Overview

LV4991TH incorporates the power amplifier circuit operable at low voltage (2.7V or more) and has additionally the standby function to reduce the current drain. This is the best LSI for speaker drive for the battery-driven portable equipment, such as portable DVD player, Notebook PC, etc. The LV4991TH is a HMSOP8 (150mil) package, and The LV4991TT of MSOP8 (150mil) package is available.

Function and Feature

• Monaural BTL power amplifier incorporated

Standard output power 1 = 450mW (VCC = 3.6V, RL = 8Ω, THD = 10)

Standard output power 2 = 1000mW (VCC = 5V, RL = 8Ω, THD = 10)

Output coupling capacitor not necessary because of differential output type

• Operation at low voltage possible

VCC = 2.7V or more

• Standby function incorporated

Standard current drain at standby = 0.1µA (VCC = 3.6V)

• Second amplifier stop control function incorporated : Reducing the pop sound at startup, simple MUTE

• Overheat protection circuit incorporated

• Gain setting possible

BTL voltage gain = 0 to 26dB

• Output phase compensation capacitor not necessary