STEVAL-CCA016V1 Filter-free stereo 2.8 W Class-D audio power amplifier demo board with selectable 3D sound effects based on the TS4999 Data brief Features Operating range from V = 2.4 V to 5.5 V CC 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 STEVAL-CCA016V1 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. June 2009 Doc ID 15864 Rev 1 1/5 For further information contact your local STMicroelectronics sales office. www.st.com 5 Circuit schematic and BOM list STEVAL-CCA016V1 1 Circuit schematic and BOM list Figure 1. Schematic diagram Vcc P1 Vcc 1 2 VCC Vcc S5 3D C5 C6 C7 C1 100nF 1uF 1uF 220nF U1 C2 AVCC RPVCC LPVCC JP3 220nF LinP A1 Lin+ Lout+ A5 1 H Gain 2 PWM 3 LinN B2 Lin- Select Lout- A7 Bridge 4 S1 3 Header 4 2 1 VCC G0 C3 G0 G0 Oscillator G1 C5 G1 S2 3 2 1 VCC JP4 G1 RinP E1 Rin+ Rout+ E5 1 H Gain 2 PWM 3 RinN D2 Rin- Select Rout- E7 Bridge 4 C3 Header 4 220nF STBL A3 STBYL C4 Standby Protection STBR E3 STBYR Control Circuit 220nF AGND PGND TS4999 - FC18 S3 S4 STBL STBR VCC VCC 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 2/5 Doc ID 15864 Rev 1 JP2 JP1 GND 1 4 GND Rin+ 2 3 Lin- Rin- 3 2 Lin+ GND 4 1 GND 3 2 1 3 2 1 1 3D C1 2 3D EFFECT 3 B4 D4 D6 C7 B6