Stereo 2.7-W Audio Power Amplifier

Features:

Low Operating Current with 14mA

ImprovedDepop Circuitry to Eliminate

Turn-on and Turn-off Transients in Outputs High PSRR

32 Steps VolumeAdjustable by DC Voltage with Hysteresis

2W per Channel Output Power into 4W Load at 5V, BTL Mode

Two Output ModesAllowable with BTL and SE Modes Selected by SE/BTL pin

Low Current Consumption in Shutdown Mode (50mA)

Short Circuit Protection

Power Off Depop Circuit Integration

PDIP-16 & SOP-16 PackagesAvailable

Lead FreeAvailable (RoHS Compliant)

General Description:

APA2065 is a monolithic integrated circuit, which provides precise DC volume control, and a stereo bridged audio power amplifiers capable of producing 2.7W(2.0W) into 3W withless than10%(1.0%)THD+N. The attenuatorrange of the volumecontrol inAPA2065 is from 20dB (DC_Vol=0V) to -80dB (DC_Vol=3.54V) with 32 steps. The advantage of internal gain setting can be less components and PCB area. Both of the depop circuitry and the thermal shutdown protection circuitry are integrated in APA2065, that reduce pops and clicks noise during power up or shutdown mode operation. It also improves the power off pop noise and protects the chip from being destroyed by over temperature and short current failure. To simplify the audio system design, APA2065 combines a stereo bridge-tied loads (BTL) mode for speaker drive and a stereo single-end (SE) mode for headphone drive into a single chip, where both modes are easily switched by the SE/BTL input control pin signal.

Circuit Diagram:

Stereo 2.7-W Audio Power Amplifier