LM4995_14 Datasheet, PDF (1/23 Pages) Texas Instruments – 1.3 W Audio Power Amplifier

LM4995, LM4995TMBD
www.ti.com
SNAS329F – APRIL 2006 – REVISED NOVEMBER 2009
LM4995
1.3 W Audio Power Amplifier
Check for Samples: LM4995, LM4995TMBD
FEATURES
1
•2 Available in space-saving 0.4mm pitch μSMD
package
• Ultra low current shutdown mode
• BTL output can drive capacitive loads
• Improved pop & click 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
• LLP package: 0.5mm pitch, 3 x 3 mm
APPLICATIONS
• Mobile Phones
• PDAs
• Portable electronic devices
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 pop & click 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.
■ PSRR at 3.6V (217Hz & 1kHz)
■ Output Power at 5.0V, 1% THD+N, 8Ω
■ Output Power at 3.6V, 1% THD+N, 8Ω
■ Shutdown Current
Table 1. Key Specifications
VALUE
75
1.3
625
0.01µA (typ)
UNIT
dB
W (typ)
mW (typ)
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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