SA7412 hangzhou?silan?microelectronics?co.,ltd ?rev:1.1???????2005.11.18 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?1?of?7 block?diagram 2-ch?audio?power?amplifier(1w?x2) description SA7412?is ?a?dual?channel?audio?power?amplifier?capable?of?delivering 1w?per?channel?of?maximum?output?power?to?a?8 w ?load?using?a?single 9v?supply?at?10%?thd. features *?fixed?gain *?single?supply?operation *?integrated?standby?and?mute?function *?integrated??volume?and?input?switch?function *?integrated?monitor?function *?internal?thermal?protection applications *?audio?power?amplifier?with?high?performance *?tv *?monitor fdip-16-300-2.54 ordering?information device package SA7412 fdip-16-300-2.54
SA7412 hangzhou?silan?microelectronics?co.,ltd ?rev:1.1???????2005.11.18 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?2?of?7 absolute?maximum?ratings (t amb =25 c,?unless?otherwise?specified) characteristic symbol value unit storage?temperature t stg -55?~?+150 c operating?ambient?temperature t opr -25?~?+70 c operating?ambient?pressure p opr 1.01310 5 ??0.6110 5 pa operating?constant?acceleration g opr 9810 m/s 2 operating?shock s opr 4900 m/s 2 supply?voltage v cc ?????????????????????15.0??????????????????(*) v supply?current i cc 1.5 a power?dissipation p d ????????????????????????2????????????????????(**) w operating?supply?voltage?range v cc 7.5?~?13.5 v note:?(*)?no?signal?input; ????(**)?t amb =75 c?and?without?heatsink. electrical?characteristics (unless?otherwise?specified:?v cc =?9v;?r l ?=8 w ,?t amb ?=25 c,?f?=?1khz) characteristics symbol test?condition min. typ. max. unit quiescent?current i cq ? stby/mute=5v;?no?input;?v ol =0v --? 32 80 ma standby?current i stby ? stby/mute=0v;no?input;??v ol =0v --? 5? 50 a stand-by?on?voltage v stby-on v ol =0v;?no?input;?i_supply 0 ?50a 0 --? 0.3 v stand-by?off?voltage v stby-off v ol =0v;?no?input;?i_supply 1 ?14ma 1.2 --? --? v output?end?noise?voltage v no stby/mute?=5.0v;?no?input; v ol ?=0v;?rg=10k w --? 0.15 0.5 mvr ms ripple?rejection?ratio r r stby/mute?=5.0v;??v ol ?=0v;?rg=10k w ; v ripple =1vrms;?f ripple =120hz 30 50 --? db voltage?gain gv stby/mute?=5.0v; po=0.25w;??v ol =3.3v 31.5 33.5 35.5 db total?harmonic?distortion thd stby/mute?=5.0v; po=0.25w;?v ol =3.3v --? 0.25 0.4 % maximum?output?power po stby/mute?=5.0v; thd=10%;??v ol ?=3.3v 0.8 1.0 --? w mid?volume?gain gvmid? stby/mute?=5.0v;??v ol ?=1.5v 24.5 27.5 30.5 db min?volume?attenuation?ratio attmin stby/mute=5.0v;??v ol ?=0v~3.3v 65 75 --? db muting?ratio mr?v ol =3.3v;stby/mute=1.8v~?5.0v 65 75 --? db mute?on?voltage mute-on v ol =3.3v;?mr 1 ?65db 0 --? 1.8 v mute?off?voltage mute-off v ol ?=3.3v;?gv 1 ?31.5db 3.8 --? 5.0 v under?voltage?lock?up uvlo? stby/mute=5.0v;?icq<1ma;?no?output --? 6.5 7.5 v crosstalk? between? channel? a and?b ct stby/mute?=5.0v;??v ol ?=3.3v 45 60 --? db channel?balance c b stby/mute?=5.0v;??v ol ?=3.3v -1 0 1? db monitor?output?gain g mo ? stby/mute?=5.0v;??v ol =3.3v -2 -0.5 2? db voltage? threshold?to? s elect?input a v swa stby/mute? =5.0v;? v ol ? =3.3v; po=0.25w 0 --? 0.6 v voltage? threshold?to? select ?input b v swb stby/mute? =5.0v;? v ol ? =3.3v; po=0.25w 2.5 --? 5.0 v
SA7412 hangzhou?silan?microelectronics?co.,ltd ?rev:1.1???????2005.11.18 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?3?of?7 pin?configuration pin?description pin?no. pin?name pin?description 1 ch1?ina input?a?of?channel?1. 2 stby/mute standby?and?mute. 3 ch1?inb input?b?of?channel?1. 4 input?gnd signal?gnd. 5 rf ripple?rejection. 6 ch2?ina input?a?of?channel?2. 7 v ol volume. 8 ch2?inb input?b?of?channel?2. 9 monitor2 monitor?of?channel?2. 10 power?gnd?2 power?gnd?2. 11 ch2?out output?of?channel?2. 12 insw switch?between?ina?and?inb. 13 v cc supply?voltage. 14 ch1?out output?of?channel?1. 15 power?gnd?1 power?gnd?1. 16 monitor1 monitor?of?channel?1.
SA7412 hangzhou?silan?microelectronics?co.,ltd ?rev:1.1???????2005.11.18 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?4?of?7 function?description 1. standby?and?mute?function the?stby/mute?controls?the?amplifier?status?by?three?different?thresholds: ? ? when?stby?is?between?0v?and?0.3v,?the?bias?of?amplifier?is?off?and?the?amplifier?is?in?standby?mode. ? ? when?stby?is?between?1.2v?and?1.8v,?the?bias?of?amplifier?is?on?but?the?gain?of?the?circuit?is?zero.?the amplifier?is?in?mute?mode. ? ? when?stby?is?between?3.8v?and?5.0v,?the?amplifier?is?play?mode. 2. volume?function the?gain?of?amplifier?can?be?adjusted?by?changing?the?voltage?of?v ol . 3. insw?function the?insw?controls?the?different?input?of?amplifier: ? ? when?insw?is?between?0v?and?0.6v,?the?circuit?selects?input?a. ? ? when?insw?is?between?2.5v?and?5.0v,?the?circuit?selects?input?b. 4. monitor?function SA7412?integrates?monitor?circuits?so?that?we?can?monitor?output?wave?by?monitor2?and?monitor1?at any?time. 5. thermal?protection the?thermal?protection?circuit?operates?at?a?tj?of?approximately?145 c.?the?thermal?protection?circuit?is?reset automatically?when?the?temperature?drops. 6. absence?of?short?protection make? sure? that?the? ic? is?free? of? output?pin? short?to? ground,? output? pin? short?to? v cc ,? ic?mount?in?reverse direction?and?load?short?because?there?is?no?such?protection?in?the?ic.?the?ic?will?be?damaged?under?such conditions?and?smoke?may?be?observed.
SA7412 hangzhou?silan?microelectronics?co.,ltd ?rev:1.1???????2005.11.18 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?5?of?7 test?circuit typical?application?circuit
SA7412 hangzhou?silan?microelectronics?co.,ltd ?rev:1.1???????2005.11.18 http:?www.silan.com.cn????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????page?6?of?7 package?outline fdip-16-300-2.54 unit:?mm 7 . 6 2 0 . 3 0 8 . 8 5 0 . 4 5 6 . 3 5 0 . 3 0 3 . 8 0 0 . 1 5 5 . 1 0 m a x 3 . 5 5 0 . 4 0 1 . 4 0 m a x 0 . 4 0 0 . 1 0
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