esmt/emp AD9256H elite semiconductor memory technology inc./elite micropower inc. publication date: jan. 2011 revision: 1.1 1/21 digital amplifier power stage features n pvdd range from 10.8v to 16.5v n support single-ended input audio pwm (ad) modulated signal n support differential input audio pwm (ad & bd) modulated signal n loudspeaker output power for stereo (btl) - 10w x 2ch @ thd+n=0.4% into 8 at 15v - 8w x 2ch @ thd+n=8.4% into 8 at 12v n loudspeaker output power for mono (btl) - 20w x 1ch @ thd+n=0.45% into 8 at 15v n over-temperature protection n over-current protection n under-voltage detection n error report n built-in anti-pop function n 24-pin e-tssop thermally-enhanced package applications n tv audio n dvd receiver n home theaters description the AD9256H is a high performance stereo digital amplifier power stage. it can deliver 10w x 2ch output power into 8 loudspeaker for stereo or 20w x 1ch output power into 4 loudspeaker for mono in btl configuration within <1% thd+n at 15v supply. a patented, built-in anti-pop function can reduce the speaker?s pop noise without requiring complex anti-pop sequence in pwm input. the AD9256H?s chip is integrated with over-temperature, over-current, and under-voltage protection circuits. these additions safeguard the AD9256H against fault conditions that could damage the chip and system catastrophically. functional block diagram
esmt/emp AD9256H elite semiconductor memory technology inc./elite micropower inc. publication date: jan. 2011 revision: 1.1 2/21 pin assignments pin description pin name typ description 1 vdd p power supply for digital circuit 2 gnd p ground for digital circuit 3 otw o over temperature warning. 4 error o error pointer 5 ina i pwm input a 6 inb i pwm input b 7 inc i pwm input c 8 ind i pwm input d 9 sdn i shutdown (active-low) with soft pulled resistor 100kohm to ground 10 sel0 i mode select pin 0 11 sel1 i mode select pin 1 12 apop_cap o anti-pop capacitor 13 pvddd p power supply for half bridge d 14 outd o half-bridge output d 15 pgndc/d p ground for half bridge c/d 16 pgndc/d p ground for half bridge c/d 17 outc o half-bridge output c 18 pvddc p power supply for half bridge c 19 pvddb p power supply for half bridge b 20 outb o half-bridge output b 21 pgnda/b p ground for half bridge a/b 22 pgnda/b p ground for half bridge a/b 23 outa o half-bridge output a 24 pvdda p power supply for half bridge a
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