LM4670SD/NOPB ,Filterless High Efficiency 3W Switching Audio Amplifier 8-WSON -40 to 85Electrical CharacteristicsThe following specifications apply for A = 2V/V (R = 150kΩ), R = 15µH + 8 ..
LM4671ITL , Filterless High Efficiency 2.5W Switching Audio Amplifier
LM4673SD/NOPB ,Filterless, 2.65W, Mono, Class D Audio Power Amplifier 8-WSON -40 to 85Electrical CharacteristicsThe following specifications apply for A = 2V/V (R = 150kΩ), R = 15µH + 8 ..
LM4674ATLX/NOPB ,Filterless 2.5 Stereo Class D Audio Power Amplifier 16-DSBGA -40 to 85Electrical Characteristics V = 3.6VDDThe following specifications apply for A = 6dB, R = 15µH + 8Ω ..
LM4674ATLX/NOPB ,Filterless 2.5 Stereo Class D Audio Power Amplifier 16-DSBGA -40 to 85features• Mobile Phones85% efficiency at P = 500mW. Four gain options areO• PDAspin selectable thro ..
LM4674SQ/NOPB ,Filterless 2.5 Stereo Class D Audio Power Amplifier 16-WQFN -40 to 85features85% efficiency at P = 500mW. Four gain options areO• Mobile Phonespin selectable through th ..
LP2966IMM-2525 ,Dual 150mA Ultra Low-Dropout RegulatorLP2966 Dual 150mA Ultra Low-Dropout RegulatorMay 2001LP2966Dual 150mA Ultra Low-Dropout Regulator
LP2966IMM-2828 ,Dual 150mA Ultra Low-Dropout RegulatorFeaturesn Ultra low drop-out voltageThe LP2966 dual ultra low-dropout (LDO) regulator operatesfrom ..
LP2966IMM-2828 ,Dual 150mA Ultra Low-Dropout RegulatorBlock Diagram10085031Connection Diagram10085032Top ViewMini SO-8 Package8-Lead Small Outline Integr ..
LP2966IMM-2830 ,Dual 150mA Ultra Low-Dropout RegulatorFeaturesn Ultra low drop-out voltageThe LP2966 dual ultra low-dropout (LDO) regulator operatesfrom ..
LP2966IMM-3030 ,Dual 150mA Ultra Low-Dropout RegulatorApplicationsDropout Voltage: Varies linearly with load current. Typicallyn Cellular and Wireless
LP2966IMM-3325 ,Dual 150mA Ultra Low-Dropout RegulatorApplications0.9 mV at 1mA load current and 135mV at 150mA load cur-n Palmtop/Laptop Computerrent.n ..
LM4670ITLX/NOPB-LM4670SD/NOPB
Filterless High Efficiency 3W Switching Audio Amplifier 9-DSBGA -40 to 85
LM4670
www.ti.com SNAS240C –DECEMBER 2004–REVISED MAY 2013
LM4670 Boomer™ Audio Power Amplifier Series Filterless High Efficiency 3W Switching
Audio Amplifier
Checkfor Samples: LM4670
1FEATURES DESCRIPTIONThe LM4670isa fully integrated single-supply high
23• No Output Filter Required for Inductive Loads efficiency switching audio amplifier.It features an
• Externally Configurable Gain innovative modulator that eliminates the LC output
Very Fast Turn on Time: 1.35ms (Typ) filter used with typical switching amplifiers.
Eliminating the output filter reduces external
• Minimum External Components component count, simplifies circuit design, and
• "Click and Pop" Suppression Circuitry reduces board area. The LM4670 processes analog
• Micro-Power Shutdown Mode inputs witha delta-sigma modulation technique that
lowers output noise and THD when compared to
• Short Circuit Protection conventional pulse width modulators.
• Availablein Space-Saving DSBGA and WSON
Packages The LM4670is designedto meet the demandsof
mobile phones and other portable communication
devices. Operating ona single 5V supply,it is
APPLICATIONS capableof drivinga 4Ω speaker loadata continuous
• Mobile Phones average outputof 2.3W with less than 1% THD+N.Its
PDAs flexible power supply requirements allow operation
from 2.4Vto 5.5V.
• Portable Electronic DevicesThe LM4670 has high efficiency with speaker loads
KEY SPECIFICATIONS comparedtoa typical Class AB amplifier. Witha 3.6V
supply drivingan 8Ω speaker, the IC's efficiency fora
• Efficiencyat 3.6V, 100mW into 8Ω Speaker, 100mW power levelis 77%, reaching 88%at 600mW
77% (Typ) output power.
• Efficiencyat 3.6V, 600mW into 8Ω Speaker, The LM4670 featuresa low-power consumption
88% (Typ) shutdown mode. Shutdown may be enabled by
• Efficiencyat 5V, 1W into 8Ω Speaker, 87% driving the Shutdown pintoa logic low (GND).
(Typ) The gain of the LM4670is externally configurable
• Quiescent Current, 3.6V Supply, 4.8mA (Typ) which allows independent gain control from multiple
• Total Shutdown Power Supply Current, 0.01µA sourcesby summing the signals.
5.5V
