Demonstration board for 2x1 W differential input stereo audio
Features
STEVAL-CCA008V1
amplifier based on the TS4998
Data Brief
■ Operating range from V
■ 1 W output power per channel
@V
=5 V,THD+N =1%, RL =8 Ω
CC
■ Ultra low standby consumption:10 nA typ.
■ 80 dB PSRR @ 217 Hz with grounded inputs
■ High SNR: 106 dB(A) typ.
■ Fast startup time: 45 ms typ.
■ Circuit free of Pop and click
■ Dedicated standby pin per channel
■ Lead-free QFN16 4x4mm package
= 2.7 V to 5.5 V
CC
Description
The demonstration board STEVAL-CCA008V1 is
made to evaluate the TS4998 that is designed for
top-class stereo audio applications. Thanks to its
compact and power-dissipation efficient QFN16
package with exposed pad, it suits a variety of
applications. With a BTL configuration, this audio
power amplifier is capable of delivering 1 W per
channel of continuous RMS output power into an
8 Ω load at 5 V.
STEVAL-CCA008V1
Each output channel (left and right) also has its
own external controlled standby mode pin to
reduce the supply current to less than 10 nA per
channel. The device also features an internal
thermal shutdown protection. The gain of each
channel can be configured by external gain
setting resistors.
February 2009 Rev 1 1/4
For further information contact your local STMicroelectronics sales office.
www.st.com
4
Circuit schematic STEVAL-CCA008V1
1 Circuit schematic
Figure 1. Schematic
VCC
JP1
JP2
Cn1
Cn2
Cn3
Cn4
Cin1
330nF
Cin2
330nF
Cin3
330nF
Cin4
330nF
4
3
2
1
4
3
2
1
R1
24k
R2
24k
R3
24k
R4
24k
TS4998 - QFN16
TS4998
1
LI N-
2
LI N+
4
RIN-
3
RIN+
14
Bypass
1uF
Cb
LEFT
RIGHT
BIASSTBY
GND GND
6
5
Cn8
13
Vcc
12
STBYR
7
VCC
LOUT -
11
LOUT +
9
ROUT-
10
ROUT+
U1
1
2
3
Cn9
-
+
-
+
STBYL
8
VCC
1
2
3
Cs1
1uF
Cs2
100nF
Cn5
Cn6
Cn7
2/4
STEVAL-CCA008V1 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
09-Feb-2009 1 Initial release.
3/4
STEVAL-CCA008V1
y
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