tai-1 microelectronics preliminary TMPA208DS www.taimec.com.tw / www.class-d.com.tw rev.1.0 june 27, 2006 copyright ? 2005,tai-1 microelectronics corp. 1 2.5w stereo class-d audio power amplifier with volume control general description the TMPA208DS is a stereo class-d audio power amplifier with volume control. it delivers up to 2.5w/ch(5w in all) into a 3 ohm load or 2w/ch(4w in all) into a 4 ohm load or 1.25w/ch(2.5w in all) into an 8 ohm load. with differential input structure, TMPA208DS features high common mode rejection ratio and power supply rejection ratio. analog input signal is converted into digital output which drives directly to the speaker. high power efficiency is achieved due to digital output at the load. the audio information is embedded in pwm pulse width modulation . dc volume control is convenient for lcd projectors, lcd monitors, powered speakers, and other consumer products especially when using remote control. applications multimedia application includes cellular phones, pdas, dvd/cd players, tft lcd tvs/monitors, lcd projectors, 2.1 channel audio systems, powered speakers, usb audio. it is also ideal for other portable devices like wireless radios. features 2.5v to 6v single supply up to 5wrms max. power or 2.5wrms/ch. up to 86% power efficiency 3ma /ch quiescent current less than 0.2ua /ch shutdown current pop-less power-up, shutdown and recovery differential 230 khz pwm allows bridge- tied load to increase output power dc volume control btl output requires no output capacitors thermal shutoff and automatic recovery output pin short-circuit protection (short to other outputs, short to vcc, short to ground) compatible with earphone application differential signal processing improves cmrr & eliminates power regulation package tssop20 available for best performance, please refer to http://www.taimec.com.tw/english/evm.htm http://www.class-d.com.tw/english/evm.htm for pcb layout. tai-1 microelectronics corp. reserves the right to make changes to its products and services and to discontinue any product or service without notice. customers should obtain the latest relevant information for reference. testing and quality control techniques are used to screen the parameters. testing of all parameters of each product is not necessarily performed. pdf created with pdffactory trial version www.pdffactory.com
tai-1 microelectronics preliminary TMPA208DS www.taimec.com.tw / www.class-d.com.tw rev.1.0 june 27, 2006 copyright ? 2005,tai-1 microelectronics corp. 2 reference circuit please refer to tmpa002.app for application top view please email david@taimec.com.tw for complete datasheet. tai-1 microelectronics reserves the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. customers are responsible for their products and applications using tai-1 microelectronics components. note that the external components or pcb layout should be designed not to generate abnormal voltages to the chip to prevent from latch up which may cause damage to the device. pdf created with pdffactory trial version www.pdffactory.com
tai-1 microelectronics preliminary TMPA208DS www.taimec.com.tw / www.class-d.com.tw rev.1.0 june 27, 2006 copyright ? 2005,tai-1 microelectronics corp. 3 typical application s1 switch c1 1uf c3 1uf c4 1uf c10 1uf c8 1uf c7 1uf r1 10k r2 50k c5 1uf lin+ sdn volume avdd j1 phonejack stereo vdd c9 1uf rin+ vdd r3 100 vdd r5 100 r4 100 l3 33u c12 1uf l4 33u c13 1uf rout+ rout- l1 33u c11 1uf l2 33u c14 1uf lout+ lout- r12 33k r6 5k r7 5k c15 1nf r8 5k r9 5k c16 1nf r10 0k 1 20 2 19 3 18 4 17 5 16 6 15 7 8 linn linp pgndl pvddl loutp sdnb loutn pvddl rinn rinp bypass pvddr routp pgndr agnd nc 9 10 14 13 routn pvddr volume avdd 11 12 j2 TMPA208DS + c6 470uf + c2 470uf terminal functions terminal name pin no i/o description agnd 10 analog ground bypass 18 o bypass linn 1 i negative differential input for left channel linp 2 i positive differential input for left channel loutn 7 o negative output for left channel loutp 5 o positive output for left channel nc 9 no connection pgndl 6 ground for left channel h-bridge pgndr 15 ground for right channel h-bridge pvddl 4,8 power supply for left channel h-bridge pvddr 13,17 power supply for right channel h-bridge rinn 20 i negative differential input for right channel rinp 19 i positive differential input for right channel routn 14 o negative output for right channel routp 16 o positive output for right channel sdnb 3 i places the amplifier in shutdown mode if a tt l logic low is placed on this terminal; normal operation if a ttl logic high is placed on this terminal avdd 11 analog power supply volume 12 i dc volume control pdf created with pdffactory trial version www.pdffactory.com
tai-1 microelectronics preliminary TMPA208DS www.taimec.com.tw / www.class-d.com.tw rev.1.0 june 27, 2006 copyright ? 2005,tai-1 microelectronics corp. 4 absolute maximum ratings over operating free-air temperature range unless otherwise noted (1) supply voltage range, v dd , pv dd 0.3v to 6v input voltage range, v i 0v to 5.5v continuous total power dissipation see dissipation rating table operating free-air temperature, t a -20 c to 85 c operating junction temperature range, t j -20 c to 150 c storage temperature range, t stg -65 c to 150 c (1)stresses beyond those listed under absolute maximum ratings may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated under recommended operating conditions is not implied. exposure to absolute-maximum-rated conditions for extended periods may affect device reliability. dissipation ratings table package t a 25 c derating factor t a =70 c t a =85 c tssop20(fd) 2.18w 21.8mw/ c 1.2w 872mw recommended operating conditions min typ max unit supply voltage, v dd 2.5 6 v high-level input voltage, v ih sdnb 2 v low-level input voltage, v il sdnb 0.8 v pwm frequency 200 300 khz operating free-air temperature, t a -20 85 c operating junction temperature, t j -20 125 c electrical characteristics t a =25 c , v dd =pv dd =5v (unless otherwise noted) parameter test conditions min typ max unit v os output offset voltage measured differentially v i =0v, a v =20db, r l =8 25 50 mv pssr power supply rejection ratio v dd =pv dd =3.5v to 5.5v -70 db i ih high-level input current v dd =av dd =5.5v, v i =5.8v (sdnb) 30 a i il low-level input current v dd =av dd =5.5v, v i =-0.3v (sdnb) 1 a i dd supply current no load 6 10 ma i dd sd supply current in shutdown mode sdnb=0v 50 1000 na high side 450 600 r ds on drain-source on-state resistance v dd =5v, i o =500ma, t j =25 c low side 450 600 m av voltage gain r l =8 , volume=2.8v 18 db ri input resistance volume=2.8v~0v 24 200 k pdf created with pdffactory trial version www.pdffactory.com
tai-1 microelectronics preliminary TMPA208DS www.taimec.com.tw / www.class-d.com.tw rev.1.0 june 27, 2006 copyright ? 2005,tai-1 microelectronics corp. 5 operating characteristics t a =25 c , v dd =pv dd =5v, r l =8 speaker, gain=18db (unless otherwise noted) parameter test conditions min typ max unit f=1khz, r l =3 , stereo operation 2.5 w f=1khz, r l =4 , stereo operation 2 w p o output power per channel (limited by thermal condition) f=1khz, r l =8 , stereo operation 1.25 w thd+n total harmonic distortion plus noise r l =8 , p o =1.2w, f=1khz 0.4 thermal trip point 150 c thermal hysteresis 20 c vn integrated noise floor 20 hz to 20 khz, inputs ac grounded 85 vrms snr signal-to-noise ratio v dd =av dd =5v, p o =1w, r l= 8 95 db crosstalk crosstalk between outputs v dd =av dd =5v, p o =1w r l =8 -68 db voltage range of volume at different vdd vdd max min 5v 2.8v 0v 3.6v 1.9v 0v 3v 1.3v 0v voltage gain at t a =25 c , r l =8 v dd =pv dd =5v voltage gain voltage of volume 5v 18db/-27db 2.8v/0v 3.6v 18db/-27db 1.9v/0v 3v 16db/-27db 1.4v/0v pdf created with pdffactory trial version www.pdffactory.com
tai-1 microelectronics preliminary TMPA208DS www.taimec.com.tw / www.class-d.com.tw rev.1.0 june 27, 2006 copyright ? 2005,tai-1 microelectronics corp. 6 table 1. typical dc volume control voltage on volume pin (v) typical gain of amplifier (db) 0-0.1 -38 0.1-0.19 -36 0.19-0.29 -34 0.29-0.39 -32 0.39-0.48 -30 0.48-0.58 -28 0.58-0.68 -26 0.68-0.77 -24 0.77-0.87 -22 0.87-0.97 -20 0.97-1.06 -18 1.06-1.16 -16 1.16-1.26 -14 1.26-1.35 -12 1.35-1.45 -10 1.45-1.55 -8 1.55-1.64 -6 1.64-1.74 -4 1.74-1.84 -2 1.84-1.93 0 1.93-2.03 2 2.03-2.13 4 2.13-2.22 6 2.22-2.32 8 2.32-2.42 10 2.42-2.51 12 2.51-2.61 14 2.61-2.71 16 2.71-2.8 18 2.8-2.9 20 2.9-vdd *not fully tested but guaranteed by design. **this table is only for vdd=5v pdf created with pdffactory trial version www.pdffactory.com
tai-1 microelectronics preliminary TMPA208DS www.taimec.com.tw / www.class-d.com.tw rev.1.0 june 27, 2006 copyright ? 2005,tai-1 microelectronics corp. 7 physical dimensions (in millimeters) 4.16 typ 7.72 typ 0.42 typ 0.65 typ (1.78 typ) land pattern tssop20 pdf created with pdffactory trial version www.pdffactory.com
tai-1 microelectronics preliminary TMPA208DS www.taimec.com.tw / www.class-d.com.tw rev.1.0 june 27, 2006 copyright ? 2005,tai-1 microelectronics corp. 8 important notice tai-1 microelectronics corp. reserves the right to make changes to its products and services and to discontinue any product or service without notice. customers should obtain the latest relevant information for reference. testing and quality control techniques are used to screen the parameters. testing of all parameters of each product is not necessarily performed. tai-1 microelectronics corp. assumes no liability for applications assistance or customer product design. to minimize the risks associated with customer products and applications, customers should provide adequate design and operating safeguards. reproduction of information in data sheets or related documentation is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. tai-1 microelectronics corp. is not responsible or liable for such altered documentation. resale of tai-1 microelectronics corp. products or services with statements different from the parameters stated by tai-1 microelectronics corp. for that product or service voids all express and any implied warranties. tai-1 microelectronics corp. is not responsible or liable for any such statements. copyright ? 2005,tai-1 microelectronics corp. pdf created with pdffactory trial version www.pdffactory.com
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