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21710hkim no. a1630-1/13 STK433-290-E overview the STK433-290-E is a hybrid ic designed to be used in 80w 3ch class ab audio power amplifiers. applications ? audio power amplifiers. features ? pin-to-pin compatible outputs ranging from 80w to 150w. ? can be used to replace the stk433-000/-100 series (30w to 150w 2ch) and stk433-200(a) series (30w to 60w 3ch) due to its pin compatibility. ? miniature package (64.0mm 36.6mm 9.0mm) ? output load impedance: r l = 6 to 4 supported ? allowable load shorted time: 0.3 second ? allows the use of predesigned appli cations for standby and mute circuits. series models STK433-290-E stk433-300-e stk433-320-e stk433-330-e output 1 (10%/1khz) 80w 3ch 100w 3ch 120w 3ch 150w 3ch output 2 (0.4%/20hz to 20khz) 50w 3ch 60w 3ch 80w 3ch 100w 3ch maximum rating v cc max (no sig.) 54v 57v 65v 71.5v maximum rating v cc max (6 ) 47v 50v 57v 63v recommended operating v cc (6 ) 33v 36v 41v 44v dimensions (excluding pin height) 64.0mm 36.6mm 9.0mm ordering number : en*a1630 thick-film hybrid ic 3-channel class ab audio power ic , 80w+80w+80w specifications of any and all sanyo semiconductor co.,l td. products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer ' s products or equipment. to verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer ' sproductsor equipment. any and all sanyo semiconductor co.,ltd. products described or contained herein are, with regard to "standard application", intended for the use as general el ectronics equipment (home appliances, av equipment, communication device, office equipment, industrial equ ipment etc.). the products mentioned herein shall not be intended for use for any "special application" (medica l equipment whose purpose is to sustain life, aerospace instrument, nuclear control device, burning appliances, t ransportation machine, traffic signal system, safety equipment etc.) that shall require extremely high level of re liability and can directly threaten human lives in case of failure or malfunction of the product or may cause har m to human bodies, nor shall they grant any guarantee thereof. if you should intend to use our products for app lications outside the standard applications of our customer who is considering such use and/or outside the scope of our intended standard applications, please consult with us prior to the intended use. if there is n o consultation or inquiry before the intended use, our customer shall be solely responsible for the use.
STK433-290-E no. a1630-2/13 specifications absolute maximum ratings at ta=25 c, unless otherwise specified tc=25 c parameter symbol conditions ratings unit maximum power supply voltage v cc max (0) non signal 54 v maximum power supply voltage v cc max (1) r l 6 47 v minimum operating supply voltage v cc min 10 v #13 operating voltage vst off max -0.3 to +5.5 v thermal resistance j-c per one power transistor 2.1 c/w junction temperature tj max 150 c operating substrate temperature tc max should satisfy tj max and tc max 125 c storage temperature tstg -30 to +125 c allowable time for load short-circuit ts v cc = 33v, r l =6 , f=50hz, p o =50w, 1-channel active 0.3 s operating characteristics at unless otherwise specified tc=25c, r l =6 (non-inductive load), rg=600 , vg=30db conditions *2 ratings parameter symbol v cc (v) f (hz) p o (w) thd (%) min typ max unit p o (1) 33 20 to 20k 0.4 47 50 output power *1 p o (2) 33 1k 10 80 w thd (1) 33 20 to 20k 0.4 total harmonic distortion *1 thd (2) 33 1k 5.0 vg=30db 0.01 % frequency characteristics *1 f l , f h 33 1.0 +0 -3db 20 to 50k hz input impedance ri 33 1k 1.0 55 k output noise voltage *3 v no 39 rg=2.2k 1.0 mvrms quiescent current i cco 39 no loading 30 70 120 ma output neutral voltage v n 39 -70 0 +70 mv #13 stand-by on threshold *5 vst on 33 stand-by 0 0.6 v #13 stand-by off threshold *5 vst off 33 operation 2.5 3.0 v [remarks] * 1: for 1-channel operation * 2: unless otherwise specified, use a constant-voltage power supply to supply power when inspections are carried out. * 3: the output noise voltage values shown are peak values read with a vtvm. however, an ac stabilized (50hz) power supply should be used to minimize the influence of ac primary side flicker noise on the reading. * 4: use the transformer power supply circuit shown in the figure below for allowable load shorted time and output noise voltage measurement. * 5: the impression voltage of ?#13 (stand-by ) pin? must not exceed the maximum rating. power amplifier operate by impressing voltage +2.5 to +5.5v to ?#13 (stand-by) pin?. * 6: please connect -prev cc pin (#1 pin)with the stable minimum voltage, and connect so that current does not flow in by reverse bias. * 7: thermal design must be implemented based on the conditions under which the customer?s end products are expected to operate on the market. * 8: the case of this hybrid-ic is using thermosetting silicon adhesive (tse322sx). * 9: weight of hic: 24.8g outer carton dimensions (w l h): 452mm 325mm 192mm 10000 f 10000 f dba40c 500 500 +v cc -v cc + + designated transformer power supply (mg-200 equivalent)
STK433-290-E no. a1630-3/13 package dimensions unit:mm (typ) rohs directive pass equivalent circuit - 6 13 7 10 12 11 8 1 3 sub 9 bias circuit 16 15 pre driver ch1 + 18 17 14 5 19 4 + + - - pre driver ch2 pre driver ch3 2 mono ic 5.0 36.6 18.7 9.0 2.9 5.5 0.4 25.8 4.0 64.0 55.6 3.6 18 2.0=36.0 2.0 (9.8) 0.5 119 (r1.8)
STK433-290-E no. a1630-4/13 application circuit pcb layout example gnd 2 3 4 5 6 7 stk433-300s r c01 r08 c11 r09 c10 +v cc ch2 out ch1 out -v cc +pre 11 12 13 14 ch2 out ch1 out gnd ch2 in gnd ch1 in ch1 in ch1 nf ch2 in ch2 nf st- by gnd stand-by control c19 15 16 ch3 nf ch3 in 17 ch3 out ch3 out gnd c12 r10 8 9 sub gnd ch2 out ch1 out 18 ch3 out c21 c20 1 10 19 -pre r23 r20 r21 r22 r30 c02 c03 c23 r01 c13 r11 c14 r12 c15 r13 r05 r06 r07 r04 r03 r02 c09 c08 c07 c06 c05 c04 l03 l02 l01 r19 r18 r17 c16 c17 c18 r14 r15 r16 ch2 in ch3 in c23
STK433-290-E no. a1630-5/13 recommended external components parts location recommended value circuit purpose above recommended value below recommended value r01, r23 100 /1w resistance for ripple filter. (fuse resistance is recommended. ripple filter is constituted with c03, c23.) - short-through current may increase at high frequency. r02, r03, r04 1k resistance for input filters. - - r05, r06, r07 56k input impedance is determined. output neutral voltage (vn) shift. (it is referred that r05= r08, r06=r09, r07=r10) r08, r09, r10 56k voltage gain (vg) is determined with r11, r12, r13 - - r11, r12, r13 1.8k voltage gain (vg) is determined with r8, r9, r10. (as for vg, it is desirable to set up by r11, r12, r13.) it may oscillate. (vg < 30db) with especially no problem r14, r15, r16 4.7 noise absorption resistance. - - r17, r18, r19 4.7 /1w resistance for oscillation prevention. - - r20, r21, r22 0.22 10%, 5w output emitter resistor (metal-plate resistor is recommended.) decrease of maximum output power it may cause thrmal runaway r30 note*5 select restriction resistance, for the impression voltage of ?#17 (stand-by) pin? must not exceed the maximum rating. c01, c02 100 f/100v capacitor for o scillation prevention. ? locate near the hic as much as possible. ? power supply impedance is lowered and stable operation of the ic is carried out. (electrolytic capacitor is recommended.) - - c03, c23 100 f/100v decoupling capacitor ? the ripple ingredient mixed in an input side is removed from a power supply line. (ri pple filter is constituted with r03, r04.) the change in the ripple ingredient mixed in an input side from a power supply line c04, c05, c06 2.2 f/50v input coupling capacitor. (for dc current prevention.) - c07, c08, c09 470pf input filter capacitor ? a high frequency noise is reduced with the filter constituted by r 02, r03, r04. - c10, c11, c12 3pf capacit or for oscillation prevention. it may oscillate. c13, c14, c15 10 f/10v negative feedba ck capacitor. ? the cutoff frequency of a low cycle changes. (f l =1/(2 ? c13 ? r11)) the voltage gain (vg) of low frequency is extended. however, the pop noise at the time of a power supply injection also becomes large. the voltage gain (vg) of low frequency decreases. c16, c17, c18 0.1 f capacitor for oscillation pr evention. it may oscillate. c19, c20, c21 68pf capacitor for osc illation prevention. it may oscillate. l01, l02, l03 3 h coil for oscillation prevention. with especially no problem it may oscillate.
STK433-290-E no. a1630-6/13 stk433-100/-300sr pcb parts list pcb name: stk403-000sr/100sr/200sr pcba location no. (*2) 2ch amp doesn't mount parts of ( ). parts rating component c hybrid ic#1 pin position - - stk433-100sr (*2) stk433-300sr r01 erg1sj101 100 , 1w enabled r02, r03, (r04) rn16s102fk 1k , 1/6w enabled r05, r06, (r07), r08, r09, (r10) rn16s563fk 56k , 1/6w enabled r11, r12, (r13) rn16s182fk 1.8k , 1/6w enabled r14, r15, (r16) rn14s4r7fk 4.7 , 1/4w enabled r17, r18, (r19) erx1sj4r7 4.7 , 1w enabled r20, r21, (r22) metal-plate resistor is recommended 0.22 , 5w enabled c01, c02, c03, c23 (*3) 100mv100hc 100 f, 100v enabled c04, c05, (c06) 50mv2r2hc 2.2 f, 50v enabled (*1) c07, c08, (c09) dd104-63b471k50 470pf, 50v enabled c10, c11, (c12) dd 104-63cj030c50 3pf, 50v enabled c13, c14, (c15) 10mv10hc 10 f, 10v enabled (*1) c16, c17, (c18) ecq-v1h104jz 0.1 f, 50v enabled c19, c20, (c21) dd104- 63b***k50 ***pf, 50v 100pf 68pf r34, r35, (r36) rn16s302fk 3k , 1/6w short l01, l02, (l03) - 3 h enabled tr1 2sc3332 (reference) v ce 75v, i c 1ma enabled d1 gmb01(reference) di enabled r30 (*4) rn16s***fk ***k , 1/6w 13k 2.7k r31 rn16s333fk 33k , 1/6w enabled r32 rn16s102fk 1k , 1/6w enabled r33 rn16s202fk 2k , 1/6w enabled stand-by control circuit c32 10mv33hc 33 f, 10v enabled j1, j2, j3, j4, j5, j6, j8, j9 - - enabled j7, js2, js3, js4, js5, js7, js8, js9 - - - js6, js10 - - enabled js1 erg1sj101 100 , 1w enabled ( * 1) capacitor mark ?a? si de is ?-? (negative). ( * 2) stk433-100sr (2ch amp) doesn?t mount parts of ( ). ( * 3) add parts c23 to the other side of pcb. ( * 4) recommended standby circuit is used.
STK433-290-E no. a1630-7/13 pin assignments [stk433-000/-100/-200sr & stk415/416-100sr pin layout] 2ch class-ab 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 (size) 47.0 25.6 9.0 2ch classab/2.00mm stk433-030-e 30w/jeita stk433-040-e 40w/jeita stk433-060-e 50w/jeita stk433-070-e 60w/jeita (size) 67.0 25.6 9.0 stk433-090-e 80w/jeita stk433-100-e 100w/jeita stk433-120-e 120w/jeita stk433-130-e 150w/jeita - p r e - v c c + v c c o u t / c h 1 + o u t / c h 1 - o u t / c h 2 + o u t / c h 2 - + p r e s u b ? g n d g n d i n / c h 1 n f / c h 1 s t a n d | b y n f / c h 2 i n / c h 2 3ch class-ab 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 (size) 67.0 25.6 9.0 3ch classab/2.00mm stk433-230a-e 30w/jeita stk433-240a-e 40w/jeita stk433-260a-e 50w/jeita stk433-270-e 60w/jeita (size) 64.0 36.6 9.0 STK433-290-E 80w/jeita stk433-300-e 100w/jeita stk433-320-e 120w/jeita stk433-330-e 150w/jeita - p r e - v c c + v c c o u t / c h 1 + o u t / c h 1 - o u t / c h 2 + o u t / c h 2 - + p r e s u b ? g n d g n d i n / c h 1 n f / c h 1 s t a n d | b y n f / c h 2 i n / c h 2 i n / c h 3 n f / c h 3 o u t / c h 3 + o u t / c h 3 - 2ch class-h 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 (size) 64.0 31.1 9.0 2ch classh/2.00mm stk415-090-e 80w/jeita stk415-100-e 90w/jeita stk415-120-e 120w/jeita stk415-130-e 150w/jeita stk415-140-e 180w/jeita + v l - v l + o f f s e t - o f f s e t - p r e - v h + v h o u t / c h 1 + o u t / c h 1 - o u t / c h 2 + o u t / c h 2 - + p r e s u b ? g n d g n d i n / c h 1 n f / c h 1 s t a n d | b y n f / c h 2 i n / c h 2 3ch class-h 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 (size) 64.0 31.1 9.0 3ch classh/2.00mm stk416-090-e 80w/jeita stk416-100-e 90w/jeita stk416-120-e 120w/jeita stk416-130-e 150w/jeita + v l - v l + o f f s e t - o f f s e t - p r e - v h + v h o u t / c h 1 + o u t / c h 1 - o u t / c h 2 + o u t / c h 2 - + p r e s u b ? g n d g n d i n / c h 1 n f / c h 1 s t a n d | b y n f / c h 2 i n / c h 2 i n / c h 3 n f / c h 3 o u t / c h 3 + o u t / c h 3 -
STK433-290-E no. a1630-8/13 evaluation board characteristics [thermal design example for STK433-290-E (r l = 6 )] the thermal resistance, c-a, of the heat sink for total power dissipation, pd, within the hybrid ic is determined as follows. condition 1: the hybrid ic substrate temperature, tc, must not exceed 125 c. pd c-a + ta < 125 c ................................................................................................. (1) ta: guaranteed ambient temperature for the end product condition 2: the junction temper ature, tj, of each power tr ansistor must not exceed 150 c. pd c-a + pd/n j-c + ta < 150 c .......................................................................... (2) n: number of power transistors j-c: thermal resistance per power transistor however, the power dissipation, pd, for the power transistors shall be allocated equally among the number of power transistors. the following inequalities result from solving equations (1) and (2) for c-a. c-a < (125 ? ta)/pd ...................................................................................................... (1)' c-a < (150 ? ta)/pd ? j-c/n ........................................................................................ (2)' values that satisfy these two inequalities at the same time represent the required heat sink thermal resistance. when the following specifications have been stipulated, th e required heat sink thermal resistance can be determined from formulas (1)' and (2)'. ? supply voltage v cc ? load resistance r l ? guaranteed ambient temperature ta p o - v cc output power, p o /ch - w supply voltage, v cc - v pd - p o total power dissipation within the board, pd - w output power, p o /ch - w thd - p o p o - f output power, p o /ch - w frequency, f - hz total harmonic distortion, thd - % output power, p o /ch - w itf02734 10 20 30 40 50 t h d = 1 0 % ( f = 1 k h z ) t h d = 0 . 4 % ( f = 2 0 k h z ) t h d = 0 .4 % ( f = 1 k h z ) itf02733 0 1.0 0.1 140 120 100 80 60 40 20 0 140 120 100 80 60 40 20 23 57 23 57 10 2 3 57 2 3 57 100 1000 itf02732 0.001 1.0 0.1 0.01 7 5 3 2 7 5 3 2 7 5 3 2 7 5 3 2 7 5 3 2 0.1 1.0 100 10 23 57 23 57 23 57 23 57 10 100 1000 v cc = 33v r l =6 vg=30db 3ch drive rg=600 tc=25 c ch1 measurement r l =6 3ch drive vg=30db rg=600 tc=25 c ch1 measurement v cc = 33v f=1khz r l =6 vg=30db rg=600 tc=25 c 3ch drive v cc = 33v r l =6 vg=30db rg=600 tc=25 c 3ch drive ch1 measurement f = 2 0 k h z f = 1 k h z itf02735 1k 10 100 140 120 40 60 80 100 20 0 2 3 57 2 3 57 2 3 57 2 3 57 10k 100k thd=10% thd=0.4%
STK433-290-E no. a1630-9/13 [example] when the ic supply voltage, v cc , is 33v and r l is 6 , the total power dissipation, pd, within the hybrid ic, will be a maximum of 109.7w at 1khz for a continuous sine wave signal according to the pd-p o characteristics. for the music signals normally handled by audio amplifiers, a value of 1/8p o max is generally used for pd as an estimate of the power dissipation based on the type of continuous signal. (note that the factor used may differ depending on the safety standard used.) this is: pd 85.0w (when 1/8p o max. = 10w, p o max. = 80w). the number of power transistors in audio amplifier block of these hybrid ics, n, is 6, and the thermal resistance per transistor, j-c, is 2.1 c/w. therefore, the required heat sink thermal resistance for a guaranteed ambient temperature, ta, of 50 c will be as follows. from formula (1)' c-a < (125 ? 50)/85.0 < 0.88 from formula (2)' c-a < (150 ? 50)/85.0 ? 2.1/6 < 0.82 therefore, the value of 0.82 c/w, which satisfies both of these formulae, is the required thermal resistance of the heat sink. note that this thermal design exampl e assumes the use of a constant-voltage power supply, and is therefore not a verified design for any particular user?s end product. stk433-300series stand-by control & mute control & load-short protection application (*1) the impression voltage of a stand-by terminal (#13) is the maximum rating (vst max). please set up not to exceed. +5v +5v stand-by control mute control st-by play st-by mute mute stk433-300 series 56k 2 3 4 5 8 7 6 9 10 11 12 13 14 15 1 gnd +v cc -v cc 56k 0.22 /5w 56k 6.8k 6.8k 56k ch2 in gnd ch1 in 10k 10k 10k 2.2k mute control h: single mute l: normal stand-by control(ex) h: operation mode(+5v) l: stand-by mode(0v) 33 f /10v 33k 1k 2k 2.7k sub.gnd ch2 out ch1 out gnd gnd load short protection circuit 10k 100k 56k 1k 22k latch up circuit 16 17 18 19 gnd ch3 out ch3 in 10k +v cc ch2 out ch1 out -v cc +pre ch1 in ch1 nf ch2 in ch2 nf st- by ch3 nf ch3 in ch3 out sub gnd ch2 out ch1 out ch3 out -pre 56k 6.8k 0.22 /5w 0.22 /5w 0.1 f
STK433-290-E no. a1630-10/13 [stk433-300 series stand-by control using example] characteristic ? it can largely improve a pop noise to occur in power supply on/off by using recommended stand-by control application. ? because it can perform stand-by cont rol by regulating limit resistan ce to the voltage such as used microcomputers, a set design is easy. (ex) stk433-300series test circuit. when impressed by stand-by control control [+5v]. operation explanation (1) concerning pin 13 reference voltage vst <1> operation mode the sw transistor of bias ci rcuit is turned on at vst 2.5v, and the amplifier becomes operation mode. ex) vst=2.5v vst=( * 2) ist+0.6v 2.5v=4.7k ? ist+0.6v, ist 0.40ma <2> standby mode the sw transistor of pre-driv er ic is turned off at vst 0.6v (typ0v), and the amplifier becomes stand-by mode. ex) vst=0.6v vst=( * 2) ist+0.6v 0.6v=4.7k ? ist+0.6v, ist 0ma ( * 3) it can improve a pop noise at power up time by giving a time constant of the condenser during operation. ( * 4) please decide a time constant to discharge the condenser during standby. sink current ist concerning pin 13 reference voltage vst stand-by control h: operation mode (+5v) l: stand-by mode (0v) 2.7k (*1) 33 2k (*4) vbe 1 2 3 4 7 6 5 8 9 10 11 12 stk433-300 series 13 14 bias circuit in predriver ic vbe 15 4.7k (*2) 16 17 18 19 ex) stand-by control voltage=+5v vst=(5v-vbe 2) 4.7k /((*1)+4.7k )+vbe =(5v-0.6v 2) 4.7k /(4.7k +2.7k )+0.6v 3.0(v) 1k +v cc ch2 out ch1 out -v cc +pre ch1 in ch1 nf ch2 in ch2 nf st- by ch3 nf ch3 in ch3 out sub gnd ch2 out ch1 out ch3 out -pre
STK433-290-E no. a1630-11/13 stk433-300-e series stand-by control, mu te control, load-short protection & dc offset protection application stk433-300-e application explanation the protection circuit application for the stk433-300-esr consists of the following blocks (blocks (1) to (4)). (1) standby control circuit block (2) load short-circuit detection block (3) latch-up circuit block (4) dc voltage protection block 2 3 4 5 6 7 8 9 10 11 12 13 14 1 15 ch1 out gnd +v cc -v cc stk433-300-e series st-by 56k gnd ch2 in gnd ch1 in +v cc ch1 in ch1 nf ch2 in ch2 nf ch2 out(-) ch1 out(+) -v cc sub gnd +pre st-by ch1 out(-) ch2 out(+) -pre 0.22 /5w 6.8k (*1) (ex) 2.7k 0.22 /5w 56k 56k load short protection circuit 22k 56k 1k 0.1 f 10k 100k 1k 33k 2k 33 f / 10v 10k 10k 10k 2.2k gnd play mute st-by mute +5v +5v stand-by control mute control mute control h: single mute l: normal stand-by control (ex) h: operation mode (+5v) l: stand-by mode (0v) dc offset protection (*1) the voltage applied to the stand-by pin (#13) must not exceed the maximum rated value (vst max). latch up circuit 16 17 18 19 ch3 in ch3 nf ch3 out ch3 out 56k 6.8k ch3 in 10k gnd ch2 out ch3 out 82k 82k 82k 22 f 22 f 100k (*4) r2 0.22 /5w 56k 56k 6.8k stk433-300-e series +v cc ch1 in ch1 nf ch2 in ch2 nf ch2 out(-) ch1 out(+) -v cc sub gnd +pre st-by ch1 out(-) ch2 out(+) -pre ch3 in ch3 nf ch3 out(+) ch3 out(-) 2 3 4 5 6 7 8 9 10 11 12 13 14 1 15 16 17 18 19 ch1 out 56k 0.22 /5w 6.8k 56k 56k tr1 ch2 out ch3 out 82k 82k 82k 22 f 22 f 100k 56k 0.22 /5w 6.8k -v cc 56k 22k 100k 10k 0.1 f 1k 56k 56k 0.22 /5w 6.8k (*1)r1 (ex) 2.7k 1k 33k 2k 33 f (*4) r2 tr2 tr4 tr5 tr6 point.b point.c point.b point.c tr1 i2 (3) latch-up circuit part i3 ist stand-by circuit in predriver ic stand-by control voltage vst (4) dc offset protection operate mode (vstoff) 2.5v stand-by mode (vston) 0.6v (0v typ) (2) load short detection part sw transistor vbe 4.7k 1) stand-by control circuit part h: operation mode (+5v) l: stand-by mode (0v)
STK433-290-E no. a1630-12/13 1) stand-by control circuit block (reference example) stk433-300-e series test circuit (when +5v is applied to stand-by control.) concerning pin 13 reference voltage vst <1> operation mode the switching transistor in the bias circuit turns on and places the amplifie r into the operating mode when the voltage flowing into pin 13 (vst) becomes 0.25v or greater. <2> stand-by mode when the voltage flowing into pin 13 (vst) is stopped (= 0v), the switching transistor in the bias circuit turns off, placing the amplifier into the standby mode. ( * 1) the current limiting resistor (r1) must be used to ensure that the voltage flowing into the stand-by pin (pin 13) does not exceed its maximum rated value vst max. ( * 2) the pop noise level when the power is turned on can be reduced by setting the time constant with a capacitor in operating mode. ( * 3) determines the time constant at which the capacitor ( * 2) is discharged in standby mode. 2) load short detection block since the voltage between point b and point c is less than 0.6v in normal operation mode (v be < 0.6v) and tr1 (or tr2) is not activated, the load short-ci rcuit detection block does not operate. when a load short-circuit occurs, however, the voltage between point b and point c becomes larger than 0.6v, causing tr1 (or tr2) to turn on (v be > 0.6v), and current i2 to flows 3) latch-up circuit block when i2 was supplied to latch-up circuit, tr3 operate. vst becomes stand-by mode (0v) when tr3 operate s (i3 flows), the power amplifier is protected. stand-by mode is maintained when once tr3 operates because tr3 and tr4 compose the thyristor. it is necessary to make the stand-by control voltage ( * 2) l (0v) once to release stand-by mode and to make the power amplifier operate again. after, when stand-by control ( * 2) is returned to h (ex, +5v), it operates again. ( * 4) i3 is changed depending on the power-supply voltage (-v cc ). please set resistance (r2) to become i1 < i3 by the following calculation types. i1 i3 = v cc /r2 4) dc offset protection block the dc offset protection circuit is ac tivated when 0.5v (typ) voltage is applied to either "out ch1" or "out ch2," or "out ch3," and the hybrid ic is shut down (standby mode). to release the ic from the standby mode and reactivate the power amplifier, it is n ecessary to set the standby control volt age temporarily low (0v). subsequently, when the standby control is returned to high (+5v, fo r example), the power amplifie r will become active again. the protection level must be set using the 82k resistor. furthermore, the time constant must be determined using 22 //22 capacitors to prevent the amplifier from malfunctioning due to the audio signal. 2 3 4 5 6 7 8 9 10 11 12 13 14 1 15 stk433-300-e series +v cc ch1 in ch1 nf ch2 in ch2 nf ch2 out ch1 out -v cc sub gnd +pre st-by ch1 out ch2 out -pre (*1) r1 2.7k 1k (*3) 33k 2k (*3) 33 f ( *2 ) stand-by control voltage h: operation mode (+5v) l: stand-by mode (0v) 16 17 18 19 ch3 in ch3 nf ch3 out ex) stand-by control voltage=+5v vst=(5v-vbe 2) 4.7k /((*1)+4.7k )+vbe =(5v-0.6v 2) 4.7k /(4.7k +2.7k )+0.6v 3.0(v) 4.7k vbe vst stand-by circuit in predriver ic vbe ch3 out
STK433-290-E no. a1630-13/13 ps this catalog provides information as of february, 2010. specificati ons and information herein are subject to change without notice. sanyo semiconductor co.,ltd. assumes no responsibil ity for equipment failures that result from using products at values that exceed, even momentarily, rated v alues (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qua lity high-reliability products, however, any and all semiconductor products fail or malfunction with some probab ility. it is possible that these probabilistic failures or malfunction could give rise to accident s or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause damage to other property. when designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design. upon using the technical information or products described herein, neither warranty nor license shall be granted with regard to intellectual property rights or any other rights of sanyo semiconductor co.,ltd. or any third party. sanyo semiconductor co.,ltd. shall not be liable for any claim or suits with regard to a third party's intellectual property rights which has resulted from the us e of the technical information and products mentioned above. information (including circuit diagrams and circuit par ameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained he rein are subject to change without notice due to product/technology improvement, etc. when designing equip ment, refer to the "delivery specification" for the sanyo semiconductor co.,ltd. product that you intend to use. in the event that any or all sanyo semiconductor co.,ltd. products described or contained herein are controlled under any of applicable local export control l aws and regulations, such products may require the export license from the authorities concerned in accordance with the above law. no part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd.

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