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S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -1- data sheet (rev. 1.0) for S1A0071 audio processor for class-d power amp digital & analog co., ltd.
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -2- content 1. introduction .................................................................................................... 3 2. block di agram................................................................................................. 4 3 absolute maximum ratings.......................................................................... 4 4. pin description ................................................................................................ 5 5. electric ch arateristics ............................................................................. 7 6. typical performance ................................................................................... 8 7. test circuit..................................................................................................... 13 8. application circuit ...................................................................................... 14 9. application note........................................................................................... 15 10. package dimensions .................................................................................. 20
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -3- 1. introduction the S1A0071 is an audio processor for class d-type audio amplifier, will help you to make more easier the class d type audio amplifier and sound system. this is designed by the cool power processing (cpp tm ) technology. the cpp have a characteristic of high fidelity and high power efficiency. overview sound processing : cpptm (cool power processing) class-d architecture audio sound processor : voltage amp, current amp, and feed back amp system support circuit : protection, mute, digital logic high speed comparator, logic buffer include feature for audio power amplifier operating voltage ( driver supply ) : 5.0v ~ 6.0v external mosfet supply voltage range : 10v ~ 45v usable wide output power compatibility : 10w ~ 200w high fidelity : 10w @ 4 , 0.01% thd+n 5w @ 8 , 0.008% thd+n high efficiency : 83% @ 70w, 4 , thd+n < 10%,vccp= 25v : 91% @ 40w, 8 , thd+n < 10%,vccp= 25v wide bandwidth : 1 ~ 80khz @ 8 dynamic range : 105db @ 100w amp damping factor : more than 300 output noise voltage : 120 v @ aes17, a-weighted filter, input grounded very low pop noise when power on/off mute function without pop noise enable to set output soft clipping level enable to set p-mos & n-mos on-time delay independently protections: internal thermal protection output over current protection output short protection (output to vccp, output to gnd, output to vssp) protection operating monitor output pin: direct led drive enable 48tssop package
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -4- 2. block diagram 3 absolute maximum ratings symbol parameter value units v cc , v ss driver supply voltage 7.5 v tstg storage temperature ?55 to 150 c topr operating temperature ?25 to 75 c electro-static discharge human body model, all pin 2000 v machine model, all pin 200 v electric over stress all pin 16 v pd power dissipation 1000 mw
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -5- 4. pin description no. name i/o description 1 opt i active high. if it is high, pwm output is activated after power on mute time, t m . otherwise (default = high) 2 oscen i triangle wave generator enable input 3 sio b triangle wave i/o 4 mu? i mute control input. it is also used for external protection. active low. low state is muted state. 5 vd o logic power supply pin (internal generated) 6,7,8,9 cx_l b l-channel amp capacitor connected pin for phase & gain 10 vo_l o l-channel pre-amp output pin for gain setting 11 vin_l i l-channel pre-amp input pin 12 gnd_a p l-channel sound ground 13 gnd_a p r-channel sound ground 14 vin_r i r-channel pre-amp input pin 15 vo_r o r-channel pre-amp output pin for gain setting 16,17,18,19 cx_r b r-channel amp capacitor connected pin for phase & gain 20 pdctr i p-mos gate delay setting pin 21 ndctr i n-mos gate delay setting pin 22 vb o regulated voltage output pin for internal current bias 23 vc i triangle wave magnitude setting input 24 cdly i time delay capacitor pin for internal use 25 vss p negative power supply pin 26 vln i soft clipping low level input 27 cf2_r i r-channel current feed back input 2 28 cf1_r i r-channel current feed back input 1 29 vf_r i r-channel voltage feed back input 30 gnd_ch p control block ground 31 gnd_a p reference block ground 32 pdsens i power down detection 33 vpsens i the operating voltage detection pin of the external mosfet. when its function is not used, this pin must be tied to vcc and about 0.1uf is connected to gnd 34 no_r o r-channel n-mos switching output (pwm) 35 po_r o r-channel p-mos switching output (pwm) 36 ns3 - nc (test pin for evaluation) 37 ns2 - nc (test pin for evaluation) 38 po_l o l-channel p-mos switching output (pwm) 39 no_l o l-channel n-mos switching output (pwm)
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -6- pin description (continued) no. name i/o description 40 ns1 - nc (test pin for evaluation) 41 ns0 - nc (test pin for evaluation) 42 reset i logic reset input 43 pmon o protection monitor output 44 vf_l i l-channel voltage feed back input 45 cf2_l i l-channel current feed back input 2 46 cf1_l i l-channel current feed back input 1 47 vlp i soft clipping high level input 48 vcc p positive power supply pin * i: input, o: output, b: bi-directional, p: power supply, - : no connection.
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -7- 5. electric charateristics electrical characteristics ta = 25 c, vi = 0.3vrms, f = 1khz, vcc = 5v, vss = -5v, r l = 4 , vc = 1.0v, power supply voltage (vccp, vssp) = 30v characteristic symbol condition value unit min. typ. max. supply current icc vi = 0 35 ma driver rising time tr cl = 10pf 20 nsec driver falling time tf cl = 10pf 20 nsec pgate on time delay tdp cl = 10pf 20 nsec ngate on time delay tdn cl = 10pf 20 nsec driver low level vgl isink = 100ua, dc - -4.5 -4.0 v driver high level vgh ipush = 100ua, dc -1.0 -0.5 - v input limiting voltage vlim v lp = 1.5v, v ln = -1.5v 2.8 3.0 3.2 vp-p oscillation frequency fosc - 360 450 540 khz oscillation level vosc vc = 1.0v 2.0 2.2 2.4 vp-p oscen conversion voltage vto - 1.0 1.5 2.2 v mu? conversion voltage vtm - 1.2 1.6 2.0 v pmon "l" level vpmon rmon = 470 - - 0.4 v circuit bias voltage vb - 2.8 3.0 3.2 v logic supply voltage vd - -1.2 -0.8 -0.2 v audio amp gain gp1 f = 1khz.closed loop -0.5 -2.5 -4.5 db gp2 f = 450khz, open loop 9.0 12.0 15.0 db total voltage gain gv vi = 0.1vrms, f = 1khz 24.0 26.0 28.0 db channel balance cb vi = 0.1vrms, f = 1khz -1.0 0 1.0 db ripple rejection ratio rr vr = 0.2vp-p, f = 120hz - - -70 db output offset voltage vofs vi = 0 - - 0.1 v maximum output pomax1 thd = 1%, r l = 4hm 75.2 w pomax2 thd = 1%, r l = 8ohm 43.5 w total harmonic distortion thd1 po = 10w, rl = 4ohm - 0.030 % thd2 po = 50w, rl = 4ohm - 0.062 % thd3 po = 5.0w, rl = 8ohm - 0.025 % thd4 po = 25w ,rl = 8ohm - 0.026 % output noise voltage vno vi = 0 0vrms - 160 uvrms channel cross talk ct vi = 0.3vrms - - -80 db mute damp ratio rmute vi = 0.8vrms - - -110 db over current detect voltage voc - 0.70 0.96 1.20 v
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -8- 6. typical performance from the above measure data, the user can make an audio amplifier system with S1A0071 for several conditions. for example, if user want to make a class d type audio amplifier with specification like as 0.1% 50w system and load impedance 4 . user just setup the power supply and small quality of resistor and capacitor, fet drive and fet switch for this, and you can make a 0.1% 50w 2channel as faster and easily. if you want to make a audio amplifier like as thd+n <1%, 200w 2channel system, user can get the system quickly. also user can make a 5.1channel with S1A0071 3ea as easily. vccp = 25v vcc = 5v f = 1khz bw = 22hz~ 20khz r l = 4 aes 17filter drivers power supply voltage & out pow 25v 30v 35v 40v 45v vccp = 30v vcc = 5v f = 1khz bw = 22hz~ 20khz r l = 4 aes 17filter vccp d 35v vcc = 5v f =1khz bw = 22hz~ 20khz r l =4 aes 17filter vccp d 40v vcc = 5v f =1khz bw = 22hz~ 20khz r l =4 aes 17filter vccp = 45v vcc = 5v f = 1khz bw = 22hz~ 20khz r l = 4 aes 17filter
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -9- typical performance vccp = 25v vcc = 5v f = 1khz bw = 22hz ~ 20khz r l = 4 aes 17filter vccp d 25v vcc = 5v f = 1khz bw = 22hz 20khz r l =8 aes 17filter vccp = 25v vcc = 5v po = 1w bw = 22hz ~ 22khz r l = 4 vccp d 25v vcc = 5v po =1w bw = 22hz 22khz r l =8
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -10- typical performance vccp = 25v vcc = 5v po = 10w r l = 4 vccp d 25v vcc = 5v po =5w r l =8 vccp = 25v vcc = 5v po = 10w 19khz, 20khz 1 : 1 bw = 22hz ~ 22khz 0dbr = 17v r l = 4 vccp d 25v vcc = 5v po =5w 19khz, 20khz 1 : 1 bw = 22hz ~ 22khz 0dbr = 17v bw = 22hz ~ 22khz bw = 22hz ~ 30khz bw = 22hz ~ 22khz bw = 22hz ~ 30khz
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -11- typical performance vccp = 25v vcc = 5v po = 1w f = 1khz bw = 22hz ~ 22khz 0dbr = 17v r l = 4 vccp = 25v vcc = 5v po = 1w f = 1khz bw = 22hz~ 22khz 0dbr = 17v r l = 8 vccp d 25v vcc = 5v po =5w f = 1khz bw = 22hz~ 22khz 0dbr = 17v r l = 8 vccp d 25v vcc = 5v po = 10w f = 1khz bw = 22hz ~ 22khz 0dbr = 17v r l =4
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -12- typical performance vccp = 25v vcc = 5v po = 0w bw = 22hz~ 22khz 0dbr = 17v r l = 4 vccp d 25v vcc = 5v bw = 22hz~ 22khz 0dbr = 17v vccp = 25v vcc = 5v aes 17filter thd+n < 10% r l = 4 ? r l = 8 ? po = 10w, rl = 4 po = 5w, rl = 8 vccp = 25v vcc = 5v po = 0w bw = 22hz~22khz r l =4 psrr - psrr +
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -13- 7. test circuit
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -14- 8. application circuit
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -15- 9. application note note 1 the opt [active high] controls the power on mute function [referred to note 7]. user can prevent the unstable operation by using this pin and use can use this signal to prevent the pop noise during the power-on time. note 2 the oscen pin controls the direction of osc pin because osc has a bidirectional operation. the S1A0071 has a built-in triangle oscillator, so user can selectable to use the internal oscillator or external oscillator. if user wants to internal oscillator, the oscen pin connects to vcc then osc is output port and used to detect the internal oscillation waveform. if user want to make an amplifier with three or more channels set, at this case, user muse be careful to make a system, specially the setting of oscillator frequency, because when user can use the each independent internal oscillators configuration, the system can be generated from mixed modulation resulting from the frequency deviation between oscillators in each chip, respectively. in such case, the oscillator in one of the ic?s must be master, shared with the other ic?s oscillator signal, and the oscillator in the other ic?s must disabled by the use of the oscen pin (slave mode). then, the oscen pin of master ics is connected to vcc (or open) and the oscen pin of the other ic (slaves) must be grounded (gnd), and the sio pins must be connected to each other. as you can see the figure 1, the oscillator signal of the master ic provides the triangle wave to the slave ics. oscen sio ic1 vcc oscen sio ic4 oscen sio ic3 figure 1. multi chip application note 3 mu? pin controls the switching operation of mosfet [active low]. when mute pin is low, the po_r, no_r, po_r and no_r signal go to low level so the mosfet operation is stop. sound is not heard any more. this operation can be use as protection condition. so mu? pin is also used for external protection. S1A0071 has internal protection circuit. however, if user want to add a special protection circuit to the set, the output of the added circuit which is active low is directed to the mu? pin (pin4), which then stops the buffer output.
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -16- note 4 the internal gain of S1A0071 is 26db. (condition: r1 = r2) when user wants to get a high gain system, user can do this by changing the values of r1 and r2. in this case, the total gain can be obtained as follows: 26 1 2 20 ) ( + = r r log db gaintotal if the values of r1 and r2 are very high, it will expect the dc offset and if the values of r1 and r2 are very low, then the thd+n value is high on high power system. by an appropriate r1 and r2 selection, you can minimize the dc offset and get the good the thd+n characteristics. note 5 in the application circuit, the resistor rp connected to the pdctr and the resistor rn connected to ndctr pins. user can adjust these resistors values to control the on time delays of p-mosfet and n-mosfet. because there is a turn-on delay time and rising time and falling time, turn-off delay time of each mosfet drive, so user must set the on time delay for each p-mosfet and n-mosfet to prevent arm-short situation. also more important, the rp and rn selection affect the sound quality and amplifier efficiency, so user should be select appropriate value. designed rule of S1A0071, the gate off time minimized and the on time can be variable so that user can set the overlap time externally. the pdctr pin and ndctr pin voltages are generally set to that of vb (pin 22) and the flowing current, controlled by the values of rp and rn connected externally, can be used to delay the internal gate on time. the recommended current range is 10kohm to 200kohm, from which one can select the appropriate current according to the selected output mosfet and circuit configuration. as the resistances increase, on time is further delayed. rp and rn can set the on time delays of p- mosfet and n-mosfet, respectively. pmos gate drive output (po) nmos gate drive output(no) tdpo tdno tdpo tdno figure 2. gate driver on time delay
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -17- rp,rn & dead-time 0 20 40 60 80 100 120 140 160 40 60 80 100 120 140 160 180 200 220 240 rp&rn (k?) dead-time[ns] note 6 the vc ( dc voltage of carrier frequency) sets the oscillation level of the triangle oscillator. the internal oscillation frequency is set to about 450khz, independent of the oscillation level, an important factor that sets the conversion gain from the internal comparator to the speaker. based on the input vc, the oscillation level is set to approximately vc (vp-p), and can be monitored at the sio (pin3). it is acceptable to make vc voltage from the external voltage source; however, we recommend making the vc voltage from the regulated voltage vb (pin22) divided by ra and rb. if vc is used with the capacitor to prevent noise input, a circuit with better characteristics can be configured. ) ( 2 ) ( rb ra rb vb v vc p p + = ? : v b = 3.05v with vcc = 5v, vss = -5v to get the high thd characteristics, the gain of S1A0071 is designed as 26db and the application circuit use the 30v for main power and the 0.8v for vc. the ratio of main power divide vc relate a amplifier gain, so if user want to get the high power and increase the main power, then user must re-setup the vc values. we recommended as below value for user's application. vccp, vssp 20v 30v 45v ra 22k ? 22k ? 22k ? rb 5.6k ? 8.2k ? 15k ?
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -18- note 7 when power is turned on, the circuit operates unstably, possibl y generating noise. to prevent this unstable situation, the S1A0071 use the cdly pin (pin# 24) , which can be connected to a capacitor. this cdly pin used to generate a slight time delay f rom power up to when the circuit starts to operate normally. the cdly pin drive ? s capacity is about 1.0? and the mute mode sustains until the externally connected capacitor charges to a voltage equal about vb (pin 22). the time delay can be calculated as follows: c e ta c ta i c vc tdly ? + = + = 6 0 . 3 0 . 1 3 (sec) ( ta ? tdly) t a is the internal processing time that used in the removal of ci rcuit settling time and other pop noises. tdly also decides the protection restart time. amo ng the protection functions in S1A0071, those that remove "causes" (thermal protection, over c urrent protection) oscillate from normal operation protection normal operation protection ? , generating very fast blocking oscillation. the tdly decides (delays) the r epeat cycle of the oscillation, which protects the circuit and controls unstable operations. th ose protection functions (output dc short) that do not remove "causes" are not affected by tdly, and once the cause has been removed, they return to normal operation. note 8 S1A0071 has a built-in limiting block at the input stage that r emove noise signal that may be generated by discontinuous feedback and also this limit block o perate as a clipping circuit due to over-input signal. when a specific voltage ( vls) is applied to vlp and vln, the soft clipping function starts to operate on the input whose value li e outside the vls range, on the basis of the pre amp output with its gain set by r1 and r2. as a result, the entire circuit is enabled to drive only the signals that lie within the operating range, thus maintaining a continuous feedback loop which allows the circuit to output a s oft clipped output waveform even for an input lying outside the output dynamic range. vls must be set differently according to the mosfet power suppl y voltage and power supply impedance, and mosfet on resistance. if we assume that the powe r supply impedance is ideal (= 0) and mosfet on resistor is ideal (0 ohm), the approp riate values for vls values on the power supply voltage (vccp, vssp) would be as follows: vccp, vssp 20v 30v 45v vls 1.05v 1.43v 2.15v
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -19- (this value is obtained by dividing mosfet power supply voltage with rx and ry. considering the speaker load resistance and power supply impedance, vls (soft clipping level) is generated. so, vln/vlp accepts this value, and then stable operation is expected.) to decide on the actually appropriate vls, you must monitor the output waveform at the set connected to the power supply. you can set rx and ry to values that will make vlp and vln generate maximum waveforms, respectively; within the range that has no clipping distortion and other noises. if you don't want to operate the soft clipping function, connect vln and vlp pins to vcc and vss. other application information ? protection S1A0071 has built-in output dc short protection, and over current protection. when the protection block output pins are shorted to vccp or gnd or vssp, respectively, the internal detect circuit immediately stops the buffer output. the over current detect function is driven by the current sensing resistor (50m ), which indicates an over current if the resistor develops a potential of about 1.0v. then the current is about 1.0(v) / 0.05 ( ) = 20 (a). if the speaker " -" pin becomes vccp or vssp and dc shorted, the sensing resistor will be destroyed as well as S1A0071. to prevent ic destruction, you can insert resistors of few k in series at the cf1 pins (pin28, 45). (please refer to no te 5 for more details on protection return time) ? fet driver S1A0071 produces an output of 4.5vp-p and low level is vss. any gate buffer ics can satisfy these conditions, but they should be designed as fair to optimally use with s1a0051, a mosfet driver
S1A0071 audio processor for class-d power amp digital & analog co., ltd. (rev. 1.0) -20- 10. package dimensions #1 #48 #24 #25 0.127 + 0.07 - 0.03 0.005 + 0.003 - 0.001 0.60 +0.15 -0.10 0.024 +0.006 -0.004 8.10 0.319 1.20 0.047 max 12.50 + 0.10 0.492 + 0.004 1.00 + 0.05 0.039 + 0.002 min 0.05 0.002 0.50 0.020 0.20 0.0078 + 0.07 - 0.03 + 0.003 - 0.001 0.50 0.020 typ 6.10 + 0.10 0.240 + 0.004

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