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1. general description the tfa9815 is a 2-channel power comparator for high-ef?ciency class d audio ampli?er systems. it contains two full-bridge bridge-tied load (btl) power stages, drive logic, protection control logic and full differential input comparators. by using this power comparator a compact closed-loop self-oscillating digital audio ampli?er system or open-loop system can be built. the continuous output power is 2 17 w in a full-bridge btl application. the tfa9815 does not require a heat sink and operates using an asymmetrical supply voltage. 2. features n stereo full-bridge audio ampli?er for class d applications n no external heat sink required n operating voltage range: asymmetrical from 8 v to 20 v n thermally protected n zero dead-time switching n current-limiting (no audible interruptions) 3. applications n self-oscillating or open-loop class d audio ampli?er applications n flat-panel television sets n flat-panel monitors n multimedia systems n wireless speakers n high-end crt television sets 4. quick reference data tfa9815 stereo full-bridge audio ampli?er 2 x 17 w rev. 01 16 december 2008 preliminary data sheet table 1. quick reference data v p = 12 v; f osc = 550 khz; t amb = 25 c; typical application diagram figure 12 , unless otherwise speci?ed. symbol parameter conditions min typ max unit general v p supply voltage single, asymmetrical supply (v dd -v ss ) 8 1220v i p supply current sleep mode - 110 200 m a
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 2 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 5. ordering information i q(tot) total quiescent current operating mode; no load; no snubbers; no ?lter connected - 4050ma h po output power ef?ciency output power; 2 10 w into 8 w 89 91 - % p o(rms) rms output power v p =15v; r l = 8 w ; thd = 10 % 15 16 - w v p =12v; r l = 8 w ; thd = 10 % 910- w v p =12v; r l = 6 w ; thd=10% 12 13 - w v p =12v; r l = 4 w ; thd=10% 17 18 - w table 1. quick reference data continued v p = 12 v; f osc = 550 khz; t amb = 25 c; typical application diagram figure 12 , unless otherwise speci?ed. symbol parameter conditions min typ max unit table 2. ordering information type number package name description version TFA9815T so32 plastic small outline package; 32 leads; body width 7.5 mm sot287-1
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 3 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 6. block diagram fig 1. tfa9815 block diagram 27 26 25 30 29 28 v ddp1 v ssp1 22 31 boot1p v ddp1 out1p v ssp1 boot1n out1n stab1 boot2p stab1 control logic 23 24 19 driver high 20 21 18 v ddp2 v ssp2 v ddp2 out2p v ssp2 boot2n out2n stab2 stab2 v dda1 in1p in1n v ssa1 v dda2 in2p in2n v ssa2 reference manager protection ovp uvp ocp otp odp wp heatspreader comparator 1 comparator 2 so/ol enable cdelay diag 11 4 2 3 5 10 6 test 7 8 13 15 14 12 1161732 v ssd(hw) 9 n.c. tfa9815 010aaa211 control logic driver high driver low driver low control logic control logic driver high driver low driver high driver low stab1 stab2
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 4 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 7. pinning information 7.1 pinning the so32 package has four corner leads. these leads (1, 16, 17 and 32) are internally connected to the die pad and must be connected to v ssa . together with the applied copper area on the pcb these leads determine the ambient temperature, which affects the thermal resistance of the junction. 7.2 pin description fig 2. pin con?guration tfa9815 so32 v ssd(hw) v ssd(hw) in1p stab1 in1n v ssp1 v dda1 boot1n v ssa1 out1n so/ol boot1p enable out1p cdelay v ddp1 nc v ddp2 diag out2p test boot2p v ssa2 out2n v dda2 boot2n in2n v ssp2 in2p stab2 v ssd(hw) v ssd(hw) 010aaa212 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 18 17 20 19 22 21 24 23 26 25 32 31 30 29 28 27 table 3. pin description symbol pin description v ssd(hw) 1 negative digital supply voltage and handle-wafer connection in1p 2 positive input comparator channel 1 in1n 3 negative input comparator channel 1 v dda1 4 positive analog supply voltage channel 1 v ssa1 5 negative analog supply voltage channel 1 so/ol 6 self-oscillating / open-loop con?guration enable enable 7 enable input to switch between sleep and operating mode cdelay 8 switch on/off timing control n.c. 9 not connected diag 10 diagnostic output; open-drain test 11 test signal input; for testing purposes only v ssa2 12 negative analog supply voltage channel 2 v dda2 13 positive analog supply voltage channel 2 in2n 14 negative input comparator channel 2
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 5 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 8. functional description 8.1 general the tfa9815 is a dual-switching power comparator. it is the main building block for a stereo high-ef?ciency class d audio power ampli?er system. it contains two full-bridge btl power stages, drive logic, protection control logic and full differential input comparators and references (see figure 1 ). by using this power comparator a compact closed-loop self-oscillating digital ampli?er system or open-loop system can be built. a second-order low-pass ?lter converts the pwm output signal into an analog audio signal across the speaker. 8.2 interfacing the pins enable and so/ol control the operating mode of the tfa9815. both the enable and the so/ol pins are referenced to v ssd(hw) . when the so/ol pin is connected to v ssd(hw) the tfa9815 is in self-oscillating con?guration: when the so/ol pin is ?oating the tfa9815 is in open-loop con?guration. under this latter condition the open-pin voltage is typically 4 v applied internally. the test pin needs to be connected to ground in both situations. in2p 15 positive input comparator channel 2 v ssd(hw) 16 negative digital supply voltage and handle-wafer connection v ssd(hw) 17 negative digital supply voltage and handle-wafer connection stab2 18 decoupling of internal 11 v regulator for channel 2 drivers v ssp2 19 negative power supply voltage channel 2 boot2n 20 bootstrap high-side driver negative output channel 2 out2n 21 negative output channel 2 boot2p 22 bootstrap high-side driver positive output channel 2 out2p 23 positive output channel 2 v ddp2 24 positive power supply voltage channel 2 v ddp1 25 positive power supply voltage channel 1 out1p 26 positive output channel 1 boot1p 27 bootstrap high-side driver positive output channel 1 out1n 28 negative output channel 1 boot1n 29 bootstrap high-side driver negative output channel 1 v ssp1 30 negative power supply voltage channel 1 stab1 31 decoupling of internal 11 v regulator for channel 1 drivers v ssd(hw) 32 negative digital supply voltage and handle-wafer connection table 3. pin description continued symbol pin description
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 6 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w the device has two modes: sleep and operating. in sleep mode the tfa9815 is not biased and has a very low supply current. sleep mode can also be used to quickly mute the device. when the tfa9815 is set into operating mode the device is started via the start-up sequence, which provides a pop-free start-up behavior. after start-up the stabn reference voltages are present and the outputs start switching. 8.3 input comparators the input stages have a differential input and are optimized for low noise and offset. this results in maximum ?exibility in the application. operating in self-oscillating con?guration the inputs (in1p, in1n, in2p, in2n) of the comparators are internally set to a voltage level of v p , but only during the start-up sequence. in operating mode the inputs are high-ohmic. operating in open-loop con?guration, no internal voltages are applied to the inputs. the input pins (in1p, in1n, in2p, in2n) are pulled down to v ssa1 and v ssa2 level by internal resistors. 8.4 diagnostic the diag output is an open-drain output. the maximum current is 2 ma. when one of the protections is activated the diag output is set low. the diag output refers to v ssd . table 4. so/ol connections interfacing so/ol connected to: con?guration v ssd(hw) self-oscillating open open-loop table 5. start-up interfacing enable (v) mode enable < 0.8 v sleep mode enable > 3 v operating mode fig 3. timing diagram low diag high protection active 5 m s amplifier restart 010aaa377 t t
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 7 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 8.5 protections the tfa9815 has the following protections: ? overtemperature protection (otp) ? overcurrent protection (ocp) ? overvoltage protection (ovp) ? undervoltage protection (uvp) ? overdissipation protection (odp) ? window protection (wp) when either the otp or the ocp are activated the output power stage is switched off and all the outputs (out1n, out1p, out2n and out2p) become ?oating. the power stage will switch back on after 5 m s or as soon as the fault condition is removed. when any other protection is activated (ovp, uvp, odp, or wp) all the outputs become ?oating and the device shuts down. the tfa9815 will resume operating after the fault condition has been removed, going through the restart sequence shown in figure 3 . restarting will typically take 500 ms, depending on the power-supply voltage level. ? overtemperature protection if the junction temperature (t j ) exceeds a threshold level of about 150 c the outputs become ?oating. the device will start switching again after 5 ms and when the temperature is below 150 c. this thermal limitation is without audible interruptions. ? overcurrent protection if the output current exceeds the maximum output-current threshold level the outputs become ?oating. the device will start switching again after 5 m s. this current limitation is without audible interruptions. ? overvoltage protection if the supply voltage applied to the tfa9815 exceeds the maximum supply-voltage threshold level the device shuts down. the device will resume operating when the supply is within the operating range, going through the restart sequence. ? undervoltage protection if the supply voltage applied to the tfa9815 falls below the minimum supply-voltage threshold level the device shuts down. the device will resume operating when the supply is within the operating range, going through the restart sequence. ? overdissipation protection if the junction temperature (t j ) exceeds 135 c an internal overtemperature warning (otw) signal is generated. if the overcurrent protection is generated while the otw is active the device will shut down and resume operating automatically, going through the restart sequence. ? window protection during start-up, if one of the outputs is shorted to v ss or v dd the device will interrupt the start-up sequence and wait until the short is removed. this is an effective measure to protect the device against shorts between the outputs (before the ?lter) and the ground or supply lines. the wp protects the device against errors made during board assembly.
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 8 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 8.6 timing diagram table 6. overview protections protections symbol condition diag. outputs recovering otp t j > 150 c low floating automatic, after 5 m s and t j < 150 c ocp i o > i orm low floating automatic, after 5 m s ovp v p > 20 v low floating switch-off to restart when v p < 20 v uvp v p < 8 v low floating switch-off to restart when v p > 8 v odp t j > 135 c and i o > i orm low floating switch-off to restart wp outx > v dda - 1 v or outx < v ssa + 1 v low start-up after removing fault condition fig 4. start-up sequence sleep start-up operating fault restart operating shut-down sleep floating audio pwm 010aaa378 audio pwm floating v p enable stab1 cdelay v in x out x audio diag
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 9 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 9. internal circuitry table 7. internal circuitry pin symbol equivalent circuit 1v ssd(hw) 16 v ssd(hw) 17 v ssd(hw) 32 v ssd(hw) 2 in1p 3 in1n 14 in2n 15 in2p 4v dda1 5v ssa1 12 v ssa2 13 v dda2 6 so/ol 22 v v dda v ssa 1,16, 17, 32 010aaa384 hvp v ssa 135 k w 135 k w 5.5 v 5.5 v v ssa1 , v ssa2 v dda1 , v dda2 2, 14 3, 15 010aaa385 22 v 4, 12 5, 13 010aaa386 110 k w 6 v ssa 010aaa381 v dda1 v ssa1 v dda1 50 m a
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 10 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 7 enable 8 cdelay 10 diag 11 test table 7. internal circuitry continued pin symbol equivalent circuit 3 k w v ssa 250 na 7 v dda1 010aaa387 8 v dda1 discharge v ssa1 010aaa379 2.8 m a 200 na 2.8 k w v dda1 v ssa1 v ssd 10 010aaa030 v dda1 v ssa1 11 010aaa031 13 k w 9 v
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 11 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 18 stab2 31 stab1 19 v ssp2 24 v ddp2 25 v ddp1 30 v ssp1 20 boot2n 29 boot1n 21 out2n 23 out2p 26 out1p 28 out1n 22 boot2p 27 boot1p table 7. internal circuitry continued pin symbol equivalent circuit v ssd 50 ma 18, 31 v dda1 , v dda2 12 v 010aaa445 19, 30 24, 25 23.5 v 010aaa446 12 v out2n, out1n 20, 29 010aaa447 v ddp1 , v ddp2 21, 23, 26, 28 v ssp1 , v ssp2 010aaa380 12 v out2p 22, 27 010aaa448
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 12 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 10. limiting values [1] human-body model (hbm): r s = 1500 w ; c = 100 pf; for pins 2, 3, 14, and 15: v esd = 1500 v. [2] machine model (mm): r s = 0 w ; c = 200 pf; l = 0.75 m h. 11. thermal characteristics [1] measured in a jedec high k-factor test board (standard eia/jesd 51-7) in free air with natural convection. [2] two-layer application board (70 mm x 57 mm), 35 m m copper, fr4 base material in free air with natural convection. [3] strongly depends on where the measurement is taken on the package. table 8. limiting values in accordance with the absolute maximum rating system (iec 60134). symbol parameter conditions min max unit v p supply voltage asymmetrical - 0.3 +23.1 v i orm repetitive peak output current -3-a t j junction temperature - - 180 c t stg storage temperature - - 55 +150 c t amb ambient temperature - - 40 +85 c p max maximum power dissipation --5w v x voltage on pin x diag v ss - 0.3 12 v in1p - in1n - 6+6v in2p - in2n - 6+6v all other pins v ss - 0.3 v dd + 0.3 v v esd electrostatic discharge voltage hbm [1] - 2000 +2000 v mm [2] - 200 +200 v table 9. characteristics symbol parameter conditions min typ max unit r th(j-a) thermal resistance from junction to ambient jedec test board [1] - 3942k/w two-layer application board [2] - 42 - k/w y j-lead thermal characterization parameter from junction to lead - --30k/w y j-top thermal characterization parameter from junction to top of package - [3] --8k/w
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 13 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 12. characteristics 12.1 static characteristics table 10. characteristics v p = 12 v;t amb = 25 ?c; f osc = 550 khz; typical application diagram figure 12 , unless otherwise speci?ed. symbol parameter conditions min typ max unit supply voltage v p supply voltage single asymmetrical supply (v dd - v ss ) 81220v i p supply current sleep mode - 110 200 m a i q(tot) total quiescent current operating mode; no load, no snubbers and no ?lter connected -4050ma series resistance output power switches r dson drain-source on-state resistance t j = 25 c - 150 220 m w enable input: pin enable [1] v il low-level input voltage sleep mode - - 0.8 v v ih high-level input voltage operating mode 3 - v p v i i input current v i = 5 v - 1 20 m a so/ol input: pin so/ol [1] v il low-level input voltage self-oscillating con?guration 0 - 0.4 v v ih high-level input voltage open-loop con?guration 3 4 5 v stabilizer output pins stab1 and stab2 v o output voltage operating mode [1] 10.2 11 11.7 v comparator full-differential input stage v offset(i)(eq) equivalent input offset voltage - - - 1 mv v n(i)(eq) equivalent input noise voltage 20 hz < f < 20 khz - - 15 m v v i(cm) common-mode input voltage - v ssa + 3 - v dda - 1 v i ib input bias current - - - 1 m a overtemperature protection t act(th_prot) thermal protection activation temperature - 150 - 180 c overvoltage protection v th(ovp) overvoltage protection threshold voltage level internal ?xed 20.1 21.5 23 v undervoltage protection v p(uvp) undervoltage protection supply voltage level internal ?xed 7 7.5 7.9 v overcurrent protection i o(ocp) overcurrent protection output current - [2] 3 3.5 - a
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 14 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w [1] measured with respect to v ssd . [2] current limiting concept: in overcurrent condition no interruption of the audio signal in case of impedance drop. 12.2 dynamic characteristics 12.3 ac characteristics measured in typical application [1] thd+n is measured in a bandwidth of 20 hz to 20 khz, aes17, brick-wall. [2] minimum value determined by r5, r10, r17, r22 equalling +1 % and r7, r14, r18, r20 equalling - 1 %. window protection (wp) v o output voltage high-level - v dda - 1- v low-level - v ssa + 1 - v table 10. characteristics continued v p = 12 v;t amb = 25 ?c; f osc = 550 khz; typical application diagram figure 12 , unless otherwise speci?ed. symbol parameter conditions min typ max unit table 11. switching characteristics v p = 12 v;t amb = 25 ?c; f osc = 550 khz unless otherwise speci?ed. symbol parameter conditions min typ max unit timing pwm output: pins out1 and out2 t r rise time i o = 0 a - 10 - ns t f fall time i o = 0 a - 10 - ns t w(min) minimum pulse width i o = 0 a - 60 - ns table 12. ac characteristics measured in typical application symbol parameter conditions min typ max unit p o(rms) rms output power v p = 15 v; r l = 8 w ; thd = 10 % 15 16 - w v p = 12 v; r l = 8 w ; thd = 10 % 9 10 - w v p = 12 v; r l = 6 w ; thd = 10 % 12 13 - w v p = 12 v; r l = 4 w ; thd = 10 % 17 18 - w thd+n total harmonic distortion-plus-noise p o = 1 w; f i = 1 khz [1] - 0.05 0.1 % h po output power ef?ciency p o = 2 10 w at 8 w 89 91 - % p o = 2 18 w at 4 w 88 90 - % g v(cl) closed-loop voltage gain v i = 100 mv (rms); f i = 1 khz 18.6 19.3 21 db v n(o) output noise voltage inputs shorted; aes17 brick-wall - 150 - m v s/n signal-to-noise ratio v o = 10 v (rms); g v(cl) = 20 db 94 96 - db svrr supply voltage ripple rejection operating mode; f i = 1 khz [2] 34 45 - db a cs channel separation p o = 1 w; f i = 1 khz 55 70 - db
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 15 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 13. application information 13.1 output power estimation for btl con?guration the output power can be estimated using equation 1 : (1) where, ? v p = supply voltage [v] ? r l = load impedance [ w ] ? r dson = on resistance power switch [ w ] ? r s = series resistance output inductor [ w ] the output power at 10% thd can be estimated by using equation 2 (2) figure 5 and figure 6 below show the estimated output power at thd = 0.5 % and thd = 10 % as a function of the blt supply voltage for different load impedances. thd+n = 0.5 % f = 1 khz (1) 4 w (2) 6 w (3) 8 w fig 5. btl output power as function of supply voltage: thd = 1 % p o 1% r l r l 2 + r dson r s + () ------------------------------------------------------ v p 2 2r l --------------------------------------------------------------------------------- = p o 10% 1.25 p o 0.5% = v p (v) 8 20 16 12 10 18 14 010aaa449 20 10 30 40 p o (w) 0 3 2 1
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 16 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 13.2 output current limiting the maximum peak output current is limited by the level of the overcurrent protection threshold. during normal operation the output current should not exceed this threshold level of 3 a otherwise the ocp will be triggered and the device will stop switching for 5 m s. the peak output current in btl can be estimated using the following equation: where: ? v p = supply voltage [v] ? r l = load impedance [ w ] ? r dson = on resistance power switch [ w ] ? r s = series resistance output inductor [ w ] 13.3 speaker con?guration and impedance for a ?at-frequency response (second-order butterworth ?lter) it is necessary to change the low-pass ?lter components llc and clc according to the speaker con?guration and impedance. t ab le 13 shows the practical required values: thd+n = 10 % f = 1 khz (1) r l = 4 w (2) r l = 6 w (3) r l = 8 w fig 6. btl output power as function of supply voltage: thd = 10 % v p (v) 8 20 16 12 10 18 14 010aaa450 20 10 30 40 p o (w) 0 1 3 2 i o max v p r l 2r dson r s + () + ------------------------------------------------------ 3a
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 17 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 13.4 differential input for a high common-mode rejection ratio and a maximum of ?exibility in the application, the audio inputs of the application are fully differential. the input con?guration for a differential-input application is illustrated in figure 7 . 13.5 single-ended input when using an audio source with a single-ended out, it is important to connect the in1n from the application board to the v ss of the audio source (e.g. audio digital signal processing (audio dsp)). the input con?guration for a single-ended in application is illustrated in figure 8 . table 13. filter component values con?guration impedance ( w ) llc ( m h) clc (nf) btl 4 10 1500 6 15 1000 8 22 680 fig 7. input con?guration for a differential input in1 audio dsp out1p out1n 010aaa382 + + - v ss -
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 18 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 13.6 curves measured in a typical application fig 8. input con?guration for a single-ended input in1p in1n audio dsp out1p out1n 010aaa383 + - vss v p = 12 v; r l = 4 w ; v i = 300 mv (rms) fig 9. gain as a function of frequency 010aaa451 f i (hz) 10 10 5 10 4 10 2 10 3 18 14 22 26 g v (db) 10
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 19 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 13.7 typical application diagram tfa9815 a typical application diagram with the tfa9815 supplied from an asymmetrical supply is shown in figure 12 . v p = 12 v; r l = 4 w (1) p o = 1 w (2) p o = 10 w fig 10. total harmonic distortion + noise as a function of frequency v p = 12 v; r l = 4 w ; f = 1 khz (1) 6 khz (2) 1 khz (3) 100 hz fig 11. total harmonic distortion as a function of output power 010aaa452 10 - 1 10 - 2 10 1 10 2 thd+n (%) 10 - 3 f i (hz) 10 10 5 10 4 10 2 10 3 1 2 010aaa453 10 - 1 10 - 2 10 1 10 2 thd+n (%) 10 - 3 p o (w) 10 - 2 10 2 10 10 - 1 1 1 3 2
xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxx x x x xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xx xx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxx xxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxx x x xxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxx xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxx xxxxxxxxxxxxxxxxxxxxxxxxx xxxxxxxxxxxxxxxxxxxx xxx tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 20 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w fig 12. typical application diagram tfa9815 v dda1 n.c in1p in1n cdelay so/ol in2p in2n out1p boot1p boot1n out1n stab1 stab2 out2p boot2p boot2n out2n v ssa1 v ssa2 v ssd v ssd v ssd v ssd v ssp1 v ssp2 v dda2 v ddp1 v ddp2 010aaa454 c12 680 nf c27 470 pf c13 680 nf c28 470 pf gnd gnd 2 1 j3 out1 c9 220 nf c14 220 nf r27 10 w r28 10 w c20 680 nf c29 470 pf c23 680 nf c30 470 pf gnd gnd 2 1 j6 out2 c19 220 nf c25 220 nf r29 10 w r30 10 w l3 22 m h l4 22 m h l5 22 m h l6 22 m h c16 1 m f c17 1 m f gnd gnd 26 27 29 28 31 18 23 22 21 20 out1+ out1 - out2+ out2 - c31 100 nf c1 220 m f c3 100 nf c4 100 nf c2 220 m f c5 100 nf gnd gnd gnd r3 10 w l2 bead l1 bead 12 v c8 220 pf r6 10 k w c6 1 m f r7 10 k w r10 10 k w gnd r11 10 k w c11 47 pf gnd 1 2 j4 c21 220 pf r19 10 k w r17 100 k w c18 1 m f c26 1 m f r18 10 k w r22 10 k w gnd r23 10 k w c22 68 pf out2 - stab1 gnd 1 2 j7 c15 4.7 m f gnd c24 220 pf c10 220 pf enable diag v dda2 4 13 9 25 24 5 12 1 16 17 32 30 19 gnd vp j1 gnd 1 2 c32 220 m f c33 100 nf 12 v 12 v sw1 enable 2 3 8 6 7 10 11 15 14 in1 j2 tfa9815 r32 10 k w r31 10 k w c7 1 m f r26 100 k w out2+ r5 100 k w out1 - r14 100 k w out1+ r33 10 k w r34 10 k w in2 j5 r35 200 k w gnd snubber network (optional) r100 22 w
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 21 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 13.8 typical application: bill of materials remark: the power supply requires at least a 1000 m f capacitor. table 14. typical application: bill of materials item quantity reference part footprint 1 2 c1, c2. 220 mf/35 v ce09-02r 2 5 c3, c4, c5, c31, c33. 100 nf/50 v smd 0805 x7r 3 2 c16, c17. 1 mf/50 v smd 1206 x7r 4 4 c6, c7, c18, c26 1 mf/25 v mkt 5 4 c8, c10, c21, c24. 220 pf/25 v smd 0402 np0 6 4 c9, c14, c19, c25. 220 nf/25 v smd 0805 x7r 7 1 c11 47 pf/25 v smd 0402 np0 8 4 c12, c13, c20, c23. 680 nf/25 v mkt 9 1 c22. 68 pf/25 v smd 0402 np0 10 3 j1, j3, j6. con2 2 pins terminal 11 2 j2, j5. cinch cinch 12 2 j4, j7 jumper closed on demo board only 13 2 l1, l2 bead smd 1206 wrth elektronik dc < 0.5 w 10 mhz > 80 w 14 1 r35 200 k w / 0.1 w / 5 % smd 0603 15 1 c15 4.7 m f / 16 v 16 4 l3, l4, l5, l6. 22 m h 8rdy toko a7040hn-220m, 11rhbp toko a7503cy-220m or sagami 7311na-220m 17 5 r3 10 / 0.25 w / 5% smd 1206 18 4 r5, r14, r17, r26. 100 k w / 0.1w/1% for 20 db 200 k / 0.1w/1% for 26 db smd 0603 19 12 r6, r7, r10, r11, r18, r19, r22, r23, r31, r32, r33, r34. 10 k w /0.1w/1% smd 0603 20 1 r100 22 w / 5 % / 0.1 w smd 0603 21 1 sw1 sc 1x1 secme 090320901 22 1 u1 TFA9815T sot287-1 (so32) nxp semiconductors
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 22 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w table 15. snubber network: bill of materials item quantity reference part footprint 1 4 c27, c28, c29, c30 470 pf, 25 v smd 0805 x7r 2 4 r27, r28, r29, r30 10 / 0.25 w / 5% smd 1206
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 23 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 14. package outline fig 13. package outline sot287-1 (so32) unit a max. a 1 a 2 a 3 b p cd (1) e (1) eh e ll p qz y w v q references outline version european projection issue date iec jedec jeita mm inches 2.65 0.1 0.25 0.01 1.4 0.055 0.3 0.1 2.45 2.25 0.49 0.36 0.27 0.18 20.7 20.3 7.6 7.4 1.27 10.65 10.00 1.2 1.0 0.95 0.55 8 0 o o 0.25 0.1 0.004 0.25 dimensions (inch dimensions are derived from the original mm dimensions) note 1. plastic or metal protrusions of 0.15 mm (0.006 inch) maximum per side are not included. 1.1 0.4 sot287-1 mo-119 (1) 0.012 0.004 0.096 0.089 0.02 0.01 0.05 0.047 0.039 0.419 0.394 0.30 0.29 0.81 0.80 0.011 0.007 0.037 0.022 0.01 0.01 0.043 0.016 w m b p d h e z e c v m a x a y 32 17 16 1 q a a 1 a 2 l p q detail x l (a ) 3 e pin 1 index 0 5 10 mm scale so32: plastic small outline package; 32 leads; body width 7.5 mm sot287-1 00-08-17 03-02-19
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 24 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 15. revision history table 16. revision history document id release date data sheet status change notice supersedes tfa9815_1 20081216 preliminary data sheet - -
tfa9815_1 ? nxp b.v. 2008. all rights reserved. preliminary data sheet rev. 01 16 december 2008 25 of 26 nxp semiconductors tfa9815 audio ampli?er 2 x 17 w 16. legal information 16.1 data sheet status [1] please consult the most recently issued document before initiating or completing a design. [2] the term short data sheet is explained in section de?nitions. [3] the product status of device(s) described in this document may have changed since this document was published and may differ in case of multiple dev ices. the latest product status information is available on the internet at url http://www .nxp .com . 16.2 de?nitions draft the document is a draft version only. the content is still under internal review and subject to formal approval, which may result in modi?cations or additions. nxp semiconductors does not give any representations or warranties as to the accuracy or completeness of information included herein and shall have no liability for the consequences of use of such information. short data sheet a short data sheet is an extract from a full data sheet with the same product type number(s) and title. a short data sheet is intended for quick reference only and should not be relied upon to contain detailed and full information. for detailed and full information see the relevant full data sheet, which is available on request via the local nxp semiconductors sales of?ce. in case of any inconsistency or con?ict with the short data sheet, the full data sheet shall prevail. 16.3 disclaimers general information in this document is believed to be accurate and reliable. however, nxp semiconductors does not give any representations or warranties, expressed or implied, as to the accuracy or completeness of such information and shall have no liability for the consequences of use of such information. right to make changes nxp semiconductors reserves the right to make changes to information published in this document, including without limitation speci?cations and product descriptions, at any time and without notice. this document supersedes and replaces all information supplied prior to the publication hereof. suitability for use nxp semiconductors products are not designed, authorized or warranted to be suitable for use in medical, military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an nxp semiconductors product can reasonably be expected to result in personal injury, death or severe property or environmental damage. nxp semiconductors accepts no liability for inclusion and/or use of nxp semiconductors products in such equipment or applications and therefore such inclusion and/or use is at the customers own risk. applications applications that are described herein for any of these products are for illustrative purposes only. nxp semiconductors makes no representation or warranty that such applications will be suitable for the speci?ed use without further testing or modi?cation. quick reference data the quick reference data is an extract of the product data given in the limiting values and characteristics sections of this document, and as such is not complete, exhaustive or legally binding. limiting values stress above one or more limiting values (as de?ned in the absolute maximum ratings system of iec 60134) may cause permanent damage to the device. limiting values are stress ratings only and operation of the device at these or any other conditions above those given in the characteristics sections of this document is not implied. exposure to limiting values for extended periods may affect device reliability. terms and conditions of sale nxp semiconductors products are sold subject to the general terms and conditions of commercial sale, as published at http://www .nxp .com/pro? le/ter ms , including those pertaining to warranty, intellectual property rights infringement and limitation of liability, unless explicitly otherwise agreed to in writing by nxp semiconductors. in case of any inconsistency or con?ict between information in this document and such terms and conditions, the latter will prevail. no offer to sell or license nothing in this document may be interpreted or construed as an offer to sell products that is open for acceptance or the grant, conveyance or implication of any license under any copyrights, patents or other industrial or intellectual property rights. 16.4 trademarks notice: all referenced brands, product names, service names and trademarks are the property of their respective owners. 17. contact information for more information, please visit: http://www .nxp.com for sales of?ce addresses, please send an email to: salesad dresses@nxp.com document status [1] [2] product status [3] de?nition objective [short] data sheet development this document contains data from the objective speci?cation for product development. preliminary [short] data sheet quali?cation this document contains data from the preliminary speci?cation. product [short] data sheet production this document contains the product speci?cation.
nxp semiconductors tfa9815 audio ampli?er 2 x 17 w ? nxp b.v. 2008. all rights reserved. for more information, please visit: http://www.nxp.com for sales office addresses, please send an email to: salesaddresses@nxp.com date of release: 16 december 2008 document identifier: tfa9815_1 please be aware that important notices concerning this document and the product(s) described herein, have been included in section legal information. 18. contents 1 general description . . . . . . . . . . . . . . . . . . . . . . 1 2 features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 3 applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 4 quick reference data . . . . . . . . . . . . . . . . . . . . . 1 5 ordering information . . . . . . . . . . . . . . . . . . . . . 2 6 block diagram . . . . . . . . . . . . . . . . . . . . . . . . . . 3 7 pinning information . . . . . . . . . . . . . . . . . . . . . . 4 7.1 pinning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 7.2 pin description . . . . . . . . . . . . . . . . . . . . . . . . . 4 8 functional description . . . . . . . . . . . . . . . . . . . 5 8.1 general . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.2 interfacing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 8.3 input comparators. . . . . . . . . . . . . . . . . . . . . . . 6 8.4 diagnostic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 8.5 protections . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 8.6 timing diagram . . . . . . . . . . . . . . . . . . . . . . . . . 8 9 internal circuitry. . . . . . . . . . . . . . . . . . . . . . . . . 9 10 limiting values. . . . . . . . . . . . . . . . . . . . . . . . . 12 11 thermal characteristics. . . . . . . . . . . . . . . . . . 12 12 characteristics . . . . . . . . . . . . . . . . . . . . . . . . . 13 12.1 static characteristics. . . . . . . . . . . . . . . . . . . . 13 12.2 dynamic characteristics . . . . . . . . . . . . . . . . . 14 12.3 ac characteristics measured in typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 13 application information. . . . . . . . . . . . . . . . . . 15 13.1 output power estimation. . . . . . . . . . . . . . . . . 15 13.2 output current limiting. . . . . . . . . . . . . . . . . . . 16 13.3 speaker con?guration and impedance . . . . . . 16 13.4 differential input . . . . . . . . . . . . . . . . . . . . . . . 17 13.5 single-ended input . . . . . . . . . . . . . . . . . . . . . 17 13.6 curves measured in a typical application . . . . 18 13.7 typical application diagram tfa9815 . . . . . . . 19 13.8 typical application: bill of materials. . . . . . . . . 21 14 package outline . . . . . . . . . . . . . . . . . . . . . . . . 23 15 revision history . . . . . . . . . . . . . . . . . . . . . . . . 24 16 legal information. . . . . . . . . . . . . . . . . . . . . . . 25 16.1 data sheet status . . . . . . . . . . . . . . . . . . . . . . 25 16.2 de?nitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 16.3 disclaimers . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 16.4 trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 17 contact information. . . . . . . . . . . . . . . . . . . . . 25 18 contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26

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