unisonic technologies co., ltd ta7368p linear integrated circuit www.unisonic.com.tw 1 of 7 copyright ? 2013 unisonic technologies co., ltd qw-r107-009.f 0.6w audio power amplifier ? description the utc ta7368p is suitable for the audio power amplifier of portable cassette tape recorder and radio. ? features * very few external components(only three capacitors) * low quiescent current * high voltage gain: gv=40db ? ordering information ordering number package packing lead free halogen free ta7368pl-d08-t ta7368pg-d08-t dip-8 tube TA7368PL-S08-T ta7368pg-s08-t sop-8 tube ta7368pl-s08-r ta7368pg-s08-r sop-8 tape reel ta7368pl-g09-t ta7368pg-g09-t sip-9 tube ta7368pl-r10-t ta7368pg-r10-t ssop-10 tube ta7368pl-r10-r ta7368pg-r10-r ssop-10 tape reel
ta7368p linear integrated circuit unisonic technologies co., ltd 2 of 7 www.unisonic.com.tw qw-r107-009.f ? pin configurations sop-8/dip-8 sip-9 ripple nf phase pre-gnd pwr-gnd nc v cc p out v in ssop-10
ta7368p linear integrated circuit unisonic technologies co., ltd 3 of 7 www.unisonic.com.tw qw-r107-009.f ? block diagrams note: pin connection dip-8/sop-8: pin :v cc sip-9: pin : nc, pin :v cc note: pin connection for ssop-10 package only.
ta7368p linear integrated circuit unisonic technologies co., ltd 4 of 7 www.unisonic.com.tw qw-r107-009.f ? absolute maximun ratings (t a =25 ? c) parameter symbol ratings unit supply voltage v cc 14 v power dissipation dip-8 p d 900 mw sip-9 950 sop-8/ssop-10 400 operating temperature t opr -20 ~ +75 ? c storage temperature t stg -55 ~ +150 ? c note: 1. 2. absolute maximum ratings are those values beyo nd which the device could be permanently damaged. absolute maximum ratings are stress ratings only an d functional device operat ion is not implied. derated ta>25 ? c, in the proportion of 7.2mw/ ? c ? electronic characteristics (t a =25 ? c, v cc =6v, f=1khz, rg=600 ? , r l =4 ? , unless otherwise specified) parameter symbol test conditions min typ max unit quiescent circuit current i ccq v cc =3v,v in =0 5.5 ma v cc =9v,v in =0 6.6 18 v cc =14v,v in =0 7.5 21 voltage gain g v v in =0.5mvrms 37 40 43 db output power p out v cc =3v,r l =4 ? ,thd=10% 120 mw v cc =6v,r l =4 ? ,thd=10% 500 720 v cc =9v,r l =8 ? ,thd=10% 800 1100 total harmonic distortion thd p out =100mw 0.3 1 % output noise voltage en r g =10k ? ,bpf=20hz~20khz 0.2 0.5 mvrms ripple rejection rr f r =100hz, v r =0.3vrms,crip=0 25 db input resistance r in 27 k ? ? terminal dc voltage typical terminal dc voltage at no signal with test circuit (v cc =6v, t a =25 ? c) pin no. 1 2 3 4 5 6 7 8 9 10 sop-8/dip-8 0 2.40 0.62 0.64 0 0 2.61 6.0 - - sip-9 0 2.40 0.62 0.64 0 0 2.61 nc 6.0 - ssop-10 nc 6.0 nc 0 2.40 0.62 0.64 0 0 2.61
ta7368p linear integrated circuit unisonic technologies co., ltd 5 of 7 www.unisonic.com.tw qw-r107-009.f ? precaution for application 1. input stage (figure 1) the input stage of power amplifier is comprised of a pnp differential pair( q2 and q3) preceded by a pnp emitter follower(q1) which allows dc referencing of the source si gnal to gnd. this eliminates the need for an input coupling capacitor. however, in case the brush noise of volume bec omes a problem, provide serially a coupling capacitor to the input side. 2. adjustment of the voltage gain (figure 2) the voltage gain is fixed at g v =40db by the resistors( r4 and r5) in ic. its reduction is possible through adding r f as shown in figure 2. in this case, the volt age gain is obtained by the following equation: g v =20log(r5+r4+ r f )/(r4+ r f ). it is recommended to use this ic with the voltage gain of g v =28db or over. figure 1 figure 2 figure 3 3. ripple rejection (figure 3) adding crip, to the ripple terminal 2 as shown in figure 3, t he ripple rejection ratio is improved from -25db to -45db. 4. power dissipation casre should be taken to use ic below maximum power dissipation because it may be over maximum rating depending on operating condition. p d =900mw (t a =25 ? c) 5. phase-compensation small temperature coefficient and excellent frequenc y characteristics is needed by capacitor below: *oscillation preventing capacitor for power amplifier output *bypass capacitor for ripple filter *capacitor between v cc and gnd
ta7368p linear integrated circuit unisonic technologies co., ltd 6 of 7 www.unisonic.com.tw qw-r107-009.f ? test circuits 27k 90 100 f 100 f 27k 90 100 f 100 f
ta7368p linear integrated circuit unisonic technologies co., ltd 7 of 7 www.unisonic.com.tw qw-r107-009.f utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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