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PDF PA4863 Data sheet ( Hoja de datos )
| Número de pieza | PA4863 | |
| Descripción | DUAL 2.2W AUDIO AMPLIFIER PLUS STEREO HEADPHONE FUNCTION | |
| Fabricantes | Unisonic Technologies | |
| Logotipo |  |
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UNISONIC TECHNOLOGIES CO., LTD
PA4863
DUAL 2.2W AUDIO AMPLIFIER
PLUS STEREO HEADPHONE
FUNCTION
DESCRIPTION
The UTC PA4863 is a dual bridge-connected audio power
amplifier. It combines dual bridge speaker amplifiers and stereo
headphone amplifiers on one chip to simplify audio system design.
In addition, the headphone input pin allows the amplifiers to
operate in single-ended mode when driving stereo headphones.
The IC could deliver different power by packages as below (when
connected to a 5V supply with less than 1.0% THD+N.):
- HTSSOP-20, 4Ω load: 2.2W
- HTSSOP-20, 3Ω load: 2.5W(with forced-air cooled)
- SOP/DIP , 8Ω load: 1.1W.
The UTC PA4863 features an externally controlled, low-power
consumption shutdown mode, a stereo headphone amplifier mode,
and thermal shutdown protection. It also utilizes circuitry to reduce
“clicks and pops” during device turn-on.
FEATURES
* “Click and pop” suppression circuitry
* Thermal shutdown protection circuitry
* Unity-gain stable
* Stereo headphone amplifier mode
ORDERING INFORMATION
Ordering Number
Lead Free
Halogen Free
PA4863L-D16-T
PA4863G-D16-T
PA4863L-S16-R
PA4863G-S16-R
PA4863L-S18-R
PA4863G-S18-R
PA4863L-N20-R
PA4863G-N20-R
PA4863L-N20-T
PA4863G-N20-T
Package
DIP-16
SOP-16
SOP-18
HTSSOP-20
HTSSOP-20
Packing
Tube
Tape Reel
Tape Reel
Tape Reel
Tube
CMOS IC
www.unisonic.com.tw
Copyright © 2010 Unisonic Technologies Co., Ltd
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PA4863
CMOS IC
TYPICAL APPLICATION CIRCUIT
Audio
Input
CI RF
1μF 20KΩ 6
RI 8
20KΩ
VDD
+
CS
0.1µF
4,13 TANT
- IN A
+IN A
+-AMP 1A
20KΩ
50KΩ
CB 10 Bypass VDD/2
Audio
Input
CI
1μF
(CB size)
0.33μF
RI
20KΩ
VDD
RF
11 -IN B
9 +IN B
50KΩ
+-AMP 1B
20KΩ
20KΩ
100kΩ
To Control Pin on
Headphone jack 100KΩ
1
16
Shutdown
HP-IN
CO
-OUT A 5
20KΩ
100µF
+
RL 1kΩ
CONTROL PIN
RING
+-AMP202AK+OΩUT
3
A
8Ω
To HP-IN Circuit
CO
-OUT B 12
100µF
+
TIP SLEEVE
HEADPHONE JACK
20KΩ
20KΩ
+-AMP
2B
+OUT
B
14
RL
8Ω
1kΩ
GND 2,7,15
Note: Pin out shown for DIP-16. Refer to the PIN CONFIGURATION for the pin out of other packages.
Figure 1.Typical Audio Amplifier Application Circuit
EXTERNAL COMPONENTS DESCRIPTION
Components
RI
CI
RF
CS
CB
Functional Description
The inverting input resistance, along with RF, set the closed-loop gain. RI, along with CI form a high
pass filter with fc=1/(2πRICI)
The input coupling capacitor blocks DC voltage at the amplifier’s input terminals. CI, along with RI,
create a high pass filter with fc=1/(2πRICI). Refer to the section. Selecting Proper External
Components, for an explanation of determine the value of CI.
The feedback resistance, along with RI, set the closed-Ioop gain.
The supply bypass capacitor. Refer to the Power Supply Bypassing section for information about
properly placing and selecting the value of, this capacitor.
The capacitor, CB, filters the half-supply voltage present on the Bypass pin. Refer to the Selecting
Proper External Components section for information concerning proper placement and selecting
CB’S value.
UNISONIC TECHNOLOGIES CO., LTD
www.unisonic.com.tw
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PA4863
TYPICAL CHARACTERISTICS(Cont.)
Supply Current vs Supply Voltage
15
VIN=0V
No Load
12 BRIDGED
(HP-IN=GND)
9
6
3 SINGLE-ENDED
(HP-IN=VDD)
0 2 2.5 3 3.5 4 4.5 5 5.5
Supply Voltage (V)
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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| Páginas | Total 11 Páginas | |
| PDF Descargar | [ Datasheet PA4863.PDF ] | |
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