2.1
Power Supply (PSU) Interface (J901)
Output stage power supply
RESET
>1ms
System power supply
4
1
2
3
(PCB connector top view)
Chapter 2
SLEU073 – JULY 2006
System Interfaces
This chapter describes the TAS5086-5186V6EVM board in regards to power supplies
and system interfaces.
The TAS5086-5186V6EVM module must be powered from external power supplies. High-end audio
performance requires a stabilized power supply, with low ripple voltage and low output impedance.
Note:
The length of power-supply cable must be minimized. Increasing length of PSU cable is
equal to increasing the distortion for the amplifier at high output levels and low
frequencies.
Maximum output-stage supply voltage depends of the speaker load resistance. Please check the
recommended maximum supply voltage in the TAS5186A data sheet.
Table 2-1. Recommended Supply Voltages
DESCRIPTION
VOLTAGE LIMITATIONS
CURRENT RECOMMENDATIONS
System power supply
15 V to 20 V
0.2 A
Output-stage power supply
0 V to 32 V
2 A
(1)
(1)
The rated current correspond to 2-channel full scale (30 W each), which most likely is adequate for
a standard 2.1-channel amplifier design.
The recommended TAS5186A power-up sequence is shown in
. For proper TAS5186A
operation, the RESET signal should be kept low during power up. RESET is pulled low during power up
for 200 ms by the onboard reset generator (U908).
Figure 2-1. Recommended Power-Up Sequence
Figure 2-2. J901 Pin Numbers
SLEU073 – JULY 2006
System Interfaces
7
