data brief for further information contact your local stmicroelectronics sales office. june 2010 doc id 17667 rev 1 1/4 4 STEVAL-CCA025V1 class g capless headphone amplifier demonstration board based on the ts4621 features power supply range: 2.3 v to 4.8 v 0.6 ma/channel quiescent current 2.1 ma current consumption with 100 w/channel (10 db crest factor) 0.006% typical thd+n at 1 khz 100 db typical psrr at 217 hz zero pop and click i 2 c interface for volume control digital volume control range: -60 db to +4 db 100 db of snr a-weighted at g = 0 db independent right and left channel enable control integrated high-efficiency buck converter low standby current: 5 a max no output coupling capacitors (thanks to the internal negative supply) thermal shutdown and short-circuit protection rohs compliant description the STEVAL-CCA025V1 demonstration board is designed to aid in the evaluation of the ts4621 audio differential input stereo headphone amplifier. the ts4621 device is soldered on a four-layer pcb. an on-board rs-232 to i 2 c interface renders the board easy to control from a personal computer through a serial port. the software provided with the board controls all features of the ts4621, such as gain, mode, mute, standby and register status. you can also use the connectors on the demonstration board to directly control the features through another i 2 c interface. STEVAL-CCA025V1 www.st.com
schematic diagrams STEVAL-CCA025V1 2/4 doc id 17667 rev 1 1 schematic diagrams figure 1. circuit schematics 5 " + 0 5 # + 0 5 ! + 0 * $ " ' . $ ' . $ 6 c c ' n d ' n d ' n d ' . $ ' . $ 2 4 3 $ 3 2 4 8 $ $ 4 2 2 + 2 + 2 + 2 + 2 k $ . $ . 2 ' n d 2 2 # n & # n & ' n d ' n d # n # ? & # ? & # ? & # ? & ' n d ' n d 6 c c ) # ' n d # n * ' n d 6 c c ) # # n , e f t i n p u t # n 2 i g h t i n p u t # n 3 # , # n 3 $ ! # n 0 o w e r # n , e f t o u t p u t 2 i g h t o u t p u t 3 $ ! 3 # , 3 # , 3 $ ! 2 2 3 t o ) # c o n v e r t e r 4 3 m a i n a p p l i c a t i o n # ? & # ? & # ? & # ? & , ? ( ' n d ' n d ' n d ' n d 0 6 s s ( 0 6 d d
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6 o u t , 6 o u t 2 # - 3 ! " " ! " # $ # # ! ! $ $ $ , e v e l d e t e c t o r , e v e l d e t e c t o r 3 w ( p 6 d d 0 6 s s 5 4 3 ? & # 6 c c ' n d ' n d 1 ' n d 1 ' n d 1 # n 6 c c ) # # " # ! - 6
STEVAL-CCA025V1 revision history doc id 17667 rev 1 3/4 2 revision history table 1. document revision history date revision changes 23-jun-2010 1 initial release.
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