LM4802B, LM4802BLQBD
www.ti.com SNAS243D – MAY 2004 – REVISED MAY 2013 LM4802B Boomer Audio Power Amplifier Series Audio Power Amplifier with Boost
Converter to Drive Ceramic Speakers
Check for Samples: LM4802B, LM4802BLQBD FEATURES DESCRIPTION The LM4802B integrates a Boost Converter with an
Audio Power Amplifier to drive Ceramic Speakers in
portable applications. When powered by a 3V supply,
it is capable of forcing 12Vp-p across a 2μF + 30Ω
bridge-tied-load (BTL) with less than 1% THD+N. 1 2 Pop & Click Circuitry Eliminates Noise During
Turn-On and Turn-Off Transitions
Low, 2ОјA (Max) Shutdown Current
Low, 12mA (Typ) Quiescent Current
12Vp-p Mono BTL Output, Load = 2μF + 30Ω,
VDD = 3V
Short Circuit Protection
Unity-Gain Stable
External Gain Configuration Capability APPLICATIONS Cellphone
PDA KEY SPECIFICATIONS Quiescent Power Supply Current: 12mA (Typ)
BTL Voltage Swing (2μF + 30Ω Load, 1%
THD+N, VDD = 3V): 12Vp-p (typ)
Shutdown Current: 2ОјA (max) Boomer audio power amplifiers were designed
specifically to provide high quality output power with a
minimal amount of external components. The
LM4802B does not require bootstrap capacitors, or …
