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PDF PA3427 Data sheet ( Hoja de datos )

Número de pieza PA3427
Descripción 2W STEREO AUDIO AMPLIFIER
Fabricantes Unisonic Technologies 
Logotipo Unisonic Technologies Logotipo



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No Preview Available ! PA3427 Hoja de datos, Descripción, Manual

UNISONIC TECHNOLOGIES CO., LTD
PA3427
Preliminary
2W STEREO AUDIO AMPLIFIER
CMOS IC
DESCRIPTION
The UTC PA3427 is a stereo audio speaker operated on a single
5V supply. It is capable of delivering 2W of output power per channel
in Bridge-Tied Load mode into 4load with less than 1% THD+N.
Two terminals (GAIN0 and GAIN1) can configure and control the
amplifier gain. In order to simplify the design of audio system in the
notebook application, the two modes of Bridge-Tied Load (BTL) and
Single-End (SE) mode drive the speakers and headphone
respectively. The UTC PA3427 supports two input paths to choose
two different amplitude AC signals through setting HP/ LINE pin.
The UTC PA3427 is suitable for applications, such as stereo
power amplifiers of notebooks or desktop computers, and multimedia
monitors.
FEATURES
* Depop circuitry integrated
* BTL gain: 6dB, 10dB, 15.6dB, 21.6dB
* SE gain: 4.1dB
* Output power (THD+N:1%, supply voltage:5V)
2.0W into a 4load
1.2W into a 8load
* With two mode :BTL and SE
* Stereo input multiplexer
* Fully differential input
* Build-in gain control
* PC-Beep input function
* Thermal shutdown protection
ORDERING INFORMATION
Ordering Number
PA3427G-N24-R
Package
HTSSOP-24
Packing
Tape Reel
PA3427G-N24-R
MARKING
(1)Packing Type
(2)Package Type
(3)Green Package
(1) R: Tape Reel
(2) N24: HTSSOP-24
(3) G: Halogen Free and Lead Free
www.unisonic.com.tw
Copyright © 2015 Unisonic Technologies Co., Ltd
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PA3427 pdf
PA3427
Preliminary
TYPICAL APPLICATION CIRCUIT
CMOS IC
Right Linein Negative
Differential Input
Right Hpin Negative
Differential Input
1µF
23 RLINEIN
20 RHPIN
Right
MUX
1µF
Right Hpin/Linein Positive
Differential Input
1µF
8 RIN
PC-BEEP Input Signal
2.2µF
14 PC-Beep
1µF
11 BYPASS
2 GAIN0
3 GAIN1
15 SE/BTL
17 HP/LINE
Gain/
MUX
Control
Left Hpin/Linein Positive
Differential Input
10 LIN
1µF
Left Linein Negative
Differential Input
Left Hpin Negative
Differential Input
1µF
5 LLINEIN
6 LHPIN
1µF
Left
MUX
-
+
-
+
PC-Beep
Depop
Circuitry
Power
Management
-
+
-
+
ROUT+ 21
ROUT- 16
PVDD 7.18
VDD 19
220µF
1K
VDD
100K
SHUTDOWN 22
GND 1, 12, 13, 24
1µF
10µF
LOUT+ 4
1K
220µF
100K
LOUT- 3
0.1µF
Application Circuit Using Differential Inputs
Note: 1µF ceramic capacitor must be placed much closely to the IC. For filtering lower frequency noise signals, a
larger electrolytic capacitor of 10µF or greater should be placed as close as possible to the audio power
amplifier.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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