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Partno	Mfg	Dc	Qty	Available	Descript
LM4990ITLX/NOPB |LM4990ITLXNOPB	NATIONAL	N/a	3000	avai	2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level 9-DSBGA

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LM4990ITLX/NOPB
2 Watt Audio Power Amplifier with Selectable Shutdown Logic Level 9-DSBGA
LM4990
www.ti.com SNAS184E –DECEMBER 2002–REVISED MAY 2013
LM4990 2 Watt Audio Power Amplifier with Selectable
Shutdown Logic Level
Checkfor Samples: LM4990
1FEATURES DESCRIPTION
The LM4990is an audio power amplifier primarily Availablein Space-Saving Packages: WSON, designed for demanding applications in mobileExposed-DAP MSOP-PowerPAD, VSSOP, and phones and other portable communication deviceDSBGA applications.Itis capableof delivering 1.25 wattsof• Ultra Low Current Shutdown Mode continuous average powerto an 8Ω BTL load and2
wattsof continuous average power (NGZ and DGQ• Improved Click and Pop Circuitry Eliminates
only)toa 4Ω BTL load with less than 1% distortionNoise During Turn-On and Turn-Off (THD+N+N) froma 5VDC power supply.Transitions 2.2- 5.5V Operation Boomer audio power amplifiers were designed
specificallyto provide high quality output power witha• No Output Coupling Capacitors, Snubber minimal amount of external components. TheNetworksor Bootstrap Capacitors Required LM4990 does not require output coupling capacitors• Unity-Gain Stable or bootstrap capacitors, and thereforeis ideally suited
for mobile phone and other low voltage applications• External Gain Configuration Capability
where minimal power consumption isa primary• User Selectable Shutdown Highor Low Logic requirement.Level
The LM4990 featuresa low-power consumption
shutdown mode. To facilitate this, Shutdown may beAPPLICATIONS
enabled by either logic high or low depending on• Mobile Phones mode selection. Driving the shutdown mode pin either PDAs highor low enables the shutdown pintobe drivenin likewise mannerto enable shutdown.• Portable Electronic Devices
The LM4990 contains advanced pop& click circuitryKEY SPECIFICATIONS which eliminates noise which would otherwise occur
during turn-on and turn-off transitions.• Improved PSRRat 217Hz& 1KHz: 62dB
The LM4990 is unity-gain stable and can be• Power Outputat 5.0V, 1% THD+N,
configuredby external gain-setting resistors.– 4Ω (NGZ and DGQ only): 2W (Typ) 1% THD+N, 8Ω: 1.25W 4Ω: 600mW