请登录

免费注册
全部商品
电子元器件
方案中心
工业品
PDF资料
购物车 0
上传BOM

产品分类

找货询价

一对一服务 找料无忧

专属客服

服务时间

周一 - 周六 9:00-18:00

QQ咨询

一对一服务 找料无忧

专属客服

服务时间

周一 - 周六 9:00-18:00

会员中心
购物车
技术支持

一对一服务 找料无忧

专属客服

服务时间

周一 - 周六 9:00-18:00

售后咨询

一对一服务 找料无忧

专属客服

服务时间

周一 - 周六 9:00-18:00

LY8212EL

型号：

LY8212EL

品牌：

LYONTEK[ Lyontek Inc. ]

页数：

17 页

PDF大小：

843 K

下载PDF手册
®
LY8212  
Rev. 1.5  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
„
FEATURES  
„
GENERAL DESCRIPTION  
„ 3.3W/CH Into 4Ω from 5.5V power supply at  
THD+N = 10%.  
„ 2.2V~5.5V Power supply.  
„ Low shutdown Current.  
„ Low Quiescent Current.  
„ Minimum external components.  
„ No output filter required for inductive loads.  
„ Short-Circuit Protection and automatic recovery.  
„ Over-Heat Protection and automatic recovery.  
„ Low noise during turn-on and turn-off transitions.  
„ FM enhancement function.  
„ Lead free and green package available.  
(RoHS Compliant)  
„ Package : 16pin 150mil SOP, 16pin 4x4 QFN.  
The LY8212 is a high efficiency, high quality 3.3W  
stereo class D audio power amplifier which can  
operate FM enhance function to get good  
performance in FM mode. It is a low noise, filterless  
PWM architecture eliminates the output filter,  
reducing external component count, system cost  
(BOM cost), and simplify design.  
The device was designed to meet of Multimedia  
application includes mini speaker and other portable  
electronic devices.  
The LY8212 is a single 5.5V power supply, it is  
capable of driving 4Ω speaker load at a continuous  
average output of 3.3W/CH with 10% THD+N.  
The device also features an internal thermal  
shutdown protection and output pin short circuit  
( short to output pin, short to ground and short to  
VDD ) protection prevent the device from damage  
during fault conditions.  
„
APPLICATION  
„ Portable electronic devices  
„ Mobile phones, PDAs  
The LY8212 is easily to be used in various portable  
applications and products. such as FM speaker,  
MP3, MP4 and MP5 media players.  
„ DVD/CD Players, TFT LCD TVs/Monitors  
„ USB Audio, Audio System  
„ iPod dock.  
„
PIN CONFIGURATION  
LY8212 SOP16 Pin Configuration (Top View)  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
1
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
LY8212 QFN16 Pin Configuration (Top View)  
„
PIN DESCRIPTION  
Pin No.  
SYMBOL  
DESCRIPTION  
SOP16  
QFN16  
Vo-(L)  
GND  
1
2/9/15  
3
15  
Negative(-) BTL output of left channel.  
Ground  
7/13/16  
Vo+(L)  
VDD  
1
2/11  
3
Positive(+) BTL output of left channel.  
Power supply of left and right channel.  
Shutdown control pin. (when LOW level is shutdown mode).  
Analog GND of left and right channel.  
Input of left channel.  
4/13  
5
Shutdown  
AGND  
INL  
6
4
7
5
Bypass  
INR  
8
6
Bypass pin.  
10  
11  
12  
14  
16  
8
Input of right channel.  
AVDD  
9
Analog Power supply of left and right channel.  
FM enhance pin. (when HIGH level is FM enhance mode).  
Positive(+) BTL output of right channel.  
Negative(-) BTL output of right channel.  
FM Enhance  
Vo+(R)  
Vo-(R)  
10  
12  
14  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
2
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
ORDERING INFORMATION  
Feature  
Speaker  
Channels Package  
Pin/  
Output Power  
(THD+N=10%)  
Input Output  
Ordering Code  
Type  
Type  
FM Enhance  
3.3W/4Ω @5.5V_BTL  
2.7W/4Ω @5.0V_BTL  
2.0W/8Ω @5.5V_BTL  
1.6W/8Ω @5.0V_BTL  
LY8212SL  
LY8212EL  
Stereo  
Stereo  
SOP16  
QFN16  
SE  
BTL  
Yes  
Yes  
3.3W/4Ω @5.5V_BTL  
2.7W/4Ω @5.0V_BTL  
2.0W/8Ω @5.5V_BTL  
1.6W/8Ω @5.0V_BTL  
SE  
BTL  
„
TYPICAL APPLICATION CIRCUIT  
Figure 1. LY8212SL Typical Application Circuit  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
3
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
„
ABSOLUTE MAXIMUM RATINGS  
PARAMETER  
SYMBOL  
VDD  
RATING  
6.0  
UNIT  
V
Power supply voltage range  
Operating temperature  
Input voltage range  
℃
TA  
-40 to 85 (I grade)  
-0.3V to VDD +0.3V  
-65 to 150  
Internally Limited  
2000  
VI  
V
℃
Storage temperature  
TSTG  
PD  
Power dissipation  
W
V
℃
℃
ESD susceptibility  
VESD  
TJMAX  
TSOLDER  
Junction temperature  
Soldering temperature (under 10 sec)  
150  
260  
„
ELECTRICAL CHARACTERISTICS (TA = 25℃)  
PARAMETER  
TYP. *2  
SYMBOL  
TEST CONDITION  
MIN.  
MAX. UNIT  
Power supply voltage  
-
2.2  
-
11  
9
5.5  
V
VDD  
VDD = 5.5V, No Load  
VDD = 3.7V, No Load  
VDD = 2.5V, No Load  
-
-
-
-
-
-
Quiescent current  
(FM enhance pin=low)  
IQ  
mA  
7
≦
VSHUTDOWN  
V
-
0.8V,  
Shutdown current  
ISD  
-
0.1  
-
A
µ
DD = 2.5V to 5.5V  
Shutdown voltage input high  
Shutdown voltage input low  
1.2  
-
-
-
-
VSDIH  
VSDIL  
V
-
0.4  
VI = 0 V, Av = 2 V/V,  
DD = 2.5 V to 5.5 V  
Shutdown temp.  
Restore temp.  
Output offset voltage  
-
-
25  
mV  
VOS  
TSD  
V
-
-
180  
135  
-
-
Thermal shutdown temperature  
℃
„
OPERATING CHARACTERISTICS (1) (TA = 25℃)  
PARAMETER  
TYP. *2  
SYMBOL  
TEST CONDITION  
MIN.  
MAX. UNIT  
-
-
-
3.3  
2.7  
1.4  
2.6  
1.7  
-
-
-
VDD=5.5V  
THD+N=10%  
VDD=5.0V  
VDD=3.7V  
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
RL = 4Ω,  
f = 1kHz,  
-
-
-
-
THD+N=1%  
1.2*1  
2.0  
1.6  
0.8  
1.6  
1.3  
0.6  
Output power / channel  
PO  
W
VDD=5.5V  
-
-
-
-
THD+N=10% VDD=5.0V  
VDD=3.7V  
RL = 8Ω,  
f = 1kHz,  
VDD=5.5V  
THD+N=1%  
-
-
-
-
VDD=5.0V  
VDD=3.7V  
(*1)RL = 4Ω,f = 1kHz, VDD=3.7V, Output Power=1.2W@ THD+N=2%  
(*2)Typical values are included for reference only and are not guaranteed or tested.  
Typical values are measured at VCC = VCC(TYP.) and TA = 25℃  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
4
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
„
OPERATING CHARACTERISTICS (2) (TA = 25℃)  
TYP. *2  
SYMBOL  
TEST CONDITION  
Av=10 V/V ,Input=GND  
MIN.  
MAX. UNIT  
PARAMETER  
-
-62.4  
-
f=1KHz  
Power supply rejection ratio  
PSRR Ri=33K, Ci=0.47μF  
dB  
f=217Hz  
RL=4Ohm, VDD=5.0V  
-
-62  
-
LÆR  
RÆL  
-
-
85.4  
77.6  
-
RL = 4Ω,f=1kHz,  
Cs  
Crosstalk  
dB  
0.25W=0dB, VDD=5.0V  
RL = 8Ω,Av=2 V/V,  
1.0W=0dB  
VDD = 5.0V, RL = 8Ω,  
Av=2 V/V, Inputs=GND,  
f = 20Hz to 20kHz,  
Signal-to-noise ratio  
SNR  
-
86.8  
-
-
dB  
uV  
VDD=5.0V  
No  
Output voltage noise  
Vn  
-
128.7  
weighting  
Cbypass = 4.7μF  
Cbypass = 2.2μF  
Cbypass = 1.0μF  
Cbypass =0.47μF  
Cbypass = 0.22μF  
Cbypass =0.1μF  
Cbypass =None  
Cbypass = 4.7μF  
Cbypass = 2.2μF  
Cbypass = 1.0μF  
Cbypass =0.47μF  
Cbypass = 0.22μF  
Cbypass =0.1μF  
Cbypass =None  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
300  
156  
138  
72  
40  
32  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
VDD = 5.0V  
22  
Start-up time from shutdown  
ZI  
ms  
236  
140  
128  
63  
36  
28  
VDD = 3.7V  
22  
245  
kHz  
%
V/V  
Frequency  
Efficiency  
Fc  
η
Gv  
VDD=2.5V~5.5V  
f=1kHz, RL=8Ω, Output=1.4W  
VDD= 2.5V to 5.5V  
-
88  
Total Gain *3  
[150KΩ / (5KΩ+Ri)] x4  
(*2)Typical values are included for reference only and are not guaranteed or tested.  
Typical values are measured at VCC = VCC(TYP.) and TA = 25℃  
(*3)The audio amplifier’s gain is determined by：  
Pre-Amplifier Gain = [150KΩ / ( 5KΩ + Ri )] x 2  
Total Gain = {[150KΩ / ( 5KΩ + Ri )] x 2} x 2  
where Ri is the external serial resistance at the input pin.  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
5
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
TYPICAL PERFORMANCE CHARACTERISTICS  
Figure 2  
Total Harmonic Distortion + Noise vs Output Power (4Ω)  
Figure 3  
Total Harmonic Distortion + Noise vs Output Power (8Ω)  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
6
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
Figure 4  
SNR vs. Noise Level  
Figure 5  
Crosstalk  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
7
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
Quiescent Current vs. Supply Voltage  
QUIECENT CURRENT vs SUPPLY VOLTAGE  
FM Enhance=Enable  
QUIESCENT CURRENT vs SUPPLY VOLTAGE  
FM Enhance=Disable  
20  
18  
16  
14  
12  
10  
8
20  
18  
16  
14  
12  
10  
8
No Load  
4Ω, 2ch  
8Ω, 2ch  
No Load  
4Ω, 2CH  
8Ω, 2CH  
6
6
4
4
2.5  
3
3.5  
4
4.5  
5
5.5  
2.5  
3
3.5  
4
4.5  
5
5.5  
VDD - Supply Voltage - V  
VDD - Supply Voltage - V  
SD Current vs. SD Voltage  
SHUTDOWN CURRENT vs SHUTDOWN VOLTAGE  
FM Enhance=Enable  
SHUTDOWN CURRENT vs SHUTDOWN VOLTAGE  
FM Enhance=Disable  
160  
140  
120  
100  
80  
160  
140  
120  
100  
80  
2.5v  
3.7v  
5v  
2.5v  
3.7V  
5v  
60  
60  
40  
40  
20  
20  
0
0
0
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
0.7  
0.8  
0.9  
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
0.7  
0.8  
0.9  
Shutdown Voltage - V  
Shutdown Voltage - V  
Supply Current vs. Output Power (RL=4Ω)  
SUPPLY CURRENT vs OUTPUT POWER  
FM Enhance=Disable  
SUPPLY CURRENT vs OUTPUT POWER  
FM Enhance=Enable  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
2.5V  
3.7V  
5.0V  
2.5V  
3.7V  
5.0V  
1
2
3
4
5
6
7
8
9
10  
1
2
3
4
5
6
7
8
9
10  
Po-Output Power-W (RL=4 Ohm)  
Po-Output Power-W (RL=4 Ohm)  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
8
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
Supply Current vs. Output Power (RL=8Ω)  
SUPPLY CURRENT vs OUTPUT POWER  
FM Enhance=Enable  
SUPPLY CURRENT vs OUTPUT POWER  
FM Enhance=Disable  
500  
450  
400  
350  
300  
250  
200  
150  
100  
50  
500  
450  
400  
350  
300  
250  
200  
150  
100  
50  
2.5V  
3.7V  
5.0V  
2.5V  
3.7V  
5.0V  
0
0
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
1.4  
1.6  
1.8  
2
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
1.4  
1.6  
1.8  
2
Po - Output Power - W (RL=8Ω)  
Po - Output Power - W (RL=8Ω)  
Load Resistance vs. Output Power (THD+N=1%)  
OUTPUT POWER vs LOAD RESISTANCE  
FM Enhance=Enable  
Output Power vs Load Resistance  
FM Enhance=Disable  
2.5  
2
2.5v  
3.7V  
5V  
3
2.5  
2
3.7V  
5V  
5.5V  
5.5V  
1.5  
1
1.5  
1
0.5  
0
0.5  
0
4Ω  
8Ω  
12Ω  
RL - Load Resistance - Ω  
Freq = 1kHz, Gain = 2V/V, THD+N = 1%  
16Ω  
20Ω  
24Ω  
28Ω  
32Ω  
4Ω  
8Ω  
12Ω  
16Ω  
RL - Load Resistance - Ω  
Freq = 1kHz, Gain = 2V/V, THD+N = 1%  
20Ω  
24Ω  
28Ω  
32Ω  
Load Resistance vs. Output Power (THD+N=10%)  
OUTPUT POWER vs LOAD RESISTANCE  
FM Enhance=Disable  
Output Power vs Load Resistor  
FM Enhance=Disable  
3.3  
3
3.5  
3
2.5v  
2.5v  
3.7V  
5V  
3.7V  
5V  
2.7  
2.4  
2.1  
1.8  
1.5  
1.2  
0.9  
0.6  
0.3  
0
5.5V  
5.5V  
2.5  
2
1.5  
1
0.5  
0
4Ω  
8Ω  
12Ω  
16Ω  
20Ω  
24Ω  
28Ω  
32Ω  
4Ω  
8Ω  
12Ω  
16Ω  
RL - Load Resistance - Ω  
Freq = 1kHz, Gain = 2V/V, THD+N = 10%  
20Ω  
24Ω  
28Ω  
32Ω  
RL - Load Resistance - Ω  
Freq = 1kHz, Gain = 2V/V, THD+N = 10%  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
9
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
OUTPUT POWER vs. SUPPLY VOLTAGE (RL=4Ω)  
OUTPUT POWER vs SUPPLY VOLTAGE  
FM Enhance=Enable  
OUTPUT POWER vs SUPPLY VOLTAGE  
FM Enhance=Disable  
4
3.5  
3
4.5  
THD+N=10%  
THD+N=1%  
THD+N=10%  
THD+N=1%  
4
3.5  
3
2.5  
2
2.5  
2
1.5  
1
1.5  
1
0.5  
0
0.5  
0
2.5  
3.7  
5
5.5  
6
2.5  
3.7  
VDD - Supply Voltage - V  
RL=4Ω, f=1K Hz, Gain=2 V/V  
5
5.5  
6
VDD - Supply Voltage - V  
RL=4Ω, f=1K Hz, Gain=2 V/V  
OUTPUT POWER vs. SUPPLY VOLTAGE (RL=8Ω)  
OUTPUT POWER vs SUPPLY VOLTAGE  
FM Enhance=Enable  
OUTPUT POWER vs SUPPLY VOLTAGE  
FM Enhance=Disable  
2.8  
2.4  
2
2.8  
2.4  
2
THD+N=10%  
THD+N=1%  
THD+N=10%  
THD+N=1%  
1.6  
1.2  
0.8  
0.4  
0
1.6  
1.2  
0.8  
0.4  
0
2.5  
3.7  
VDD - Supply Voltage - V  
RL=8Ω, f=1K Hz, Gain=2 V/V  
5
5.5  
6
2.5  
3.7  
VDD - Supply Voltage - V  
RL=8Ω, f=1K Hz, Gain=2 V/V  
5
5.5  
6
Power Dissipation vs. Output Power (8Ohm)  
POWER DISSIPATION vs OUTPUT POWER  
FM Enhance=Disable  
POWER DISSIPATION vs OUTPUT POWER  
FM Enhance=Enable  
1
0.9  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
0
2
1.8  
1.6  
1.4  
1.2  
1
0.8  
0.6  
0.4  
0.2  
0
5V  
5V  
3.7V  
3.7V  
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
1.4  
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
1.4  
Po - Output Power - W  
Po - Output Power - W  
RL=8Ω  
RL=8Ω  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
10  
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
Efficiency vs. Output Power (RL=4Ω,VDD=3.7V)  
Efficiency vs. Output Power (RL=4Ohm,VDD=5V)  
Efficiency vs Output Power(W)  
RL=8 ohm,VDD=3.7V  
Efficiency vs Output Power(W)  
RL=8 ohm,VDD=5V  
90  
80  
70  
60  
50  
40  
90  
80  
70  
60  
50  
40  
30  
30  
FM Enhance=Disable  
FM Enhance=Disable  
20  
20  
FM Enhance=Enable  
10  
FM Enhance=Enable  
10  
0
0
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
1.4  
0
0.1  
0.2  
0.3  
0.4 0.5  
Po-Output Power(W)  
Po-Output Power(W)  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
11  
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
„
APPLICATION INFORMATION  
Input Resistors (Ri) and Gain  
The LY8212 have two internal amplifier stages. The pre-amplifier gain is externally configurable, while the  
total gain is internally fixed. The closed-loop gain of the pre-amplifier gain is set by selecting the Rf to Ri while  
the total gain is fixed at 4x. So the input resistors (Ri) set the gain of the amplifier according to the equation.  
Pre-Amplifier Gain = (Rf / Ri) x 2  
Total Gain = [(Rf / Ri ) x 2] x 2  
AVD = 20 x log [4 x (Rf /Ri )]  
The resistor matching is very important in the amplifiers. Balance of the output on the reference voltage  
depends on matched ratio of the resistors. CMRR, PSRR, and cancellation of the second harmonic distortion  
if resistor mismatch occurs. Therefore, it is recommended to use 1% tolerance resistors or better to keep the  
performance optimized. Matching is more important than overall tolerance.  
Resistor arrays with 1% matching can be used with a tolerance greater than 1%.Place the input resistors very  
close to the LY8212 to limit noise injection on the high-impedance nodes. For optimal performance the gain  
should be set to 4 V/V or lower. Lower gain allows the LY8212 to operate at its best,  
For example  
Table 1. Typical Total Gain and AVD Values  
Rf (KΩ)  
Ri (KΩ)  
150  
150  
2
150  
75  
150  
50  
150  
25  
150  
15  
Pre AMP. Gain  
Total Gain  
AVD (db)  
4
6
12  
20  
4
8
12  
24  
40  
12.04  
18.06  
21.58  
27.60  
32.04  
Input Capacitors (Ci)  
The LY8212 using single-end source, So the input coupling capacitors are required. The input capacitors and  
input resistors form a high-pass filter with the corner frequency(fc), determined in the equation.  
fc = 1 / ( 2πRi Ci )  
The value of the input capacitor is important to consider as it directly affects the bass (low frequency)  
performance of the circuit. Speakers in wireless phones cannot usually respond well to low frequencies, so  
the corner frequency can be set to block low frequencies in this application. Equation is reconfigured to solve  
for the input coupling capacitance.  
Ci = 1 / ( 2πRi fc )  
If the corner frequency is within the audio band, the capacitors should have a tolerance of ±10% or better,  
because any mismatch in capacitance causes an impedance mismatch at the corner frequency and below.  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
12  
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
For example  
In the table 2 shows the external components. Rin in connect with Cin to create a high-pass filter.  
Table 2. Typical Component Values  
Reference  
Description  
Note  
Ri  
Ci  
150KΩ  
0.22uF  
1% tolerance resistors  
80%/–20%  
Ci = 1 / ( 2πRi fc)  
Ci = 1 / ( 2π x 150KΩ x 4.8Hz)=0.221uF，Use 0.22uF  
Decoupling Capacitor  
The LY8212 is a high-performance class-D audio amplifier that requires adequate power supply decoupling to  
ensure the efficiency is high and total harmonic distortion (THD) is low. For higher frequency transients,  
spikes, or digital hash on the line, a good low equivalent-series-resistance (ESR) ceramic capacitor, typically  
10.0uF, placed as close as possible to the device VDD lead works best. Placing 0.1uF decoupling capacitor  
close to the LY8212 is very important for the efficiency of the class-D amplifier, because any resistance or  
inductance in the trace between the device and the capacitor can cause a loss in efficiency. For filtering  
lower-frequency noise signals, a 10.0uF or greater capacitor placed near the audio power amplifier would also  
help, but it is not required in most applications because of the high PSRR of this device.  
Over-Heat Protection  
The LY8212 has a built-in over-heat protection circuit at FM enhance pin enable, it will turn off all power  
output when the chip temperature over 180℃, the chip will return to normal operation automatically after the  
temperature cool down to 135℃.  
FM Enhance  
The LY8212 has a built-in FM enhance function. When FM signal is poor. Enable (active to high) the FM  
enhance pin will improve the signal obviously. But enable the pin will reduce LY8212 efficiency. Therefore  
recommend if FM function is not to use. Disable (active to low) the FM enhance pin is very important.  
„
PCB LAYOUT  
All the external components must place very close to the LY8212. The input resistors need to be very close to  
the LY8212 input pins so noise does not couple on the high impedance nodes between the input resistors and  
the input amplifier of the LY8212. Then place the decoupling capacitor Cs, close to the LY8212 is important  
for the efficiency of the class-D amplifier. Any resistance or inductance in the trace between the device and  
the capacitor can cause a loss in efficiency.  
Making the high current traces going to VDD, GND, VO+ and VO- pins of the LY8212 should be as wide as  
possible to minimize trace resistance. If these traces are too thin, the LY8212's performance and output  
power will decrease. The input traces do not need to be wide, but do need to run side-by-side to enable  
common-mode noise cancellation.  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
13  
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
„
DEMO BOARD INFORMATION  
Demo Board Application Circuit  
Figure 6. Demo Board Application Circuit  
Demo Board BOM List  
LY8212 V2.1 BOM List  
No.  
1
Description  
Reference  
Note  
Resistor, 100KΩ  
Resistor, 51KΩ  
Resistor, 0Ω  
R7,R9  
R1,R2  
R8,R12  
1/16W,1%  
1/16W,1%  
1/16W,1%  
2
3
80%/−20%,  
nonpolarized  
80%/−20%,  
nonpolarized  
4
5
Capacitor, 0.1uF  
Capacitor, 4.7uF  
C1,C2,C4,C5  
C3  
6
7
8
9
Capacitor, 10.0uF  
Capacitor, 220.0uF  
IC  
C7  
C6  
80%/−20%, 6.3V  
25V,105℃,8x11  
LY8212SL, SOP16  
Pitch 2.54 mm  
U1  
1*2 Pin Header  
J3,J6  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
14  
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
Demo Board Artwork  
Top Silkscreen  
Top Layer  
Composite view  
Bottom Layer  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
15  
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
„
PACKAGE OUTLINE DIMENSION  
SOP 16 Pin Package Outline Dimension  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
16  
®
LY8212  
3.3W Stereo & FM Enhancement Class D Audio Power Amplifier  
Rev. 1.5  
QFN4X4 16 Pin Package Outline Dimension  
Lyontek Inc. reserves the rights to change the specifications and products without notice.  
5F, No. 2, lndustry E . Rd. IX, Science-Based Industrial Park, Hsinchu 300, Taiwan  
TEL: 886-3-6668838  
FAX: 886-3-6668836  
17  
厂商 型号 描述 页数 下载

LYONTEK

 		LY8005 2.3 3W单声道无滤波器D类音频功率放大器（ MSOP ）[ 2.3 W Mono Filterless Class D Audio power Amplifier (MSOP) ] 22 页

LYONTEK

 		LY8005UL 2.3 3W单声道无滤波器D类音频功率放大器（ MSOP ）[ 2.3 W Mono Filterless Class D Audio power Amplifier (MSOP) ] 22 页

LYONTEK

 		LY8006 1.4 3W单声道无滤波器D类音频功率放大器（ MSOP / DFN ） - 兼容LY8890 / 8891 / 8891B单端输入[ 1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN) －Compatible with LY8890/8891/8891B Single-Ended Input ] 16 页

LYONTEK

 		LY8006BL 1.4 3W单声道无滤波器D类音频功率放大器（ MSOP / DFN ） - 兼容LY8890 / 8891 / 8891B单端输入[ 1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN) －Compatible with LY8890/8891/8891B Single-Ended Input ] 16 页

LYONTEK

 		LY8006UL 1.4 3W单声道无滤波器D类音频功率放大器（ MSOP / DFN ） - 兼容LY8890 / 8891 / 8891B单端输入[ 1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN) －Compatible with LY8890/8891/8891B Single-Ended Input ] 16 页

LYONTEK

 		LY8009VL [ 5.5W Mono Filterless Class D Audio power Amplifier ] 17 页

LYONTEK

 		LY8009_12 [ 5.5W Mono Filterless Class D Audio power Amplifier ] 17 页

LYONTEK

 		LY8010 为2.5W单声道无滤波器D类音频功率放大器（ WCSP封装/ DFN ）[ 2.5 W Mono Filterless Class D Audio power Amplifier (WCSP / DFN) ] 24 页

LYONTEK

 		LY8010BL 为2.5W单声道无滤波器D类音频功率放大器（ WCSP封装/ DFN ）[ 2.5 W Mono Filterless Class D Audio power Amplifier (WCSP / DFN) ] 24 页

LYONTEK

 		LY8010CL 为2.5W单声道无滤波器D类音频功率放大器（ WCSP封装/ DFN ）[ 2.5 W Mono Filterless Class D Audio power Amplifier (WCSP / DFN) ] 24 页

购物指南

支付方式

配送服务

售后服务

发票须知

优惠券使用规则

特色服务

PCBA制造

国产品牌推荐

国产料号替代

质量保证

技术资料

行业资讯

关于我们

关于壹壹捌

联系我们

联系我们

服务热线：400-618-9990

企业邮箱：sales@ic118.com

服务时间：周一至周六 8:30-17:30

壹壹捌官方微信号

PDF索引：

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

0

1

2

3

4

5

6

7

8

9

IC型号索引：

A

B

C

D

E

F

G

H

I

J

K

L

M

N

O

P

Q

R

S

T

U

V

W

X

Y

Z

0

1

2

3

4

5

6

7

8

9

Copyright 2024 gkzhan.com Al Rights Reserved 京ICP备06008810号-21 京

深圳网络警察报警平台
公共信息安全网络监察
经营性网站备案信息
不良信息举报中心
工商网监电子标识
全国公安机关备案
0.159588s