GK2171 re v.1.0 www.chinacs2.com copyright c 2011, chengdu chengdian silicon sea technology co.,ltd. - 1 - GK2171 3w audio power amplifier with shutdown mode z general description --- the GK2171 is a mono bri dged audio power amplifier capable of delivering 3w of continuous average power into a 3 ? load with less than 10% thd when powered by a 5vpower supply . --- the GK2171 does not require output coup ling capacitors, bootstrap capacitors, or snubber networks, it is ideally suited fo r low-power portable systems that require minimum volume and weight. --- the GK2171 features include thermal shut down protection, unity-gain stability, and extrnal gain set. z key specifications p o 5.0v & 10 thd n sop into 8 1.5w typ sop/pp into 4 2.6w typ sop/pp into3 3.0w typ shutdown current 0.1 ua typ thd at 1khz at 1w continuous average output power into 8 load. ? ? ? ? 0.25% (max) z features no output coupling capacitors, bootstrap capacitors, orsnubber circuits required unity-gain stable sop packaging external gain configuration capability pin compatible with the hwd2171m z applications portable computers desktop computers low voltage audio systems z operating ratings temperature range 40 85 supply voltage 2.0v v dd 5.5v
GK2171 re v.1.0 www.chinacs2.com copyright c 2011, chengdu chengdian silicon sea technology co.,ltd. - 2 - z typical application z connection diagram
GK2171 re v.1.0 www.chinacs2.com copyright c 2011, chengdu chengdian silicon sea technology co.,ltd. - 3 - z absolute maximum ratings supply voltage 6.0v storage temperature 65 150 input voltage 0.3v v dd 0.3v power dissipation internally limited esd susceptibility human body model 2000v esd susceptibility machine model 200v junction temperature 150 z electrical characteristics v dd 5v unless otherwise specified. limits apply for t a =25c symbol parameter conditions min typ max unit i dd quiescent power supplycurrent v in 0v, i o 0a 6.0 10 ma i sd shutdown current v shutdown v dd 0.1 2.0 ua v os output offset voltage v in 0v, no load -50 5.0 50 mv p o output power thd=1%, f=1khz GK2171m, rl=8 ? GK2171mp, rl=4 ? GK2171mp, rl=3 ? 1.3 2.1 2.4 w thd=10%, f=1khz GK2171, rl=8 ? GK2171mp, rl=4 ? GK2171mp, rl=3 ? 1.5 2.6 3.0 w thd+n total harmonic distortion+noise 20hz f 20khz, a vd =2 GK2171, rl=8 ? , po=1w 0.25 % psrr power supply rejectionratio vdd = 4.9v 5.1v 60 db z external components description components functional description 1 r in inverting input resistance that sets the closed-loop gain in conjunction with r f . this resistor also forms a high pass filter with c i at f c = 1/(2 ? rici). 2 c in input coupling capacitor that blocks the dc voltage at the amplifiers input terminals. also creates a highpass filter with r i at fc = 1/(2 ? rici). 3 r f feedback resistance that sets the closed-loop gain in conjunction with r i .
GK2171 re v.1.0 www.chinacs2.com copyright c 2011, chengdu chengdian silicon sea technology co.,ltd. - 4 - 4 c s supply bypass capacitor that provides power supply filtering. 5 c bypass bypass pin capacitor that provides half-supply filtering. z ordering information part number marking package type moq GK2171m gk****x yxx sop 3,000 units/tape and reel GK2171mp gk****x yxx sop 3,000 units/tape and reel notes gk****x gk-serial number ****-product id x-package type yxx y-year xx-in-line coding z package dimensions :
GK2171 re v.1.0 www.chinacs2.com copyright c 2011, chengdu chengdian silicon sea technology co.,ltd. - 5 - symbol dimensions in millimeters dimensions in inches min. max. min. max. a 1.350 1.750 0.053 0.069 a1 0.100 0.250 0.004 0.010 a2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 d 4.700 5.100 0.185 0.200 e 1.270(bsc) 0.050(bsc) e 3.800 4.000 0.150 0.157 e1 5.800 6.200 0.228 0.244 l 0.400 1.270 0.016 0.050 ----------------------------------------------------------------------------------------------------------------------
GK2171 re v.1.0 www.chinacs2.com copyright c 2011, chengdu chengdian silicon sea technology co.,ltd. - 6 - symbol dimensions in millimeters dimensions in inches min. max. min. max. a 1.350 1.750 0.053 0.069 a1 0.050 0.150 0.004 0.010 a2 1.350 1.550 0.053 0.061 b 0.330 0.510 0.013 0.020 c 0.170 0.250 0.006 0.010 d 4.700 5.100 0.185 0.200 d1 3.202 3.402 0.126 0.134 e 3.800 4.000 0.150 0.157 e1 5.800 6.200 0.228 0.244 e2 2.313 2.513 0.091 0.099 e 1.270(bsc) 0.050(bsc) l 0.400 1.270 0.016 0.050 ----------------------------------------------------------------------------------------------------------------------
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