LM4995_15 Datasheet, PDF (1/22 Pages) Texas Instruments – 1.3 W Audio Power Amplifier

LM4995, LM4995TMBD
www.ti.com
SNAS329G – APRIL 2006 – REVISED APRIL 2013
LM4995
1.3 W Audio Power Amplifier
Check for Samples: LM4995, LM4995TMBD
FEATURES
1
•2 Available in Space-Saving 0.4mm Pitch
DSBGA Package
• Ultra Low Current Shutdown Mode
• BTL Output Can Drive Capacitive Loads
• Improved Click and Pop Circuitry Eliminates
Noise during Turn-On and Turn-Off Transitions
• 2.4 - 5.5V Operation
• No Output Coupling Capacitors, Snubber
Networks or Bootstrap Capacitors Required
• Unity-Gain Stable
• External Gain Configuration Capability
• WSON Package: 0.5mm Pitch, 3 x 3 mm
APPLICATIONS
• Mobile Phones
• PDAs
• Portable electronic devices
KEY SPECIFICATIONS
• PSRR at 3.6V (217Hz & 1kHz): 75 dB
• Output Power at 5.0V, 1% THD+N, 8Ω:
1.3 W (typ)
• Output Power at 3.6V, 1% THD+N, 8Ω:
625 mW (typ)
• Shutdown Current: 0.01µA (typ)
DESCRIPTION
The LM4995 is an audio power amplifier primarily
designed for demanding applications in mobile
phones and other portable communication device
applications. It is capable of delivering 1.2W of
continuous average power to an 8Ω BTL load with
less than 1% distortion (THD+N) from a 5V_DC power
supply.
Boomer audio power amplifiers were designed
specifically to provide high quality output power with a
minimal amount of external components. The
LM4995 does not require output coupling capacitors
or bootstrap capacitors, and therefore is ideally suited
for mobile phone and other low voltage applications
where minimal power consumption is a primary
requirement.
The LM4995 features a low-power consumption
shutdown mode, which is achieved by driving the
shutdown pin with logic low. Additionally, the LM4995
features an internal thermal shutdown protection
mechanism.
The LM4995 contains advanced click and pop
circuitry which eliminates noise which would
otherwise occur during turn-on and turn-off
transitions.
The LM4995 is unity-gain stable and can be
configured by external gain-setting resistors.
1
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2
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
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