Ordering number: EN 1440E | | Monolithic Linear IC No.14408_ / LA4508 8,5 2-CHANNEL AF PoweR AMPLIFIER Features Low idling current (20mA/2 channels} Output power 8.5W x 2 typ. (Ri, = 3ohms) e High ripple rejection (6G0dB at steady state) Small pop noise at the time of power supply GN e Thermal protector * Adoption of SEP14H (@j. = 3C/W) facilitates thermal design. Maximum Ratings/T, = 25C unit Maximum supply voltage Vcc max 24 Vv Allowable power dissipation Pg max With-infinite heat sink 15 W Maximum output current lg peak 1 channel 2.5 A Operating temperature Topr 20 to +75 C Storage temperature Tstg 40 to +150 c Operating Conditions/T, = 25C unit Recommended supply voltage Vee 15 Vv Operating voltage range Vcc" Pay max must not be 9 to 23 Vv exceeded. Recommended load resistance RL 2 channels 3 2 Operating Characteristics/Tg = 25C, Vcc = 15V, Ry = 3Q (2 channels), f = 1kHz, Rg = 6002, See specified test circuit. min typ max unit Quiescent current leeo 2 channels 10 20 30 mA Voltage gain VG 42 44 46 dB Voltage gain difference AVG chi, ch? +1 dB Output power Po THD = 10% 75 85 W Total harmonic distortion THD Vo=2V 0.15 10 6% Input resistance rj 30k 2 Output noise voltage VNOI Rg = 0, f = 20Hz to 20kHz, 02 O58 mV B.P.F VNO?2 Rg = 10k&2, f = 20Hz to 20kHz, 0.3 1.0 mv B.P.F Ripple rejection Rr 45 60 dB Channel separation ch sep 45 55 dB Package Dimensions 3023A-S14HIC (unit:mm ) 45 SANYO: SEP14H SANYO Electric Co.,Ltd. Semiconductor Business Headquarters TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN D0994.JN/O147K1/8056/8064/N283 No.1440-1/7LA4508 Equivalent Circuit o3 Fas =R5 - e HEE R? \ pid Rz7 wat , iit 4) icv TRE TH ta. fee pS R21 eh. TRIS RB \ Ht ie t TRA DE DS Ra | TR TRA) Rt ra WT Le Thal % ono oO +L R2Ri TRI : , RI Wie = TRI ~o TRA TR2 R34 icne rae RS ms hy HL pn, Rw 9 RIO 4 Xt (he oe Riz TRIO i me J _ re 5 40 TRIS TRA? 2 Rie TR20 TRI2 Py Rae zs RYT pa 7 sre 13 BAN "7 4 Ria a o TRI Ris= re) Lon spy 120 16 Unit (resistance: 2, capacitance: F) = Sample Application Circuit vec 0S130T 9 100} /6.3 > CB OnppTIev input} a os Thay vies 8% j polyester + il ch | poem Fe tor 2 o 4 Preamp | GND 000g F 7 i2 om ch2 | Input 2 w \ O-__. | C? = JP, hear loop / 16 2 ' My Bol woogy hie C4 oft RZ ie tsp k ois) 38 rh? poi iS" *1,*2: Connected when operating OV sets Nun cgpachor No. 1440-2/7LA4508 Sample Printed Circuit Pattern (Cu-foiled area) = is Na = = = + ~ - ae * = *, 7 - a * a = ls * 4 * = 6 Pq max - Ta = Of - Sf I I | Pt. ., Al radiator fin | eo A! radiator fin, t=15mm x yy, L With infinite radiator * Mounting | J Mounting torque E hastI-C=StW fin torque ; 3 4kg-cm , ~~, fn. 5 akg: em' . Silicone grease applied O12 Q5 T " 9: em e o NY +, ,, Silicone | = & 10 Ny. Op grease ra S| Sone : on 3 aA , applied # _o 5 soar mn _ Oo 6 5 *r oD 7 C5 | NL 7 a oa 6 Ne gs S o 4.3 5 8 Ss 4 a . e g Now ra, ag me a 8 2 Stor fin Hye, [ore : Se + 2 = 2 = 0 3 & 0 2 4 66 8 100 120 E 100 < Ambient temperature, Ta C 2 Area of radiator fin, S ~ cm? - Description of external parts Cy: Co (Ca): C4 (CB): Cg (C7): Cg (Cg): Cio (C41): C12: Decoupling capacitor Used for the ripple filter. Since the rejection effect is saturated at a certain capacity, it is meaningless to increase the capacity more than needed. This capacitor, being also used for the time constant of the pop noise preventer, affects the starting time. Too small a capacity makes the pop noise level higher. (Recommended value: 100uF to 330uF) Feedback capacitor Since the tow. cutoff frequency depends on this feedback capacitor, the required bandwidth must be considered before determining the value of this feedback capacitor. This feedback capacitor also affects the starting time. . Switching distortion suppressing capacitor Used to suppress switching distortion which often appears at high frequencies i in overinput mode. The recommended value is 0.01F {ceramic capacitor). Bootstrap capacitor The output at low frequencies depends on this capacitor. If the capacity is decreased, the output at low frequencies goes lower. 47uF min. is required. (This, however, does not apply if load R__ is light.) Output capacitor The low cutoff frequency depends on this output capacitor. (Refer to the characteristic graph.) Oscillation blocking capacitor Polyester film capacitor, being excellent in temperature characteristic, frequency characteristic, used. The use of an aluminum electrolytic capacitor or ceramic capacitor may cause oscillation to occur at low temperatures, . Power source capacitor This power source capacitor must accomodate loads (motor, etc.) in the power line or ripple in the transformer output. The recommended value is 1000uF to 2200uF. No. 1440-3/7LA4508 Ry Dj: Total harmonic distortion, THD % If the IC is used at Vor = 9V or thereabouts, clip balance may be disturbed. This resistor can be used When a motor is started, or in similar modes, the supply voltage drops abruptly, causing the filter transistor to be saturated. This diode is a bypass diode and can be used to prevent such saturation from occurring. Whether or not to use this diode depends on the set to be made. (Ra}: Normally, this resistor is not required, to correct such disturbance, Py - V = t a 10 a 3 3 Qa, _ a Oo o1 + = o 108 Input voltage, Vj mV THD- P Voo= 15 RL=30 Re= 4000), - == 44aB 5 5 o = t Output power, Py W ch sep - f 80 y 70 o 60 Let chl->CH2 Lor pan. | x= f PL e 50) YF had St kw ss 2 =} oh2~chl @ 30 3 2 7% Voo= 18v 5 io R= 30 ' RE= 10k 0 0 VYo= 0dBm (Vo=775mv) 10 100 th 39 5 yk 24 > 10m Frequency, f Hz Response -- dB , f Response 0 oa 1 te YZ f S// Y Roll-off frequency 4 ff F / \ -6 + * & x Is \ -B-O e sits \ 19 Vos 15 10 ean 2 ; VO= 44408 / [kHz 10 2 1 3 5 wn fF 3 oK 2 100k Frequency, f Hz THD - f Ripple rejection, SVRR dB. Total harmonic distortion, THD % 2 a 30 Vec= 1 5V RL=30 Rg =46000 Vo =2V VG=44a5 k Frequency, f Hz SVRR ~ R VNO Vro region|Vro > Vo region J | SVRR=20 log (victim) | Voo= 15 LAL =3 0) kg=9 it | Ripple, Noise | I R= 100Hz B-P.F (DIN AUDIO) 8 1 20 3M 50D 6D 700 BOO 90D 100 Power source ripple component, Vrp mV No. 1440-4/7LA4508 SVRR - R 80 g co ] | 70 oc iad | | & 60 > = 2 5 50 e & oo= l5V a 40 RL=30 & fa= 100H2 Va=Cdim (Q=77 5m) x B.P.F (DIN AUDIO) > "1 4 Fs 1k *& 3 3S Figk 2 375 Noe Signal source resistance, Rg 2 Vrp - fR 20 = Voo= 18V > 168 RL=30 E <2 =0 11 4, oy, 2 > D a W on a e 10 2s o 1 a > oa +4 2 X Go 6 ~%, = a ~ OA e = = a2 s0 o 1k Power supply ripple frequency, fR Hz Vero - Ver oS Re=0 fp= |00Hz =30 o 9 4 @ Vro1 VR=0aBm) 2 w Vrp2 WR= 150m) Output ripple voltage, Vrp mV o 8 A o - 1 6 18 Supply voltage, Veco V THD - ec 2 RL=32 * Re=6000 oO f=lkHz x 1.0 kK c 4 2 tc 3 2 5 \\ Po= Loom E \ | 7 c NK 1.33W o1 | c 0 4 6 12 16 z0 2 4 Supply voltage, Vec V Output ripple voltage, Vrp mvV Voo= | sv RL=30 fR=100Hz B+P-F (DIN AUDIO) a ? o S Ba = igo) san) Wye? YR 0 (noise rego ae e 100 1k 10k Signal source resistance, Rg 02 Vy - VR 1.0 p 1 Voo= 15 > 09) RL =30 | "| fR= lO0Hz 991 B.P.F (DIN AUDIO) / > [ o O6 7 a f os - 7 g ZL > O4 2 ~ Q a3 Qo ques a = hee t ae e 02 a Bo a . oO 4a 0 100 200 300 0 500 600 700 80 900 100 NIM Power source ripple component, Vp mV Vrp - Cdc o > E | 08 a Pa Sor 4, B.P.6 (DIN AUDIO) a 0.6 S \ g % aw zB oO 2 03 5 02 a 5 01 9 100 1000 Pin 1 decoupling capacitor value, Cl uF Icc - Po oy wy Ae mA (2 channels} 8 8 Voc= 15V f= (kHz 2 channel 10 2 2 a 4 4 3 16) Output power, Po W Current dissipation, lcc No. 1440-5/7LA4508 Pa - Po, Pq max - VCC = lo = | Lo | ie i x ol 0 10 a al a a E wel [- "| ~ uy 5 a a AG) j-- = c x cars | 3 al oa a 2 2 3 Lao a _ a 4 . 10 a? to 5 La & 10 om 01 10 10 $ 1 tM i 13 1 15 16 17 16 19 20 Output power, Po W Supply voltage, Veo V Po - Vcc I - V Q 7 cco cc 4 f - Ea = TT i Pra, | 0 = 8 Pa ao , a 20 3, AO 5 P| s ra b ~~ + 16 8 a 3 - * _ 3 ra Cc aj, - Re=6000 8 a RL=30 8 f=\kkz 8 to THD= 10% 8 5 5 16 12 14 16 8 20 4 B COCd2~S=aSSCCSC~~ SC Supply voltage, Vee ~ V Supply voltage, Veg V Proper cares in using IC 1, * maximum rating to be exceeded, thereby leading to breakdown, Allow an ample margin of variation for supply If the IC is used in the vicinity of the maximum rating, even a slight variation in conditions may cause the voltage, etc. and use the IC in the range where the maximum rating is not exceeded. . Pin-to-pin short, inverted insertion if supply voltage is applied when the space between pins is shorted, breakdown or deterioration may occur. When mounting the IC on the board or applying supply voltage, make sure that the space between pins is not shorted with solder, etc. If the IC is inserted inversely, it may be broken down momentarily because of pin 7: Power Gnd, pin 8: Vcc. . Load short If the IC is used with the load shorted for a long time, breakdown or deterioration may occur. Be sure not to short the load. . Change in closed-loop gain By connecting RF in series with pins 3, 12 (NF pin), the gain can be reduced, but the following must be noted. a. If RNEF is connected, the ripple bypass effect brought about by the NF capacitor is lessened, leading to insufficient ripple rejection. 6b, Do not operate at 40dB or less so that stable oscillation is maintained. . When the IC is used in radios or radio-cassette tape recorders, keep a good distance between [C and bar antenna. A capacitor of 0.022uF or more (polyester film capacitor) connected between pins 9 and 7 and between pins 6 and 7 acts effectively against radiation to the SW band. . Printed circuit board When making the board, refer to the sample printed circuit pattern. No feedback loop must be formed between input and output and make the line thick and short so that no common resistor exists between pre-GND and power-GND. Continued on next page. No. 1440-6/7LA4508 Continued from preceding page. 7, Some plug jacks to be used for connecting to the external speaker are such that both poles are short-circuited once when connecting. In this case, the load is short-circuited, which may break down the IC. 8. Improvement in reduced voltage characteristic (Reference example). By connecting parts as shown below, distortion-free operation can be performed at a supply voltage down to Vec = 4.5V or thereabouts. The capacitor of 100uF is connected to suppress pop noise. Unit (resistance: Q, capacitance: F) Proper cares in mounting radiator fin 1. The mounting torque is in therange:of 4 to 6kg.cm. 2. The distance between screw holes of the radiator fin must coincide with the distance between screw holes of the IC, With case outline dimensions L and R referred to, the screws must be tightened with the distance between them as close to each other as possible. LA [| - 4- 3. The screw to be used must have a head equivalent to the truss machine screw or binder machine screw defined by JIS. Washers must be also used to protect the IC case. 4. No foreign matter such as cutting particles shall exist between heat sink and radiator fin. When applying grease on the junction surface, it must be applied uniformly on the whole surface. 5. IC lead pins are soldered to the printed circuit board after the radiator fin is mounted on the IC. Mi No products described or contained herein are intended for use in surgical implants, Ifa-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment and the like, the failure of which may directly or indirectly cause injury, death or property joss. Mi Anyone purchasing any products described or contained herein for an above-mentioned use shall: @ Accept full responsibility and indemnify and defend SANYO ELECTRIC CO., LTD., its affiliates, subsidiaries and distributors and al their officers and employees, jointly and severally, against any and all claims and litigation and all damages, cost and expenses associated with such use: @ Not impose any responsibility for any fault or negligence which may be cited in any such claim or litigation on SANYO ELECTRIC CO. LTD, its affiliates, subsidiaries and distributors or any of their officers and employees jointly or severally, mo Information (including circuit diagrams and circuit parameters) herein is for example only; it is not guarant- eed for volume production. SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its Use or any infringements of intellectual property rights or other rights of third parties. No, 1440 7/7