TAS5721 datasheet(64/71 Pages) TI1

tên linh kiện	TAS5721

Giải thích chi tiết về linh kiện	Digital Audio Power Amplifier with EQ, DRC, 2.1 Support, and Headphone/Line Driver

PDF	71 Pages

Scroll/Zoom	100%

nhà sản xuất	TI1 [Texas Instruments]

Trang chủ	http://www.ti.com

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64 / 71 page

Supply Ramp

Supply

DR_SD

Time for AC-Coupling

Capacitors to Charge

T0463-02

Inverting Input

–In

TAS5721

–

TAS5721

SLOS739 – JULY 2012

www.ti.com

The component values can be calculated with the help of the TI FilterPro™ program available on the TI website

at: focus.ti.com

Figure 76. Second-Order Active Low-Pass Filter

The resistor values should have a low value for obtaining low noise, but should also have a high enough value to

get a small size ac-coupling cap. The C2 can be split in two with the midpoint connected to GND; this can

increase the common-mode attenuation.

Pop-Free Power Up

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

should be kept low until the input AC-coupling capacitors are fully charged before asserting the DR_SD pin high,

this way proper precharge of the AC-coupling capacitors is performed and pop-less power up is achieved.

Figure 77 illustrates the preferred sequence.

Figure 77. Power Up or Down Sequence

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