1/19 www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. sm all-s i zed class- d s p eak er amplif iers analog input monaural class-d s p eaker amplifier bd5466gul desc ri ptio n bd5466gul is a monaural class-d speaker amplifier that contained alc func tion for mobile phone, portable type electronic devices etc. lc filt er of speaker output is not needed, can form monaural speaker amplifier. with 3 external parts. alc, short for a utomatic l evel c ontrol, is a function that automatically adjust s up to the level of suppression of distortion (clip) of output wave form during excessive input. the time unt il the limit release operation of output level is called the release time (or recovery time). this ic adopts high-speed release time (4ms/1db typ.) and suits the application which repeats big volume in the short time such as the camera shutter sound. through class-d operation, efficiency is high low power consumption, that is why its suitable for battery drive application. the current consumption during shutdown when lowered to 0.01 a(typ.), from the shutdown to the operation time is early and at the same time pop sound is few that is why its also suitable in repeating active and shutdown. f e atu r e 1) contains digital alc (a utomatic l evel c ontrol) function 2) external parts: 3points 3) ultra slim type package: 9pin wl-csp(1.7 1.70.55mmmax.) 4) bd5460/61gul (no alc function, ga in fixed goods) pin compatible specs bd5465/67/68gul (alc function, gain fixed goods) pin compatible specs 5) maximum gain: 18db(typ.) [during alc operation, 18 3db@1db step] 6) alc high speed release(recovery) time: 4ms/1db(typ.) 7) limit output power : 0.7w (typ.) [vdd=4.2v, rl=8 ? , thd+n Q 1%] : 0.5w (typ.) [vdd=3.6v, rl=8 ? , thd+n Q 1%] 8) audio analog input (corresponds to single-end input / differential input) 9) output lc filter free 10) pop noise suppression circuit 11) shutdown function (use as mute at the same time) [low shutdown current = 0.01 a (typ.)] 12) contains protection circuit: output short, t hermal shutdown, under voltage lockout (uvlo) a p p lic ati o n s mobile phone, portable audio devic e, pnd, dsc, note-pc etc. a b s o lute maximu m rating(t a=+ 2 5 ) parameter symbol ratings unit power supply voltage vddmax pvddmax 7.0 v power dissipation pd 690 mw storage temperature range tstg -55 +150 sdnb pin input range v sdnb -0.3 vdd+0.3 v in+, in- pin input range v in -0.3 vdd+0.3 v in case ta=+25 or more, 5.52 mw decrease per 1 when mounting rohm typical board 50.0mm58.0mm (material: glass epoxy) o per ati on ra n ge parameter symbol range unit temperature topr -40 +85 power supply voltage vdd pvdd +2.5 +5.5 v common mode input voltage range v ic +0.5 vdd-0.8 v this product is not designed for protection against radioactive rays. no.10101eat06 downloaded from: http:///
technical note 2/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. e l ectr ic al c h a r act e rist ic (ta=+25 , vdd=+3.6v, unless specified otherwise) parameter symbol limits unit conditions min. typ. max. all device circuit current (no signal) i cc D 3 6 ma ic active, no load v sdnb =vdd circuit current (shutdown) i sdn D 0.01 2 a ic shutdown v sdnb =gnd audio feature limit output power p o 0.035 vdd 2 0.044 vdd 2 2 0.055 vdd 2 w btl, f=1khz, r l =8 ? thd+n Q 1% , * 1 total harmonic distortion t hd+n D 0.2 1 % btl, fin=1khz, r l =8 ? p o =0.3w , * 1 maximum gain g max 17 18 19 db btl, * 1 alc limit level v lim 1.5 vdd 1.68 vdd 1.89 vdd vpp btl, * 1 alc release level v rel 1.19 vdd 1.34 vdd 1.5 vdd vpp btl, * 1 switching frequency f osc 150 250 350 khz start-up time t on 0.73 1.02 1.71 msec audio input resistance ri 22 33.5 45 k ? gain=18db control terminal sdnb terminal threshold voltage h v sdnbh 1.4 D vdd v ic active l v sdnbl 0 D 0.4 v ic shutdown sdnb terminal inflow current h i sdbnh 12 24 36 a v sdnb =3.6v l i sdnbl -5 D 5 a v sdnb =0v * 1 filter bandwidth for measurement: 400 30khz, lc filter for ac measurement: l=22 h / c=1 f, btl: voltage between a3,c3 shutdown control control terminal conditions sdnb h ic operation (active) l ic stop (shutdown) alc parameter alc parameter attack time (typ.) release time(typ.) gain switch step (typ.) 1ms/1db @ fin=100hz 0.5ms/1db @ fin=1khz 0.05ms/1db @ fin=10khz 4ms/1db @ fin=100 10khz 1db the gain switch timing during alc operation occu rs at zero cross point of audio output voltage. for that, attack time, release time will change at input frequency fin. alc parameter is fixed. alc operation d oesnt correspond to noise of impulse. downloaded from: http:///
technical note 3/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. m eas ur ement circ u it dia gra m in case lc filter is not used in case lc filter is used audio characteristics can be measured to insert lc filt er between output pin and speaker load, if you dont have measurement equipment for switching amplif ier, like aux-0025, audio precision. arrange the lc filter direct ly close to output pin. in case of l=22 h, c=1 f, cut off frequency becomes: for inductor l, please use huge current type. (reference)tdk : slf12575t-220m4r0 shutdown signal c 2 sdnb b1 b2 vdd pvdd a1 c 1 c3 a3 a2 b3 pgnd gnd c3 10uf h : ic active l: ic shutdown 0 .1 uf 0 .1 uf +battery in + in - out + out - 150 k ( typ.) bias osc pwm h- bridge shutdown control ri ri r f r f a lc lpf ap aux - 0025 audio precision (a p ) measument instrument btl c 2 c 1 audio precision (a p ) shutdown signal c 2 sdnb b1 b2 vdd pvdd a1 c 1 c3 a2 b3 pgnd gnd c3 10uf h: ic active l: ic shutdown 0. 1uf 0. 1uf +battery in + in - 150k ( typ.) bias osc pwm h- bridge shutdown control ri ri r f r f a lc a3 c 2 c 1 btl 1uf 1uf 22uh 22uh 34khz f1 h 22 2 1 lc 2 1 fc ? ?? ? ? ? ? ? downloaded from: http:///
technical note 4/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. (unit : mm) 5466 lot no. ex te rn al d i m en si on di ag ra m b l o c k d i a g r a m p i n arr a n gem ent (b ottom v i e w ) p in e x p la nati o n pin no. pin name explanation a1 in+ audio differential input + terminal a2 gnd gnd terminal (signal) a3 out- class-d btl output - terminal b1 vdd vdd terminal (signal) b2 pvdd vdd terminal (power) b3 pgnd gnd terminal (power) c1 in- audio differential input - terminal c2 sdnb shutdown control terminal c3 out+ class-d btl output + terminal 9pin wl-csp(vcsp50l1) [ 1.7 1.7 0.55mm max, 0.5mm pitch ] top view bottom view side view in+ gnd out- vdd pvdd pgnd in- sdnb out+ a1 a2 a3 b1 b2 b3 c1 c2 c3 index post c2 sdnb b1 b2 vdd pvdd a1 c1 in+ in- c3 a3 out+ out- a2 b3 pgnd gnd 150k (typ.) bias osc pwm h- bridge shutdown control ri ri rf rf alc downloaded from: http:///
technical note 5/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. a p p lic ati on ci rcu i t e x amp l e short the power supply pin vdd (b1), pvdd (b2) at board pattern, then use singleness power supply. c2 sdnb b1 b2 vdd pvdd a 1 c1 c3 a 3 a 2 b3 pgnd gnd c 3 10 uf h :ic active l : ic shutdown shutdown signal + battery in+ in- out + out - 150k ( typ .) bias osc pwm h-bridge shutdown control ri ri r f r f a lc differential in p ut a udio input + a udio input - signal vdd singleness power supply(+2.5 +5.5v) power vdd power gnd signal gnd class-d btl output shutdown control audio differential input c2 sdnb b1 b2 vdd pvdd a 1 c1 c3 a 3 a 2 b 3 pgnd gnd c 3 10 uf h :ic active l: ic shutdown 0.1uf 0.1uf shutdown signal + battery in+ in- out + out - 150 k ( typ .) bias osc pwm h-bridge shutdown control ri ri r f r f a lc differential input a udio input + a udio input- class-d btl output power vdd signal vdd singleness power supply (+2.5 +5.5v) shutdown control signal gnd power gnd audio differential input fig1. differential input(with input coupling capacitor) fig2. differential input(without input coupling capacitor) downloaded from: http:///
technical note 6/19 bd5466gul www.rohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. c 2 sdnb b1 b2 vdd pvdd a 1 c 1 c3 a 3 a 2 b3 pgnd gnd c 3 10uf h :ic active l : ic shutdown 0.1uf a udio input 0.1uf shutdown signal + battery in + in - out + out - 150k( typ) bias osc pwm h- bridge shutdown control ri ri r f r f a lc signal gnd shutdown control signal vdd power vdd singleness power supply (+2.5 +5.5v) class-d btl output audio single end input c2 sdnb b1 b2 vdd pvdd a 1 c1 c 3 a 3 a 2 b3 pgnd gnd c3 10uf h : ic active l: ic shutdown 0. 1uf a udio input 0. 1uf shutdown signal + battery in + in - out + out - 150k( typ.) bias osc pwm h- bridge shutdown control ri ri r f r f a lc singleness power supply (+2.5 +5.5v) power vdd signal vdd shutdown control power gnd signal gnd class-d btl output audio single end input fig3. single end input (during in+ input) power gnd fig4. single end input (during in- input) downloaded from: http:///
technical note 7/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. a b o u t th e di f f er e n ce of dif f er enti a l in put and si ng le e n d inp u t ? bd5466gul uses full differential amplifier. bd5466gul is a class-d but, in relation to audio input and ou tput, is same with the conventional class-ab amplifier. for simplicity purposes of the diagram , the class-d amplifier output stage is omitted in the following explanation. about the resistor, signal on the diagram gives meaning to changes of gain setting by means of alc control. about single end input ? input is possible whether in+ or in- pin. dont make input pin open, through the input coupling capacitor, please connect to gnd as seen on the example above. audio input pin should make mute condition, not open condition when you dont input any signal. ? during single end input in+ and in-, there is a diff erence with the phase relation of input and output. because of differential amplifier, if i nput (in+ - in-), output(out+ - out-), t he audio input and output phase relation will become: phase in+ input in- input audio input ? output (out+ - out-) sa me phase opposite phase audio input 0v a1 in+ a3 out- c1 0v ` (out+ - out- ) c3 out+ in- ` audio input 0v a1 in+ a3 out- c1 0v ` c3 out+ in- ` 1) differential input audio input 0v a1 in+ a3 out- c1 (in+ - in- ) c3 out+ opposite phase in- audio input 0v 2) single end input (during in+input ) 3) single end input (during in-input ) opposite phase (in+ - in- ) s a m e p h a s e o p p o si te p h a se opposite phase opposite phase (in+ - in- ) (out+ - out- ) (out+ - out- ) downloaded from: http:///
technical note 8/19 bd5466gul www.rohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. gain calculation when input level is calculated at ic typical and audio source typical, when input coupling capacitor (ci) value is large enough, every gain during the differential input and single end input will become: typical input level differentia l output single end output ic formula audio source formula formula 1.ic reference(difference input, single end input): formula vin means the input voltage between ic input pin (in+, in -), vout means the output vo ltage between ic output pin (out+, out-). during differential input and single end input, the gain calculation formula at ic reference which includes alc operation is written below: gain = 20log | vout/vin | =+18 +3 (typ.) [db] ??? formula 2.audio source reference(dif ferential input): formula when the input level of audio source is vins, the relation with the input voltage vin between ic input pin is written below: vins = vin / 2 during differential input, at audio source reference that in cludes alc operation, gain calculation formula will become: gain = 20log | vout / vins | = 20log | 2vout / vin | = +25 +9 (typ.) [db] ??? formula 3.audio source reference (single end input): formula when the input level of audio source is vins, the relation with input voltage vin between ic input pin (in+,in-) becomes: vins = vin during single end input, at the audio source that incl udes alc operation, gain calculation formula becomes: gain = 20log | vout / vins | = 20log | vout / vin | = +18 +3 (typ.) [db] ??? formula differential input single end input c2 sdnb b1 b 2 vdd pvdd a 1 c1 c3 a 3 a 2 b 3 pgnd gnd cs h :ic active l : ic shutdown 0 .1 uf 0 .1 uf shutdown signal + battery in+ in- out+ out- 150 k (t yp.) bias osc pwm h- bridge shutdown control ri ri r f r f alc vins ci vins vin (= 2vins ) ci < a udio source > c2 sdnb b 1 b 2 vdd pvdd a 1 c1 c3 a 3 a 2 b 3 pgnd gnd cs h :ic active l: ic shutdown 0.1 uf 0.1 uf shutdown signal + battery in+ in- out+ out- 150 k (t yp.) bias osc pwm h- bridge shutdown control ri ri r f r f alc vins ci vin (= vins ) ci < audio source> downloaded from: http:///
technical note 9/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. a u d i o i n p u t p i n e x t e rn al lpf c o n nect i o n e x am pl e external lpf connection example the connection example of 1 st -order lpf which is formed at resistor r lpf and capacitor c lpf , to the audio input pin in+/- (a1, c1 pin) is shown below. the cut frequency of input lpf, together with the single end input and differential input is written below: fc lpf = 1 / (2 r lpf c lpf ) [hz] ex) fc lpf =10khz ? c lpf =0.01 f, r lpf =1.59k ? 1) during single end input when lpf is connected to audio input pin at single end input setting, at start-up characterist ics of audio input pin in+/-, during start-up with unbalance (power supply on/off, or s hutdown on/off), there is a risk that pop sound will occur so please be careful. when no audio input, and in order to prevent output noise, please make previous ic mute condition, not open condition. please refer at the same time to pop sound countermeasure example. c 2 sdnb b1 vdd b2 pvdd a 1 in + c 1 in - c3 a 3 a 2 b3 gnd pgnd ci ci cs out + out - speake r + battery c lpf r lpf ro front ic c lpf r lpf h : ic active l: ic shutdown shutdown signal 150 k ( typ .) ri ri a lc bias osc pwm h- bridge shutdown control r f r f pop sound countermeasure input impedance downloaded from: http:///
technical note 10/19 bd5466gul www.rohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. 2) differential input caution during external lpf setting external lpf resistor r lpf which is composed of ic input resistor ri, forms input impedance. the bigger the resistor value of lpf resistor r lpf, the more it will decrease the gain. when the input capacitor ci has enough large capacity value, the relation among external lpf resistor r lpf and ic input resistor ri and gain will become: gain = 20log | rf / (ri + r lpf ) | [db] input resistor ri of bd5466gul and resistor value of feedback resistor rf will become the following below, during alc operation, changes at 1db st ep, and becomes 16 stages switch specs. #1. ri=33.5k ? (typ.), rf=266.5k ? (typ.)@gain=18db #2. ri=37k ? (typ.), rf=263k ? (typ.)@gain=17db #3. ri=41k ? (typ.), rf=259k ? (typ.)@gain=16db #15. ri=116k ? (typ.), rf=184k ? (typ.)@gain=4db #16. ri=124k ? (typ.), rf=176k ? (typ.)@gain=3db also with the driver ability of previous ic step, after checking, constant setting of external lpf and resistor r lpf. c 2 sdnb b1 vdd b2 pvdd a 1 in+ c 1 in- c 3 a 3 a 2 b3 gnd pgnd cici cs out + out - speaker +battery c lpf c lpf r lpf r lpf ro ro h : ic active l: ic shutdown shutdown signal front ic lpf 150 k ( typ .) ri ri a lc bias osc pwm h- brid g e shutdown control r f r f input impedance downloaded from: http:///
technical note 11/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. ev al u a tio n bo ar d ci rcu i t dia gr am power supply terminals vdd(b1), pvdd(b2) are short in the board pattern and use a single power. ev al u a tio n bo ar d part s list qty. item description smd size manufacturer/ part number 2 c1, c2 capacitor, 0.1 f 0603 murata grm188r71c104ka01d 1 c3 capacitor, 10 f a (3216) rohm tcfga1a106m8r 1 s1 slide switch 4mm x 10.2mm nkk ss-12sdp2 1 u1 ic, bd5466gul, mono class-d audio amplifier 1.7mm x 1.7mm wlcsp package rohm bd5466gul 1 pcb1 printed-circuit board, bd5466gul evm D D about the ex ternal p a rt input coupling capacitor (c1, c2) input coupling capacitor is 0.1 f. input impedance during maximum gain 18db is 33.5k ? (typ.). a high-pass filter is composed by the input coupling capacitor and the input impedance. cut-off frequencyfc by the formula below, through input coupling capacitor c1(=c2) and input impedance ri. in case of ri=33.5k ? , c1(=c2)=0.1 f, cut-off frequency is about 48hz power supply decoupling capacitor (c3) power supply decoupling capacitor is 10uf. when the capacity value of power supply decoupling capacitor is made small, it will have an influence to the audio characteristics. when making it small, be careful with the audio characteristics at actual application. esr (equ ivalent series resistor) is low enough; please use capacitor with capacity value of 1 f or more. b d 54 66 g u l c2 sdnb b1 b2 vdd pvdd a1 c1 in+ in- c3 a3 out+ out- a2 b3 pgnd gnd c1 differential input h ic active l ic shutdown audio input+ audio input- c2 0.1uf 0.1uf c3 10uf vdd shutdown signal 150k (typ.) bias osc pwm h- bridge shutdown control ri ri rf rf alc connect to gnd c o nn ect to i nput s i g n a l connect to s p eaker connect to pow e r suppl y (vdd=+2.5 5.5v) audio input vdd gnd [] ? ? ? downloaded from: http:///
technical note 12/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. ev aluation boar d pcb la y e r top layer silk pattern top layer bottom layer bd54 66 gul downloaded from: http:///
technical note 13/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. about ic t h ermal design the ic characteristics has a big relation with the temperatur e that will be used, to exceed the maximum tolerance junction temperature, can deteriorate and destroy i t. instant destruction and long-time operatio n, from these 2 standpoints, there is a need to be careful with regards to ic thermal. please be careful with the next points. the absolute maximum rating of ic shows the maximum junction temperature (tj max .) or the operation temperature range (topr), so refer to this value, use pd-ta characteristics (thermal reduction ratio curve). if input signal is excessive at a st ate where heat radiation is not sufficien t, there will be tsd(thermal shutdown) for tsd, the chip temperat ure operates at around 180 , releases if its around 120 or less. since the aim is to prevent damage on the chip, please be careful because the long use time at the vicinity where tsd operates can deteriorate the dependency of the ic. t herma l re du ction r a ti o cu rve the value of power dissipation changes based on the board that will be mounted. the power dissipation of main ic during the heat dissipati on design of many mounted boards, will become bigger than the value of the above graph. measurement condition : rohm typical board mount board size : 50mmx58mm note : this value is the real measurement, but not the guaranteed value . reference data vcsp50l1 2.0 1.5 1.0 0.5 0.0 0 25 50 75 100 125 150 perimeter temperature ta( ) power dissipation pd(w) 0.69w ja = 181.8 /w 85 downloaded from: http:///
technical note 14/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. e v a lua tion da ta - t y p i ca l c h a r a c t e r i sti c s ( 1/4 ) = l= [] [%] = = = = l= [] [] = = = = l= [] [%] = = = = l= [] [] = = = a = l= [] [] = = = a = l= [] [] = = = = = = = = = = = = = = = = = = = = = l= a a [] [] l= a a [] [] ev al u a tio n data C t y p i c a l ch ar acter i stic s (1/ 4 ) fig.5 fig.6 fig.7 fig.8 fig.9 fig.10 fig.11 fig.12 downloaded from: http:///
technical note 15/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. e v a l ua tion da ta - t y pica l c h a r a cte ri stics ( 2/ 4 ) l= = [] [] Q% la a =% = l[] [] = = = a a = l= [] [%] = = = l= = [] [] Q% a a = l= [] [%] = = = = = = = = = = = = a a l= = [] [%] = = = a a l= = [] [%] = = = = = = = = = ev al u a tio n data C t y p i c a l ch ar acter i stic s (2/ 4 ) fig.13 fig.14 fig.15 fig.16 fig.17 fig.18 fig.19 downloaded from: http:///
technical note 16/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. e v a l ua tion da ta - t y pica l c h a r a cte ri stics ( 3/ 4 ) a a l l== [] [%] = = = l l= = [] [] = = = a a l l== [] [%] = = = l l= = [] [] = = = a l= = [] a [] = = = a l= = [] a [] = = = a a = l= [] [%] = = = a a l= = [] [%] = = = = = = = = = = = = = = = = = = = = = = = = = = = ev al u a tio n data C t y p i c a l ch ar acter i stic s (3/ 4 ) fig.20 fig.21 fig.22 fig.23 fig.24 fig.25 fig.26 fig.27 downloaded from: http:///
technical note 17/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. e v a l u a t i on da t a - t y pica l c h a r a c t e risti cs ( 4/ 4 ) a [] a a [] l l a a = [] l a a a = [] a ev al u a tio n data C t y p i c a l ch ar acter i stic s (4/ 4 ) fig.28 fig.29 fig.30 fig.31 downloaded from: http:///
technical note 18/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. n o te s fo r use (1) the numerical value and the data of the mention are a design representative value and are not the one which guarantees the value. (2) it is convinced that it should recommend application circuit example but in case of use, we request the confirmation of the characteristic more sufficiently. when changing an external part fixed number and becoming us e, it considers sprawl of the external part and our company's lsi in cluding the transition characteristic in addition to the stillness characteristic and so on, see and fix an enough margin. (3) absolute maximum ratings this ic may be damaged if the absolute maximum ratings fo r the applied voltage, tem perature range, or other parameters are exceeded. therefore, av oid using a voltage or temperature that exceeds the absolute maximum ratings. if it is possible that absolute maximum ratings will be exce eded, use fuses or other physical safety measures and determine ways to avoid exceeding the ic's absolute maximum ratings. (4) gnd terminals potential try to set the minimum voltage for gnd terminal s potential, regardless of the operation mode. (5) shorting between pins and mounting errors when mounting the ic chip on a board, be very careful to set the chip's orientation and position precisely. when the power is turned on, the ic may be damaged if it is not mo unted correctly. the ic may also be damaged if a short occurs (due to a foreign object, etc.) between two pins, between a pin and the power supply, or between a pin and the gnd. (6) operation in strong magnetic fields note with caution that operation faults may occur when this ic operates in a strong magnetic field. (7) thermal design ensure sufficient margins to the thermal design by taking in to account the allowable power dissipation during actual use modes, because this ic is power amplifier. when excessive signal inputs which the heat dissipation is insufficient condition, it is possible that thermal shutdown circuit is active. (8) thermal shutdown circuit this product is provided with a built-in thermal shutdown circuit. when the the rmal shutdown circuit operates, the output transistors are placed under open status. the thermal shutdown circuit is primarily intended to shut down the ic avoiding thermal runaway under abnormal conditions with a chip temperature exceeding t jmax =+150 , and is not intended to protect and secure an electrical appliance. (9) load of the output terminal this ic corresponds to dynamic speaker load, and doesn't correspond to the load except for dynamic speakers. when using speaker load 8 ? or less (especially 4 ? ), there will be a risk of generating distor tion at the speaker output wave form during alc limit operation. (10) the short protecti on of the output terminal this ic is built in the short protection for a protection of output transistors. when the short protecti on is operated, output terminal become hi-z condition and is stopped with latch. once output is stopped with la tch, output does not recover automatically by canceling the short-circ uiting condition. the condition of stoppi ng with latch is cancelled, when power supply or mute signal is turned off and turned on again. (11) operation range the rated operating power supply voltage range (vdd=+2.5v +5.5v) and the rated operating temperature range (ta=-40 +85 ) are the range by which basic circuit functions is operated. characteristics and rated output power are not guaranteed in all power supply voltage ranges or temperature ranges. (12) electrical characteristics every audio characteristics list of the lim it output power, total harmonic distorti on, maximum gain, alc limit level, alc release level etc. shows the typical characteristics of the device, highly dependent to the board lay-out, parts to be used, power supply. the value when the device and each comp onent are directly mounted to the board of rohm. (13) power supply since the power supply pin for signal (vdd) and power supply for power (pvdd) is short at internal, short the board pattern, then use a single power supply. also, the power supply line of class-d speaker amplifier flows big peak energy. it will influence the audio characteristics based on the capacity value of power supply decoupling capacitor, arrangement. for the power supply decoupling capacitor, please arrange appropriately the low capacity (1 f or more) of esr (equivalent series resistor) directly near to ic pin. (14) alc (a utomatic l evel c ontrol) function the alc automatically adjusts the audio ou tput level, and a function t hat prevents the over out put to the speaker. when alc function is working, gain switches at zero-cross point of audio output normally. if the time that audio output reaches to zero-cross point is long, gain switch es at about 1msec later (attack time), at about 25msec later (release time). so, attack time and release time will change at audio input fr equency. alc parameter is fixed. the system does not correspond to noise of impulse. also, alc limit control will become a power supply tracki ng type, limit output power is dependent to power supply voltage. the alc characteristics of limit output power, alc lim it and release limit will be influenced by the shaking so please be careful. downloaded from: http:///
technical note 19/19 bd5466gul www. r ohm.com 2010.09 - rev . a ? 2010 rohm co., ltd. all rights reserved. or der in g p a rt n u mb er b d 5 4 6 6 g u l - e 2 part no. part no. package gul: vcsp50l1 packaging and forming specification e2: embossed tape and reel ? order quantity needs to be multiple of the minimum quantity. embossed carrier tape tapequantity direction of feed the direction is the 1pin of product is at the upper left when you hold reel on the left hand and you pull out the tape on the right hand 3000pcs e2 () direction of feed reel 1pin (unit : mm) vcsp50l1 (bd5466gul) s 0.06 s a b ba 0.05 1pin mark 3 0.350.05 9- 0.250.05 1.700.05 2 ( 0.15)index post c 1 0.350.05 b 0.55max 1.700.05 a 0.10.05 p=0.5 2 p=0.5 2 downloaded from: http:///
datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. notice precaution on using rohm products 1. our products are designed and manufac tured for application in ordinary elec tronic equipments (such as av equipment, oa equipment, telecommunication equipment, home electroni c appliances, amusement equipment, etc.). if you intend to use our products in devices requiring ex tremely high reliability (such as medical equipment (note 1) , transport equipment, traffic equipment, aircraft/spacecra ft, nuclear power controllers, fuel c ontrollers, car equipment including car accessories, safety devices, etc.) and whose malfunction or failure may cause loss of human life, bodily injury or serious damage to property (specific applications), please consult with the rohm sale s representative in advance. unless otherwise agreed in writing by rohm in advance, rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of any ro hms products for specific applications. (note1) medical equipment classification of the specific applications japan usa eu china class class class b class class class 2. rohm designs and manufactures its products subject to strict quality control system. however, semiconductor products can fail or malfunction at a certain rate. please be sure to implement, at your own responsibilities, adequate safety measures including but not limited to fail-safe desi gn against the physical injury, damage to any property, which a failure or malfunction of our products may cause. the following are examples of safety measures: [a] installation of protection circuits or other protective devices to improve system safety [b] installation of redundant circuits to reduce the impact of single or multiple circuit failure 3. our products are designed and manufactured for use under standard conditions and not under any special or extraordinary environments or conditio ns, as exemplified below. accordin gly, rohm shall not be in any way responsible or liable for any damages, expenses or losses arising from the use of an y rohms products under any special or extraordinary environments or conditions. if you intend to use our products under any special or extraordinary environments or conditions (as exemplified below), your independent verification and confirmation of product performance, reliability, etc, prior to use, must be necessary: [a] use of our products in any types of liquid, incl uding water, oils, chemicals, and organic solvents [b] use of our products outdoors or in places where the products are exposed to direct sunlight or dust [c] use of our products in places where the products ar e exposed to sea wind or corrosive gases, including cl 2 , h 2 s, nh 3 , so 2 , and no 2 [d] use of our products in places where the products are exposed to static electricity or electromagnetic waves [e] use of our products in proximity to heat-producing components, plastic cords, or other flammable items [f] sealing or coating our products with resin or other coating materials [g] use of our products without cleaning residue of flux (ev en if you use no-clean type fluxes, cleaning residue of flux is recommended); or washing our products by using water or water-soluble cleaning agents for cleaning residue after soldering [h] use of the products in places subject to dew condensation 4. the products are not subjec t to radiation-proof design. 5. please verify and confirm characteristics of the final or mounted products in using the products. 6. in particular, if a transient load (a large amount of load applied in a short per iod of time, such as pulse. is applied, confirmation of performance characteristics after on-boar d mounting is strongly recomm ended. avoid applying power exceeding normal rated power; exceeding the power rating under steady-state loading c ondition may negatively affect product performance and reliability. 7. de-rate power dissipation (pd) depending on ambient temper ature (ta). when used in seal ed area, confirm the actual ambient temperature. 8. confirm that operation temperat ure is within the specified range described in the product specification. 9. rohm shall not be in any way responsible or liable for fa ilure induced under deviant condi tion from what is defined in this document. precaution for mounting / circuit board design 1. when a highly active halogenous (chlori ne, bromine, etc.) flux is used, the resi due of flux may negatively affect product performance and reliability. 2. in principle, the reflow soldering method must be used; if flow soldering met hod is preferred, please consult with the rohm representative in advance. for details, please refer to rohm mounting specification downloaded from: http:///
datasheet d a t a s h e e t notice - ge rev.002 ? 2014 rohm co., ltd. all rights reserved. precautions regarding application examples and external circuits 1. if change is made to the constant of an external circuit, pl ease allow a sufficient margin considering variations of the characteristics of the products and external components, including transient characteri stics, as well as static characteristics. 2. you agree that application notes, re ference designs, and associated data and in formation contained in this document are presented only as guidance for products use. theref ore, in case you use such information, you are solely responsible for it and you must exercise your own independent verification and judgment in the use of such information contained in this document. rohm shall not be in any way responsible or liable for any damages, expenses or losses incurred by you or third parties arising from the use of such information. precaution for electrostatic this product is electrostatic sensitive product, which may be damaged due to electrostatic discharge. please take proper caution in your manufacturing process and storage so that voltage exceeding t he products maximum rating will not be applied to products. please take special care under dry condit ion (e.g. grounding of human body / equipment / solder iron, isolation from charged objects, se tting of ionizer, friction prevention and temperature / humidity control). precaution for storage / transportation 1. product performance and soldered connections may deteriora te if the products are stor ed in the places where: [a] the products are exposed to sea winds or corros ive gases, including cl2, h2s, nh3, so2, and no2 [b] the temperature or humidity exceeds those recommended by rohm [c] the products are exposed to di rect sunshine or condensation [d] the products are exposed to high electrostatic 2. even under rohm recommended storage c ondition, solderability of products out of recommended storage time period may be degraded. it is strongly recommended to confirm sol derability before using products of which storage time is exceeding the recommended storage time period. 3. store / transport cartons in the co rrect direction, which is indicated on a carton with a symbol. otherwise bent leads may occur due to excessive stress applied when dropping of a carton. 4. use products within the specified time after opening a humidity barrier bag. baking is required before using products of which storage time is exceeding the recommended storage time period. precaution for product label qr code printed on rohm products label is for rohms internal use only. precaution for disposition when disposing products please dispose them proper ly using an authorized industry waste company. precaution for foreign exchange and foreign trade act since our products might fall under cont rolled goods prescribed by the applicable foreign exchange and foreign trade act, please consult with rohm representative in case of export. precaution regarding intellectual property rights 1. all information and data including but not limited to application example contained in this document is for reference only. rohm does not warrant that foregoi ng information or data will not infringe any intellectual property rights or any other rights of any third party regarding such information or data. rohm shall not be in any way responsible or liable for infringement of any intellectual property rights or ot her damages arising from use of such information or data.: 2. no license, expressly or implied, is granted hereby under any intellectual property rights or other rights of rohm or any third parties with respect to the information contained in this document. other precaution 1. this document may not be reprinted or reproduced, in whol e or in part, without prior written consent of rohm. 2. the products may not be disassembled, converted, modified, reproduced or otherwise changed without prior written consent of rohm. 3. in no event shall you use in any wa y whatsoever the products and the related technical information contained in the products or this document for any military purposes, incl uding but not limited to, the development of mass-destruction weapons. 4. the proper names of companies or products described in this document are trademarks or registered trademarks of rohm, its affiliated companies or third parties. downloaded from: http:///
datasheet datasheet notice C we rev.001 ? 2014 rohm co., ltd. all rights reserved. general precaution 1. before you use our pro ducts, you are requested to care fully read this document and fully understand its contents. rohm shall n ot be in an y way responsible or liabl e for fa ilure, malfunction or acci dent arising from the use of a ny rohms products against warning, caution or note contained in this document. 2. all information contained in this docume nt is current as of the issuing date and subj ec t to change without any prior notice. before purchasing or using rohms products, please confirm the la test information with a rohm sale s representative. 3. the information contained in this doc ument is provi ded on an as is basis and rohm does not warrant that all information contained in this document is accurate an d/or error-free. rohm shall not be in an y way responsible or liable for an y damages, expenses or losses incurred b y you or third parties resulting from inaccur acy or errors of or concerning such information. downloaded from: http:///