PL-AD-160Shenzhen pile electronic technology development based on InfineonMA12070High end digital power amplifier products based on DSP¡£MA12070It is an efficient fully integrated digital audio power amplifier based on multi-stage switch technologyIC£¬With Infineon`s enhanced design and production standards£¬PL-AD-160Series products can ensure high reliability and stability throughout the life cycle¡£Best in class audio performance in small package£¬Suitable for design engineers to develop products for home and professional audio applications¡£Main features of products£º1. have 3 Grade and 5 Multilevel switching technology based on multilevel modulation£¬This scheme has unparalleled power efficiency - The power consumption of music playing is optimized£¬It has very low energy consumption¡£2. 2×80W Peak output power£¨26V PVDD£¬RL = 4¥Ø£¬10% THD+N level£©£¬Ultra Compact£¬Highly integrated solution ?Realize high power and small figure¡£3. It can be flexibly realized through the dial switch on the board 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 is better than the traditional second-order loop in error suppression£¬So as to ensure very low signal distortion¡¢Excellent audio performance£¬Even if the power supply is not ideal£¨There`s noise or ripple£©£¬It still guarantees low distortion, high sound quality and stability¡£5. <160mW Idle dissipated power£¨26V PVDD£¬All channel switches£©£»The power is 2W Hourly efficiency >80%£¨1kHz sine wave£¬8¥Ø£©£»Efficiency at full power >91%£¨1kHz sine wave£¬8¥Ø£©¡£6. Audio performance (PMP2)£º>110dB SNR£¨A-w£¬be relative to 1% THD+N Power level£©£¬No complex design of dynamic following power supply£¨Design scheme of audio power supply with conventional coordination to improve energy efficiency£©¡£7. 45µV Output integrated noise (A-w)£¬In most applications, a low-pass filter is not required£¨LPF£©¡£8. High output level THD+N by 0.004%¡£9. I2C control£¨Four optional addresses of on board dial switch£©£¬It can be connected to MCU to control the working mode of the chip£¬Balance performance and power consumption£¬It can be customized in various applications¡£10. Built in protection£ºUndervoltage blocking¡¢Overheat warning/error£¬short circuit/overload protection¡¢Power stage pin to pin short circuit¡¢Through serial interface (I2C) Send error report and DC protection¡£11. Four layers of goldPCB+Anodized radiator£¬It has excellent heat dissipation and low costEMI¡£Scope of application1. Portable audio - Battery powered speakers£¬Mobile Bluetooth speaker£¬Pedestal audio£¬Portable audio£¬Wearable audio2. home audio - Multi room system£¬television£¬Phonetic column£¬Home theater system£¬Independent component3. Voice control audio4. Professional audio - Active monitor speaker£¬Power over Ethernet£¨PoE£©£¬Multichannel system
Advantages and working principle of multilevel Technology Despite the traditionalDThe efficiency of class a audio amplifier has been achieved90%And above£¬But its relatively high power¡¢Only the50%Common volume efficiency of left and right£¬Plus it`s good for youLCRequirements of filters and radiators£¬Make it occupy more space£¨The cost is also higher£©¡£MERUS¢â multistageDClass amplifiers break these limitations¡£Its technological innovation has brought the following advantages£º ? No output requiredLCwave filter£¬Smaller size£¬Lower cost? Improve the efficiency of common volume? Significantly reduce power consumption£¬Reduced heat dissipation? Multistage switch benefiting from high frequency£¬The details of the sound source can be preserved, and the sound quality and sense can be improved¡£This breakthrough amplifier product uses multi-stage half bridge power stage£¬In standby or near standby£¬It can achieve low power consumption¡£Different from the traditionalDClass a amplifier£¬Each half bridge power stage of the product has4A transistor/MOSFET£¨traditionDClass a amplifier is only2individual£©¡£These half bridges build multiple circuits from a single power sourcePWMOutput stage£¨eachMOSFETBy separatePWMSignal driven£©£¬This brings great flexibility£¬And it can configure the best power performance for the amplifier in any application¡£At the top and bottomMOSFETFlying capacitor between£¨Cfly£©Continuous power supply by independent circuit£¬Therefore, the voltage potential can be kept at a fixed level¡£this¡°Flying capacitor¡±It basically acts as an extra power rail¡£thus£¬Each half bridge power stage can establish a three-level output signal at the output switching node£º0 V¡¢½ PVDDandPVDD ¡£ chart1£ºMERUS¢âThe amplifier adopts a unique power stage topology¡£Based on this design£¬Each half bridge can use fourMOSFET£¨M1-M4£©And in these placesMOSFETFly across capacitor for additional power rail£¬A three-level output signal is established at the output switching node¡£ In full bridge load£¨BTL£©Under configuration??It combines two three-level half bridges with switching mode£¬The switching mode of each half bridge is relative to the other90°phase shift??The resulting power stage can provide power for the differential connected speaker load5Stage modulation mode¡£Multistage modulation can produce higher output frequency£¬Each voltage step is also smaller£¬And traditionalDClass amplifier£¬The output audio signal is closer to the input waveform¡£ chart 2£ºMERUS¢âmultistageDClass a amplifier can provide complete bridge load5Stage output signal¡£these ones hereICOf5Stage output£¬The external output stage filtering is no longer needed£¬Thus, the overall power loss is minimized£¬And traditionalDClass amplifier£¬The output audio signal is also closer to the input waveform¡£ this5The switching frequency of the output node is increased to four times of the original one£¬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 for filter free operation¡£under these circumstances£¬The load switching frequency of the loudspeaker is the half bridge output nodeMOSFETAnalysis of switching frequency4times¡£It is also worth noting that£¬Switching mode produces three states£¨traditionDClass amplifier can only produce one state£©£¨At this time£¬Complete elimination of out of band switching residuals£©£¬Namely- ½ PVDD¡¢0 Vand+½ PVDD¡£In these States£¬Both half bridge outputs are either0V£¬Or it`s going to have a full impact¡°image¡±Of50%Duty cycle output¡£In application£¬This will directly reduce the ripple current of the audio system output¡£Because there is no need to suppress out of band switching noise or artifacts£¬Therefore, most of them are in the application£¬In case of no need to use common modeLCwave filter¡£The effect of ripple current reduction is shown in Fig3¡£When standardization becomes traditionalDRipple current time of class a amplifier£¨Purple line£©£¬Three level or half bridge£¨Green line£©and5Level orBLT£¨Grey line£©The ripple current of modulated output signal becomes smaller obviously¡£therefore£¬In addition to inherently improving switching efficiency£¬The ripple current of the external components is reduced£¬The total power consumption and power loss are also significantly reduced¡£ chart3£ºThe ripple current of external components is significantly reduced£¬The total power consumption and power loss of audio applications are also reduced¡£0Three level and five level signals in state£¬Ripple free current¡£ multistageDClass a amplifiers bring design advantages 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 system with longer battery life or smaller battery volume¡£ chart4aand4b£ºMERUS¢â MA12040multistageDThe power consumption of class a amplifier in standby mode is only 0250 mW¡£Near standby£¬The power consumption is relatively stable£¬Obviously lower than the traditionalDClass a amplifier£¬Each channel can even reach2W¡£Compare the picture on the right£¬The importance of improving power consumption can be found£¨MERUS¢â MA12040Where is the amplifier4 §ÙThe maximum output power under load is40W£»In this case, both are used18VPower rail£©¡£Because the total power consumption depends on the average power loss£¬And when reproducing the common audio signal£¬Mainly depends on the standby loss£¬And the most commonDClass amplifier£¬The total power efficiency improvement factor of multistage amplifier is4Or more¡£The digital control interface is used£¬By selecting different modulation mode and switching frequency£¬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 low costEMI¡£Because there is no need to use a large number of filters to suppress unnecessary interference£¬Even in high power applications£¬Multistage amplifiers don`t have to rely on eitherLCandRCwave filter£¬It`s a direct drive speaker£¬This reduces application costs¡£Even if the audio product designers still want to use itLCwave filter£¬They are also better than traditional onesDThe volume of class a amplifier is small¡£ Low power loss means less heat is generated£¬Lower operating temperature¡£In many cases£¬The amplifier circuit board itself can provide enough heat dissipation capacity£¬Even high power applications that usually require dedicated radiators are no exception¡£Due to the low operating temperature inside the audio equipment£¬During high output power operation£¬For example, when playing music at high volume£¬It has a bigger margin¡£Lower operating temperature reduces thermal accelerated aging£¬therefore£¬This also improves the reliability of audio devices¡£
The size of the solution is80 mm x60 mm£¬The output power of each channel is up to80 W¡£Only one half bridge output of the amplifier is combined with a miniaturized amplifierEMIwave filter¡£Analog and digitalMERUS¢âThe power amplifier chips are integrated with a built-in fourth-order feedback loop£¬This can more effectively suppress the error that may reduce the sound quality¡£The multistage amplifier uses audio signal to modulate the signal in the fourth-order feedback control loopPWMDuty cycle of the signal¡£therefore£¬The fourth-order loop multilevel switch topology is combined with dynamic power management scheme£¬It breaks the limitation of efficiency and compactness of audio amplifier solution£¬Excellent audio quality¡£PL-AD-160It can bring inspiration to product designers£¬Help them develop the most efficient portable audio devices in the world£¬Finally, it will win the favor of a large group of environmental protection consumers who pursue innovative products¡£
Module size information
long£º80mm£¬wide£º60mm£¬high£º35mm
weight£º100g
Module interface description
1. DC power input terminal¡£The order from top to bottom is£ºVIN+£¬GND£¬VIN+£¬GND£¬TwoVIN+And twoGNDThey are connected on the board to facilitate the cascade of modules¡£VIN+The maximum input voltage is DC+26V£¬Absolute voltage over+27.5VThe chip will be permanently damaged£¡To ensure the output power, please use200WAnd above power supply¡£VIN+The minimum input voltage is+4V£¬Actual recommended use6VAbove power supply¡£
2. Analog audio signal input terminal¡£The order from top to bottom is£ºIN0A£¬IN0B£¬GND£¬IN1A£¬IN1B£¬Corresponding toSPEAK0A£¬SPEAK0B£¬SPEAK1A£¬SPEAK1BAudio input terminal of¡£The gain of the whole board is the default20dB¡£
3. External control communication input terminal¡£The order from left to right is£ºSCL£¨IICClock pin of£©£¬SDA£¨IICData pin of£©£¬GND£¨land£©£¬EN£¨When the chip is pulled up, it will be reset£©£¬MUTE£¨Mute output£¬Pull down effective£©¡£
4. IICAddress selection pin£¬It is used to control the selection of multiple chips when multiple modules are used in parallelIICaddress¡£position1£ºAD0£¬position2£ºAD1¡£
5. Chip operation mode selection¡£position1£ºMSEL1£¬position2£ºMSEL0¡££¨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£º
position1/position2=0/1 :2Channel single ended output£¨SE£©+1Channel half bridge output£¨BTL£©£¬At this time, the output power of each channel is 040W£¬The output power of half bridge is80W¡£The connection method is shown in the figure below£º
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£º
position1/position2=1/1:1Two channel half bridge output£¨PBTL£©£¬At this time, the single channel output power is 0160W¡£The connection method is shown in the figure below£º
6. Audio power stage output¡£The order from top to bottom is£ºSPEAK0A£¬SPEAK0B£¬SPEAK1A£¬SPEAK1B¡£
7. Power indicationLED¡£Green or blueLED£¬When the power on is normal, the system will stopLEDIt should be always on£¬It indicates that the power supply of the module is normal¡£
Module usage steps
1. Set the position correctly5The dialing switch of£¬And the correct corresponding horn hardware connection¡£
2. stay1Set the voltage of the interface correctly and connect the DC power supply£¬You can see the location7OfLEDlight up¡£
3. stay2The interface connects the input sound source correctly¡£
4. Other parts can work normally without connection¡£
explain£ºDue to the version iteration function improvement£¬The actual delivery may be slightly different from the picture£¬Do you mind taking pictures carefully¡£Subsequent deliveryPCBAll are black£¬No more greenPCBedition¡£