data brief for further information contact your local stmicroelectronics sales office. june 2009 doc id 15789 rev 1 1/6 6 STEVAL-CCA011V1 filter-free stereo 2x2.5 w class-d audio power amplifier demonstration board based on the ts2012fc features operating range from v cc = 2.5 v to 5.5 v dedicated standby mode active low for each channel output power per channel: 1.15 w @5 v or 0.63 w @ 3.6 v into 8 ? with 1% thd+n max output power per channel: 1.85 w @5 v into 4 ? with 1% thd+n max output short-circuit protection four gain select settings: 6, 12, 18, 24 db low current consumption psrr: 63 db typ @ 217 hz with 6 db gain fast start-up phase: 8 ms thermal shutdown protection rohs compliant description this demonstration board is based on ts2012fc that is a fully differential class-d stereo power amplifier able to drive up to 1.15 w into an 8 ? load at 5 v per channel. it achieves better efficiency compared to typical class-ab audio amps. the device has four different gain settings that use two digital pins: g0 and g1. pop and click reduction circuitry provides low on/off switch noise while allowing the device to start within 8 ms. two standby pins (active low) allow each channel to be switched off independently. the ts2012fc also integrates output short- circuit protection and thermal shutdown protection and it is available in a 16-bumps flip-chip package. STEVAL-CCA011V1 www.st.com
circuit schematics STEVAL-CCA011V1 2/6 doc id 15789 rev 1 1 circuit schematics figure 1. schematic diagram c1 220nf vcc c2 220nf c3 220nf c4 220nf vcc 2 1 3 s2 g1 2 1 3 s1 g0 2 1 3 s3 stbl 2 1 3 s4 stbr vcc vcc 1 2 p1 vcc vcc vcc linp linn g0 g1 rinp rinn stbl stbr pgnd vcc vcc gain select oscillator pwm pwm gain select standby control protection circuit bridge h bridge h lin+ lin- g0 g1 rin+ rin- stbyl stbyr lout+ d2 a2 a3 a4 d3 d4 c4 c3 b3 b4 c1 d1 b2 c2 b1 a1 lout- rout+ rout- pvcc pgnd agnd avcc u1 ts2012 - fc16 c6 1uf c5 100nf 1 2 3 4 jp1 1 2 3 4 jp2 1 2 3 4 jp4 header 4 1 2 3 4 jp3 header 4 lin+ lin- gnd gnd rin+ rin- gnd gnd 1 2 jp5 1 2 jp6 1 2 jp7 1 2 jp8 table 1. component 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 1 1 f/16 v, smd ceramic capacitor, 0603 p1, jp5, jp6, jp7, jp8 5 2-pin header 2.54 mm pitch s1, s2, s3, s4 4 3-pin header 2.54 mm pitch jp1, jp2, jp3, jp4 4 4-pin header 2.54 mm pitch u1 1 ts2012eijt
STEVAL-CCA011V1 demonstration board layout doc id 15789 rev 1 3/6 2 demonstration board layout 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
demonstration board layout STEVAL-CCA011V1 4/6 doc id 15789 rev 1 figure 6. top view and dimensions of the demonstration board
STEVAL-CCA011V1 revision history doc id 15789 rev 1 5/6 3 revision history table 2. document revision history date revision changes 03-jun-2009 1 initial release.
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