power is160W。The connection formulation is proven within the determine below： 6 Audio energy stage output。The interface sequence from top to backside is：SPEAK0A，SPEAK0B，SPEAK1A，SPEAK1B。 7 Power indicationLED。Green or blueLED，After power on is normal, thisLEDShould constantly be on，Indicates that the module energy supply is normal。 Module usage steps 1 Set the position correctly5Dial switch for，And wisely correspond to the hardware connection of the horn。 2 stay1Correctly set the voltage of the interface and connect the DC strength supply，You can see the location7YesLEDlight up。 3 stay2The interface is correctly linked to the input sound source。 4 Other elements can work normally with out connection。

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