esmt/emp ad52650 elite semiconductor memory technology inc./elite micropower inc. publication date: jun. 2009 revision: 1.0 1/23 2.5w/ch stereo filter-less class-d audio amplifier features z supply voltage range: 2.5 v to 5.5 v z support single-ended or differential analog input z low static operation current z low shut-down current z short power-on transient time z two volume control modes ? dc volume control from -38db to +20db ? 4-step volume gain of +6, +12, +18, +24db z independent shut-down control for left or right channel z short-circuit and thermal protection z loudspeaker power within 10% thd+n ? 1.5w/ch into 8 loudspeaker ? 2.5w/ch into 4 loudspeaker z loudspeaker efficiency ? 90% @ 8 , p o,10% thd+n ? 85% @ 4 , p o,10% thd+n applications z monitor audio z pda z portable multimedia devices z notebook computer z mobile phone description the ad52650 is a stereo, filter-less class-d audio amplifier. operating with 5.0v loudspeaker driver supply, it can deliver 2.5w/ch output power into 4 loudspeaker within 10% thd+n. the ad52650 has two volume control modes by setting mode pin. while mode pin is set logic high, ad52650 is in dc volume control mode with 31-step volume gain from -38 db to +20db, adjusted by the dc voltage applied on g0 pin. otherwise, ad52650 is the 4-step volume gain mode with +6db, +12db, +18db, and +24db gain, selected by setting g0 and g1 pins. the two volume adjustment modes are designed to fit the different volume control requirements in various applications. the ad52650 packaged as e-tssop 24l is a stereo audio amplifier with high efficiency, which leads to longer battery life, less heat sink requirement, smaller board size and lower system cost, and suitable for the notebook computer, and portable multimedia devices. with the independent shut-down control for left or right channel, the ad52650 is more convenient to control the left and right channels. ordering information product id package packing comments AD52650-QE24NAT e-tssop 24l tube green marking information ad52650 marking information line 1 logo line 2 product id no. line 3 tracking code pin1 dot esmt ad52650 tracking code
esmt/emp ad52650 elite semiconductor memory technology inc./elite micropower inc. publication date: jun. 2009 revision: 1.0 2/23 pin assignments 1 2 3 4 5 6 7 8 9 10 11 12 24 23 22 21 20 19 18 17 16 15 14 13 thermal pad inl- inl+ n.c. g1 n.c. outl+ pvddl pgndl outl- agnd mode sdl inr- inr+ n.c. g0 n.c. outr+ pvddr pgndr outr- n.c. avdd sdr pin description name typ description characteristic 1 inl- i left channel input (-) 2 inl+ i left channel input (+) 3 n.c. x n.c. 4 g1 i gain selection with 300 k pull-low resistor 5 n.c. x n.c. 6 outl+ o left channel output (+) 7 pvddl p high current power supply 8 pgndl g high current ground 9 outl- o left channel output (-) 10 agnd g ground 11 mode i 0: 4-gain control; 1:dc vol. control with 300 k pull-low resistor 12 sdl i shut-down left channel (low active) with 300 k pull-low resistor 13 sdr i shut-down right channel (low active) with 300 k pull-low resistor 14 avdd p power supply 15 n.c. x n.c. 16 outr- o right channel output (-) 17 pgndr g high current ground 18 pvddr p high current power supply 19 outr+ o right channel output (+) 20 n.c. x n.c. 21 g0 i gain selection(mode =0) /dc vol. level(mode=1) 22 n.c. x n.c. 23 inr+ i right channel input (+) 24 inr- i right channel input (-) thermal pad g must be soldered to pcb?s ground plane
esmt/emp ad52650 elite semiconductor memory technology inc./elite micropower inc. publication date: jun. 2009 revision: 1.0 3/23 functional block diagram gain adjust gain adjust pwm generator speaker driver pwm generator speaker driver overload & thermal protection -wave generator internal control logics 300k 300k avdd; pvddl; pvddr agnd; pgndl; pgndr outl+ outl- outr+ outr- sdl sdr g0 mode g1 inl+ inl- inr+ inr- c in c in c s c in c in analog input analog input available package package type device no. ja ( o c/w) exposed thermal pad e-tssop 24l ad52650 32.3 yes (note1) note1: the thermal pad is at the bottom of p ackage. to optimize the performance of thermal dissipation, solder the thermal pad to pcb?s ground plane is must be soldered. absolute maximum ratings symbol parameter min max unit avdd power supply for lower power analog cells 2.5 5.5 v pvddl(r) power supply for loudspeaker driver 2.5 5.5 v input voltage -0.3 avdd v t stg storage temperature -65 150 o c t a ambient operating temperature 0 70 o c
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