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