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TAS2780 Datasheet(PDF) 80 Page - Texas Instruments

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Part # TAS2780
Description  TAS2780 Digital Input Mono Class-D Audio Amplifier With Speaker IV Sense
PDF  96 Pages
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Manufacturer  TI [Texas Instruments]
Direct Link  http://www.ti.com
Logo TI - Texas Instruments

TAS2780 Datasheet(HTML) 80 Page - Texas Instruments

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Table 9-1. Recommended External Components (continued)
COMPONENT
DESCRIPTION
SPECIFICATION
MIN
TYP
MAX
UNIT
C6
DREG Decoupling Capacitor
Type
X7R
Capacitance, 20% Tolerance
1
µF
Rated Voltage
6
V
C7
IOVDD Decoupling Capacitor
Type
X7R
Capacitance, 20% Tolerance
1
µF
Rated Voltage
6
V
C8, C9
Bootstrap Capacitors
Type
X7R
Capacitance, 20% Tolerance
100
nF
Rated Voltage
6
V
Lf1, Lf2 (optional)
Optional EMI filter inductors. These are
not recommended as it degrades THD+N
performance. The TAS2780 device is a
filter-less Class-D and does not require
these bead inductors.
Impedance at 100MHz
120
Ω
DC Resistance
0.095
Ω
DC Current
7
A
Cf1, Cf2 (optional)
Optional EMI filter capacitors (must use Lf2,
Lf3 if Cf1, Cf2 used)
Capacitance
1
nF
9.3 Design Requirements
For this design example, use the parameters shown in Section 9.2.
Table 9-2. Design Parameters
DESIGN PARAMETER
EXAMPLE VALUE
Audio Input
Digital Audio, I2S
Current and Voltage Data Stream
Digital Audio, I2S
Mono or Stereo Configuration
Mono
Max Output Power at 1% THD+N,
RL = 4 Ω
25 W
9.4 Detailed Design Procedure
9.4.1 Mono/Stereo Configuration
In this application, the device is assumed to be operating in mono mode. See Section 8.3.1 for information on
changing the I2C address of the TAS2780 to support stereo operation. Mono or stereo configuration does not
impact the device performance.
9.4.2 EMI Passive Devices
The TAS2780 supports spread spectrum to minimize EMI. It is allowed to include passive devices on the
Class-D outputs. The passive devices Lf1, Lf2, Cf1 and Cf2 from Figure 9-1 have recommended specifications
provided in Table 9-1. The passive devices Lf1, Lf2, Cf1 and Cf2 have to be properly selected to maintain the
stability of the output stage. See Section 8.4.5 for details.
TAS2780
SLOSE75 – NOVEMBER 2021
www.ti.com
80
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Copyright © 2021 Texas Instruments Incorporated
Product Folder Links: TAS2780



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