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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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