1/19 www.rohm.com 2010.09 - rev. a ? 2010 rohm co., ltd. all rights reserved. small-sized class-d speaker amplifiers analog input monaural class-d speaker amplifier bd5468gul description bd5468gul is a monaural class-d speake r 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 consumpt ion that is why it?s 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. feature 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 bd5465/66/67gul (alc function, gain fixed goods) pin compatible specs 5) maximum gain: 13db (typ.) [during alc operation, 13 -2db@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) applications mobile phone, portable audio devic e, pnd, dsc, note-pc etc. absolute maximum rating (ta=+25 ) 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) operation range 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.10101eat08
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 s peaker load, if you don?t 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 34khz f 1 h 22 2 1 lc 2 1 fc ? ? ? ? ? ? ? ? shutdown signal c 2 sdnb b1 b2 vdd pvdd a1 c 1 c 3 a3 a2 b3 pgnd gnd c 3 10uf h: ic active l: ic shutdown 0. 1uf 0. 1uf +battery in + in - out + out - 150k (typ .) bias osc pwm h- bridge shutdown control ri ri r f r f a lc lpf ap aux-0025 audio precision (a p) measurement instrument btl c 2 c 1 audio precision (a p ) shutdown signal c 2 sdnb b1 b2 vdd pvdd a1 c 1 c 3 a2 b3 pgnd gnd c 3 10 uf 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
TCFGA1A106M8R 1 s1 slide switch 4mm x 10.2mm nkk ss-12sdp2 1 u1 ic, bd5468gul, mono class-d audio amplifier 1.7mm x 1.7mm wlcsp package rohm bd5468gul 1 pcb1 printed-circuit board, bd5468gul evm D D about the external part input coupling capacitor (c1, c2) input coupling capacitor is 0.1 f. input impedance during maximum gain 13db is 55k ? (typ.). a high-pass filter is composed by the input coupling capacitor and the input impedance. cut-off frequency?fc? by the formula below, through input coupling capacitor c1(=c2) and input impedance ri. in case of ri=55k ? , c1(=c2)=0.1 f, cut-off frequency is about 29hz 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. bd5468gul 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 connect to input signal connect to speaker connect to power supply (vdd=+2.5 5.5v) audio input vdd gnd [[[[ c1 ri 2 1 fc ? ? ? ?
embossed carrier tape tape quantity 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
