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PDF PA4894 Data sheet ( Hoja de datos )
| Número de pieza | PA4894 | |
| Descripción | 1.8 WATT DIFFERENTIAL AUDIO POWER AMPLIFIER | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de PA4894 (archivo pdf) en la parte inferior de esta página. Total 11 Páginas | ||
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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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PA4894
TYPICAL APPLICATION CIRCUIT
Differential Input
Negative Diff
Input from DAC
CI1 RIN1
390nF 20kΩ
INM
RF1
20kΩ
VP
VP
CS
1µF
OUTA
SHUTDOWN CONTROL
SD MODE SD SELECT
STATUS
0 0 SHUTDOWN
0 1 ON
1 0 ON
1 1 SHUTDOWN
Positive Diff
CI2 RIN2
Input from DAC
390nF 20kΩ
BYPASS
Cb
1µF
SD SELECT
SHUTDOWN
CONTROL
SD MODE
INP
VM
OUTB
Driving Headphone
20kΩ
RF2
CMOS IC
RL
8Ω
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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PA4894
TYPICAL CHARACTERISTICS(Cont.)
CMOS IC
UTC assumes no responsibility for equipment failures that result from using products at values that
exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges, or
other parameters) listed in products specifications of any and all UTC products described or contained
herein. UTC products are not designed for use in life support appliances, devices or systems where
malfunction of these products can be reasonably expected to result in personal injury. Reproduction in
whole or in part is prohibited without the prior written consent of the copyright owner. The information
presented in this document does not form part of any quotation or contract, is believed to be accurate
and reliable and may be changed without notice.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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11 Page | ||
| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet PA4894.PDF ] | |
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