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TPA2001D1 Datenblatt(PDF) 10 Page - Texas Instruments

Teilenummer TPA2001D1
Bauteilbeschribung  1-W FILTERLESS MONO CLASS-D AUDIO POWER AMPLIFIER
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Hersteller  TI [Texas Instruments]
Direct Link  http://www.ti.com
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TPA2001D1 Datenblatt(HTML) 10 Page - Texas Instruments

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TPA2001D1
1-W FILTERLESS MONO CLASS-D AUDIO POWER AMPLIFIER
SLOS338D – SEPTEMBER 2000 – REVISED DECEMBER 2002
10
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
differential input
The differential input stage of the amplifier cancels any noise that appears on both input lines of the channel.
To use the TPA2001D1 EVM with a differential source, connect the positive lead of the audio source to the INP
input and the negative lead from the audio source to the INN input. To use the TPA2001D1 with a single-ended
source, ac ground the INN input through a capacitor and apply the audio single to the input. In a single-ended
input application, the INN input should be ac-grounded at the audio source instead of at the device input for best
noise performance.
shutdown modes
The TPA2001D1 employs a shutdown mode of operation designed to reduce supply current (IDD) to the absolute
minimum level during periods of nonuse for battery-power conservation. The SHUTDOWN input terminal
should be held high during normal operation when the amplifier is in use. Pulling SHUTDOWN low causes the
outputs to mute and the amplifier to enter a low-current state, IDD(SD) = 1 µA. SHUTDOWN should never be left
unconnected because amplifier operation would be unpredictable.
using low-ESR capacitors
Low-ESR capacitors are recommended throughout this application section. A real (as opposed to ideal)
capacitor can be modeled simply as a resistor in series with an ideal capacitor. The voltage drop across this
resistor minimizes the beneficial effects of the capacitor in the circuit. The lower the equivalent value of this
resistance the more the real capacitor behaves like an ideal capacitor.
evaluation circuit
INP
INN
SHUTDOWN
GAIN0
GAIN1
PVDD
OUTP
PGND
BYPASS
AGND
COSC
ROSC
VDD
PVDD
OUTN
PGND
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
U1
TPA2001D1
C5
1
µF
C6
1
µF
C7
1
µF
C1
220 pF
R1
120 k
C2
1
µF
C3
1
µF
J1
J2
C4
1
µF
C8
10
µF
R3
120 k
S1
R2
120 k
OUT+
VDD
OUT–
IN–
IN+
VDD
R4
120 k
SHUTDOWN
GND
GND
NOTE: R1, R2, and R3 are used in the EVM but are not required for normal applications.


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