NJM2792 ? 1 ? quad boost amplifier general description the NJM2792 is a quad boost amplifier designed for car audio system. it expands the frequency characteristics by high slew rate. it can swing 14v peak-to-peak output voltage at 9v. it consists of four channel non-inverting amplifier with the gain of 8db. it is suitable for car audio system and other boost amplifier system. features operating voltage (6 to 11v) operating current (12ma typ. ) boost output function (v o =14vpp:@v + =9v) maximum output voltage (4.5vrms typ., @ f=100khz ) supply voltage rejection ratio (50db typ. ) total harmonic distortion (0.003% typ. ) noise output voltage (5 vrms typ. ) bipolar technology package outline ssop20 block diagram package outline NJM2792v lift amp signal amp signal amp signal amp signal amp lift amp lf-in lr-in rf-in rr-in lf-out lr-out rf-out rr-out c ls c ls
NJM2792 ? 2 ? pin configuration no. symbol function no symbol function 1 l-gnd ground for left channel 11 r-gnd ground for right channel 2 l-cout capacitor for - level shift left channel 12 r-cin capacitor for + level shift right channel 3 fl-out output for front left channel 13 rr-out output for rear right channel 4 fl-fb - input for front left channel 14 rr-fb - input for rear right channel 5 fl-in + input for front left channel 15 rr-in + input for rear right channel 6 ref reference voltage 16 v+ power supply 7 fr-in + input for front right channel 17 rl-in + input for rear left channel 8 fr-fb - input for front right channel 18 rl-fb - input for rear left channel 9 fr-out output for front right channel 19 rl-out output for rear left channel 10 r-cout capacitor for - level shift right channel 20 l-cin capacitor for + level shift left channel 2 3 4 5 6 7 8 9 10 1 20 19 18 17 16 l-gnd l-cont fl-out ref fr-in fl-fb fl-in fr-fb fr-out r-cout l-cin rl-out rl-fb rr-in rr-fb v+ rr - out r-cin r-gnd 15 14 13 12 11 rl-in
NJM2792 ? 3 ? absolute maximum ranges (ta=25c) parameter symbol range unit supply voltage v + +15 v power dissipation p d 550 note: eia/jedec standard test board (76.2x114.3x1.6mm, 2layer, fr-4) mounting mw operating temperature topr -40 to +85 c storage temperature tstg -40 to +125 c electrical characterristic (v + =9v,ta=25c) parameter symbol test condition min. typ. max. unit dc characterristic operating voltage v + 6.0 9.0 11.0 v operating current i cc no signal - 12.0 18.0 ma output voltage v odc - 7.8 - v ac characterristic (f=1khz , vo=1vrms, r l =10k ? ) voltage gain av 7.5 8.0 8.5 db channel separation 1 cs1 r s =600 ? , v o =1vrms, f = 1khz, front channel vs. rear channel 70 80 - db channel separation 2 cs2 r s =600 ? , v o =1vrms, f = 1khz, l channel vs. r channel - 100 - db channel balance bal - - 0.5 db roll-off low frequency f rl -1db - 5 - hz roll-off high frequency f rh -1db 100 - - khz input resistance r in 44 60 76 k ? output resistance r out - 2 - ? maximum output voltage 1 v om1 thd=0.1%, f = 1khz 5.0 5.2 - vrms maximum output voltage 2 v om2 thd=1%, f = 100khz - 4.5 - vrms noise output voltage v no rs=0 ? , a-weighting - 5 10 vrms thd1 f=1khz , v o =3vrms, a-weighting - 0.003 0.01 % total harmonic distortion thd2 f=17hz to 20khz , v o =3vrms, a-weighting - 0.01 - % svr1 rs=0 ? , f=1khz , v rp =100mvrms 55 - - db supply voltage rejection ratio svr2 rs=0 ? , f=20hz to 20khz , v rp =100mvrms - 50 - db
NJM2792 ? 4 ? ! ! ! ! terminal description pin no. symbol function equivalent circuit terminal dc voltage 2 10 l-cout r-cout capacitor for - level shift left channel capacitor for - level shift right channel (v + -1.4)x0.09 [v] 12 20 3 9 13 19 r-cin l-cin fl-out fr-out rr-out rl-out capacitor for + level shift right channel capacitor for + level shift left channel output for front left channel output for front right channel output for rear right channel output for rear left channel v + -0.7 [v] (12,20pin) v + -1.4 [v] (3,9,13,19pin) 4 8 14 18 5 7 15 17 fl-fb fr-fb rr-fb rl-fb fl-in fr-in rr-in rl-in - input for front left channel - input for front right channel - input for rear right channel - input for rear left channel + input for front left channel + input for front right channel + input for rear right channel + input for rear left channel (v + -1.4)x0.4 [v] 12k ? 2pin, 10pin 2k ? 2k ? 5pin, 7pin, 15pin, 17pin 4pin, 8pin, 14pin, 18pin 300 ? 300 ? 60k ? 12pin, 20pin 3pin, 9pin, 13pin, 19pin 8.5k ? 8.5k ?
NJM2792 ? 5 ? ! ! ! ! terminal description pin no. symbol function equivalent circuit terminal dc voltage 6 ref reference voltage (v + -1.4)x0.6 [v] 24k ? 44k ? 46k ? 24k ? 44k ? 46k ? 6pin 300 ? 300 ?
NJM2792 ? 6 ? application circuit l-gnd l-cout fl-out fl-fb fl-in fr-in ref fr-fb fr-out r-cout l-cin rl-out rl-fb rl-in v+ rr-in rr-fb rr-out r-cin r-gnd 10 f 22 f 22 f 10 f 10 f 10 f 22 f 22 f 1.5nf 1.5nf r l =10k ? r l =10k ? r l =10k ? r l =10k ? 33k ? 22k ? 22k ? 33k ? 33k ? 33k ? 22k ? 22k ? 1 2 3 4 5 6 7 8 9 10 11 20 19 18 17 16 15 14 13 12 36k ? 24k ? 36k ? 24k ? 60k ? 60k ? 60k ? 60k ? 44k ? 24k ? 46k ? 44k ? 24k ? 46k ? lift amp signal amp signal amp front-left rear-left front-right rear-right signal amp signal amp lift amp + + + + + + + + + + + 100nf 47 f 22 f 220 f 220 f c ls c ls
NJM2792 ? 7 ? ! typical characteristics noise output voltage vs. ambient temperature (v + =9v, rs=0 ? , a-weighting filter) 0.0 10.0 20.0 30.0 40.0 -40 -20 0 20 40 60 80 100 120 140 ambient temperature [ o c] noise output voltage [vrms] voltage gain vs. frequency (v + =9v, r l =10k ? , vo=1vrms) 6.0 6.5 7.0 7.5 8.0 8.5 9.0 9.5 10.0 10 100 1000 10000 100000 frequency [hz] voltage gain [db] 85 o c -40 o c 25 o c dc output voltage vs. operating voltage (no signal, r s =0 , r l =10k ? 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 0 2 4 6 8 10 12 14 16 operating voltage [v] dc output voltage [v] -40 o c 25 o c 85 o c dc output voltage vs. ambient temperrature (no signal, r s =0 , r l =10k ? 0 2 4 6 8 10 12 14 16 -40 -20 0 20 40 60 80 100 120 ambient temperature [ o c] dc output voltage [v] v + =11v v + =9v v + =6v operating current vs. ambient temperature (no signal, r s =0 , r l =10k ? 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 -40 -20 0 20 40 60 80 100 120 ambient temperature [ o c] operating current [ma] v + =11v v + =9v v + =6v operationg current vs. operating voltage (no signal, r s =0 ? , r l =10k ? 0.0 2.0 4.0 6.0 8.0 10.0 12.0 14.0 16.0 0 2 4 6 8 10 12 14 16 operating voltage [v] operating current [ma] -40 o c 85 o c 25 o c
NJM2792 ? 8 ? ! typical characteristics maximum output voltage vs. operating voltage (r l =10k ? , f=1khz, thd=0.1%, lpf=80khz, ta=25 o c) 0 1 2 3 4 5 6 7 8 345678910111213 operating voltage [v] maximum output voltage [vrms] maximum output voltage vs. r l (v + =9v, f=1khz, thd=0.1%, ta=25 o c) 0 1 2 3 4 5 6 7 8 01234567891011 r l [k ? ] maximum output voltage [vrms] channel separation vs. frequency (v + =9v, rs=600 ? , r l =10k ? , ta=25 o c) 0 20 40 60 80 100 120 140 10 100 1000 10000 100000 1000000 frequency [hz] channel separation [db] diagonal channel ex.) front-l ch. vs . rear-r ch. left ch. vs. right ch. front ch. vs rear ch. thd+n vs. output voltage (v + =9v, r l =10k ? , c ls =220f, lpf=80khz, ta=25 o c) 0.001 0.01 0.1 1 10 0.01 0.1 1 10 output voltage [vrms] thd+n [%] 10khz 1khz 100hz thd+n vs. frequency (v + =9v, r l =10k ? , vo=3vrms, lpf=80khz, ta=25 o c) 0.001 0.01 0.1 1 10 10 100 1000 10000 100000 frequency [hz] thd+n [%] c ls =100f c ls =220f c ls =470f thd+n vs. frequency (v + =9v, r l =10k ? , c ls =220f, vo=3vrms, lpf=80khz) 0.001 0.01 0.1 1 10 10 100 1000 10000 100000 frequency [hz] thd+n [%] 85 o c 25 o c -40 o c
NJM2792 ? 9 ? ! typical characteristics [caution] the specifications on this databook are only given for information , without any guarantee as regards either mistakes or omissions. the application circuits in this databook are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. supply voltage rejection ratio vs. frequency (v + =9v, v rp =100mvrms, rs=0 ? , ta=25 o c) 0 10 20 30 40 50 60 70 80 10 100 1000 10000 100000 1000000 frequency [hz] svr [db]
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