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USING LOW-ESR CAPACITORS
EVALUATION CIRCUIT
RIGHT AUDIO INPUT+
TO SYSTEM CONTROL
TPA2000D2
C7
220 pF
C18
C2
C3
C4
LEFT AUDIO INPUT+
C17
C1
C6
C5
LEFT AUDIO OUTPUT+
C8
VDD
VDD
RIGHT AUDIO OUTPUT –
R1
120k
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
20
10
10 µF
LEFT AUDIO INPUT–
RIGHT AUDIO INPUT–
VDD
VDD
GAIN SELECT
GAIN SELECT
RIGHT AUDIO OUTPUT +
LEFT AUDIO OUTPUT–
TPA2000D2
SLOS291F – MARCH 2000 – REVISED MARCH 2007
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.
Table 3. TPA2000D2 Application Bill of Materials
REFERENCE DESCRIPTION SIZE QUANTITY MANUFACTURER PART NUMBER
C1-4, C17-21 Capacitor, ceramic chip, 0.1 µF, ±10%, X7R, 50 V 0805 9 Kemet C0805C104K5RAC
C5 Capacitor, ceramic, 1.0 µF, 80%/-20%, Y5V, 16 V 0805 1 Murata GRM40-Y5V105Z16
C6, C8 Capacitor, ceramic, 10 µF, 80%/-20%, Y5V, 16 V 1210 2 Murata GRM235-Y5V106Z16
C7 Capacitor, ceramic, 220 pF, ±10%, XICON, 50 V 0805 2 Mouser 140-CC501B221K
R1 Resistor, chip, 120 k Ω , 1/10 W, 5%, XICON 0805 1 Mouser 260-120K
IC, TPA2000D2, audio power amplifier, 2-W, 24 pin
U1 1 TI TPA2000D2PWP
2-channel, class-D TSSOP
14
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