LM4906, LM4906LDBD, LM4906MMBD
www.ti.com SNAS191E – APRIL 2003 – REVISED MAY 2013 LM4906 1W, Bypass-Capacitor-less Audio Amplifier with
Internal Selectable Gain
Check for Samples: LM4906, LM4906LDBD, LM4906MMBD FEATURES DESCRIPTION The LM4906 is an audio power amplifier primarily
designed for demanding applications in mobile
phones and other portable communication device
applications. It is capable of delivering 1W of
continuous average power to an 8Ω BTL load with
less than 1% distortion (THD+N) from a +5V power
supply. 1 2 Selectable Gain of 6dB (2V/V) or 12dB (4V/V)
No Output or PSRR Bypass Capacitors
Required
Improved “Click and Pop” Suppression
Circuitry
Very Fast Turn on Time: 5ms (Typ)
Minimum External Components
2.6 -5.5V Operation
BTL Output Can Drive Capacitive Loads
Ultra Low Current Shutdown Mode (SD Low) APPLICATIONS Portable Computers
Desktop Computers
Multimedia Monitors KEY SPECIFICATIONS Improved PSRR at 217Hz for +3V: 71 dB
Power Output at +5V, THD+N = 1%, 8Ω: 1.0 W
(Typ) …
