Application information

TS4909

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Example calculation:

with standard value which gives a lower cut-off frequency equal to 20.4Hz.

In this case,

This value is sufficient with regards to the previous formula, so we can state that the pop will

be imperceptible.

Connecting the headphones

Generally headphones are connected using a jack connector. To prevent pop in the

headphones while plugging in the jack, a pulldown resistor should be connected in parallel

headphones are plugged in.

A resistor of 1 k

Ω is high enough to be a negligible load, and low enough to charge the

4.8

Standby mode

circuitry in standby mode, is a few microseconds.

Figure 83.

Internal equivalent circuit schematics of the TS4909 in standby mode

25K

25K

1M

1M

Vin1

BYPASS

Vin2

Vout1

Vout2

GND

Vout3