《電子技術(shù)應(yīng)用》
您所在的位置:首頁 > 模擬設(shè)計(jì) > 解決方案 > NXPTDF8554JI2C總線控制4x45W音頻功率放大方案

NXPTDF8554JI2C總線控制4x45W音頻功率放大方案

2011-09-22

NXP公司的TDF8554J 是集成了多個電壓穩(wěn)壓器和兩個功率開關(guān)的I2C總線控制的4x45W音頻功率放大器.放大器采用基于SOI的BCD工藝,采用互補(bǔ)的DMOS輸出級,具有大輸出信號和完美的聲音質(zhì)量.器件工作電壓可低至6V,I2C總線模式(3.3V和5V兼容),能驅(qū)動2歐姆或4歐姆負(fù)載,揚(yáng)聲器故障檢測,可編程增益 (26 dB和16 dB),主要用在汽車音頻系統(tǒng).本文介紹了TDF8554J 主要特性和優(yōu)勢,方框圖, 地線損耗和VP損耗測量電路圖,以及測量和應(yīng)用電路圖與PCB元件布局圖.

The TDF8554J is one of a new generation of complementary quad Bridge-Tied Load (BTL) audio power amplifiers with full I2C-bus controlled diagnostics, multiple voltage regulator and two power switches intended for automotive applications.

The TDF8554J can operate at a battery voltage as low as 6 V making this amplifier suitable for stop/start-car operation. The amplifier uses a complementary DMOS output stage in a Silicon-On-Insulator (SOI)-based BCD process. The DMOS output stage ensures a high power output signal with perfect sound quality. The SOI-based BCD process ensures a robust amplifier, where latch-up cannot occur, with good separation between the four independent channels with every component isolated and without substrate currents.

The multiple voltage regulator comprises four programmable voltage regulators, one standby regulator and two power switches.

The TDF8554J is soft- and hardware downwards-compatible with its predecessor TDA8589XJ.

The TDF8554J includes features, such as selectable undervoltage for stop/start-cars which can be selected with additional I2C-bus instruction bytes. If these additional bytes are not sent, the TDF8554J has the same functionality as its predecessor IPAS TDA8589XJ.

TDF8554J 主要特性和優(yōu)勢:

? Amplifier

? Stop/start-car prepared: keeps operating without audible disturbance during engine start at a battery voltage as low as 6 V

? I2C-bus mode (3.3 V and 5 V compliant)

? Can drive 2 ohm or 4ohm loads

? Speaker fault detection

? Start-up diagnostics with load detection: open, short, present; filtered for door-slam and chatter relays

? AC load (tweeter) detection with low and high current mode

? Gain select after start-up without audible disturbance

? Programmable gain (26 dB and 16 dB), independently programmable for the front and rear channels

? Line driver mode (16 dB and mid-tap voltage 0.25VP for stop/start-cars)

? Programmable clip detection: 2 %, 5 % or 10 %

? Programmable thermal pre-warning

? If the temperature protection of the regulator is activated, the amplifier is muted before the regulator is switched off

? Loss of ground and open VP safe (with 150 m? series impedance and a maximum supply decoupling capacitor of 2200 ?F)

? All amplifier outputs short-circuit proof to ground, supply voltage and across the load (channel independent)

? All pins short-circuit proof to ground

? Temperature-controlled gain reduction to prevent audio holes at high junction Temperatures

? Programmable low battery voltage detection to enable 7.5 V or 6 V minimum battery voltage operation

? Overvoltage protection (load-dump safe up to VP = 50 V) and overvoltage pre-warning at 16 V

? Offset detection

? Multiple regulator

? Good stability for any regulator with almost any output capacitor

? Five voltage regulators (microcontroller, display, audio processor, mechanical digital and mechanical drive)

? I2C-bus controlled

? Selectable output voltages for regulators 1, 4 and 5

? Low dropout voltage PNP output stages

? High supply voltage ripple rejection

? Low noise for all regulators

? Two power switches (antenna switch and amplifier switch)

? Standby regulator (microcontroller supply) operational during load dump and thermal shut-down

? Low standby quiescent current (only regulator 2 operational)

? Backup functionality for regulator 2

? Protection

? If connection to the battery voltage is reversed, all regulator voltages will be zero

? Able to withstand output voltages up to 18 V if supply line is short-circuited

? Thermal protection to avoid thermal breakdown

? Load-dump protection

? Regulator outputs protected from DC short-circuit to ground or to supply voltage

? All regulators protected by foldback current limiting

? Power switches protected from loss-of-ground

圖1. TDF8554J方框圖

圖2. TDF8554J地線損耗測量電路圖

圖2. TDF8554J VP損耗測量電路圖

圖4. TDF8554J測量和應(yīng)用電路圖

圖5. TDF8554J PCB元件布局圖(頂層)
詳情請見:
http://www.nxp.com/documents/data_sheet/TDF8554J.pdf



本站內(nèi)容除特別聲明的原創(chuàng)文章之外,轉(zhuǎn)載內(nèi)容只為傳遞更多信息,并不代表本網(wǎng)站贊同其觀點(diǎn)。轉(zhuǎn)載的所有的文章、圖片、音/視頻文件等資料的版權(quán)歸版權(quán)所有權(quán)人所有。本站采用的非本站原創(chuàng)文章及圖片等內(nèi)容無法一一聯(lián)系確認(rèn)版權(quán)者。如涉及作品內(nèi)容、版權(quán)和其它問題,請及時通過電子郵件或電話通知我們,以便迅速采取適當(dāng)措施,避免給雙方造成不必要的經(jīng)濟(jì)損失。聯(lián)系電話:010-82306118;郵箱:aet@chinaaet.com。
主站蜘蛛池模板: 成人欧美日韩视频一区 | 免费黄色欧美 | 亚洲日日做天天做日日谢 | 国产欧美日韩第一页 | 中文天堂在线最新2022更新 | 男女扒开双腿猛进入免费看污 | 国产又黄又免费aaaa视频 | 免费人成在线观看网站品爱网 | 16欧美freesex呦交hd | 很黄很色又爽很黄很色又爽 | 日日操网站 | 中文字幕欧美日韩 | 日本成片免费高清 | 最近2019中文字幕大全第二页 | 日本三级香港三级人妇三级 | 高清中文字幕视频在线播 | 国产一区精品在线观看 | 日韩大片免费观看视频播放 | 看全黄大色黄大片美女51la | 国产福利小视频 | 欧美视频不卡一区二区三区 | jyzziyzzz免费视频国产 | 亚洲国产精品乱码一区二区三区 | 亚洲国产第一页 | 久久久噜噜噜久久网 | 亚洲欧美精品综合中文字幕 | 国产16页 | bban在线| 在线成人毛片 | 好好的日视频www | 欧美专区一区二区三区 | 欧美videosex娇小hd | 国产69精品久久久久777 | 欧美在线精品一区二区三区 | 日韩美一区二区三区 | xxxwww欧美性| 手机看日韩片 | 亚洲国产精品激情在线观看 | 窝窝午夜看片成人精品 | 国产成人在线看 | 久久精品九九亚洲精品天堂 |