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ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 1 ? features ? 2.5 w/ch into 4 ? from 5v power supply at thd = 10% (typ.). ? 2.5v~5.5v power supply. ? low shutdown current. ? low quiescent current. ? minimum external components. ? no output filter required for inductive loads. ? output pin short-circuit protection (short to output pin, short to gnd, short to vcc) ? low noise during turn-on and turn-off transitions. ? lead free and green package available. (rohs compliant) ? wafer chip scale (wcsp) and tssop 20 pin packaging available. application ? portable electronic devices ? mobile phones, pdas ? dvd/cd players, tft lcd tvs/monitors ? usb audio, 2.1 / 5.1 ch audio system general description the ly8210 is a high efficiency, 2.5 w stereo class d audio power amplifier. it is a low noise, filterless pwm architecture eliminates the output filter, reducing external component count, system cost, and simplify design. the ly8210 is designed to meet of multimedia application includes mobile phones and other portable electronic devices. the ly8210 is a single 5v supply, it is capable of driving 4 ? speaker load at a continuous average outpu t of 2.5 w/ch with 10% thd+n. in cellular handsets, the earpiece, speaker phone, and melody ringer can each be driven by the ly8210. output pin short circuit ( short to output pin, short to ground and short to vdd ) protection prevent the device from damage during fault conditions. block diagram
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 2 ? pin configuration ly8210 wcsp 18 ball pin c onfiguration (top view) ly8210 tssop20 pin conf iguration (top view)
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 3 ? pin description pin no. symbol wcsp tssop description sdl a2 4 shutdown pin of left channel. (when low level is active the pin). inpl(+) c3 5 positive(+) input of left channel. innl(-) a3 17 negative(-) input of left channel. vopl(+) a1 19 positive(+) btl output of left channel. vonl(-) c1 1 negative(-) btl output of left channel. av dd b3/b4 6/16 analog power supply of left and right channel. v dd b2/b5 3/13 power supply of left and right channel. vss c2/a5 b1/b6 8/11/18/20 ground sdr c5 14 shutdown pin of right channel. (when low level is active the pin). inpr(+) a4 7 positive(+) input of right channel. innr(-) c4 15 negative(-) input of right channel. vopr(+) c6 12 positive(+) btl output of right channel. vonr(-) a6 10 negative(-) bt l output of right channel. nc -- 2/9 no connection. ordering information ly 8 210 vv v : package type cl : wscp package al : 20-pin tssop with thermal pad il : 20-pin tssop without thermal pad product name a : product line ly : lyontek product number prefix
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 4 ? package marking format (for wcsp package only) aa b c typical application circuit figure 1. typical application sc hematic with differential input and avdd connect to vdd configuration (wcsp package) c : lot number b : date code product name
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 5 ? figure 2. typical application sc hematic with differential input and avdd increase capacitors configuration(wcsp package). note: in case of avdd and vdd, the use of avdd i ncrease capacitors will optimize the thd+n. absolute maximun ratings* parameter symbol rating unit supply voltage v dd 6.0 v operating temperature t a -40 to 85 (i grade) input voltage v i -0.3v to v dd +0.3v v storage temperature t stg -65 to 150 power dissipation p d internally limited w esd susceptibility v esd 2000 v junction temperature t jmax 150 soldering temperature (under 10 sec) t solder 260
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 6 ? electrical characteristics (t a = 25 ) parameter symbol test condition min. typ. max. unit output offset voltage (measured differentially) |v os | v i = 0 v, av = 2 v/v, v dd = 2.5 v to 5.5 v - - 50 mv high-level input current |i ih | v dd = 5.5 v, v i = 5.8 v - - 200 ua low-level input current |i il | v dd = 5.5 v, v i = 0.3 v - - 10 ua v dd = 5.5v, no load - 6.8 9.0 v dd = 3.6v, no load - 5.6 - quiescent current i q v dd = 2.5v, no load - 4.4 6.4 ma shutdown current i sd v shutdow n = 0.8v, v dd = 2.5v to 5.5v - 0.6 4 a ? operating characteristics (1) (t a = 25 , gain = 2 v/v) parameter symbol test condition min. typ. max. unit v dd =5.0v - 1.5 - v dd =3.6v - 0.7 - thd+n= 10%, f = 1 khz, r l = 8 ? v dd =2.5v - 0.35 - v dd =5.0v - 1.2 - v dd =3.6v - 0.6 - thd+n= 1%, f = 1 khz, r l = 8 ? v dd =2.5v - 0.3 - v dd =5.0v - 2.5 - v dd =3.6v - 1.2 - thd+n= 10%, f = 1 khz, r l = 4 ? v dd =2.5v - 0.5 - v dd =5.0v - 2.0 - v dd =3.6v - 0.9 - out power / channel p o thd+n= 1%, f = 1 khz, r l = 4 ? v dd =2.5v - 0.4 - w p o = 1.0 w, f = 1 khz, r l = 8 ? - 0.03 - p o = 2.0 w, f = 1 khz, r l = 4 ? v dd =5.0v - 0.06 - p o = 0.5 w, f = 1 khz, r l = 8 ? - 0.03 - p o = 0.8 w, f = 1 khz, r l = 4 ? v dd =3.6v - 0.04 - p o = 0.2 w, f = 1 khz, r l = 8 ? - 0.04 - total harmonic distortion + noise thd+n p o = 0.2 w, f = 1 khz, r l = 4 ? v dd =2.5v - 0.04 - % power supply rejection ratio psrr v dd = 2.5 v to 5.5 v - -75 - db common mode rejection ratio cmrr v ic = 1 vpp , f = 217 hz v dd =3.6v - -63 - db signal-to-noise ratio snr po= 1.0 w, rl = 8 ? v dd =5.0v - 91 - db no weighting - 50 - output voltage noise vn v dd = 3.6 v, f = 20 hz to 20 khz, inputs ac-grounded with ci = 2 f a weighting - 36 - uv rms closed-loop gain gv v dd = 2.5v to 5.5v - 150k ? /ri - v/v start-up time from shutdown z i v dd = 2.5v to 5.5v - 1 - ms
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 7 ? typical performanc e characteristics figure 3 total harmonic distortion + noise vs output power (r l = 4 ? , stereo) figure 4 total harmonic distortion + noise vs output power (r l = 8 ? , stereo)
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 8 ? figure 5 total harmonic distortion + noise vs frequency (vdd=5.0v, 4 ? ) figure 6 total harmonic distortion + noise vs frequency (vdd=3.6v, 4 ? )
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 9 ? figure 7 total harmonic distortion + noise vs frequency (vdd=2.5v, 4 ? ) figure 8 total harmonic distortion + noise vs frequency (vdd=5.0v, 8 ? )
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 10 ? figure 9 total harmonic distortion + noise vs frequency (vdd=3.6v, 8 ? ) figure 10 total harmonic distortion + noise vs frequency (vdd=2.5v, 8 ? )
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 11 ? figure 11 efficiency vs output power ( r l =4 ? , 33 h) ly8210 4 ohm rfficiency vs output power 10 20 30 40 50 60 70 80 90 100 0.2 0.3 0.4 0.5 0.6 0.8 1.0 1.2 1.4 1.6 2 2.5 output power (w) efficiency (%) 3.6v 5.0v figure 12 efficiency vs output power ( r l =8 ? , 33 h) ly8210 rl=8 ohm efficiency vs output power 10 20 30 40 50 60 70 80 90 100 0.1 0.2 0.3 0.4 0.5 0.6 0.8 1.0 1.2 1.4 output power (w) efficiency (%) 3.6v 5.0v
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 12 ? ? application information fully differential amplifier the ly8210 is a fully differential amplifier with differ ential inputs and outputs. the fully differential amplifier consists of a differential amplifier and a common-mode am plifier. the differential amplifier ensures that the amplifier outputs a differential voltage on the output that is equal to the differential input times the gain. the common-mode feedback ensures that the common-m ode voltage at the output is biased around v dd /2 regardless of the common-mode voltage at the input. t he fully differential ly8210 can still be used with a single-ended input; however, the ly8210 should be used with differential inputs when in a noisy environment, like a wireless handset, to ensure maximum noise rejection. figure 13. application schematic with diff erential input configuration(wcsp package)
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 13 ? figure 14. application schematic with differential and capacitors input configuration(wcsp package) figure 15. application schema tic with single-ended input configuration(wcsp package)
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 14 ? figure 16. application schematic with differential and capacitors input configuratio n(tssop package) figure 17. application schema tic with single-ended input configuration(tssop package)
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 15 ? input resistors (ri) and gain the ly8210 has two internal amplifier st ages. the pre-amplifier gain is extern ally configurable, while the total gain is internally fixed. the closed-loop gain of the pre-am plifier gain is set by select ing the rf to ri while the total gain is fixed at 2x. so the input resistors (r i ) set the gain of the amplifier according to the equation. pre-amplifier gain = rf / ri total gain = (rf / ri ) x 2 a vd = 20 x log [2 x (rf /ri )] the resistor matching is very important in the amp lifiers. balance of the output on the reference voltage depends on matched ratio of the resistors. cmrr, psrr, and cancellation of the second harmonic distortion if resistor mismatch occurs. therefore, it is recomm ended to use 1% tolerance resistors or better to keep the performance optimized. matching is more important than overall tolerance. resistor arrays with 1% matching can be used with a tolerance greater than 1%.place the input resistors very close to the ly8210 to limit noise injection on the high -impedance nodes. for optimal performance the gain should be set to 2 v/v or lower. lower gain allows the ly8210 to operate at its best, for example table 1. typical total gain and a vd values rf (k ? ) 150 150 150 150 150 150 ri (k ? ) 150 75 50 37.5 25 18.75 pre amp. gain 1 2 3 4 6 8 total gain 2 4 6 8 12 16 a vd (db) 6.02 12.04 15.56 18.06 21.58 24.08 input capacitors (ci) the ly8210 using fully differential source, so the input coupling capacitors are requi red. the input capacitors and input resistors form a high-pass filter with the corner frequency(f c ), determined in the equation. fc = 1 / ( 2 ri ci ) the value of the input capacitor is important to cons ider as it directly affects the bass (low frequency) performance of the circuit. speakers in wireless phones cannot usually respond well to low frequencies, so the corner frequency can be set to block low frequencies in this application. equation is reconfigured to solve for the input coupling capacitance. ci = 1 / ( 2 ri fc ) if the corner frequency is within the audio band, the capacitors should have a tolerance of 10% or better, because any mismatch in capacitance causes an im pedance mismatch at the corner frequency and below.
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 16 ? for example in the table 2 shows the external components. rin in connect with cin to create a high-pass filter. table 2. typical component values reference description note ri 150k ? 1% tolerance resistors ci 0.22uf 80%/?20% ci = 1 / ( 2 ri fc) ci = 1 / ( 2 x 150k ? x 4.8hz)=0.221uf use 0.22uf decoupling capacitor (c s ) the ly8210 is a high-performance class-d audio amplif ier that requires adequate power supply decoupling to ensure the efficiency is high and total harmonic distor tion (thd) is low. for higher frequency transients, spikes, or digital hash on the line, a good low equivalent -series-resistance (esr) ceramic capacitor, typically 1.0uf, placed as close as possible to the device v dd lead works best. placing this decoupling capacitor close to the ly8210 is very important for the efficiency of the class-d amplifier, because any resistance or inductance in the trace between the device and the capa citor can cause a loss in efficiency. for filtering lower-frequency noise signals, a 10. 0uf or greater capacitor placed near the audio power amplifier would also help, but it is not required in most applicati ons because of the high psrr of this device. pcb layout all the external components must place very close to the ly8210. the input resistors need to be very close to the ly8210 input pins so noise does not couple on th e high impedance nodes betwee n the input resistors and the input amplifier of the ly8210. then place the deco upling capacitor cs, close to the ly8210 is important for the efficiency of the class-d amplifier. any resist ance or inductance in the trace between the device and the capacitor can cause a loss in efficiency. making the high current traces going to vdd, gnd, v o+ and v o- pins of the ly8210 should be as wide as possible to minimize trace resistance. if these trac es are too thin, the ly8210's performance and output power will decrease. the input traces do not need to be wide, but do need to run side-by-side to enable common-mode noise cancellation.
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 17 ? LY8210CL demo board artwork top silkscreen top layer composite view bottom layer ly8210 v1.1 bom list no. description reference note 1 resistor, 150k ? r1,r2,r3,r4,r5,r6 2 capacitor, 0.1uf c6,c7,c8 3 capacitor, 0.22uf c1,c2,c3,c4 4 capacitor, 10.0uf c5 5 LY8210CL u1 6 1*2 pin header j1,j2 close ? active
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 18 ? ly8210al/il demo board artwork top silkscreen top layer composite view bottom layer ly8210 v1.1 bom list no. description reference note 1 resistor, 150k ? r1,r2,r3,r4,r5,r6 2 capacitor, 0.1uf c6,c7,c8 3 capacitor, 0.22uf c1,c2,c3,c4 4 capacitor, 10.0uf c5 5 ly8210al/il u1 6 1*2 pin header j1,j2 close ? active
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 19 ? package outline dimension 18 ball wcsp package outline dimension
ly8210 rev. 1.7 2.5 w/ch stereo class d audio power amplifier (wcsp/ tssop) lyontek inc. reserves the rights to change the specifications and products without notice. 5f, no. 2, lndustry e . rd. ix, science-ba sed industrial park, hsinchu 300, taiwan tel: 886-3-6668838 fax: 886-3-6668836 20 ? tssop 20 pin package outline dimension

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