data brief for further information contact your local stmicroelectronics sales office. january 2008 rev 1 1/4 4 STEVAL-CCA003V1 low-voltage stereo audio power amplifier based on the ts4984 features operates from v cc =2.2 v to 5.5 v 1 w output power per channel @ v cc =5 v, thd+n=1%, rl= 8 ? 10 na standby current 62 db psrr @ 217 hz with grounded inputs high snr: 100 db (a-weighted filter) typ. near-zero pop and click available in the qfn16 4x4 mm, 0.5 mm pitch, lead-free package description this evaluation board is designed for the ts4984 stereo audio power amplifier. the micro-package qfn16 (quad, flat, non-leaded, 16-pin) combines space-saving with good thermal dissipation. the btl gain is set at 2 v for both channels and can be adapted if necessary with a modification of r1/ r8 or r2/r6 values for the left/right channels. the r3/r6 and c3/c5 component locations are empty on the board to allow changes to both input configurations from single-ended to differential. for use in differential mode, r4/r7 must be modified. the c1/c6 component locations are also left empty so that, if required, a low-pass filter can be added. STEVAL-CCA003V1 www.st.com
circuit schematic STEVAL-CCA003V1 2/4 1 circuit schematic figure 1. schematic 1 2 12 14 5 16 15 bias 3 av = -1 bypass l standby vcc1 + - + - av = -1 gnd1 + - + - 10 9 8 7 11 bypass r gnd2 vcc2 6 13 vo-l vo+l vo-r vo+r in-l in+l in+r in-r u1 * vcc cn1 + c7 1u c9 100nf vcc gn d 1 2 3 cn8 vcc cn4 cn7 r2 r3 c2 c3 cn2 cn3 neg. input l gn d pos. input l gn d ju mp er j1 r6 r5 c5 c4 cn6 cn5 neg. input r gn d pos. input r gn d c1 r1 c6 r8 r4 r7 + c8 1u neg . ou tp ut l pos. output l neg . ou tp ut r pos. output r
STEVAL-CCA003V1 revision history 3/4 2 revision history table 1. document revision history date revision changes 28-jan-2008 1 initial release.
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