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SGM4866 1.28w stereo audio power amplifier ? general description the SGM4866 is a stereo audio power amplifier that is designed for demanding applications in mobile phones and other portable communication device applications. it is capable of delivering 1.28w of continuous average power per channel into an 8 ? bridge tied load (btl) with typically 1% distortion (thd+n) from a 5v power supply. the SGM4866 features an externally controlled, low power consumption shutdown mode and thermal shutdown protection. it also utilizes circuitry to reduce ?pop/click? during device turn-on. the SGM4866 is unity-gain stable and can be configured by external gain-setting resistors. the SGM4866 is available in green tqfn-33-16l package. it operates over an ambient temperature range of -40 to +85 . features ? 1.28w into 8 ? btl load from 5v supply at thd+n = 1% (typical, per channel) ? excellent psrr: direct connection to battery ? unity gain stable ? 2.6v to 5.5v operation ? shutdown current: 0.01 a (typ) ? improved pop/click circuitry ? no output coupling capacitors ? external gain configuration capability ? thermal shutdown protection circuitry ? -40 to +85 operating temperature range ? available in green tqfn-33-16l package applications cell phones, pda, mp4, pmp portable and desktop computers desktops audio system multimedia monitors ? rev. a. 1 sg micro corp www.sg-micro.com
SGM4866 1.28w stereo audio power amplifier 2 sg micro corp www.sg-micro.com package/ordering information model order number package description package option marking information SGM4866 SGM4866ytq16g/tr tqfn-33-16l tape and reel, 3000 4866tq absolute maximum ratings supply voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6v input voltage . . . . . . . . . . . . . . . . . . . . . . . -0.3v to (v cc ) + 0.3v storage temperature range . . . . . . . . . . . . . .-65 to +150 junction temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . 150 operating temperature range . . . . . . . . . . . . . .-40 to +85 lead temperature range (soldering 10sec) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 260 esd susceptibility hbm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3000v mm . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 400v note: stresses beyond those listed under ?absolute maximum ratings? may cause permanent damage to the device. these are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the s pecifications is not implied. exposure to absolute maximum rating conditions for extended periods may affect device reliability. ? caution this integrated circuit can be damaged by esd if you don?t pay attention to esd protection. sgmicro recommends that all integrated circuits be handled with appropriate precautions. failure to observe proper handling and installation procedures can cause damage. esd damage can range from subtle performance degradation to complete device failure. precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. sgmicro reserves the right to make any change in circuit design, specification or other related things if necessary without notice at any time. please contact sgmicro sales office to get the latest datasheet. ? pin configuration (top view) ina 1 2 3 4 5 7 8 9 10 shdn v cc -outb -outa gnd +outa gnd gnd 6 11 12 13 14 16 gnd gnd bp v cc +outb gnd gnd 15 inb tqfn-33-16l ?
SGM4866 1.28w stereo audio power amplifier 3 sg micro corp www.sg-micro.com electrical characteristics (t a = +25 , unless otherwise specified.) SGM4866 parameter symbol conditions min typ max units supply voltage v cc 2.6 5.5 v shutdown current i sd v in = 0v, v shdn = gnd, v cc = v + 0.01 3 a v in = 0v, v shdn = v cc = 5.0v -25 5.0 25 output offset voltage v os v in = 0v, v shdn = v cc = 3.0v -25 4.3 25 mv v cc = +5v, no load 11.6 17 v cc = +5v, 8 ? load 11.9 18 v cc = +3v, no load 10.2 15 quiescent power supply current i q v in = 0v v cc = +3v, 8 ? load 10.4 ma shutdown voltage input high v sdih 1.2 shutdown voltage input low v sdil 0.4 v v cc = +5v 1.28 v cc = +3.6v 0.65 f = 1khz, thd+n = 1% v cc = +3v 0.44 v cc = +5v 1.60 v cc = +3.6v 0.80 output power per channel (8 ? ) p o f = 1khz, thd+n = 10% v cc = +3v 0.55 w v cc = +5v 2.05 v cc = +3.6v 1.00 f = 1khz, thd+n = 1% v cc = +3v 0.70 v cc = +5v 2.58 v cc = +3.6v 1.30 output power per channel (4 ? ) p o f = 1khz, thd+n = 10% v cc = +3v 0.88 w v cc = +5v, p o = 0.9w 0.07 total harmonic distortion + noise thd+n f = 1khz, a v = 2, r l = 8 ? v cc = +3v, p o = 0.35w 0.06 % v cc = +5v -64 input 10 ? terminated, f = 217hz, c bypass = 1 f v cc = +3v -66 v cc = +5v -65 power supply rejection ratio psrr input 10 ? terminated, f = 1khz, c bypass = 1 f v cc = +3v -68 db crosstalk x talk f = 1khz, c bypass = 1 f, p o = 1w -85 db v cc = +5v 150 turn-on time t on c bypass = 1 f v cc = +3v 104 ms
SGM4866 1.28w stereo audio power amplifier 4 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , a v = 2, f = 1khz, c bypass = 1f, unless otherwise noted. thd+n vs. output power per channel 0.01 0.1 1 10 0.01 0.1 1 10 output power (w) thd+n (%) v cc = 5v r l = 8 ? bw < 80khz thd+n vs. output power per channel 0.01 0.1 1 10 0.01 0.1 1 10 output power (w) thd+n (%) v cc = 3v r l = 8 ? bw < 80khz thd+n vs. output power per channel 0.01 0.1 1 10 0.01 0.1 1 10 output power (w) thd+n (%) v cc = 4v r l = 4 ? bw < 80khz thd+n vs. output power per channel 0.01 0.1 1 10 0.01 0.1 1 10 output power (w) thd+n (%) v cc = 4v r l = 8 ? bw < 80khz thd+n vs. output power per channel 0.01 0.1 1 10 0.01 0.1 1 10 output power (w) thd+n (%) v cc = 5v r l = 4 ? bw < 80khz thd+n vs. output power per channel 0.01 0.1 1 10 0.01 0.1 1 10 output power (w) thd+n (%) v cc = 3v r l = 4 ? bw < 80khz
SGM4866 1.28w stereo audio power amplifier 5 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , a v = 2, f = 1khz, c bypass = 1f, unless otherwise noted. thd+n vs. frequency 0.001 0.01 0.1 1 0.01 0.1 1 10 100 frequency (khz) thd+n (%) v cc = 5v, r l = 8 ? p o = 900mw, no filters thd+n vs. frequency 0.001 0.01 0.1 1 0.01 0.1 1 10 100 frequency (khz) thd+n (%) v cc = 3v, r l = 8 ? p o = 350mw, no filters power supply rejection ratio vs. frequency -100 -80 -60 -40 -20 0 0.01 0.1 1 10 100 frequency (khz) psrr (db) v cc = 3v, r l = 8 ? input 10 ? terminated 200mv p-p thd+n vs. frequency 0.001 0.01 0.1 1 0.01 0.1 1 10 100 frequency (khz) thd+n (%) v cc = 4v, r l = 8 ? p o = 600mw, no filters power supply rejection ratio vs. frequency -100 -80 -60 -40 -20 0 0.01 0.1 1 10 100 frequency (khz) psrr (db) v cc = 5v, r l = 8 ? input 10 ? terminated 200mv p-p crosstalk or separation vs. frequency -100 -95 -90 -85 -80 -75 0.01 0.1 1 10 100 frequency (khz) crosstalk (db) v cc = 5v, r l = 8 ? p o = 1w, no filters b - out /a - in a - out / b - in
SGM4866 1.28w stereo audio power amplifier 6 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , a v = 2, f = 1khz, c bypass = 1f, unless otherwise noted. power dissipation vs. output power 0 0.2 0.4 0.6 0.8 00.511.5 output power (w) power dissipation (w) v cc = 5v r l = 8 ? bw < 80khz thd+n 1% power dissipation vs. output power 0 0.1 0.2 0.3 0.4 0 0.1 0.2 0.3 0.4 0.5 output power (w) power dissipation (w) v cc = 3v r l = 8 ? bw < 80khz thd+n 1% power dissipation vs. output power 0 0.2 0.4 0.6 0.8 1 0 0.3 0.6 0.9 1.2 1.5 output power (w) power dissipation (w) v cc = 4v r l = 4 ? bw < 80khz thd+n 1% power dissipation vs. output power 0 0.1 0.2 0.3 0.4 0.5 0 0.2 0.4 0.6 0.8 1 output power (w) power dissipation (w) v cc = 4v r l = 8 ? bw < 80khz thd+n 1% power dissipation vs. output power 0 0.4 0.8 1.2 1.6 2 0 0.5 1 1.5 2 2.5 output power (w) power dissipation (w) v cc = 5v r l = 4 ? bw < 80khz thd+n 1% power dissipation vs. output power 0 0.1 0.2 0.3 0.4 0.5 0.6 0 0.2 0.4 0.6 0.8 output power (w) power dissipation (w) v cc = 3v r l = 4 ? bw < 80khz thd+n 1%
SGM4866 1.28w stereo audio power amplifier 7 sg micro corp www.sg-micro.com typical performance characteristics at t a = +25 , a v = 2, f = 1khz, c bypass = 1f, unless otherwise noted. output power vs. supply voltage 0 0.5 1 1.5 2 2.5 2.533.544.555.5 supply voltage (v) output power (w) r l = 8 ? thd+n = 10% thd+n = 1% output power vs. supply voltage 0 0.5 1 1.5 2 2.5 3 3.5 2.5 3 3.5 4 4.5 5 5.5 supply voltage (v) output power (w) r l = 4 ? thd+n = 10% thd+n = 1%
SGM4866 1.28w stereo audio power amplifier 8 sg micro corp www.sg-micro.com typical application circuit _ + _ + + _ + _ -outa +outa +outb -outb bp ina inb r f 20k r l 8 r l 8 gnd v cc c s 1f c i 0.22f r i 20k audio input c bypass 1.0f c i 0.22f r i 20k audio input r f 20k v cc shdn shdn working 4 8 9 5, 6, 7, 13, 14, 16 10 12 1 3 v cc 2, 11 15 10k ? ? note: 1. a 10k ? resistor must be serially connected to shdn pin.
SGM4866 1.28w stereo audio power amplifier 9 sg micro corp www.sg-micro.com application note pcb design recommendations (t hermal design considerations) thermal vias SGM4866 is capable of delivering 2.05w of continuous average power per channel into a 4 ? bridge tied load (btl) with typically 1% distortion (thd+n) from a 5v power supply, but thermal vias are necessary. they conduct heat from the exposed pad of the package to the ground plane. the number of vias is application specific and is dependent upon electrical requirements and power dissipation. the via diameter should be 0.2mm to 0.33mm with 1oz. copper via barrel plating. it is important to plug the via to avoid any solder wicking inside the via during the soldering process. the thermal vias can be tented with solder mask on the top surface of the pcb. the solder mask diameter should be at least 75microns (or 3mils) larger than the via diameter. the solder mask thickness should be the same across the entire pcb. a package thermal performance may be improved by increasing the number of vias.
SGM4866 1.28w stereo audio power amplifier 10 sg micro corp www.sg-micro.com package outline dimensions tqfn-33-16l top view bottom view side view a a2 a1 e e1 b l k d1 d e n1 n5 n16 1.7 1.7 0.7 2.2 3.6 0.5 0.24 recommended land pattern (unit: mm) dimensions in millimeters dimensions in inches symbol min max min max a 0.700 0.800 0.028 0.031 a1 0.000 0.050 0.000 0.002 a2 0.203 ref 0.008 ref d 2.900 3.100 0.114 0.122 d1 1.600 1.800 0.063 0.071 e 2.900 3.100 0.114 0.122 e1 1.600 1.800 0.063 0.071 k 0.200 min 0.008 min b 0.180 0.300 0.007 0.012 e 0.500 typ 0.020 typ l 0.300 0.500 0.012 0.020
SGM4866 1.28w stereo audio power amplifier 11 sg micro corp www.sg-micro.com tape and reel information note: the picture is only for reference. please make the object as the standard. key parameter list of tape and reel package type reel diameter reel width w1 (mm) a0 (mm) b0 (mm) k0 (mm) p0 (mm) p1 (mm) p2 (mm) w (mm) pin1 quadrant tqfn-33-16l 13 12.40 3.35 3.35 1.13 4.00 4.00 2.00 12.00 q1 reel width (w1) reel diameter reel dimensions tape dimensions direction of feed p2 p0 w p1 a0 k0 b0 q1 q2 q4 q3 q3 q4 q2 q1 q3 q4 q2 q1
SGM4866 1.28w stereo audio power amplifier 12 sg micro corp www.sg-micro.com carton box dimensions note: the picture is only for reference. please make the object as the standard. key parameter list of carton box reel type length (mm) width (mm) height (mm) pizza/carton 13 386 280 370 5

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