1 power supply (psu) interface (j901 and j900) – Texas Instruments TAS5518 User Manual
Page 12
www.ti.com
2.1
Power Supply (PSU) Interface (J901 and J900)
Output-Stage Power Supply
System Power Supply
RESET
>1 ms
4
1
2
3
PCB Connector
(Top View)
Power Supply (PSU) Interface (J901 and J900)
The TAS5518-5152K8EVM 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 the 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. Check the recommended
maximum supply voltage in the TAS5152 data sheet.
Table 2-1. Recommended Supply Voltages
VOLTAGE LIMITATIONS
CURRENT
DESCRIPTION
(4-
Ω
LOAD)
RECOMMENDATIONS
System power supply
15 V to 20 V
0.3 A
Output-stage power supply
0 V to 35 V
6 A
(1)
(1)
The rated current corresponds to two-channel full scale (80 W each), which is adequate for a
standard eight-channel amplifier design.
The recommended TAS5152 power-up sequence is shown in
. For proper TAS5152 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 (U73).
Figure 2-1. Recommended Power-Up Sequence
Figure 2-2. J901 and J900 Pin Numbers
Table 2-2. J901 Pin Description
PIN
NET NAME
DESCRIPTION
NO.
AT SCHEMATICS
1
PVDD
Output-stage power supply
2
SYSTEM
System power supply
3
GND
Ground
4
GND
Ground
System Interfaces
12
SLEU074 – June 2006