|
|
|
부품번호 | PAM8202 기능 |
|
|
기능 | Tiny Package 2 Watt Class-D Stereo Audio Amplifier | ||
제조업체 | PAM | ||
로고 | |||
www.DataSheet4U.com
PAM8202
Tiny Package 2 Watt Class-D Stereo Audio Amplifier
DESCRIPTION
The PAM8202 is a 2 Watt per channel, 8-pin, stereo
class D audio amplifier, which offers low THD+N
(0.10%), allowing it to produce high-quality sound
reproduction.
The PAM8202 runs off of a 5 Volt supply at much
higher efficiencies than their class AB cousins,
making it ideal for many portable applications.
The PAM8202 only requires very few external
components (as few as three tiny capacitors),
results in significant cost and board space savings.
The PAM8202 is available in a SOP8 package.
TYPICAL APPLICATION CIRCUIT
FEATURES
2 Watts @ 10% THD per channel output into
a 4 Ohm load at 5V
Support speakers or earphone (4 to 32 ).
Superior low noise without input.
Supply voltage from 2.5V to 5.5 V.
85% efficiency above.
Short Circuit Protection.
Less output capacitor and inductor to save
the space and cost.
Low THD+N
Low quiescent current < 10 mA
APPLICATIONS
Notebook Computers.
PDAs/GPS Navigator/e-Dictionary
Portable DVD Players, Game Machines.
Cellular Phones,VoIP Phones,Screen Phones
MP3 or PMP Players.
Portable Speaker Systme,Portable Amplifier
LCD monitor / TV.
Bluetooth Car-Kit
R
Input
0.47 F 10K
Input
L
0.47 F 10K
Vdd
IN_R
IN_L
VDD -OUT_R
+OUT_R
+OUT_L
GND -OUT_L
33 H
0.47 F
33 H
33 H
0.47 F
0.47 F
33 H
0.47 F
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PRELIMIARY DATASHEET
Speaker
Speaker
PAM8202 Rev. 1.1
1
www.DataSheet4U.com
PAM8202
Tiny Package 2 Watt Class-D Stereo Audio Amplifier
(%)
100
50
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
Ap
(W)
(%)
100
50
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
Ap
(W)
THD+N vs. Output Power
8 , 1kHz, VDD = 5V
(%)
100
50 Ap
100%
THD+N vs. Output Power
4 , 1kHz, VDD = 5V
Efficiency VS Output Power
20
10
5
2
1
0.5
0.2
0.1
0.05
0.02
0.01
20
50 100 200 500 1k 2k 5k 10k
THD+N vs. Frequency
8 , 500mW output, VDD = 5V
(Hz)
20k
80%
60%
40%
20%
0%0 1 2 3
Power
Power Dissipation vs. Output Power
4 , 1kHz, VDD = 5V
1.4
1.2
1.0
0.8
0.6
0.4
0.2
0.0
0
0.5
1 1.5 2
Output Power -W
Power Dissipation vs. Output Power
8 , 1kHz, VDD = 5V
(dBr)
+0
-10
-20
-30
-40
-50
-60
-70
-80
-90
-100
-110
-120
-130
-140
-150
20
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PRELIMIARY DATASHEET
50 100 200 500 1k 2k 5k
FFT Noise Floor
(16k FFT)
(Hz)
10k 20k
PAM8202 Rev. 1.1
4
4페이지 www.DataSheet4U.com
PAM8202
Tiny Package 2 Watt Class-D Stereo Audio Amplifier
FCL = 1/ [2 X Cin X (Rin + 10k)]
FCL is the lower corner on frequency response curve.
Cin is very important consider to the lower frequency performance. The Cin should not be too large with small
speakers as the load, because such small speakers usually can not response with lower frequency, delivering too
much low frequency energy into a small speaker which usually got resonant frequency (Fs) around 150Hz is
meaningless and dangerous. This will easily over drive the small speakers. The movement of speaker cone will be
too much under such condition and this also creates unnecessary distortion on mid-to high frequency range
because the speaker is now operating in non-linear area. Speakers can only generate heat but not low frequency
sound when it is over driven, the will cause speaker or amplifier failure in some cases.
Cin should have 10% tolerance or less because the tolerance can cause the input impedance mismatch at FCL
and below.
Output filter
The L and C on each output node of PAM8202 form the low-pass-filter (LPF), the higher corner frequency (FCH) is
determine by equation below.
FCH = 1/ [2 X sqr (L X C)]
FCH is the higher corner on frequency response curve.
Important Notice
The L-C filters (-12dB/Oct) gives twice much attenuation and lower impedance (means lower insertion loss)
compare to those R-C filters (-6dB), but remember, the FCH above is also the resonant frequency of this LC
network. The quality factor (Q) of this resonant network can be very high, depended on the Q of L and C. The high
resonant Q which is usually caused by open-load can generate a very high voltage on speaker terminal, and the
impedance of the L-C network can be very low, thus induces large amount of current flows from output stage of
PAM8202. This always causes part failure. So Do Not test open-load on any class D amplifier with output filters.
LC filter calculator with output load impedance and cut-off frequency
11
f = 2 LC , XL= 2 fL , XC= 2 fC
Power Analog Microelectronics, Inc.
CONFIDENTIAL. DO NOT DISTRIBUTE OR REPRODUCE WITHOUT PERMISSION FROM P.A.M.
PRELIMIARY DATASHEET
PAM8202 Rev. 1.1
7
7페이지 | |||
구 성 | 총 8 페이지수 | ||
다운로드 | [ PAM8202.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
PAM8201 | (PAM8101 / PAM8201) Tiny 1.2 Watt Class-D Audio Amplifiers | PAM |
PAM8202 | Tiny Package 2 Watt Class-D Stereo Audio Amplifier | PAM |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |