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sgm4890 1.1w audio power amplifier general description the sgm4890 is a 1.1w, fully integrated, audio power amplifier. it is designed to maximize audio performance in portable applications su ch as mobile phone. the portable application requires audio power amplifier has minimum of external components and can operate from a single 2.5v to 5.5v power supply. sgm4890 is capable of delivering 1.1w of continuous output power with typically 1% distortion (thd+n) when it drives an 8 ? speaker from a 5.0v power supply. the sgm4890 features a low power consumption shutdown mode, which is achieved by driving the shutdown pin with a logic low. additionally, the sgm4890 features an internal thermal shutdown protection mechanism. the sgm4890 does not require output coupling capacitors or bootstrap capacitors, and therefore is ideally suited for mobile phone and other low voltage applications where minimal power consumption is a primary requirement. for maximum flexibility, the sgm4890 provides an externally controlled gain (with resistors), as well as an externally controlled turn-on time (with the bypass capacitor). when using a 1 f bypass capacitor, it offers 110ms wake-up time when v + is equal to 5.0v. the sgm4890 is available in green msop-8 package. it operates over an ambient temperature range of -40 to +85 . features ? ideal for notebook computers, pdas, and other small portable audio devices ? 1.1w into 8 ? btl load from 5v supply at thd+n = 1% (typ) ? excellent psrr: direct connection to battery ? fast turn-on time ? unity gain stable ? 2.5v to 5.5v operation ? shutdown current: 0.01 a (typ) ? shutdown pin is compatible with 1.8v logic ? -40 to +85 operating temperature range ? small packaging applications portable systems mp3 players mobile phone pdas gps rev. b sg micro corp www.sg-micro.com
sgm4890 1.1w audio power amplifier 2 sg micro corp www.sg-micro.com package/ordering information model order number package description package option marking information sgm4890 sgm4890yms/tr msop-8 tape and reel, 3000 sgm4890yms absolute maximum ratings supply voltage????????????????????6v input voltage?????????????..-0.3v to (v + ) + 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??????????????????...????2000v mm????????????????????????200v 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) 1 2 3 4 5 6 7 8 msop-8 shdn bypass -in +in v o1 v o2 v + gnd
sgm4890 1.1w audio power amplifier 3 sg micro corp www.sg-micro.com electrical characteristics (t a = +25 , unless otherwise specified.) parameter symbol conditions min typ max units v + = +5.0v, no load 4 8 v + = +5.0v, 8 ? load 6 10 v + = +3.6v, no load 3.7 v + = +3.6v, 8 ? load 5.7 v + = +3.0v, no load 3.5 7 v + = +3.0v, 8 ? load 5.5 9 v + = +2.6v, no load 3.3 quiescent power supply current i q v in = 0v, i o = 0a v + = +2.6v, 8 ? load 5.3 ma shutdown current i sd v shutdown = 0v 0.01 4.0 a shutdown voltage input high v sdih 1.2 v shutdown voltage input low v sdil 0.4 v output offset voltage v os 1 50 mv v + = +5.0v 1.10 v + = +3.6v 0.58 v + = +3.0v 0.40 output power (8 ? ) p o f = 1khz, thd+n = 1% v + = +2.6v 0.30 w total harmonic distortion + noise thd+n p o = 0.4wrms, f = 1khz 0.01 % v + = +5.0v -66 v + = +3.6v -63 v + = +3.0v -63 f = 217hz v + = +2.6v -62 v + = +5.0v -72 v + = +3.6v -68 v + = +3.0v -66 power supply rejection ratio psrr f = 1khz v + = +2.6v -64 db v + = +5.0v 110 v + = +3.6v 110 v + = +3.0v 100 wake-up time t wu c bypass = 1 f v + = +2.6v 100 ms v + = +5.0v 10 v + = +3.6v 16 v + = +3.0v 17.8 shutdown time t sdt 8 ? load v + = +2.6v 17.8 s
sgm4890 1.1w audio power amplifier 4 sg micro corp www.sg-micro.com typical performance characteristics v out+ or v out- large sine signal response time (10 s/div) output voltage (500mv/div) v + = 2.6v v out+ or v out- large sine signal response time (5 s/div) output voltage (500mv/div) v + = 3v v out+ or v out- large sine signal response time (5 s/div) output voltage (500mv/div) v + = 3.6v large signal step response time (2 s/div) output voltage (500mv/div) v + = 2.6v large signal step response time (2 s/div) output voltage (500mv/div) v + = 3v large signal step response time (2 s/div) output voltage (500mv/div) v + = 3.6v
sgm4890 1.1w audio power amplifier 5 sg micro corp www.sg-micro.com typical performance characteristics v out+ or v out- large sine signal response time (5 s/div) output voltage (500mv/div) v + = 5v small signal frequency response -9 -6 -3 0 3 0.01 0.1 1 10 frequency (mhz) normalized gain (db) v + = +5v, 3v, 2.6v v in = -10dbm output offset voltage vs. temperature 0 0.4 0.8 1.2 1.6 2 -40 -15 10 35 60 85 temperature ( ) output offset voltage (mv) v + = 5v large signal step response time (5 s/div) output voltage (500mv/div) v + = 5v quiescent current vs. temperature 0 1 2 3 4 5 6 7 -40 -15 10 35 60 85 temperature ( ) quiescent current (ma) v + = 3v v + = 3.6v v + = 5v v + = 2.6v supply current vs. shutdown voltage -1 0 1 2 3 4 5 0123 shutdown voltage (v) supply current (ma) off on v + = 5v
sgm4890 1.1w audio power amplifier 6 sg micro corp www.sg-micro.com typical performance characteristics supply current vs. shutdown voltage -1 0 1 2 3 4 5 0123 shutdown voltage (v) supply current (ma) off on v + = 3.6v clipping (dropout) voltage vs. supply voltage 0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 0123456 supply voltage (v) dropout voltage (v) r l = 4 ? top r l = 8 ? bottom r l = 8 ? top r l = 4 ? bottom power dissipation vs. output power 0 0.05 0.1 0.15 0.2 0.25 0.3 0 0.1 0.2 0.3 0.4 0.5 output power (w) power dissipation (w) v + = 3v r l = 8 ? f = 1khz thd 1.0% supply current vs. shutdown voltage -1 0 1 2 3 4 5 0123 shutdown voltage (v) supply current (ma) v + = 3v v + = 2.6v v + = 5v v + = 3.6v output power vs. supply voltage 0 0.3 0.6 0.9 1.2 1.5 1.8 2.533.544.555.5 supply voltage (v) output power (w) r l = 8 ? c in = 0.39 f f = 1khz g = 2v/v thd+n = 10% thd+n = 1% power dissipation vs. output power 0 0.2 0.4 0.6 0.8 1 0 0.2 0.4 0.6 0.8 1 output power (w) power dissipation (w) v + = 5v r l = 8 ? f = 1khz thd 1.0%
sgm4890 1.1w audio power amplifier 7 sg micro corp www.sg-micro.com typical performance characteristics thd+n vs. frequency 0.001 0.01 0.1 1 0.01 0.1 1 10 100 frequency (khz) thd+n (%) v + = +2.6v p o = 0.1w r l = 8 ? c in = 0.39 f f = 1khz g = 2v/v thd+n vs. frequency 0.001 0.01 0.1 1 0.01 0.1 1 10 100 frequency (khz) thd+n (%) v + = +5v p o = 0.25w r l = 8 ? c in = 0.39 f f = 1khz g = 2v/v thd+n vs. output power 0.001 0.01 0.1 1 10 0.01 0.1 1 output power (w) thd+n (%) v + = +3v r l = 8 ? f = 1khz c in = 0.39 f g = 2v/v thd+n vs. frequency 0.001 0.01 0.1 1 0.01 0.1 1 10 100 frequency (khz) thd+n (%) v + = +3v p o = 0.25w r l = 8 ? c in = 0.39 f f = 1khz g = 2v/v thd+n vs. output power 0.001 0.01 0.1 1 10 0.01 0.1 1 output power (w) thd+n (%) v + = +2.6v r l = 8 ? f = 1khz c in = 0.39 f g = 2v/v thd+n vs. output power 0.001 0.01 0.1 1 10 0.01 0.1 1 10 output power (w) thd+n (%) v + = +5v r l = 8 ? f = 1khz c in = 0.39 f g = 2v/v
sgm4890 1.1w audio power amplifier 8 sg micro corp www.sg-micro.com typical performance characteristics wake-up time vs. bypass capacitor 0 100 200 300 400 500 600 700 012345 bypass capacitor ( f) wake-up time (ms) v + = 3.6v
sgm4890 1.1w audio power amplifier 9 sg micro corp www.sg-micro.com typical application 20k 15pf 20k bias 250k 250k c bypass 1f r in 20k r f 20k a1 a2 sw shutdown control v ih v il v o1 v o2 r l 8 gnd audio input c in 0.39f 10k 10k c s 1f v + 500k 10k note: 1. a 10k ? resistor must be serially connected to shdn pin.
sgm4890 1.1w audio power amplifier 10 sg micro corp www.sg-micro.com package outline dimensions msop-8 e1 e e d a1 l c a a2 b recommended land pattern (unit: mm) 1.02 0.41 0.65 4.8 dimensions in millimeters dimensions in inches symbol min max min max a 0.820 1.100 0.032 0.043 a1 0.020 0.150 0.001 0.006 a2 0.750 0.950 0.030 0.037 b 0.250 0.380 0.010 0.015 c 0.090 0.230 0.004 0.009 d 2.900 3.100 0.114 0.122 e 2.900 3.100 0.114 0.122 e1 4.750 5.050 0.187 0.199 e 0.650 bsc 0.026 bsc l 0.400 0.800 0.016 0.031 0 6 0 6
sgm4890 1.1w 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 msop-8 13 12.4 5.2 3.3 1.5 4.0 8.0 2.0 12.0 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
sgm4890 1.1w 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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