TS4604 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
TS4604
STMicroelectronics
'TS4604' PDF : 31 Pages View PDF
Application information
TS4604
With a gain set at G = 0 dB, a Rin = 10 kΩ and Cin = 2.2 µF, to charge Cin to 95% of its final
value, 66 ms are necessary.
Wake-up time of the TS4604
The TS4604 needs 30 ms to become fully operational (see Table 5 and Table 6).
The total startup sequence with the settings described being 66 ms, and since the TS4604
needs 30 ms to wake up, the Enable pin for the line driver and/or headphone can be set high
36 ms after the power supply has reached its normal value (Figure 55).
With a lower input capacitance, the startup phase is quicker.
Figure 55. Power-up/down sequence
Supply
Supply ramp
EN_xx
36 ms
Vout
30 ms
66 ms
AM06148
6.13
Layout recommendations
Particular attention must be given to the correct layout of the PCB traces and wires between
the amplifier, load and power supply.
The power and ground traces are critical since they must provide adequate energy and
grounding for all circuits. Good practice is to use short and wide PCB traces to minimize
voltage drops and parasitic inductance.
Proper grounding guidelines help improve audio performances, minimize crosstalk between
channels, and prevent switching noise from coupling into the audio signal. It is also
recommended to use a large-area and multi-via ground plane to minimize parasitic
impedance.
Connect all the VCC tracks (PVCCLD and PVCCHP) to one point one the board.
The copper traces that connect the output pins to the load and supply pins should be as
wide as possible to minimize the trace resistances.
The gain setting resistors must be placed as close as possible to the input in order to
minimize the parasitic capacitors on these inputs pins.
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Doc ID 17913 Rev 1
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