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LY8209U

型号：

LY8209U

品牌：

LYONTEK[ Lyontek Inc. ]

页数：

17 页

PDF大小：

721 K

下载PDF手册
®
LY8209  
Rev. 1.2  
3.3W/CH Stereo Class D Audio Power Amplifier  
„
FEATURES  
„
GENERAL DESCRIPTION  
„ 3.3W Stereo into 4Ω from 5.5V power supply at  
THD+N = 10% (Typ.).  
„ 2.0W Stereo into 8Ω from 5.5V power supply at  
THD+N = 10% (Typ.).  
The LY8209 is a high efficiency, high quality 3.3W  
stereo class D audio power amplifier. It is a low  
noise, filterless PWM architecture eliminates the  
output filter, reducing external component count,  
system cost, and simplify design.  
„ 2.5V~5.5V Power supply.  
„ Low shutdown current.  
„ Low quiescent current.  
„ Output pin short-circuit protection and  
automatic recovery.  
„ Over-Heat Protection and automatic recovery.  
„ Minimum external components.  
„ No output filter required for inductive loads.  
„ Low noise during turn-on and turn-off transitions.  
„ Lead free and green package available.  
(RoHS Compliant)  
„ Package : 10pin 150mil MSOP  
(without thermal pad) available.  
The device is designed to meet of Multimedia  
application includes mobile phones 、mini speaker  
and other portable electronic devices.  
The LY8209 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  
protection prevent the device from damage during  
fault conditions.  
The LY8209 is easily to be used in various portable  
applications and products.  
„
APPLICATION  
„ Portable electronic devices.  
„ Mobile phones.  
„ USB audio.  
„ Speaker docking.  
„ Bluetooth speaker.  
„
PIN CONFIGURATION  
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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
„
PIN DESCRIPTION  
Pin No.  
SYMBOL  
DESCRIPTION  
MSOP10  
INR  
1
2
Input of right channel.  
Shutdown  
Vo-(R)  
Vo+(R)  
GND  
Shutdown control pin. (when LOW level is shutdown mode).  
Negative(-) BTL output of right channel.  
Positive(+) BTL output of right channel.  
Ground  
3
4
5
Vo-(L)  
Vo+(L)  
VDD  
6
Negative(-) BTL output of left channel.  
Positive(+) BTL output of left channel.  
Power supply of left and right channel.  
Input of left channel.  
7
8
INL  
9
BYPASS  
10  
Bypass pin.  
„
ORDERING INFORMATION  
Speaker  
Ordering Code  
Pin/  
Package  
Output Power  
(THD+N=10%)  
Input  
Type  
Output  
Type  
Channels  
3.3W/4Ω @5.5V_BTL  
2.8W/4Ω @5.0V_BTL  
2.0W/8Ω @5.5V_BTL  
1.6W/8Ω @5.0V_BTL  
LY8209U  
Stereo  
MSOP10  
SE  
BTL  
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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
„
TYPICAL APPLICATION CIRCUIT  
Figure 1. LY8209 Typical Application Circuit  
„
ABSOLUTE MAXIMUM RATINGS  
PARAMETER  
SYMBOL  
VDD  
RATING  
6.0  
UNIT  
V
Supply Voltage  
℃
Operating Temperature  
Input Voltage  
TA  
-40 to 85 (I grade)  
-0.3V to VDD +0.3V  
-65 to 150  
Internally Limited  
2000  
VI  
V
℃
Storage Temperature  
Power Dissipation  
TSTG  
PD  
W
V
℃
℃
ESD Susceptibility  
VESD  
TJMAX  
TSOLDER  
Junction Temperature  
Soldering Temperature (under 10 sec)  
150  
260  
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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
„
ELECTRICAL CHARACTERISTICS (TA = 25℃)  
PARAMETER  
TYP. *2  
SYMBOL  
TEST CONDITION  
MIN.  
MAX. UNIT  
Power supply voltage  
-
2.5  
-
5.5  
V
VDD  
VDD = 5.0V, RL=4Ω  
VDD = 3.7V, RL=4Ω  
VDD = 2.5V, RL=4Ω  
-
-
-
-
6.5  
5.5  
5.0  
0.1  
-
-
-
-
-
-
Quiescent Current  
IQ  
mA  
Shutdown Current  
Shutdown voltage input high  
Shutdown voltage input low  
ISD  
≦
A
µ
VSHUTDOWN 0.8V,  
1.5  
-
VSDIH  
VSDIL  
V
VDD = 5.0V  
-
0.3  
VDD = 5.0V VI=0V,  
Av=11V/V  
,
Output offset voltage  
-
-
95  
mV  
VOS  
Shutdown temp.  
Restore temp.  
VDD= 2.5V to 5.5V  
-
-
150  
110  
-
-
Thermal shutdown temperature  
Total Gain *1  
TSD  
Gv  
℃
[150KΩ / (5KΩ+Ri)] x4  
V/V  
(*1)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.  
(*2)Typical values are included for reference only and are not guaranteed or tested.  
Typical values are measured at VDD = VDD(TYP.) and TA = 25℃  
„
OPERATING CHARACTERISTICS (1) (Stereo mode) (TA = 25℃)  
PARAMETER  
TYP. *2  
SYMBOL  
TEST CONDITION  
MIN.  
MAX. UNIT  
Av=11 V/V ,Input=GND  
PSRR Ri=51K, Ci=0.1μF  
-
-58  
-
f=1KHz  
Power supply rejection ratio  
dB  
f=217Hz  
-
-59  
-
RL=4Ohm, VDD=5.0V  
LÆR  
RÆL  
-
-
-77  
-80  
-
Crosstalk  
(Stereo mode)  
0.25W=0dB, f=1kHz,  
Cs  
dB  
-
RL = 4Ω, VDD=5.0V  
Av=11 V/V, RL = 8Ω,  
SNR Input pin floating,  
1W=0dB  
Signal-to-noise ratio  
Output voltage noise  
-
-
84  
-
-
dB  
VDD=5.0V  
VDD=5.0V  
Av=11 V/V, RL = 8Ω,  
Vn  
Input pin floating,  
f = 20 Hz to 20 kHz,  
VDD=2.5V~5.5V  
130  
uVRMS  
-
-
kHz  
%
-
220  
89  
Frequency  
Efficiency  
Fc  
VDD=5.0V,f=1kHz,  
RL=8Ω, Output=1.8W  
η
-
(*2)Typical values are included for reference only and are not guaranteed or tested.  
Typical values are measured at VDD = VDD(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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
„
OPERATING CHARACTERISTICS (2) (TA = 25℃)  
TYP. *2  
3.3  
2.8  
1.5  
0.6  
2.7  
2.2  
1.2  
0.5  
2.0  
1.6  
0.9  
0.4  
1.6  
1.3  
0.7  
0.3  
SYMBOL  
TEST CONDITION  
MIN.  
MAX. UNIT  
PARAMETER  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
VDD=5.5V  
THD+N= 10%, f = 1 kHz  
RL= 4Ω  
THD+N= 1%, f = 1 kHz,  
RL= 4Ω  
-
-
Output Power  
PO  
W
THD+N= 10%, f = 1 kHzVDD=5.0V  
-
-
-
-
-
-
-
RL= 8Ω  
VDD=3.7V  
VDD=2.5V  
VDD=5.5V  
THD+N= 1%, f = 1 kHz,  
VDD=5.0V  
RL= 8Ω  
VDD=3.7V  
VDD=2.5V  
(*2)Typical values are included for reference only and are not guaranteed or tested.  
Typical values are measured at VDD = VDD(TYP.) and TA = 25℃  
„
TYPICAL PERFORMACE CHARACTERISTICS  
Figure 2.  
Total Harmonic Distortion + Noise vs Output Power (RL = 4Ω, Stereo mode)  
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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
Figure 3.  
Total Harmonic Distortion + Noise vs Output Power (RL = 8Ω, Stereo mode)  
Figure 4.  
SNR vs. Noise Level  
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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
Figure 5.  
Crosstalk  
Figure 6  
FCC Class-B (Vertical)  
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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
Figure 7  
FCC Class-B (Horizontal)  
Figure 8  
CISPR Class-B (Vertical)  
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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
Figure 9  
CISPR Class-B ( Horizontal)  
SD Current vs. SD Voltage  
Quiescent Current vs. Supply voltage  
SHUTDOWN CURRENT vs SHUTDOWN VOLTAGE  
QUIESCENT CURRENT vs SUPPLY VOLTAGE  
8
6
4
2
0
10  
9
No Load  
4Ω, 2ch  
8Ω, 2ch  
2.5V  
3.7V  
5V  
8
7
6
5
4
3
2
0
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
0.7  
2.5  
3
3.7  
4.2  
5
5.5  
6
VDD - Supply Voltage - V  
Shutdown Voltage - V  
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
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
Supply Current vs. Output Power (RL=4Ω)  
Supply Current vs. Output Power (RL=8Ω)  
SUPPLY CURRENT vs OUTPUT POWER  
SUPPLY CURRENT vs OUTPUT POWER  
1400  
900  
2.5V(D)  
2.5V(D)  
800  
1200  
1000  
800  
600  
400  
200  
0
3.7V(D)  
5V(D)  
3.7V(D)  
700  
600  
500  
400  
300  
200  
100  
0
5V(D)  
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
1.4  
1.6  
1.8  
0
0.2  
0.4  
0.8  
1.2  
1.6  
2
2.4  
Po - Output Power - W RL=8Ω  
Po-Output Power-W RL=4Ω  
Load Resistance vs. Output Power (THD+N=10%)  
Load Resistance vs. Output Power (THD+N=1%)  
Output Power vs Load Resistance  
Output Power vs Load Resistance  
4.50  
3.50  
2.5V  
2.5V  
4.00  
3.50  
3.7V  
5V  
3.00  
2.50  
2.00  
1.50  
1.00  
0.50  
0.00  
3.7V  
5V  
6V  
6V  
3.00  
4.2V  
5.5V  
4.2V  
2.50  
5.5V  
2.00  
1.50  
1.00  
0.50  
0.00  
4Ω  
8Ω  
12Ω  
16Ω  
20Ω  
24Ω  
28Ω  
32Ω  
4Ω  
8Ω  
12Ω  
16Ω  
20Ω  
24Ω  
28Ω  
32Ω  
Load Resistance  
Load Resistance  
Output Power vs. VDD (RL=8Ohm)  
Output Power vs. VDD (RL=4Ohm)  
OUTPUT POWER vs. SUPPLY VOLTAGE(4Ω)  
OUTPUT POWER vs. SUPPLY VOLTAGE(8Ω)  
4.5  
2.8  
THD+N=10%  
THD+N=1%  
THD+N=10%  
THD+N=1%  
4
2.4  
2
3.5  
3
1.6  
1.2  
0.8  
0.4  
0
2.5  
2
1.5  
1
0.5  
0
2.5V  
3.7V  
4.2V  
5V  
5.5V  
6V  
2.5V  
3.7V  
4.2V  
5V  
5.5V  
6V  
VDD-Supply Voltage-V (RL=8Ohm, f=1KHz, Av=11 V/V)  
VDD-Supply Voltage-V (RL=4Ohm, f=1KHz, Av=11 V/V)  
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  
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
Efficiency vs. Output Power (8Ohm) 3.7V  
Efficiency vs. Output Power (8Ohm) 5.0V  
Efficiency vs Output Power(W)  
(RL=8Ω SPEAKER+33uH),VDD=5V  
Efficiency vs Output Power(W)  
(RL=8Ω SPEAKER+33uH),VDD=3.7V  
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
100  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
0
0.1 0.2 0.4 0.6 0.8  
1 1.2 1.4 1.6 1.8  
0
0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9  
Po-Output Power(W)  
1
Po-Output Power(W)  
Efficiency vs. Output Power (4Ohm) 3.7V  
Efficiency vs. Output Power (4Ohm) 5.0V  
Efficiency vs Output Power(W)  
Efficiency vs Output Power(W)  
(RL=4Ω SPEAKER+33uH),VDD=3.7V  
RL=4Ω SPEAKER+33uH,VDD=5V  
100  
100  
90  
80  
70  
60  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
50  
40  
30  
20  
10  
0
0
0.1 0.2 0.4 0.6 0.8  
1 1.2 1.4 1.5 1.6  
0
0.1 0.2 0.4 0.8  
1
1.2 1.6  
2 2.4 2.8  
Po-Output Power(W)  
Po-Output Power(W)  
Dissipation vs. Output Power (8Ohm)  
Dissipation vs. Output Power (4Ohm)  
POWER DISSIPATION vs OUTPUT POWER  
POWER DISSIPATION vs OUTPUT POWER  
0.3  
0.25  
0.2  
1.2  
1
(5V)PD  
(5V)PD  
(3.7V)PD  
(3.7V)PD  
0.8  
0.6  
0.4  
0.2  
0
0.15  
0.1  
0.05  
0
0
0.19 0.37 0.74 1.10 1.46 1.81 2.16 2.47 2.66 2.82 3.53 4.19 4.86  
0
0.20 0.39 0.58 0.76 0.95 1.13 1.30 1.46 1.62 1.78  
Po - Output Power - W RL=4Ω SPEAKER+33uH  
Po - Output Power - W (RL=8Ω SPEAKER+33uH)  
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  
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
„
APPLICATION INFORMATION  
Input Resistors (Ri) and Gain  
The LY8209 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  
(Rf=150KΩ) 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 LY8209 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 LY8209 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 LY8209 using fully differential 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  
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
For example  
In the table 2 shows the external components. Rin in connect with Cin to create a high-pass filter.  
Table 2. Reference Component Values  
Reference  
Description  
Note  
Ri  
Ci  
150KΩ  
51 KΩ  
0.22uF 0.1uF  
10.6Hz 14.18Hz 31.2Hz  
1% tolerance resistors  
80%/–20% non polarized  
0.22uF  
4.8Hz  
0.1uF  
corner frequency  
Ci = 1 / ( 2πRi fc)  
Ci = 1 / ( 2π x 150KΩ x 4.8Hz)=0.221uF，One would likely choose a value of 0.22uF as this value is  
commonly used.  
Bypass Capacitor (Cbypass)  
The Bypass Capacitor (C3 ) is the most critical capacitor. During start-up or recovery from shutdown mode,  
Cbypass determines the rate at which the amplifier starts up. The Cbypass will to reduce noise caused by the  
power supply coupling into the output drive signal. This noise is from the internal analog reference to the  
amplifier, which appears as degraded the PSRR and THD+N values. The bypass capacitor (C3 ) with values  
of 1.0μF to 10.0μF is recommended for the best THD and noise performance. Therefore, increasing the  
bypass capacitor reduces clicking and popping noise from power on/off and entering and leaving shutdown.  
Table 3. CBYPASS Reference Component Values  
SYMBOL  
TEST CONDITION  
MIN.  
TYP.  
560  
300  
150  
120  
460  
250  
135  
100  
MAX. UNIT  
PARAMETER  
VDD=5.0V,  
Cbypass = 10.0μf  
Cbypass = 4.7μf  
Cbypass = 2.2μf  
-
-
-
-
-
-
-
-
-
-
-
Ci=0.1uF,  
Ri=51KΩ,  
Av=11  
Start-up time  
from shutdown  
C
bypass = 1.0μf  
-
ZI  
ms  
VDD=3.7V,  
Ci=0.1uF,  
Ri=51KΩ,  
Av=11  
Cbypass = 10.0μf  
Cbypass = 4.7μf  
Cbypass = 2.2μf  
Cbypass = 1.0μf  
-
-
-
-
Shutdown Function  
When the LY8209 not in use. The device will be to turn off the amplifier to reduce power consumption. When  
logic low is applied to the shutdown pin, this shutdown feature will turns the amplifier off. By switching the  
shutdown pin connected to GND, the device supply current draw will be minimized in idle mode. The pin  
cannot be left floating due to the internal did not pull-up.  
Over-Heat Protection  
The LY8209 has a built-in over-heat protection circuit, it will turn off all power output when the chip  
temperature over 150℃, the chip will return to normal operation automatically after the temperature cool down  
to 110℃.  
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  
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
Short-circuit Protection  
The LY8209 has short circuit protection circuitry on the outputs to prevent damage when output-to-output  
short occurs. When a short circuit is detected on the outputs, the outputs are disabled immediately. If the short  
was removed, the device activates again.  
„
PCB LAYOUT  
All the external components must place very close to the LY8209. The input resistors need to be very close to  
the LY8209 input pins so noise does not couple on the high impedance nodes between the input resistors and  
the input amplifier of the LY8209. Then place the decoupling capacitor Cs, close to the LY8209 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.  
If device had AVDD(Analog VDD) pin, place the decoupling capacitor 0.1uF, close to the device pin is very  
important.  
Making the high current traces going to VDD, GND, VO+ and VO- pins of the LY8209 should be as wide as  
possible to minimize trace resistance. If these traces are too thin, the LY8209'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  
14  
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
„
DEMO BOARD INFORMATION  
Demo Board Application Circuit : (Stereo Mode)  
Figure 10. Demo Board Application Circuit  
Demo Board BOM List :  
LY8209 V1.0 BOM List (Stereo Mode)  
No.  
Description  
Reference  
Note  
1
2
3
Resistor, 47KΩ  
Resistor, 100KΩ  
Capacitor, 0.1uF  
R1,R2  
R9  
C1,C2,C4  
1/16W,1%  
1/16W,1%  
80%/−20%, non polarized  
80%/−20%, non polarized  
4
Capacitor, 4.7uF  
C3  
25V,105℃,8x11,EC Cap.  
LY8209U, (MSOP10)  
Pitch 2.54 mm  
80%/−20%, nonpolarized  
80%/−20%, nonpolarized  
5
6
7
8
9
Capacitor, 220.0uF  
IC  
1*2 Pin Header  
Capacitor, 330pF(Option) C12,C13,C15,C16  
Capacitor, 390pF(Option) C11,C14  
C6  
U2  
J2,J6  
Chip Bead  
1000Ω(1KΩ)±25%/100MHz  
10  
L1,L2,L3,L4,L5,L6  
1KΩ/100MHz(Option)  
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  
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
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  
16  
®
LY8209  
3.3W/CH Stereo Class D Audio Power Amplifier  
Rev. 1.2  
„
PACKAGE OUTLINE DIMENSION  
MSOP 10 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  
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