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TFA9890A

9.5 V高能效內(nèi)嵌DSP的D類(lèi)音頻放大器;

TFA9890A是一款具有先進(jìn)的揚(yáng)聲器升壓和保護(hù)算法的高效率D類(lèi)音頻放大器。該器件可在電源電壓為3.6 V時(shí)向8 Ω揚(yáng)聲器提供7.2 W的峰值輸出功率。內(nèi)部升壓轉(zhuǎn)換器可將電源電壓提升到9.5 V，為充分提升聲質(zhì)提供了充足余量。\r\n\r\n各種工況下都能為揚(yáng)聲器提供安全的工作環(huán)境。TFA9890A可在確保振膜位移和音圈溫度不超過(guò)其額定極限的同時(shí)實(shí)現(xiàn)最大的聲音輸出。此功能基于可在所有揚(yáng)聲器環(huán)境（例如自由空氣、密閉盒或通風(fēng)盒）中運(yùn)行的音箱模型。 此外，先進(jìn)的信號(hào)處理功能可確保音頻信號(hào)的質(zhì)量不會(huì)因放大器或揚(yáng)聲器中的不必要削波或失真而降低。\r\n\r\n與其他解決方案不同，自適應(yīng)聲音激勵(lì)器算法使用反饋來(lái)同時(shí)精確計(jì)算溫度和振幅，從而使TFA9890A適應(yīng)聲學(xué)環(huán)境中的變化。\r\n\r\n內(nèi)部智能DC-DC轉(zhuǎn)換可提升電源軌，以提供額外的余量和功率輸出。電源電壓僅在必要時(shí)升高，因此可以最大程度地提高D類(lèi)音頻放大器的輸出功率，同時(shí)限制靜態(tài)功耗。\r\n\r\nTFA9890A還集成了高級(jí)電池保護(hù)功能。通過(guò)在電池電壓低時(shí)限制電源電流，可防止音頻系統(tǒng)從電池中消耗太多的負(fù)載電流(這可能會(huì)造成系統(tǒng)欠壓)。通過(guò)防止電池放電時(shí)的失真，高級(jí)處理器可最大限度減少不斷下降的電池電壓對(duì)音頻質(zhì)量的影響。\r\n\r\n該器件具有低RF敏感度，因?yàn)樗哂袑?duì)時(shí)鐘抖動(dòng)不敏感的數(shù)字輸入接口。D類(lèi)音頻放大器中使用的二階閉環(huán)結(jié)構(gòu)提供了出色的音頻性能和高電源電壓紋波抑制。音頻輸入接口是I2S，控制設(shè)置通過(guò)I2S總線(xiàn)接口進(jìn)行通信。\r\n\r\n該設(shè)備還為揚(yáng)聲器提供了強(qiáng)大的保護(hù)，可防止ESD損壞。在典型的應(yīng)用中，不需要額外的組件即可承受揚(yáng)聲器上的15 kV放電。\r\n\r\nTFA9890A采用49焊球晶圓級(jí)芯片尺寸封裝 (WLCSP)，間距為400 μm。

TFA9890AUK

9.5 V boosted audio system with adaptive sound maximizer and speaker protection; \n\n\nSophisticated speaker-boost and protection algorithm that maximizes speaker\nperformance while protecting the speaker:\n\nFully embedded software, no additional license fee or porting required\n\nTotal integrated solution that includes DSP, amplifier, DC-to-DC, sensing and more\n\n\n\n\nAdaptive excursion control - guarantees that the speaker membrane excursion never\nexceeds its rated limit\n\nReal-time temperature protection - direct measurement ensures that voice coil\ntemperature never exceeds its rated limit\n\nEnvironmentally aware - automatically adapts speaker parameters to acoustic and\nthermal changes including compensation for speaker-box leakage\n\nSpeaker error detection (detects faulty speakers and enclosures)\n\nOutput power: 3.6 W (RMS) into 8 Ω at 3.6 V supply voltage (THD = 1 %)\n\nClip avoidance - DSP algorithm prevents clipping even with sagging supply voltage\n\nBandwidth extension option to increase low frequency response\n\nCompatible with standard Acoustic Echo Cancellers (AECs)\n\nHigh efficiency and low power dissipation\n\nWide supply voltage range (fully operational from 2.7 V to 5.5 V)\n\nTwo I2S inputs to support two audio sources\n\nI2C-bus control interface (400 kHz)\n\nDedicated speech mode with speech activity detector\n\nSpeaker current and voltage monitoring (via the I2S-bus) for Acoustic Echo\nCancellation (AEC) at the host\n\nFully short-circuit proof across the load and to the supply lines\n\nSample frequencies from 8 kHz to 48 kHz supported\n\n3 bit clock/word select ratios supported (32x, 48x, 64x)\n\nOption to route I2S input direct to I2S output to allow a second I2S output slave device\nto be used in combination with the TFA9890A\n\nTDM interface supported (with limited functionality)\n\nVolume control\n\nLow RF susceptibility\n\nInput clock jitter insensitive interface\n\nThermally protected\n\n15 kV system-level ESD protection without external components\n\n‘Pop noise' free at all mode transitions\n\n\n;

Overview \nThe TFA9890A is a high efficiency class-D audio amplifier with a sophisticated speaker\nboost and protection algorithm. It can deliver 7.2 W peak output power into an 8 Ω\nspeaker at a supply voltage of 3.6 V. The internal boost converter raises the supply\nvoltage to 9.5 V, providing ample headroom for major improvements in sound quality.\n\nA safe working environment is provided for the speaker under all operating conditions.\nThe TFA9890A maximizes acoustic output while ensuring diaphragm displacement and\nvoice coil temperature do not exceed their rated limits. This function is based on a\nspeaker box model that operates in all loudspeaker environments (e.g. free air, closed box\nor vented box). Furthermore, advanced signal processing ensures that the quality of the\naudio signal is never degraded by unwanted clipping or distortion in the amplifier or\nspeaker.\n\nUnlike competing solutions, the adaptive sound maximizer algorithm uses feedback to\naccurately calculate both the temperature and the excursion, allowing the TFA9890A to\nadapt to changes in the acoustic environment.\n\nInternal intelligent DC-to-DC conversion boosts the supply rail to provide additional\nheadroom and power output. The supply voltage is only raised when necessary. This\nmaximizes the output power of the class-D audio amplifier while limiting quiescent power\nconsumption.\n\nThe TFA9890A also incorporates advanced battery protection. By limiting the supply\ncurrent when the battery voltage is low, it prevents the audio system from drawing\nexcessive load currents from the battery, which could cause a system undervoltage. The\nadvanced processor minimizes the impact of a falling battery voltage on the audio quality\nby preventing distortion as the battery discharges.\n\nThe device features low RF susceptibility because it has a digital input interface that is\ninsensitive to clock jitter. The second order closed loop architecture used in a class-D\naudio amplifier provides excellent audio performance and high supply voltage ripple\nrejection. The audio input interface is I2S and the control settings are communicated via\nan I2C-bus interface.\n\nThe device also provides the speaker with robust protection against ESD damage. In a\ntypical application, no additional components are needed to withstand a 15 kV discharge\non the speaker.\n\nThe TFA9890A is available in a 49-bump WLCSP (Wafer Level Chip-Size Package) with a\n400 μm pitch.\n\n

9890

Electronic,10C#20SolTC,POIns,OS,POJkt

ProductDescription Electronic,10Conductor20AWG(Solid)TinnedCopper,POInsulation,OverallBeldfoil?Shield,POOuterJacket

9890

3M??ThermallyConductiveAdhesiveTransferTapes

AP9890

PwrCordKit,10A,100-230V,2,(5)C13toC14

BD9890F

DC-ACInverterControlIC

FUNCTION ?2chcontrolwithPush-Pull ?Lampcurrentandvoltagesensefeedbackcontrol ?SequencingeasilyachievedwithSoftStartControl ?ShortcircuitprotectionwithTimerLatch ?UnderVoltageLockOut ?Shortcircuitprotectionwithovervoltage ?Mode-selectabletheoperatingor

BD9890F

DC-ACInverterControlIC

FUNCTION ?2chcontrolwithPush-Pull ?Lampcurrentandvoltagesensefeedbackcontrol ?SequencingeasilyachievedwithSoftStartControl ?ShortcircuitprotectionwithTimerLatch ?UnderVoltageLockOut ?Shortcircuitprotectionwithovervoltage ?Mode-selectabletheoperatingor

BD9890F

SiliconMonolithicIntegratedCircuit

BD9890FV

SiliconMonolithicIntegratedCircuit

BD9890FV

DC-ACInverterControlIC

FUNCTION ?2chcontrolwithPush-Pull ?Lampcurrentandvoltagesensefeedbackcontrol ?SequencingeasilyachievedwithSoftStartControl ?ShortcircuitprotectionwithTimerLatch ?UnderVoltageLockOut ?Shortcircuitprotectionwithovervoltage ?Mode-selectabletheoperatingor