Data brief
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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 VCC = 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 Ω with 1% THD+N max
■Output power per channel: 1.85 W @5 V into 4
Ω 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 Ω
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
3S2
G1
2
1
3S1
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
PGNDAGND
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 µF/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.
STEVAL-CCA011V1
6/6 Doc ID 15789 Rev 1
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