Low voltage differential audio power amplifier
Features
■ TS4994 low voltage differential audio power
amplifier with Programmable standby mode
■ Operates from V
■ 1 W output power @ V
F=1 kHz, with 8 W load
■ Ultra low power consumption in standby mode
(10 nA)
■ 100 dB PSRR @ 217 Hz in grounded mode
(Av=1 V/V)
■ Near zero pop & click
■ Ultra low distortion (0.1%)
■ Module gain set at 1V/V
■ Thermal and short-circuit protection
=2.5 V to 5.5 V
CC
=5 V, THD+N=1%,
CC
STEVAL-CCA002V1
based on the TS4994
Data Brief
Description
This evaluation board is designed with the
TS4994 low power diff erential audio amplifier . The
micro-package DFN10 (dual flat non-leaded 10
pins) allows space saving and good thermal
dissipation. The differential gain is set at 1 V/V
and can be adapted as necessary through a
modification of the R1 to R4 values.
Equation 1
R2
R4
Av
------- R1
On the board, you can set the Cn3 and Cn4
jumpers can be set to modify the input
configuration from capacitor coupled to common
mode feedback. In capacitor coupled
configuration, the -3dB cut-off frequency in Hz is:
Equation 2
---------------------------------------------- -
6.28 R1 C1⋅⋅()
with R in ohms, C in farads and C1=C2. F or more
detailed information about component calculation,
refer to the TS4994 datasheet.
------- -==
R3
1
with
R2 R4=
with
R1 R3=
---------------------------------------------- -=
1
6.28 R3 C2⋅⋅()
STEVAL-CCA002V1
December 2007 Rev 1 1/4
For further information contact your local STMicroelectronics sales office .
www.st.com
4
Board schematic STEVAL-CCA002V1
1 Board schematic
Figure 1. Schematic
2/4
STEVAL-CCA002V1 Revision history
2 Revision history
Table 1. Document revision history
Date Revision Changes
19-Dec-2007 1 Initial release
3/4
STEVAL-CCA002V1
y
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