LM4950

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SNAS174E – JULY 2003 – REVISED MAY 2013

Figure 4. Typical Stereo Single-Ended (SE) Audio Amplifier Application Circuit

External Components Description

See Figure 1.

Components

Functional Description

This is the inverting input resistance that, along with RF, sets the closed-loop gain. Input resistance RIN and input

1. RIN

capacitance CIN form a high pass filter. The filter's cutoff frequency is fc = 1/(2πRINCIN).

This is the input coupling capacitor. It blocks DC voltage at the amplifier's inverting input. CIN and RIN create a highpass

2. CIN

filter. The filter's cutoff frequency is fC = 1/(2πRINCIN). Refer to SELECTING EXTERNAL COMPONENTS, for an

explanation of determining CIN's value.

3. RF

This is the feedback resistance that, along with Ri, sets closed-loop gain.

The supply bypass capacitor. Refer to the POWER SUPPLY BYPASSING for information about properly placing, and

4. CS

selecting the value of, this capacitor.

This capacitor filters the half-supply voltage present on the BYPASS pin. Refer to SELECTING EXTERNAL

5. CBYPASS

COMPONENTS for information about properly placing, and selecting the value of, this capacitor.

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