Supply ramp

Supply

MUTE

Time for ac-coupling

capasitors to charge

11

TPA6139A2

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SLOS700C – JANUARY 2011 – REVISED APRIL 2016

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Device Functional Modes (continued)

9.4.2 Pop-Free Power Up

Pop-free power up is ensured by keeping the MUTE low during power-supply ramp-up and ramp-down. The pin

must be kept low until the input AC-coupling capacitors are fully charged before asserting the MUTE pin high to

precharge the AC-coupling; and, pop-less power up is achieved. Figure 10 illustrates the preferred sequence.

Figure 10. Power-Up Sequence