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IT4992 －
2.3-Watt Low Noise Stereo Audio Power Amplifier
Description
The IT4992 is a dual bridge-connected audio power amplifiers, capable
of delivering 1.35W of continuous average power to an 8 BTL with less
than 1% distortion (THD+N) from a 5.0V power supply, and 320mW to an 8
BTL load from a 2.6V power supply. For the low current consumption
applications, the SHDNB mode is supported to disable the IT4992 when it
is idle. The current consumption can be further reduced to below 0.1uA.
The IT4992 contains over temperature
protection, preventing IT4992 from damages of temperature. For maximum
flexibility, the IT4992 provides an externally controlled gain (with
resistors), as well as an externally controlled turnon time (with the
bypass capacitor). The IT4992 is available in a 3mm×3mm QFN-16 package.
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Features
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2.3V-5.5V
operation range
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Output
power
2.3 W into
4Ω at 5V Supply at THD=10% (Typ.)
1.35 W into
8Ω at 5V Supply at THD=1% (Typ.)
450 mW into
8Ω at 3V Supply at THD=1% (Typ.)
320 mW into
8Ω at 2.6V Supply at THD=1% (Typ.)
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Low
quiescent current
7mA Typical
at VDD=5V
Shutdown
current < 0.1uA
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High
signaltonoise ratio performance
Po=1W,
f=1KHz, SNR=101 dB (Aweighting) at VDD=5V
- Ultra low noise (12u Vrms, Aweighting)
and output offset voltage
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Thermal
shutdown protection
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No output
coupling capacitors, snubber networks or bootstrap capacitors required
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Unity-gain
stable
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External
gain configuration capability
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Technology
Information:
 Data Sheet
Package:
QFN-16
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