LM4819, LM4819MBD

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SNAS133C – MAY 2004 – REVISED OCTOBER 2004

Typical Performance Characteristics (continued)

Power Dissipation vs

Power Dissipation vs

Output Power

Output Power

Frequency Response vs

Power Derating Curves

Input Capacitor Size

Supply Current vs

Supply Voltage

Application Information

BRIDGE CONFIGURATION EXPLANATION

closed-loop gain of the first amplifier (and the amplifier overall), whereas two internal 20k

Ω resistors set the

second amplifier's gain at -1. The LM4819 is typically used to drive a speaker connected between the two

amplifier outputs.

Figure 1 shows that the output of Amp1 servers as the input to Amp2, which results in both amplifiers producing

signals identical in magnitude but 180° out of phase. Taking advantage of this phase difference, a load is placed

differential gain of

(1)

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