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TPA2001D2PWPR Folha de dados(PDF) 10 Page - Texas Instruments

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Nome de Peças TPA2001D2PWPR
Descrição Electrónicos  1-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER
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Fabricante Electrônico  TI [Texas Instruments]
Página de início  http://www.ti.com
Logo TI - Texas Instruments

TPA2001D2PWPR Folha de dados(HTML) 10 Page - Texas Instruments

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TPA2001D2
1-W FILTERLESS STEREO CLASS-D AUDIO POWER AMPLIFIER
SLOS292A – MARCH 2000 – REVISED APRIL 2000
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 a channel. To
use the TPA2001D2 EVM with a differential source, connect the positive lead of the audio source to the RINP
(LINP) input and the negative lead from the audio source to the RINN (LINN) input. To use the TPA2001D2 with
a single-ended source, ac ground the RINN and LINN inputs through a capacitor and apply the audio single to
the RINP and LINP inputs. In a single-ended input application, the RINN and LINN inputs should be ac grounded
at the audio source instead of at the device inputs for best noise performance.
shutdown modes
The TPA2001D2 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
RIN–
RIN+
S1
SHUTDOWN
LIN–
TPA2001D2
U1
C7
220 pF
GND
120 k
R1
R3
120 k
C18
C2
C3
C4
LIN+
GND
C17
C1
C6
C5
LOUT–
LOUT+
GND
C8
10 uF
VDD
VDD
GND
ROUT+
GND
ROUT–
GND
R2
120k
R4
120 k
C19
C20
C21
0.1
µF
0.1
µF
0.1
µF
0.1
µF
0.1
µF
0.1
µF
1
µF
10
µF
0.1
µF
0.1
µF
0.1
µF
SHUTDOWN
PGND
LOUTN
GAIN0
LPVDD
LINN
AGND
COSC
RINN
RPVDD
ROUTN
PGND
PGND
LOUTP
BYPASS
LPVDD
LINP
VDD
ROSC
RINP
RPVDD
GAIN1
ROUTP
PGND
NOTE: R1, R3, and R4 are used in the EVM but are not required for normal applications.


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