Texas Instruments SLEU056 - Manual (Page 22)

Power Supply
3-2
3.1 Power Supply
The TAS5010−5112F2EVM can be powered from one or two external power
supplies. High-end audio performance requires a stabilized power supply with
low ripple voltage and low output impedance.
Note:
The length of the power supply cable must be minimized. Increasing the
length of the PSU cable is equal to increasing the distortion for the amplifier
at high output levels and low frequencies.
3.1.1 Power the EVM by One Power Supply
A single power supply can be connected to the TAS5010−5112F2EVM board.
Short VHBR and V+ at the power cable (red and white plugs).
Voltage for the connected power supply is not allowed to be below 15 V. The
maximum supply voltage depends of the speaker load resistance. Check the
recommended maximum supply voltage in the TAS5112ADFD data sheet
(SLES094).
Table 3−1. Maximum Supply Voltage (Single Supply)
R
LOAD
= 6 Ω
Supply voltage (VHBR and V+) 29.5 V
3.1.2 Power the EVM With Two Power Supplies
When two supplies power the TAS5010−5112F2EVM, it is possible to adjust
the output power with the level of the voltage VHBR (pin 1 at J640). The
minimum VHBR voltage is 0 V. The maximum voltage depends of the load
resistance. Check the recommended maximum supply voltage in the
TAS5112ADFD data sheet (SLES094).
Table 3−2. Maximum H-bridge Voltage vs Load Impedance
R
LOAD
= 6 Ω
Maximum VHBR voltage 29.5 V
V+ voltage 15 V – 20 V
Figure 3−1. Recommended Power-Up and Power-Down Sequence
V+
VHBR
>1 ms >1 ms