unisonic technologies co., ltd lm4862 cmos ic www.unisonic.com.tw 1 of 4 copyright ? 2014 unisonic technologies co., ltd qw-r502-314.c audio power amplifier with shutdown mode ? description the utc lm4862 is a built in bridge-connected form audio amplifier. in normal operation, it can deliver 500 mw (typ.) continuous power. the output load of the utc lm4862 should be 8 ? , the supply voltage should be 5v, and the thd is as low as 1%. as the most popular amplifiers, lm4862 is also designed to be able to provide high quality output power with less external components, such as the output ca pacitors for coupling, bootstrap capacitors, or snobbery networks. in applications, the utc lm4862 can be specially used as an ideal in low-power portable systems, for example, portable computers, desktop com puters, and low voltage audio systems, etc. ? features * stable unity gain * gain configuration can be set by external components dip-8 sop-8 ? ordering information ordering number package packing lead free halogen free lm4862l-d08-t LM4862G-D08-T dip-8 tube - lm4862g-s08-r sop-8 tape reel ? marking dip-8 sop-8
lm4862 cmos ic unisonic technologies co., ltd 2 of 4 www.unisonic.com.tw qw-r502-314.c ? pin configuration 1 2 3 4 5 6 7 8 shutdown bypass in+ in- v o2 gnd v o1 v dd ? pin description pin no pin name description 1 shutdown shutdown mode control input, high active 2 bypass connect to internal voltage divider for middle supply bias 3 in+ non-inverting power input pin 4 in- inverting power input pin 5 v o 1 output power pin 1 6 v dd power supply 7 gnd ground 8 v o 2 output power pin 2 ? block diagram nc shutdown bias gnd v dd /2 bypass 100k ? 40k ? 40k ? 100k ? v dd r pu c b 1.0f c i 0.39f c s 1.0f + +in -in r i 20k ? r f 20k ? audio input a v =-1 + - r l 8 ? v dd + - 4 3 2 1 7 8 5 6 v o2 v o1
lm4862 cmos ic unisonic technologies co., ltd 3 of 4 www.unisonic.com.tw qw-r502-314.c ? absolute maximum rating (t a =25 unless otherwise specified.) parameter symbol ratings unit supply voltage v dd 6.0 v input voltage v in -0.3 ~ +(0.3+v dd ) v power dissipation dip-8 p d 500 mw sop-8 300 mw infrared (15 sec.) 220 junction temperature t j +150 storage temperature t stg -65 ~ +150 note: absolute maximum ratings are those values beyond which the device could be permanently damaged. absolute maximum ratings are stress ratings only and functional device operation is not implied. ? electrical characteristics (v cc =5v, f=1khz, t a =25 unless otherwise specified.) parameter symbol test conditions min typ max unit supply voltage v dd 2.0 5.5 v output offset voltage v os v in =0v 5.0 50 mv quiescent power supply current i dd v in =0v, i o =0a 6.5 12.0 ma shutdown current i sd v pin1 =v dd 0.6 a output power p o thd=1%, f=1khz, r l =8 ? 500 mw thd=10%, f=1khz, r l =8 ? 800 mw total harmonic distortion thd f=1khz, r l =8 ? , po = 500mw 0.5 % power supply rejection ratio psrr v cc =4.9v ~ 5.1v 60 db
lm4862 cmos ic unisonic technologies co., ltd 4 of 4 www.unisonic.com.tw qw-r502-314.c utc assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or other parameters) listed in products specifications of any and all utc products described or contained herein. utc products are not designed for use in life support appliances, devices or systems where malfunction of these products can be reasonably expected to result in personal injury. reproduction in whole or in part is prohibited without the prior written consent of the copyright owner. the information presented in this document does not form part of any quotation or contract, is believed to be accurate and reliable and may be changed without notice.
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