data brief for further information contact your local stmicroelectronics sales office. june 2009 doc id 15864 rev 1 1/5 5 STEVAL-CCA016V1 filter-free stereo 2.8 w class-d audio power amplifier demo board with selectable 3d sound effects based on the ts4999 features operating range from v cc = 2.4 v to 5.5 v dedicated standby mode active low for each channel output power per channel: 2.8 w at 5 v into 4 ? with 10% thd+n output power per channel: 0.7 w at 3.6 v into 8 ? with 1% thd+n max. selectable 3d sound effect four gain setting steps: 3.5, 6, 9.5 and 12 db. low current consumption psrr: 63 db typ @ 217 hz. fast start-up phase: 7.8 ms output short-circuit and thermal shutdown protection rohs compliant description this demonstration board is designed to evaluate the performances of ts4999, that is a stereo fully differential class-d power amplifier. it can drive up to 1.35 w into a 8 ? load at 5 v per channel. the device has four different gain settings utilizing two discrete pins, g0 and g1. pop and click reduction circuitry provides low on/off switch noise while allowing the device to start within 8 ms. 3d enhancement effects are selected through one digital input pin that allows more amazing stereo audio sound. two standby pins (active low) allow each channel to be switched off separately. the ts4999 is available in a 18 bumps flip-chip package. STEVAL-CCA016V1 www.st.com
circuit schematic and bom list STEVAL-CCA016V1 2/5 doc id 15864 rev 1 1 circuit schematic and bom list figure 1. schematic diagram gain select oscillator pwm pwm gain select standby control protection circuit bridge h bridge h lin+ lin- g0 g1 rin+ rin- stbyl stbyr lout+ d4 d6 a5 a7 e5 e7 c7 b4 e3 a3 d2 e1 c5 c3 b2 a1 lout- rout+ rout- rpvcc pgnd agnd avcc 3d effect c1 3d b6 lpvcc u1 ts4999 - fc18 c1 220nf c2 220nf c3 220nf c4 220nf 2 1 3 s2 g1 2 1 3 s1 g0 2 1 3 s3 stbl 2 1 3 s4 stbr vcc vcc vcc vcc linp linn g0 g1 rinp rinn stbl stbr 1 2 3 4 jp1 1 2 3 4 jp2 lin+ lin- gnd gnd rin+ rin- gnd gnd vcc 1 2 p1 vcc c6 1uf c7 1uf c5 100nf 2 1 3 s5 3d vcc vcc 1 2 3 4 jp4 header 4 1 2 3 4 jp3 header 4 table 1. components list for the demonstration board designation quantity description c1, c2, c3, c4 4 220 nf/16 v, smd ceramic capacitor, 0603 c5 1 100 nf/16 v, smd ceramic capacitor, 0603 c6, c7 1 1 f/16 v, smd ceramic capacitor, 0603 p1 1 2-pin header 2.54 mm pitch s1, s2, s3, s4, s5 5 3-pin header 2.54 mm pitch jp1, jp2, jp3, jp4 4 4-pin header 2.54 mm pitch u1 1 ts4999 class-d audio amplifier
STEVAL-CCA016V1 demonstration board layouts doc id 15864 rev 1 3/5 2 demonstration board layouts the following figures depict the top view and layers of the demonstration board. figure 2. pcb top layer figure 3. pcb middle layer 1 figure 4. pcb middle layer 2 figure 5. pcb bottom layer
revision history STEVAL-CCA016V1 4/5 doc id 15864 rev 1 3 revision history table 2. document revision history date revision changes 11-jun-2009 1 initial release.
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