2.1.2
PSU Interface
Installation
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Figure 4. Connecting TAS5706EVM2 to MC57xxPSIA
The TAS5706EVM2 is powered by two power supplies connected to the MC57xx controller board: a 5-V
power supply (VIN) and a 10-V to 26-V (PVCC) power supply. The 3.3-V level is generated on the board
by a voltage regulator from the 5-V supply.
Note:
The power-supply cable length must be minimized. Increasing the length of the PSU cable
increases the distortion of the amplifier at high output levels and low frequencies
The maximum output-stage supply voltage depends on the speaker load resistance. Check the
recommended maximum supply voltage in the TAS5706A (
) data sheet.
Table 1. Recommended Power Supplies
Description
Voltage Limitations (8-
Ω
Load)
Current Recommendations
System power supply
5 V
1 A
Output power stage supply
10–26 V
4 A
(1)
(1)
The rated current corresponds to two channels, full scale.
TAS5706EVM2
6
SLOU220 – September 2008