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2.1

PSU Interface

2.2

PSU Connector (J70)

PSU Interface

The TAS5508-5122C6EVM module must be powered from one or two external regulated power

supplies. High audio performance requires a stabilized output stage 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 TAS5122 datasheet.

Table 2-1. Recommended Power Supplies

DESCRIPTION

VOLTAGE LIMI-

CURRENT RECOMMENDATIONS

TATIONS(4-8

Ω

LOAD)

System power supply

15 V – 25 V

0.25 A

Output power stage supply

0 – 25 V

(1) The rated current correspond to two channels (Ch 1-5) full scale (15W/4ohm each) + one channel (CH

6) full scale (30W/8ohm), which most likely is adequate for a standard 6 channel amplifier design.

The recommended TAS5122 power-up sequence is shown in the following figure. For proper

TAS5122 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 (U80).

Figure 2-1. Recommended Power Up Sequence

Figure 2-2. J70 Pin Numbers (PCB connector top view)

System Interfaces

12

SLEU058 – October 2004