mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 1/10 www.mosanalog.com mono 1.1w power amplifier with shutdown, low voltage operation features ? operation range: 2.5v ~ 6.5v ? shutdown current 0.1ua at 6v ? psrr at 217hz, 60db at 5v ? output power, thd+n=1% r l =8 ? , 1.5w at 6v, 1.1w at 5v, 0.4w at 3.3v, 200mw at 2.5v ? unity-gain stable ? space-saving sop8 , msop8 applications ? portable electronic devices ?pdas ? communication headsets cross-reference lm4891 description the MS6891 is a low distortion po wer amplifier that can drive 1.5w 6v of continuous average power into a mono 8 ? bridged-tied load (btl). operation with 2.5v supply, it can drive 200mw into a mono 8 ? . the btl configuration eliminates the need for external coupling capacitors on the output in most applications. the MS6891 is unity-gain stable and can be configured by external gain-setting resistors. the MS6891 has good feature for portab le equipment, these features include the low voltage operation, micropower consumption shutdown mode, small package sop8, msop8, make the MS6891 ideally suited for use in p ortable electronic equipments. block diagram a2 - + -in gnd v dd bp shdn vo1 +in a1 - + bias control 6 1 2 3 4 8 vo2 5 7 - +
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 2/10 www.mosanalog.com pin configuration symbol pin description shdn 1 shutdown places the entire device in shutdown mode when held high. ttl compatible input. bp 2 bypass is the cap to the voltage divider for internal mid-supply bias. this terminal should be connected to a 0.1- f to 10- f capacitor c bp . +in 3 non-inverting input -in 4 inverting input vo1 5 btl negative output v dd 6 supply voltage gnd 7 ground vo2 8 btl positive output sop8, msop8 7 6 5 8 2 3 4 1 vo2 gnd v dd vo1 shdn bp +in -in ordering information package part number packag ing marking transport media 8-pin sop (lead free) MS6891gtr 6891g 2.5k units tape and reel 8-pin sop (lead free) MS6891gu 6891g 100 units tube 8-pin msop (lead free) MS6891mgtr 6891g 3.5k units tape and reel 8-pin msop (lead free) MS6891mgu 6891g 80 units tube absolute maximum ratings symbol parameter rating unit v dd supply voltage 6.5 v v esd electrostatic handling 3500 v t stg storage temperature range -65 to 150 t a operating ambient temperature range -40 to 85 t j maximum junction temperature 150 t s soldering temperature, 10 seconds 260 r thja thermal resistance from junction to ambient in free air sop8 msop8 210 50 /w
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 3/10 www.mosanalog.com operating ratings symbol parameter min typ max unit v dd supply voltage 2.5 5 6.5 v 6v electrical characteristics ta = 25c, v dd =6v, f=1khz, bw<30khz, unless otherwise specified. symbol parameter conditions min typ max unit i q quiescent current v in =0v, i o =0a - 3 - ma i shdn shutdown current v shdn = 6v - 0.1 - ua v sdh shutdown input voltage high 2.0 - - v v sdl shutdown input voltage low - - 0.8 v psrr power supply rejection ratio r l =8 , c bp =1uf, f=217hz - 55 - db - -54 -50 db thd+n total harmonic distortion plus noise r l =8 , 1.5w - 0.2 0.316 % s/n signal-to-noise ratio r l =8 , 1.5w 95 108 - db po output power r l =8 , thd+n = 1% - 1.5 - w 5v electrical characteristics ta = 25c, v dd =5v, f=1khz, bw<30khz, unless otherwise specified. symbol parameter conditions min typ max unit i q quiescent current v in =0v, i o =0a - 2.6 - ma i shdn shutdown current v shdn =5v - 0.1 - ua psrr power supply rejection ratio r l =8 , c bp =1uf, f=217hz - 60 - db - -54 -50 db thd+n total harmonic distortion plus noise r l =8 , 1.1w - 0.2 0.316 % s/n signal-to-noise ratio r l =8 , 1.1w 90 103 - db po output power r l =8 , thd+n = 1% - 1.1 - w 3.3v electrical characteristics ta = 25c, v dd =3.3v, f=1khz, bw<30khz, unless otherwise specified. symbol parameter conditions min typ max unit i q quiescent current v in =0v, i o =0a - 2.3 - ma i sd shutdown current v shdn =3.3v - 0.1 - ua psrr power supply rejection ratio r l =8 , c bp =1uf, f=217hz - 60 - db - -55 -50 db thd+n total harmonic distortion plus noise r l =8, 0.4w 0.17 0.316 % s/n signal-to-noise ratio r l =8 , 0.4w 90 100 - db po output power r l =8 , thd+n = 1% - 0.4 - w
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 4/10 www.mosanalog.com 2.5v electrical characteristics ta = 25c, v dd =2.5v, f=1khz, bw<30khz, unless otherwise specified. symbol parameter conditions min typ max unit i q quiescent current v in =0v, i o =0a - 2.2 - ma i sd shutdown current v shdn =2.5v - 0.1 - ua psrr power supply rejection ratio r l =8 , c bp =1uf, f=217hz - 60 - db - -55 -50 db thd+n total harmonic distortion plus noise r l =8 , 0.2w - 0.17 0.316 % s/n signal-to-noise ratio r l =8 , 0.2w 90 98 - db po output power r l =8 , thd+n = 1% - 0.2 - w typical performance characteristics ta = 25c, bw<30khz, unless otherwise specified. thd+n (%) frequency (hz) thd+n (%) frequency (hz) thd+n (%) frequency (hz) thd+n vs. frequency thd+n vs. frequency thd+n vs. frequency po=1.5w po=0.4w po=1.1w v dd =6v r l =8 ? v dd =5v r l =8 ? v dd =3.3v r l =8 ? thd+n (%) frequency (hz) thd+n (%) output power (w) thd+n (%) output power (w) f=20khz f=20khz f=1khz f=1khz po=0.2w f=20hz f=20hz v dd =2.5v r l =8 ? v dd =6v r l =8 ? v dd =5v r l =8 ? thd+n vs. frequency thd+n vs. output power thd+n vs. output power
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 5/10 www.mosanalog.com thd+n (%) output power (w) thd+n (%) output power (w) psrr (db) frequency (hz) thd+n vs. output power thd+n vs. output power psrr vs. frequency f=20khz f=20khz c bp =10uf f=1khz f=1khz c bp =1uf f=20hz f=20hz v dd =3.3v r l =8 ? v dd =2.5v r l =8 ? v dd =6v r l =8 ? psrr (db) frequency (hz) psrr (db) frequency (hz) psrr (db) frequency (hz) psrr vs. frequency psrr vs. frequency psrr vs. frequency c bp =10uf c bp =10uf c bp =10uf c bp =1uf c bp =1uf c bp =1uf v dd =5v r l =8 ? v dd =3.3v r l =8 ? v dd =2.5v r l =8 ? quiescent current (ma) supply voltage (v) quiescent current vs. supply voltage v in =0v no load
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 6/10 www.mosanalog.com application information basic application example fig.1 a audio amplifier application circuit. external gain-setting as s hown in fig.1, the amplifier a1 is independent amplifiers with an externally configured gain of a v = - r f /r i. the amplifier a2 is a closed-loop gain of a v = -1 fixed by two internal resistors. the outputs of a1 and a2 are used to drive the mono bridged-tied load (btl). high pass filter the i nput capacitor c in and resister r in are decided the cut-off frequency of the hpf. the equation is as follows: f cut-off = 1 / (2 *r in *c in )
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 7/10 www.mosanalog.com external dimensions sop8 h e d a a1 e b c l dimension in mm dimension in inch symbol min max min max a 1.35 1.75 0.0532 0.0688 a1 0.10 0.25 0.0040 0.0098 b 0.33 0.51 0.013 0.020 c 0.19 0.25 0.0075 0.0098 d 4.80 5.00 0.1890 0.1968 h 5.80 6.20 0.2284 0.2440 e 3.80 4.00 0.1497 0.1574 e 1.27 bsc 0.050 bsc l 0.40 1.27 0.016 0.050 msop8 a a1 b c l d h e a2 e dimension in mm dimension in inch symbol min max min max a 0.81 1.12 0.032 0.048 a1 0.05 0.15 0.002 0.006 a2 0.76 0.86 0.030 0.038 b 0.28 0.38 0.011 0.015 c 0.13 0.23 0.005 0.009 d 2.90 3.10 0.114 0.122 h 4.70 5.10 0.185 0.201 e 2.90 3.10 0.114 0.122 e 0.65 0.026 l 0.40 0.66 0.016 0.026
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 8/10 www.mosanalog.com tape and reel (unit : mm) 3.0 3.6 12.0 6.9 8.0 5.5 1.75 5.4 2.0 4.0 1.5+0.1/-0.0 dia 0.5 radius typical 1.5 min 0.30 0.3r max 1.7 2.0 0.05 0.05 0.05 0.3 sop8 3.4 4.2 12.0 5.2 8.0 5.5 1.75 3.3 2.0 4.0 1.5+0.1/-0.0 0.3 typical 1.5 min 0.30 0.3r max 1.2 1.6 0.05 0.05 0.05 0.3 msop8
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 9/10 www.mosanalog.com demo board 2 1 4 3 function description label 1: supply voltage supply voltage range is 2.5v to 6.5v, the left of ju mp is positive and the right of jump is negative. label 2: signal input connected to audio signals. label 3: speaker output connected to speaker with 8ohm or 4 ohm label 4: shutdown control the system is active mode when the jump is placed le ft, the shutdown pin of ms6 891 is connected to gnd . the system enters shutdown mode when the jump is placed right, the shutdown pin of MS6891 is connected to v dd .
mosa MS6891 mono 1.1w power amplifier with shutdown rev 1 10/10 www.mosanalog.com circuit r6 20k r5 20k + c2 1u + c7 0.39u + c4 1u sd jp1 1 2 avdd c1 0.1u 1 2 jp3 -in r3 100 k sd 1 bp 2 +in 3 -in 4 vo1 5 vdd 6 gnd 7 vo2 8 u1 MS6891 j1 3 2 l2 +in_j 1 spea ke r ls1
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