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1

C

B

55 k

Ω

v

1

C

1

R

(8)

USING LOW-ESR CAPACITORS

3.3-V VERSUS 1.6-V OPERATION

TPA6100A2D

SLOS269B – JUNE 2000 – REVISED SEPTEMBER 2004

Low-ESR capacitors are recommended throughout this application. A real 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.

The TPA6100A2D was designed for operation over a supply range of 1.6 V to 3.6 V. There are no special

considerations for 1.6-V versus 3.3-V operation as far as supply bypassing, gain setting, or stability. The most

important consideration is that of output power. Each amplifier can produce a maxium output voltage swing within

a few hundred millivolts of the rails with a 10-k

Ω load. However, this voltage swing decreases as the load

32-

Ω load, the maximum peak output voltage with V

This reduced voltage swing effectively reduces the maximum undistorted output power.

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