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orderin g numbe r : ena1568 bi-cmos ic for portable electronic device use 1.2w 2ch btl power amplifie r LV4985VH overview the LV4985VH has a 2-channel power circuit amplifier including an electronic volume control built in. it has a function for switching the headphone driver and also has a standby func tion to reduce the current drain. it is a power amplifier ic optimal for driving the speakers used in portable equipment and low power output equipment. applications portable dvd players, active speakers, compact lcd-tvs/lcd monitors, notebook pcs and more. features ? 2-cannels btl power amplifier built-in : standard output power = 1.2w (v cc = 5v, r l = 8 , thd = 10%) output coupling capacitor is unnecessary because of differential output type. ? volume function built-in (variable range: 69 db standard), dc voltage control system ? mute function built-in (shared with vol-min) ? standby function built-in (three-value control ? shared with the second amplifier stop control pin) : standard standby current = 0.01 a (v cc = 5v) ? second amplifier stop control function built-in (three-value control ? shared with the standby pin) : headphone driver switch (for btl/se switch) simple mute (only btl power amplifier path) ? thermal protection circuit built-in ? operation supply voltage range : v cc = 4.5v to 5.5v ? output phase compensation capacitor not necessary 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 electronics 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. o1409 sy pc 20090914-s00001 no.a1568-1/15
LV4985VH no.a1568-2/15 specifications maximum ratings at ta = 25 c parameter symbol conditions ratings unit maximum supply voltage v cc max 6 v allowable power dissipation pd max * mounted on a specified board.* 1.45 w maximum junction temperature tj max 150 c operating temperature topr -20 to +75 c storage temperature tstg -40 to +150 c * specified board (sanyo semiconductor evaluation board) : 50mm 50mm 1.6mm, glass epoxy both side. operating conditions at ta = 25 c parameter symbol conditions ratings unit recommended supply voltage v cc 5 v recommended load resistance r l 8 to 32 allowable operating supply voltage range v cc op 4.5 to 5.5 v electrical characteristics at ta = 25 c, v cc = 5v, fin = 1khz, r l = 8 , v9 = 2.5v, v10 = 3v, pwr-amp-vg = 20.7db ratings parameter symbol conditions min typ max unit quiescent current drain i cco p no signal, no load 11.5 20 ma standby current drain i stby no signal, v9 = 0.3v 0.01 5 a maximum output power p o max thd = 10% 0.8 1.2 w btl voltage gain vg vin = -30dbv 25.8 27.8 29.8 db volume voltage gain vgvol vin = -30dbv, volume output pin 7.1 db channel balance chbal vin = -30dbv -2 0 +2 db total harmonic distortion thd vin = -30dbv 0.4 1 % maximum output noise voltage v n max rg = 620 , 20 to 20khz 0.7 1.4 mvrms minimum output noise voltage v n min rg = 620 , 20 to 20khz 0.06 mvrms channel separation chsep vin = -20dbv, rg = 620 58 66 db volume variable range wvol vin = -30dbv 69 db mute attenuation level attmt vin = -10dbv, v10 = 0.25v, 1khz-bpf -72 -82 dbv ripple rejection ratio svrr rg = 620 , fr = 100hz, vr = -20dbv 30 db output dc offset voltage vos -30 +30 mv reference voltage vref pin 6 voltage, amplifier operation reference dc voltage source 2.5 v volume maximum control voltage mxvol pin 10 control voltage 2.8 v muting control voltage vmt pin 10 control voltage 0 0.25 v high level control voltage (pin 9) v9ch full operating mode (btl mode) 2.3 v cc v middle level control voltage (pin 9) v9cm second amplifier non-operating mode (se mode) 1.3 1.7 v low level control voltage (pin 9) v9cl standby (shutdown) mode 0 0.3 v
LV4985VH package dimensions unit : mm (typ) 3313 pd max -- ta 0 1.2 1.45 0.35 0.8 0.4 1.6 --20 60 20 40 0 100 80 ambient temperature, ta -- c maximum power dissipation, pd max -- w 0.21 0.87 independent ic sanyo evaluation board (double-sided) : 50 50 1.6mm 3 (glass epoxy) sanyo : hssop14(225mil) 6.5 6.4 4.4 0.22 0.65 1.3 (2.35) 1.5 17 8 14 0.1 1.5max (1.3) 0.5 0.15 no.a1568-3/15
LV4985VH block diagram 8 9 10 11 12 13 14 7 6 5 4 3 2 1 tsd volume volume volume cnt bias cnt 2nd-amp cnt v cc gnd out2-2 out2-1 pin2 vlout2 vol stby in2 gnd out1-2 out1-1 v cc pin1 vlout1 vref in1 1st-amp - + 1st-amp 2st-amp 2st-amp radiator fin radiator fin + - + - + - test circuit + vin v9cnt vvol 8 9 10 11 12 13 14 7 6 5 4 3 2 1 v cc no.a1568-4/15
LV4985VH evaluation board circuit + 0.33f 0.33f 0.33f 0.33f 18k 100k out2-2 out2-1 se2 vol stby in2 out1-2 out1-1 se1 v cc gnd in1 8 9 10 11 12 13 14 7 6 5 4 3 2 1 1f 0.1 f 2.2f 100f 18k 100k + 100f + evaluation board layout (50mm 50mm 1.6mm) top layer bottom layer no.a1568-5/15
LV4985VH application circuit example 1 (btl mode only) + c4 0.33f r5 from cpu c3 0.33f 18k 100k r3 r4 speaker v cc 8 9 10 11 12 13 14 7 6 5 4 3 2 1 c2 vin2 0.33f 0.33f c5 1f c7 0.1f c6 2.2f r1 18k r2 100k speaker c1 vin1 r7 from cpu c8 r8 application circuit example 2 (btl mode/se mode changeover) c4 0.33f r5 r6 c3 0.33f c5 1f + c7 0.1f c6 2.2f r7 from cpu 18k 100k r3 r4 speaker v cc 8 9 10 11 12 13 14 7 6 5 4 3 2 1 c2 vin2 0.33f 0.33f r1 18k r2 100k speaker c1 vin1 from cpu c8 r8 from cpu r11 1k r12 1k 100k r14 100k r13 v cc to cpu 100f 33 c9 r9 + 100f 33 c10 r10 + no.a1568-6/15
LV4985VH pin functions pin voltage pin no. pin name v cc = 5v description equivalent circuit 1 14 out1-2 out2-2 2.49 power amplifier 2nd output pin. 1 14 v cc vref v cc 10k + - gnd 2 13 out1-1 out2-1 2.49 power amplifier 1st output pin. 2 13 v cc vref v cc 10k 30k + - gnd 3 v cc 5.0 power supply pin. 4 12 pin1 pin2 2.49 power amplifier input pin. 12 4 v cc vref + - 5 11 vlout1 vlout2 2.49 volume output pin. 5 11 v cc vref + - vol 6 vref 2.49 ripple filter pin. (for filtering capacitor connection) v cc gnd 600k 50k 50k vref 6 v cc 7 8 in1 in2 0 input pin. 5k 15k 8 7 v cc + - gnd continued on next page. no.a1568-7/15
LV4985VH continued from preceding page. pin voltage pin no. pin name v cc = 5v description equivalent circuit 9 stby external apply standby/2nd amplifier stop control pin. 0 to 0.3v ? standby mode 1.3 to 1.7v ? se mode 2.3 to v cc ? btl mode + - v cc gnd vb1 150k 30k 9 v cc 10 vol external apply volume control pin. v cc gnd 10 v cc usage note 1. input coupling capacitor (c1 and c2) c1 (c2) is an input coupling capacitor that is used to cut the dc component. the input coupling capacitor c1 (c2) and the input resisters of 20k (15k + 5k ) make up a high-pass filter, attenuatin g the bass frequency. therefore, the capacitance value must be selected with du e consideration of the cut-off frequency. the cut-off frequencies are expressed by the following formulas. 1ch ? fc1 = 1/ (2 c1 20000) 2ch ? fc2 = 1/ (2 c2 20000) this capacitor affects the pop noise at startup. note w ith care that increasing the capacitance value lengthens the charging time of the capacitor, which will make the pop noise louder. 2. input coupling capacitors (c3 and c4) in the power amplifier block c3 (c4) is an input coupling capacitor that is used to cut the dc component. the input coupling capacitor c3 (c4) and the input resistor r1 (r3) make up a high-pass filter, atte nuating the bass frequency. therefore, the capacitance value must be selected with due consid eration of the cut-off frequency. the cut-off frequencies are expressed by the following formulas. 1ch ? fc3 = 1/ (2 c3 r1) 2ch ? fc4 = 1/ (2 c4 r3) this capacitor affects the pop noise at startup. note w ith care that increasing the capacitance value lengthens the charging time of the capacitor, which will make the pop noise louder. 3. btl voltage gain of the power amplifier block the voltage gain of the first amplifier is determined by the ratio between the resistors r1 and r2 (r3 and r4). 1ch ? vg1 = 20 log (r2/r1) unit : db 2ch ? vg2 = 20 log (r4/r3) unit : db therefore, the btl voltage gain of the power amplifier block is expressed by the following formulas. 1ch ? vgbtl1 = 6 + 20 log (r2/r1) unit : db 2ch ? vgbtl2 = 6 + 20 log (r4/r3) unit : db the btl voltage gain of the power amplifier bl ock must be set in the range of 0 to 26db. no.a1568-8/15
LV4985VH 4. pin 6 capacitor (c5) this capacitor is a ripple filter capacitor. the internal resistors (600k + 50k ) and c5 make up a low-pass filter that is used to reduce the power supply ripple component and increase the ripple rejection ratio. note that inside the ic, the rising-transient-response-characte ristic of the pin 6 voltage (reference voltage) is used to activate the automatic pop noise reduction circuit. therefore, when reducing th e c5 capacitance value to increase the voltage rise speed, the design should take into account that the pop noise increases during voltage rise. 5. power supply line capacitor (c6 and c7) the bypass capacitor c7 is used to remove the high frequency component that cannot be eliminated by the power supply capacitor c6 (chemical capacitor). place the bypass capacito r c7 as near to the ic as possible, and use a ceramic capacitor with good high frequency characteristics. when using a stabilized power supp ly, these capacitors can also be combined into a single 2.2 f ceramic capacitor. note that when the power supply line is relatively unstable, the power supply capacitor c6 capacitance value must be increased. 6. load capacitance when connecting a capacitor between the output pin and ground to suppress electromagnetic radiation or other purposes, the effects of this capacitor may cause the po wer amplifier phase margin to be reduced, resulting in oscillation. when adding this capacitor, care should be taken for the capacitance value. recommended capacitance va lue : 1000pf to 0.1 f 7. headphone drive when also using the btl amplifier?s first amplifier as the headphone amplifier, it is recommended to adjust the level by inserting series resistors r9 (r10) to the signa l line as shown in application circuit example-2. note that this series resistor, the headphone load resist ance and the output coupling capa citors c9 (c10) make up a high-pass filter, so this should be taken into account in the design. the cut-off frequencies are expressed by the following formulas. 1ch ? fc5 = 1/ (2 c9 (r9 + r l )) 2ch ? fc6 = 1/ (2 c10 (r10 + r l )) 8. standby pin (pin 9) as shown in figure1, by controlling the standby pin, the mode changeover can be made between standby mode, single-ended (se) operating mode, and btl operating mode. state pin 9 voltage port a port b standby mode 0v to 0.3v low low se operating mode 1.3v to 1.7v high low btl operating mode 2.3v to v cc high high a-port b-port LV4985VH v cc v cc stby stby stby cpu r5 r6 9 a-port cpu r5 r5 9 9 3 fig. 1 fig. 2 fig. 3 when not using the single-ended operating mode, a direct control is possible by connecting the standby pin to the cpu output port. however, it is recommended to insert a series resistor r5 (1k or more) as shown in figure 2 in case the pin is affected by the digital noise from cpu. in addition, when not using the standby mode, the pin 9 can also be used interlocked with the power supply as shown in figure 3. since there exists an internal current limiting resistor (30k ), the series resistor r5 can be eliminated, but the current i9 expressed by the fo llowing formula flows through the pin 9, so this should be taken into account in the design. pin 9 inflow current (unit : a) : i9 = 4.7 10 -6 + (v cc - 0.7)/(r5 + 30000) no.a1568-9/15
LV4985VH 9. electronic volume control (pin 10 control) by changing voltage applied to the pin 10, the voltage gain of the built-in vca(variable control amplifier) is varied. since the ripple component of applied voltage is ge nerated, a stabilized power source must be used. when controlling the amplifier using the pwm signal from the cpu, use a resistor and capacitor for dc conversion as shown in figure 4 and adjust the voltage gain by changing the pulse width of pwm signal. in this case, the frequency of pwm signal used must be higher than audio frequency band. pwm output pwm signal discharge resistor LV4985VH vol cpu r7 c8 r8 10 fig. 4 10. thermal protection circuit the ic has a built-in thermal protection circuit that can reduce the risk of breakdown or degradation when the ic becomes abnormally hot for some reason . when the internal chip junction temp erature tj rises to approximately 170 c, this protective circuit operates to cut off the power suppl y to the power amplifier block and stop signal output. operation recovers automatically when the chip temperature drops to approximately 130 c. note that this circuit cannot always prevent breakdown or degradation, so sufficient care should be taken for using the ic. when the chip becomes abnormally hot, immediat ely turn off the power and determine the cause. 11. short-circuit between pins turning on the power supply with the short-circuit between terminals leads to the deterioration and destruction of ic. when fixing the ic to the substrate, please check that the solder is not shor t-circuited between th e terminals before turning on the power. 12. load short-circuit leaving the ic in the load short-circuit for many hours leads to the deterioration and destruction of the ic. the load must not be short-circuited absolutely. 13. maximum rating when the rated value used is just below to the absolute maximum ratings valu e, there is a possibility to exceed the maximum rating value with slight extrusion vari able. also, it can be a destructive accident. please use within the absolute maximum ratings with sufficient variation margin of supply voltage. in addition, the package of this ic has low thermal radiati on characteristics, so secure sufficient thermal radiation by providing a copper foil land on the printed circuit board near the heat sink. no.a1568-10/15
LV4985VH no.a1568-11/15 0.1 2 1 3 5 7 2 10 3 5 7 2 3 5 7 100 0.1 2 3 5 7 2 3 5 7 1 10 0.01 0.1 23 57 1 23 57 23 57 2357 100 23 57 1k 23 57 23 57 10k 10 0.01 0.1 1 --50 0 0.5 1 1.5 2 2.5 2 3 5 7 2 3 5 7 2 3 5 7 1k 23 57 10k 100 3 10 100k output power, p o -- mw t otal harmonic distortion , thd - - % 0 0.6 0.4 0.2 0.8 1.0 1.2 2 3 5 7 2 3 5 7 1.4 0 0.1 2 3 5 7 2 3 5 7 1.0 0.01 23 57 23 57 0.1 23 57 1 23 57 23 57 10 output power, p o -- w/ch thd -- vin 0.1 1 2 3 5 7 2 3 5 7 --120 -- 11 0 --100 --90 --80 --70 --60 10 --30 --28 --26 --24 --22 --20 --18 --16 --14 --12 --10 0.5 1 1.5 2.5 2 -- 8 input level , vin -- dbv total harmonic distortion , thd -- db volume - att -- v10cnt vmt -- fin --100 --80 --60 --40 --20 0 20 03 pin 10 control voltage , v10cnt -- v volume attenuation value , att -- db input frequency , fin -- hz mute control voltage , vmt -- dbv 0.01 0.1 23 57 11 0 output power, p o -- w/ch current drain, i cc -- a 10 100k frequency , f -- hz total harmonic distortion , thd -- % thd -- p o pin 10 control voltage , v10cnt -- v v no -- v10cnt thd -- f pd -- p o i cc -- p o power dissipation , pd - - w v cc = 5v p o = 200mw vg = 27.8db v10 = 3v v cc = 5v fin = 1khz v cc = 5v fin = 1khz v cc = 5v vin = -26dbv v10 = 0.3v, v9 = 2.3v v10 = 3v, v9 = 1.5v v10 = 3v, v9 = 0.3v
LV4985VH no.a1568-12/15 40 50 60 70 80 10 20 30 40 50 60 70 10 35 27 35 27 100 35 27 1k 35 27 10k 357 100 23 5 7 1k 23 5 7 10k 23 2 100k 0.1 1 80 --30 --20 --10 3020100 40 50 60 70 --20 --10 302010 04 0 5 0 6 0 80 --30 80 input frequency, fin -- hz 5 7 7 0 0 10 2 4 6 8 2 3 5 7 12 14 0 0.01 0.02 0.03 0.04 0.05 01 3 24 5 1 3 24 5 6 supply voltage, v cc -- v cco thd -- p o 0.1 1 2 3 5 7 2 3 5 7 10 2 3 5 7 50 60 55 65 70 75 100 10 100 23 57 23 57 1000 23 57 40 50 60 70 0102030 --20 --10 10000 output power, p o -- mw p o max -- ta chsep -- ta 0.8 1 1.2 1.4 1.6 --30 80 ambient temperature, ta -- c maximum output power, p o max -- w ambient temperature, ta -- c channel separation, chsep -- db 06 supply voltage, v cc -- v standby current drain, i stby -- a 10 100k frequency, f ? hz ripple rejection ratio, svrr -- db chsep -- fin ambient temperature, ta -- c thd -- ta svrr -- f i cco -- v cc i stby -- v cc channel separation, chsep - - db quiescent current drain, i -- ma total harmonic distortion, thd - - % total harmonic distortion, thd - - % no load no signal no load no signal v9 = 0.3v v cc = 5v v10 = 3v vin = -20dbv rg = 620 r l = 8 v cc = 5v v10 = 3v fin = 1khz r l = 8 vol-max vol-min v cc = 5v vin = -20dbv rg = 620 r l = 8 v10 = 3v v cc = 5v r l = 8 rg = 620 vg = 27.8dbv vrin = -20dbv cref = 1f v10 = 0.3v, v9 = 2.5v v10 = 3v, v9 = 2.5v v10 = 3v, v9 = 1.5v v cc = 5v r l = 8 vg = 27.8db 50c 25c ta = 80 c -25 c v cc = 5v r l = 8 p o = 0.2w vg = 27.8db
LV4985VH no.a1568-13/15 20 30 70 40 50 60 80 --100 --80 --60 --40 --20 0 20 --30 1 0.5 2 2.5 1.5 80 -- 11 0 0.48 --30 80 --30 80 ambient temperature , ta -- c ripple rejection ratio, svrr - - db 26 27 28 29 600 700 800 30 5 6 7 8 9 --30 80 ambient temperature , ta -- c v no -- ta 500 0.4 0.42 0.44 0.46 --70 --100 --90 --80 900 --30 80 ambient temperature , ta -- c v oltage gain, vg - - db v no -- ta v10cnt -- ta 50 60 90 70 80 --30 80 ambient temperature , ta -- c ambient temperature , ta -- c pin 10 control voltage , v10cnt -- v --30 100 ambient temperature , ta -- c voltage gain, vg -- db 03 control voltage , vvol -- v volume attenuation value , att -- db svrr -- ta ambient temperature , ta -- c vmt -- ta volume - att -- vvol vg -- ta volume - vg -- ta mute control voltage , vmt - - dbv v cc = 5v v9 = 2.5v mute mode v cc = 5v v10 = 3v vin = -30dbv fin = 1khz output : v cc = 5v vin = -30dbv --20 --10 302010 04 0 5 0 6 0 7 0 --20 --10 302010 04 0 5 0 6 0 7 0 --20 --10 302010 04 0 5 0 6 0 7 0 --20 --10 302010 04 0 5 0 6 0 7 0 --20 --10 302010 04 0 5 0 6 0 7 0 --20 --10 302010 04 0 5 0 6 0 7 0 --20 --10 302010 04 0 5 0 6 0 7 0 vol-min 25 c ta = 80 c -25 c vol-max v10 = 0.3v, v9 = 2.3v v10 = 3v, v9 = 0.3v v10 = 3v, v9 = 1.5v
LV4985VH 0.6 0.7 0.8 0.9 1 1.8 1.9 2 2.1 2.2 --30 80 ambient temperature, ta -- c pin 9 control voltage, v9cnt -- v 9 10 11 12 13 14 15 0.001 2 3 5 7 2 3 5 7 2 3 5 7 0.01 0.1 1 --30 80 ambient temperature, ta -- c quiescent current drain, i cco p -- ma --30 80 ambient temperature, ta -- c standby current drain, i stby -- a --30 80 ambient temperature, ta -- c pin 9 control voltage, v9cnt -- v v9cnt -- ta v9cnt -- ta i cco p -- ta i stby -- ta v cc = 5v v10 = 3v se mode v cc = 5v v10 = 3v btl mode v cc = 5v v9 = 2.5v v10 = 3v no load no signal v9 = 0.3v no signal --20 --10 302010 04 0 5 0 6 0 7 0 --20 --10 302010 04 0 5 0 6 0 7 0 --20 --10 302010 04 0 5 0 6 0 --20 --10 302010 04 0 5 0 6 0 7 0 7 0 v cc = 6v 5v no.a1568-14/15
LV4985VH ? transient response characteristics (volume max. setting) ps no.a1568-15/15 sanyo semiconductor co.,ltd. assumes no responsib ility for equipment failures that result from using products at values that exceed, even momentarily, rate d values (such as maximum ra tings, operating condition ranges, or other parameters) listed in products specif ications of any and all sanyo semiconductor co.,ltd. products described or contained herein. sanyo semiconductor co.,ltd. strives to supply high-qual ity high-reliability products, however, any and all semiconductor products fail or malfunction with some probability. it is possible that these probabilistic failures or malfunction could give rise to acci dents or events that could endanger human lives, trouble that could give rise to smoke or fire, or accidents that could cause dam age to other property. when designing equipment, adopt safety measures so that these kinds of accidents or e vents cannot occur. such measures include but are not limited to protective circuits and error prevention c ircuits for safe design, redundant design, and structural design. upon using the technical information or products descri bed 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 f or any claim or suits with regard to a third party's intellctual property rights which has resulted from the use of the technical information and products mentioned above. information (including circuit diagr ams and circuit parameters) herein is for example only; it is not guaranteed for volume production. any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. when designing equi pment, 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 c o.,ltd. products described or contained herein are controlled under any of applicable local export control laws and regulations, such products may require the export license from the authorities conc erned 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 in formation storage or retrieval system, or otherwise, without the prior written consent of sanyo semiconductor co.,ltd. ? transient response characteristics (volume mute. setting) 50ms/div 50ms/div 50ms/div 50ms/div load end : 50mv/div load end : 50mv/div first output pin : 1v/div first output pin : 1v/div pin 9 : 5v/div load end : 50mv/div first output pin : 1v/div pin 9 : 5v/div pin 9 : 5v/div load end : 50mv/div first output pin : 1v/div pin 9 : 5v/div rising (v9 ? high) characteristics falling (v9 ? low) characteristics rising (v9 ? high) characteristics falling (v9 ? low) characteristics this catalog provides information as of october, 2009. specifications and information herein are subject to change without notice.

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