PA4894 Datasheet, PDF (1/11 Pages) Unisonic Technologies – 1.8 WATT DIFFERENTIAL AUDIO POWER AMPLIFIER WITH SELECTABLE SHUTDOWN

UNISONIC TECHNOLOGIES CO., LTD
PA4894
1.8 WATT DIFFERENTIAL
AUDIO POWER AMPLIFIER
WITH SELECTABLE
SHUTDOWN
CMOS IC
„ DESCRIPTION
The UTC PA4894 is a differential audio power amplifier,
characterized by its selectable shutdown mode for flexible operation.
Shutdown may be enabled by either logic high or low depending on
the voltage applied on the SD MODE pin and the shutdown mode
features low power consumption.
This device provides customers perfect sound performance by
its high quality audio, moreover, less external components and lower
power dissipation are required.
Operating with a 5.5V power supply, the UTC PA4894 is
capable of driving an 8.0Ω load at a continuous average output of
1.8W under a 10% THD+N. If it works with a 5.0V voltage under the
same load conditions, 1.0W power will be delivered and the
distortion will be less than 0.01%.
The UTC PA4894 incorporates protection circuit to avoid the
click and pop noise, which may occur during the transition state
between turn-on and turn-off.
The UTC PA4894 can be directly connected to a battery without
an LDO since it has perfect PSRR. The UTC PA4894 can be
configured externally with resistors to provide a controlled gain and
with bypass capacitor to provide a controlled turn-on time for more
flexibility.
The UTC PA4894 is suitable for applications, such as portable
electronic devices, PDAs and mobile phones.
„ ORDERING INFORMATION
Ordering Number
PA4894G-SM2-R
Package
MSOP-10
MSOP-10
„ FEATURES
* Differential amplification
* Selectable and low current shutdown
mode
* 1.0W/Ch(typ.)into a 8Ω load @5.0V
* Directly connected to the battery due to
excellent PSRR
* Operation supply: 2.2 V-5.5 V
* External controlled gain and turn-on
time configuration
* Circuits for protection
* Thermal overload protection circuit
* “Click and pop” noise protection circuit
* Halogen Free
Packing
Tape Reel
www.unisonic.com.tw
Copyright © 2009 Unisonic Technologies Co., Ltd
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