General description

The SA58637 is a two-channel audio amplifier in an HVQFN20 package. It provides power output of 2.2 W per channel with an 8 Ω load at 9 V supply. The internal circuit is comprised of two Bridge-Tied Load (BTL) amplifiers with a complementary PNP-NPN output stage and standby/mute logic. The SA58637 is housed in a 20-pin HVQFN package, which has an exposed die attach paddle enabling reduced thermal resistance

and increased power dissipation.

Features

■ Low junction-to-ambient thermal resistance using exposed die attach paddle

■ Gain can be fixed with external resistors from 6 dB to 30 dB

■ Standby mode controlled by CMOS-compatible levels

■ Low standby current < 10 µA

■ No switch-on/switch-off plops

■ High power supply ripple rejection: 50 dB minimum

■ ElectroStatic Discharge (ESD) protection

■ Output short circuit to ground protection

■ Thermal shutdown protection

Applications

■ Professional and amateur mobile radio

■ Portable consumer products: toys and games

■ Personal computer remote speakers