s ilicore shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 1/6 ic for headphone stereos monolithic ic D665 general description D665 was developed for use in headphone stereos, and incorporates dual preamp, power amp, electronic vr and motor control circuits. it can be used in a simple circuit configuration which requires very few external components. features z broad operating voltage range of 2.0 to 5.0v (amp system operates to 1.8v) outline drawing z few external components required 1. internal equalizer resistance 2. direct coupling of preamps, electronic vr, power amp 3. no need for output coupling capacitor z well-balanced electronic vr, a-curve attenuation characteristic obtained with b-curve vr z internal motor control circuit , with noise from motor driving unit suppressed z provided with pin to turn off preamps z package: sop28 pin connection 28 27 26 25 24 23 22 21 20 19 18 17 16 15 gnd att in2 off pre filter vcc out2 off cont vcc2 rml adj pre pre nf2 pre in2 in2 out2 1 2 3 4 5 6 8 7 9 10 11 12 13 14 com att in1 vr vref out1 com gnd power m gnd motor+ on motor pre pre nf1 pre in1 in1 out1 D665
silicore D665 shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 2/6 block diagram note 1. the potentiometer for motor speed adjustment is 150hm (where the motor used is assumed to be m25e-7 (mitsumi)). note 2. rml (motor load correction resistance) note 3. when the preamp off pin is conne cted to +vcc, the preamp circuits are turned off. note 4.when the motor forced-on pin is co nnected to +vcc, the motor is turned on (no control). ca is a 100,000pf capacitor used to prevent oscillation in the 1/2 vcc and amp circuits. pin 15 and pin 16 are nc.
silicore D665 shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 3/6 absolute maximum ratings characteristics symbol rating unit operating temperature topr -20~65 c storage temperature tstg -40~125 c power supply current vcc max. -0.3~7.5 v power consumption pd 450 mw operating voltage vop 2.0~5.0 v electrical charateristics (except where noted otherwise,ta=25) characteristics symbol test conditions min. typ. max. unit consumption current icc vin=0v, im=0ma - 18 25 ma preamp. unit (ta=25c) open-circuit gain gvo vo=-10dbm,r l = ?t - 72 - db closed-circuit gain gvc vo=-10dbm 40 42 44 db maximum output voltage vom thd=10% 0.45 0.6 - vrms t otal harmonic distortion ratio thd vout=400mvrms - 0.05 0.5 % output noise voltage vno vin=0,rg=2.2k, bpf(30~20khz) - 150 300 vrms input impedance zin vout=-10dbm 18 22 - k ? cross-talk between channel c.t rg=2.2k,vout=-10dbm 30 - - db output voltage with pre off vooff vin=100mvrms - - -50 db output resistance with pre off rooff - - 10 - k ? input resistance on pre off rioff - - 10 - k ? attenuation unit(ta=25c) maximum input voltage vi max. - 0.2 - - vrms maximum attenuation va max . vcont=min. 66 - - db attenuation error vaerr vcont=max. - 0 - db input impedance zin - 15 20 - k ? control pin input resistance zicot - 100 - - k ?
silicore D665 shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 4/6 electrical charateristics continue characteristics symbol test conditions min. typ. max. unit power amp unit (ta=25c) vcc=3.0v,f=1khz, r l =16 ? , pre off=open voltage gain gv pout=5mw 26 28 30 db voltage gain difference between channels | gv vcont=max. - 0 3 db maximum output power 1 pom1 thd=10%,r l =32 ? 20 28 - mw maximum output power 2 pom2 thd=10%,r l =16 ? 30 - mw total harmonic distortion rati o thd pout=5mw - 0.2 2.0 % cross-talk between channel c.t pout=5mw 20 30 - db output noise voltage vn rg=2.2k, vcont=min - 0.25 1.0 mvrms ripple rejection r.r vcc=3v, 100hz, 100mvp-p 34 40 - db noise of pre amp+power amp vnto vin=0v,rg=2.2k, vcont=max. - 6 9 mvrms motor control unit(ta=25c) vcc=3.0v,im=100ma, motor unit : ( mitsumi model) consumption current imc - 3.0 5.0 ma startup current ims 500 - - ma reference voltage vref between rml-adj pins 0.72 0.80 0.87 v reference voltage fluctuation 1 vref1 vcc between 2.1 and 5.0v* - 0.05 - %/v reference voltage fluctuation 2 vref2 im between 25 and 250ma - 0.01 - %/ma reference voltage fluctuation 3 vref3 ta between -10and 50c - 0.01 - %/c current coefficient k 32 38 43 current coefficient fluctuation 1 k1 vcc between 2.1 and 5.0 v - 0.5 - %/v current coefficient fluctuation 2 k2 im between 25 and 250ma - 0.05 - %/ma current coefficient fluctuation 3 k3 ta between -10 and 50c - 0.02 - %/c output voltage on forced on vce sat im=200ma, 14pin=vcc - - 0.6 v input resistance on forced on rion - 5.6 - k ? leakage current on forced of f iml - - 200 a input resistance on forced of f ricon - 33 - k ? note 1: bass boost circuit constants are based on application circuit diagrams. note 2: motor pin voltage fluctuation. * voltage across pins 13 and 19(motor pins ) fluctuates.
silicore D665 shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 5/6 test circuits characteistics curves preamp attenuator
silicore D665 shaoxing silicore technology co.,ltd www. silicore. com. cn chmc 6/6 pout. power amp power amp power amp voltage gain vs. frequency
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