TAS5802PWPR datasheet(82/106 Pages) TI2

82 / 106 page

Load

spea

power

output

peak

Power

Output

Max

ker_

2 u

(3)

Same PVDD and switching frequency, larger inductance means smaller idle current for lower power dissipation.

It's suggested that inductor's saturation current Isat, is larger than the amplifier's peak current during power-up

and play audio.

)

max(

power

output

peak

clipping

peak

power

peak

SAT

(4)

In addition, the effective inductance at the peak current is required to be at least 80% of the inductance value in

Table 8-2, to meet datasheet specifications.

The minimum inductance is given in Table 8-2.

Table 8-2. LC filter recommendation

Switching Frequency (kHz)

Modulation Scheme

Recommended Minimum Inductance (uH) for LC filter

design

1024

1SPW

3.3 µH (or larger) + Capacitor (0.22uF~0.68uF)

768

4.7 µH (or larger) + Capacitor (0.22uF~0.68uF)

384 or 480

10 µH (or larger) +Capacitor (0.22uF~0.68uF)

384~1024

8.2uH (or Larger) +Capacitor (0.22uF~0.68uF)

For inductor selection refer to LCFILTER-CALC-TOOL.

8.1.3 Power Supply Decoupling

To ensure high efficiency, low THD, and high PSRR, proper power supply decoupling is necessary. Noise

transients on the power supply lines are short duration voltage spikes. These spikes can contain frequency

components that extend into the hundreds of megahertz. The power supply input must be decoupled with some

good quality, low ESL, Low ESR capacitors larger than 22µF. These capacitors bypasses low frequency noise

to the ground plane. For high frequency decoupling, place 1µF or 0.1µF capacitors as close as possible to the

PVDD pins of the device.

8.1.4 Output EMI Filtering

The TAS5802 device is often used with a low-pass filter, which is used to filter out the carrier frequency of the

PWM modulated output. This filter is frequently referred to as the L-C Filter, due to the presence of an inductive

element L and a capacitive element C to make up the 2-pole filter.

The L-C filter removes the carrier frequency, reducing electromagnetic emissions and smoothing the current

waveform which is drawn from the power supply. The presence and size of the L-C filter is determined by several

system level constraints. In some low-power use cases that have no other circuits which are sensitive to EMI, a

simple ferrite bead or a ferrite bead plus a capacitor can replace the tradition large inductor and capacitor that

are commonly used. In other high-power applications, large toroid inductors are required for maximum power

and film capacitors can be used due to audio characteristics. Refer to the application report Class-D LC Filter

Design (SLOA119) for a detailed description on the proper component selection and design of an L-C filter

based upon the desired load and response.

TAS5802

SLASFB7A – NOVEMBER 2024 – REVISED AUGUST 2025

www.ti.com

Submit Document Feedback

Product Folder Links: TAS5802

TAS5802PWPR Datasheet(PDF) 82 Page - Texas Instruments

TAS5802PWPR Datasheet(HTML) 82 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL