data brief for further information contact your local stmicroelectronics sales office. june 2009 doc id 15861 rev 1 1/4 4 STEVAL-CCA012V1 3 w filter-free class-d audio amplifier demonstration board with 6-12 db fixed gain select based on the ts2007 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: 1.4 w @ 5 v or 0.5 w @ 3.0 v into 8 with 1% thd+n max output power per channel: 2.3 w @ 5 v or 0.75 w @ 3.0 v into 4 with 1% thd+n max two fixed gain selects: 6 db or 12 db low current consumption efficiency: 88% (typ) signal-to-noise ratio: 90 db (typ) psrr: 68 db (typ) @ 217 hz with 6 db gain pwm base frequency: 280 khz low pop and click noise thermal shutdown protection output short-circuit protection rohs compliant description the STEVAL-CCA012V1 demonstration board is based on the ts2007fc audio power class-d amplifier, housed in a flip-chip package, which is capable of driving up to 1.4 w into an 8 load at 5 v. the device offers improved efficiency compared to typical class-ab audio amplifiers. the ts2007fc allows switching between two different gains: 6 or 12 db via a logic signal on the gs pin. pop and click reduction circuitry provides low on/off switching noise while allowing the device to start within 1 ms. an active low standby function permits lower current consumption (down to 1 a typ). the ts2007fc also integrates output short-circuit protection and thermal shutdown protection. the steval-cca012v demonstration board is constructed on a two-layer pcb with easily accessible connectors, allowing users to change or drive the gain select and standby control pin, and to change the input configuration. STEVAL-CCA012V1 am03155 www.st.com
circuit schematic STEVAL-CCA012V1 2/4 doc id 15861 rev 1 1 circuit schematic figure 1. schematic diagram c1 220nf c2 220nf 1 2 jp5 1 2 3 4 jp1 1 2 3 4 jp2 vcc vcc vcc c3 1uf 1 2 3 p1 1 2 3 p2 1 2 jp3 1 2 jp4 gnd gnd in - in + gnd gnd out+ out- gain select + - standby control a1 c1 a2 c2 a3 c3 b2 b3 pwm h bridge oscillator in - in + gs vcc out+ out- standby gnd protection circuit b1 vcc c f 7 0 0 2 s t 1 u am03156
STEVAL-CCA012V1 revision history doc id 15861 rev 1 3/4 2 revision history table 1. document revision history date revision changes 17-jun-2009 1 initial release.
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