[introduction]Limited company of technology of Shanghai analogy semiconductor (the following abbreviation ” analogy semiconductor ” or ” analogy ” ) mixture chip of the imitate that precedes as home and digital-to-analogue devises a note of the ancient Chinese five-tone scale, what innovating through its is medium high-power imitate / digital meritorious service puts a technology, heavy model consumes the technical level of product of frequency of the high end in electronic market. Rise abruptly of the industry quickly as homebred semiconductor, analogy semiconductor is based on his 17 years result the group that puts experience of research and development, additional monarch circuit, dedicated in high-power imitate / digital meritorious service puts a domain. Products plan of frequency of its high end is outputted in power not only and congener contest was surmounted to taste on efficiency, more heat up function and compositive high-ranking algorithm with its come loose outstandingly, satisfied the ceaseless pursuit that the market experiences to high quality frequency.

Summary

Limited company of technology of Shanghai analogy semiconductor (the following abbreviation ” analogy semiconductor ” or ” analogy ” ) mixture chip of the imitate that precedes as home and digital-to-analogue devises a note of the ancient Chinese five-tone scale, what innovating through its is medium high-power imitate / digital meritorious service puts a technology, heavy model consumes the technical level of product of frequency of the high end in electronic market. Rise abruptly of the industry quickly as homebred semiconductor, analogy semiconductor is based on his 17 years result the group that puts experience of research and development, additional monarch circuit, dedicated in high-power imitate / digital meritorious service puts a domain. Products plan of frequency of its high end is outputted in power not only and congener contest was surmounted to taste on efficiency, more heat up function and compositive high-ranking algorithm with its come loose outstandingly, satisfied the ceaseless pursuit that the market experiences to high quality frequency.

Analogy semiconductor will offer as current as market product continuously compatible, software designs the meritorious service with handy, friendly diapason to put a product, ensure outstanding frequency performance achieves on the product such as sound box, TV, measuring projector.

One, digital meritorious service is put

AU68x5 series product is first belt that analogy rolls out of DSP in power number meritorious service is put, it is high end technically TV, medium the applied design of measuring projector of power sound box, high end.

Express 1 Digital meritorious service is put

1.1 exceedingly good main index

Congener result puts big plant of photograph comparing international, analogy number meritorious service puts Rdson to want small Ω of a few M, have greater not lack fidelity power and taller efficiency (12V, 1SPW, > 90% ) . To product of sound box, Soundbar, below load of common 18V power supply, 4 Ω , 1% lack fidelity and OK the high-power output that achieves 2*30W, the power that satisfies common 2*20W easily outputs a requirement. To product of TV measuring projector, below load of common 12V, 6 Ω , 1% lack fidelity can output 2*11W, satisfy the power requirement of 6 Ω 8W/10W.

Graph 1 Power of VS of AU681x power supply

Of profit from elaborate design low guide electrify block (Rdson is worth for 110m Ω model) , of analogy semiconductor demonstrate board in load of 12V power supply, 4 Ω the condition falls, the modulation frequency that use BD pattern and installs 768kHz undertook a meticulous temperature rise contrast checks.

The test shows as a result, when 2*1W outputs power, the competitive product on the temperature of AU6815 chip and market comparatives. However, as the promotion of power, the advantage of AU6815 is shown gradually. When 2*10W is outputted, the chip surface temperature of AU6815 is tasted under contest significantly, part low 22 ℃ and 37.9 ℃ . When output power is added to 2*20W when, because temperature is exorbitant,contest tastes chip had sparked lukewarm protection (OTP) , and AU6815 still is stabilized move. This makes clear, below same power condition, the temperature rise control of AU6815 is more outstanding, be opposite when the design for the client thereby the choice of norms of PCB ply number, carbon fin and cupreous skin ply offerred bigger flexibility and convenience sex.

The result of analogy semiconductor put a product to use advanced closed circuit framework, photograph of this one design relatively reduced bottom a confusion of voices significantly at framework of traditional open loop (35uVrms Typ) with lack fidelity level (≤ 0.03%@1k, 1W) . Profit from this, even if falls in Jing Yin or small signal condition, the sound of output still pure and immaculate, believing a confusion of voices to compare is to be as high as 110dB more, ensured outstanding acoustic quality experiences.

Inside limits of whole tone frequency (20Hz comes 20kHz) , the total harmonic below BD mode is lack fidelity add noise (THD+N) under 0.15% , this one function reached industry banner level, showed analogy result adequately to be put in acoustic quality to defend the outstanding performance of true respect. And 1SPW mode falls in 20~20kHZ test, THD+N also is controlled in 0.3% less than, this one mode is in keep efficient with low power comsumption while, still managed exceedingly good lack fidelity property, satisfied the market firm demand to high-end frequency products plan.

Graph 2 The THD+N of AU68x5

1.2 support are high-ranking and algorithmic

The digital meritorious service of analogy semiconductor puts range of products compositive advanced DPEQ dynamic bass enhances algorithm, offerred careful frequency to answer tone energy-saving force. This algorithm can be aimed at condition of action of the threshold value of user set and specific frequency Duan Jin to adjust, optimize the bass expression when minor volume, broadcast a condition to fall in large volume at the same time, through intelligence control prevents sound lack fidelity with broken sound phenomenon.

Specific and character, the environment is broadcasted in low volume in, DPEQ algorithm enhances parameter through the low frequency of set, realized the gain promotion to low frequency signal, enhanced the deepness of frequency and strength. And fall in high volume condition, calculate parameter of law self-correcting EQ, ensure output signal won’t exceed equipment to handle ability, because volume passes,avoided thereby big and those who cause is lack fidelity problem.

Through this kind trends adjusts a mechanism, the digital meritorious service of analogy semiconductor puts the bass experience that provided aggrandizement below minor volume not only, and the integrality that also can maintain frequency signal when large volume is broadcasted and definition, satisfied the strict requirement of Audio Engineering division and acoustics lover to high fidelity acoustic quality.

Graph 3 DPEQ algorithm

1.3 innovation answer: Demand of listen respectfully client, hit client pain spot continuously

The product is put in traditional result in, lack pair of power source voltage (PVDD) monitor and temperature induction function is common problem. Be aimed at this one challenge, the result of analogy semiconductor puts a product built-in a series of innovation functions, promote an user in order to satisfy market demand the experience.

• Buildup power source manages: Drop report compositively to detect the mechanism avoided effectively to be owed additionally pressure detect circuit, the transient state noise that optimized the unusual situation that drop report to fall at the same time (Pop Noise) problem.

• Dynamic electric current controls: CBC function adopts the voltaic restriction that the horn carries, protected horn unit not only, what still avoided front power source is unusual pull fall, had avoided effectively to shed protection (OCP) cause break phonic phenomenon.

• Monitoring of real time temperature: Result the temperature that puts chip can be read in real time take, call the police through multistage temperature system, answer overheat circumstance in time, the protection that because temperature is exorbitant,prevented to cause thereby is broken sound.

• Essence of life allows sound field synchronism: Technology of much chip synchronism ensured of sound field accurate and reductive, brought the aural experience of consistency and high fidelity for the user.

Pass these innovation application, the result of analogy semiconductor put a product to solve technical pain spot of the client not only, still offerred more stability and efficient frequency solution.

Graph 4 Function of CBC current limliting prevents OCP to break sound

Graph 5 Synchronous function is accurate and reductive sound field

2, imitate result is put

To satisfy the requirement of market of low cost sound box, analogy semiconductor was rolled out have 3.5V to put AU3138S to the imitate result of suitable scope of 14.5V wide voltage (20/26dB) with AU3138T (32/36dB) . These model pass exterior resistor configuration, offer two archives gain to adjust, covered the gain demand of 20/26/32/36dB in the round, ensured from only part batteries arrives knaggy batteries power supply, and even the wide application of 12V product.

Wait for a product to low cost TV and measuring projector, the imitate meritorious service that we designed 8~14.5V to input voltage limits puts AU3138M (20/26dB) with AU3138P (32/36dB) . These model support exterior adjustment likewise gain, the gain of contented diversification configures demand. Particularly, of 7.4V owe pressed a design to control the transient state noise when dropping report effectively (Pop Noise) , promoted acoustic quality show.

Apply setting in the light of what have acme pursuit to cost effectiveness, analogy semiconductor rolled out the AU3107M that 16pin encloses and AU3108M result to put, support BD and 1SPW modulation pattern respectively. Compare with traditional 28pin product photograph, in keep identical while power is outputted, offerred higher sexual price to compare, for cost sensitive model the solution that the product offerred ideal.

Express 2 Imitate result is put

2.1 exceedingly good main index

The imitate result of analogy semiconductor puts a product to support BD and 1SPW in the round mode of two kinds of jobs. Below BD mode, result put show an outstanding THD+N performance, index under 0.05% , ensured of frequency signal pure spend and of acoustic quality exquisite degree. And even if falls in 1SPW mode, the function index of THD+N also is less than 0.1% , at the same time static power comsumption falls to 16mA (12V) , promoted significantly can effect comparing. In the meantime, those who combine typical cost to be 140m Ω is extremely low guide electrify block (Rdson) , with the synergism of 1SPW mode, those who came true to exceed 85% is efficient (in load of 12V power supply, 4 Ω the condition falls) .

Graph 6 AU3138 is extremely low lack fidelity rate (<0.05% )

Framework of 2.2 closed circuit, plimit essence is accurate

Our 28pin range of products all supports advanced Plimit function, the essence of framework of closed circuit of this one characteristic profit from allows to design. Analogy result puts adoption power to restrict estimation to calculate a method not to get power source tension (PVDD) fluctuant influence, ensured power restricts a cost (Plimit) stability and accuracy. relatively the open loop framework at the tradition, the power limitation below closed circuit framework is more accurate, provided more reliable function safeguard.

• POUT (of × of POUT (10% THD) = 1.25 was not cut wave)

• RL is laden resistor.

• RS is resistor of total series connection, include RDS(on) and output filter resistance.

• VP is peak value extent, suffer ” fictitious ” voltage course limitation.

2.3 outstanding EMC performance and inside buy is high-ranking the technology that exhibit frequency

Electromagnetism compatibility (EMC) it is a crucial challenge in consuming electronic products plan, and analogy semiconductor debugs experience by right of deep EMC, already gained remarkable success in this one domain. We optimize EMC function not only through the exterior circuit of elaborate design, still be in product interior is compositive the high-ranking technology that exhibit frequency. Begin from design phase, we are dedicated at solving EMC problem, ensure the product can issue stability to move in all sorts of electromagnetism environments.

Profit from this kind of synthetic method, although be below the circumstance that adopts magnetism bead plan, our result puts a product to also can wait for strict EMC standard test easily through EN55013 and EN55022, show an analogy semiconductor to be in the outstanding performance of electromagnetism compatibility respect and dependability.

3, summary

The result of analogy semiconductor put range of products to realize the BOM compatibility of as current as market product on the design, the user of the handy sex that ensured software is designed and diapason software is friendly quality. On function, our product surmounted traditional competitor on main index not only, more have an insight into through development client demand, introduced innovation function, solved the client’s pain spot effectively.

Our digital meritorious service puts a product, a confusion of voices of the algorithmic support that abounds by right of its, low end and low lack fidelity character, perfect and contented the market is right the demand of products plan of high quality frequency. Meanwhile, imitate result puts product criterion with its outstanding cost effectiveness, satisfied a client sensitive to cost model applied demand, fit the consumptive electron product such as sound box, TV, measuring projector especially.

(author: Analogy semiconductor on June 5, 2024)

 

Avoid duty statement: The article is reprint an article, reprint this article purpose to depend on passing more information, the person that copyright puts in original work ‘s charge is all. If involve work copyright issue,article place uses video, picture, written language, contact please small make up undertake handling.

Recommend read:

Apply double MOSFET to avoid the effect of SEU

“Solid this strong base ” effect is distinct, yuan company of parts of an apparatus, equipment signs up actively electron of the 104th China is exhibited

Red head file! Attend about inviting dozenth a China (western) the announcement of electronic information exposition

The polyphase design that crosses inductance voltage regulator, decision-making with balance

Actual combat shares: Tumor electric field treats hardware to devise plan