GENERAL DESCRIPTION

The SSM22113 is a high performance audio amplifier that delivers 1 W rms of low distortion audio power into a bridge connected 8 Ω speaker load (or 1.5 W rms into a 4 Ω load).

It operates over a wide temperature range and is specified for single-supply voltages between 2.7 V and 5.5 V. When operating from batteries, it continues to operate down to 1.75 V.

This makes the SSM2211 the best choice for unregulated applications, such as toys and games. Featuring a 4 MHz bandwidth and distortion below 0.2 THD + N @ 1 W, superior performance is delivered at higher power or lower speaker load impedance than competitive units.

The low differential dc output voltage results in negligible losses in the speaker winding and makes high value dc blocking capacitors unnecessary. Battery life is extended by using shutdown mode, which typically reduces quiescent current drain to 100 nA.

The SSM2211 is designed to operate over the –40°C to +85°C temperature range. The SSM2211 is available in 8-lead SOIC (narrow body) and LFCSP (lead frame chip scale) surface mount packages. The advanced mechanical packaging of the LFCSP models ensures lower chip temperature and enhanced performance relative to standard packaging options.

Applications include personal portable computers, hands-free telephones and transceivers, talking toys, intercom systems, and other low voltage audio systems requiring 1 W output power.

FEATURES

1.5 W output1

Differential (BTL2) output

Single-supply operation: 2.7 V to 5.5 V

Functions down to 1.75 V

Wide bandwidth: 4 MHz

Highly stable phase margin: >80 degrees

Low distortion: 0.2 THD + N @ 1 W output

Excellent power supply rejection

APPLICATIONS

Portable computers

Personal wireless communicators

Hands-free telephones

Speaker phones

Intercoms

Musical toys and talking games