Class AB Audio Amplifiers

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NXP Semiconductors offers a 3W Mono Class AB, BTL audio amplifier for portable applications. The SA58631 is a single-channel audio amplifier that provides output power of 3W with an 8Ω load using a 9V supply. Housed in an HVSON8 package with an exposed die-attach paddle, it delivers excellent thermal resistance and increased power dissipation.

For dual-channel requirements, NXP offers a 2.2W Class AB, BTL audio amplifier for portable applications—the SA58632. The device is housed in a 20-pin HVQFN package with a body size of only 6 x 5mm and a lead pitch of only 0.85mm. The package has an exposed die-attach paddle, reducing junction-to-ambient thermal resistance and increasing power dissipation.

Both devices support operating systems that run between 2 and 18V.

 

FEATURES Low junction-to-ambient thermal resistance Fixable gain (6 to 30dB) Low standby current (<10µA) Standby mode controlled by CMOS-compatible levels No switch-on/switch-off plops High PSRR (50dB minimum) ESD protection Output short-circuit-to-ground protection Thermal-shutdown protection Wide supply voltage operating range (2 to 18V) BTL/SE select pin for speakers or headphones (SA58632) HVSON8 package (4 x 4 x 0.8 mm) (SA58631) HVQFN20 package (6 x 5 x 0.85 mm) (SA58632)

APPLICATIONS Mobile radios 9 and 12V speakers Toys and games PC sound cards LCD TVs Security systems

 

 

SA58631 - 3W BTL Audio Amplifier

The SA58631 is a one channel audio amplifier in an HVSON8 package. It provides power output of 3W with an 8Ω load at 9V supply. The internal circuit is comprised of a BTL (Bridge Tied Load) amplifier with a complementary PNP-NPN output stage and standby/mute logic. The SA58631 is housed in an 8-pin HVSON 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 6dB to 30dB Standby mode controlled by CMOS-compatible levels Low standby current < 10uA No switch-on/switch-off plops High power supply ripple rejection: 50dB minimum Electro Static Discharge (ESD) protection Output short circuit to ground protection Thermal shutdown protection

 

 

 

SA58632 - 2 x 2.2W BTL Audio Amplifier

The SA58632 is a two-channel audio amplifier in an HVQFN20 package. It provides power output of 2.2W per channel with an 8Ω load at 9V supply. The internal circuit is comprised of two BTL (Bridge-Tied Load) amplifiers with a complementary PNP-NPN output stage and standby/mute logic. The SA58632 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 6dB to 30dB Standby mode controlled by CMOS-compatible levels Low standby current < 10uA No switch-on/switch-off plops High power supply ripple rejection: 50 dB minimum Electro Static Discharge (ESD) protection Output short circuit to ground protection Thermal shutdown protection

 

 

 

 Featured Products

Part Number		Description	Data Sheet	App. Notes
SA58631TK-T		3W Class AB, BTL Audio Amplifier
SA58632BS-T		2 x 2.2W BTL Audio Amplifier

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