Low Distortion 1.5W Audio Power Amplifier
Data Sheet
FEATURES
1.5 W output with THD + N < 1% Differential bridge-tied load output Single-supply operation: 2.7 V t...
Description
Data Sheet
FEATURES
1.5 W output with THD + N < 1% Differential bridge-tied load 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° Low distortion: 0.2% THD + N at 1 W output Excellent power supply rejection
APPLICATIONS
Portable computers Personal wireless communicators Hands-free telephones Speaker phones Intercoms Musical toys and talking games
GENERAL DESCRIPTION
The SSM22111 is a high performance audio amplifier that delivers 1 W rms of low distortion audio power into a bridgeconnected 8 Ω speaker load (or 1.5 W rms into a 4 Ω load).
The SSM2211 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% total harmonic distortion plus noise (THD + N) at 1 W, superior performance is delivered at higher power or lower speaker load impedance than competitive units. Furthermore, when the ambient temperature is at 25°C, THD + N < 1%, and VS = 5 V on a 4-layer printed circuit board (PCB), the SSM2211 delivers a 1.5 W output.
Low Distortion, 1.5 W Audio Power Amplifier SSM2211
FUNCTIONAL BLOCK DIAGRAM
IN– VOUTA
IN+
BYPASS SHUTDOWN
VOUTB
BIAS
V– (GND)
Figure 1.
SSM2211
00358-001
The low differential dc output voltage results in negligi...
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