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LY8009VL

型号：

LY8009VL

品牌：

LYONTEK[ Lyontek Inc. ]

页数：

17 页

PDF大小：

545 K

下载PDF手册
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
FEATURES  
GENERAL DESCRIPTION  
„ 5.5W Into 2Ω from 5.5V power supply at  
THD+N = 10% (Typ).  
„ 3.6W Into 4Ω from 5.5V power supply at  
THD+N = 10% (Typ).  
„ 2.5V~5.5V power supply.  
„ Low shutdown current.  
„ Low quiescent current.  
„ 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 : 8pin 150mil ESOP available.  
The LY8009 is a high efficiency, 5.5W mono 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.  
The LY8009 is designed to meet of portable  
electronic devices and mini speaker system. In  
cellular handsets, the earpiece, speaker phone, and  
melody ringer can each be driven by the LY8009.  
The device is a single 5.5V power supply, it is  
capable of driving 2Ω speaker load at a continuous  
average output of 5.5W with 10% THD+N.  
The gain of the LY8009 is externally configurable  
which allows independent gain control from multiple  
sources by summing the signals.  
The device also features an internal thermal  
shutdown protection and output pin short circuit  
protection prevent the device from damage during  
fault conditions.  
APPLICATION  
„ Portable electronic devices  
„ USB audio, Audio System.  
„ Mini combo system, PDAs  
PIN CONFIGURATION  
LY8009 ESOP8 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
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
PIN DESCRIPTION  
Pin No.  
SYMBOL  
DESCRIPTION  
ESOP  
SHUTDOWN  
BYPASS  
AVDD  
IN  
1
2
3
4
5
6
7
8
Shutdown control pin.(Low enable the device)  
Bypass pin.  
Analog power supply.  
Audio input pin.  
Vo-  
Negative BTL output.  
Power supply.  
VDD  
GND  
Ground.  
Vo+  
Positive BTL output.  
ORDERING INFORMATION  
Speaker  
Channels Package  
Pin/  
Output Power  
(THD+N=10%)  
Input Output  
Ordering Code  
Type  
Type  
5.5W/2Ω @5.5V_BTL  
4.5W/3Ω @5.5V_BTL  
3.6W/4Ω @5.5V_BTL  
2.0W/8Ω @5.5V_BTL  
LY8009VL  
Mono  
ESOP8  
SE  
BTL  
*1 ESOP Æ with thermal pad.  
APPLICATION CIRCULT  
Figure 1. LY8009 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  
2
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
ABSOLUTE MAXIMUM RATINGS  
PARAMETER  
SYMBOL  
RATING  
UNIT  
V
Supply Voltage  
VDD  
6.0  
℃
Operating Temperature  
TA  
-40 to 85 ( I grade)  
Input Voltage  
VI  
TSTG  
PD  
-0.3V to VDD +0.3V  
-65 to 150  
Internally Limited  
2000  
V
℃
Storage Temperature  
Power Dissipation  
W
V
℃
℃
ESD Susceptibility  
VESD  
TJMAX  
TSOLDER  
Junction Temperature  
Soldering Temperature (under 10 sec)  
150  
260  
ELECTRICAL CHARACTERISTICS (TA = 25℃)  
SYMBOL  
TEST CONDITION  
MIN.  
2.5  
TYP.  
-
MAX. UNIT  
PARAMETER  
Supply voltage  
5.5  
V
VDD  
VDD = 5.5V, No Load  
VDD = 3.7V, No Load  
VDD = 2.5V, No Load  
-
-
-
4.0  
3.5  
3.0  
-
-
-
Quiescent Current  
IQ  
mA  
≦
0.8V,  
DD = 2.5V to 5.5V  
VSHUTDOW  
V
N
Shutdown Current  
ISD  
-
0.1  
-
A
µ
Shutdown voltage input high  
Shutdown voltage input low  
VSDIH  
VSDIL  
1.4  
-
-
-
-
V
0.3  
VI = 0 V, Av = 2 V/V,  
DD = 2.5 V to 5.5 V  
Output offset voltage  
VOS  
-
-
50  
mV  
V
Shutdown temp.  
Restore temp.  
VDD= 2.5V to 5.5V  
-
-
145  
120  
-
-
Thermal shutdown temperature  
Total Gain (*)  
TSD  
Gv  
℃
[150KΩ / (5KΩ+Ri)] x4  
V/V  
(*)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  
3
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
„
OPERATING CHARACTERISTICS (1)(TA = 25℃)  
SYMBOL  
TEST CONDITION  
MIN.  
TYP.  
5.5  
4.5  
2.5  
1.0  
4.5  
3.6  
2.0  
0.8  
3.6  
3.0  
1.6  
0.7  
2.9  
2.4  
1.3  
0.5  
2.1  
1.7  
0.9  
0.4  
1.6  
1.4  
0.7  
0.3  
MAX. UNIT  
PARAMETER  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
VDD=5.5V  
THD+N= 10%, f = 1 kHz,  
RL= 2Ω  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
THD+N= 1%, f = 1 kHz,  
RL= 2Ω  
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
THD+N= 10%, f = 1 kHz,  
RL= 4Ω  
Output Power  
PO  
W
-
THD+N= 1%, f = 1 kHz,  
RL= 4Ω  
-
-
-
-
-
-
-
-
-
-
-
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
THD+N= 10%, f = 1 kHz,  
RL= 8Ω  
THD+N= 1%, f = 1 kHz,  
RL= 8Ω  
VDD=5.0V, Input=GND.  
PSRR Ri=51K, Ci=0.1μF.  
-
-
-
-55  
-54  
80  
-
f=1KHz  
Power supply rejection ratio  
Signal-to-noise ratio  
dB  
f=217Hz  
-
RL=4Ohm,  
RL = 8Ω, Input=GND,  
1.0W=0dB  
VDD=5.0V,Input=GND, Load=4Ω,  
Ri=150K,Ci=0.1uF,  
f = 20 Hz to 20 kHz,  
SNR  
-
-
dB  
uV  
VDD=5.0V  
-
-
181  
274  
Output voltage noise  
Vn  
VDD=5.0V,Input=GND, Load=4Ω,  
Ri=51K,Ci=0.1uF,  
-
f = 20 Hz to 20 kHz,  
VDD=5.0V,f=1kHz,RL=4Ω,  
Output power =3.0W  
VDD=3.7V,f=1kHz,RL=4Ω,  
Output power =1.6W  
VDD=5.0V,f=1kHz,RL=2Ω,  
Output power =4.5W  
-
-
-
85  
85  
77  
-
-
-
Efficiency  
η
%
V
DD=3.7V,f=1kHz,RL=2Ω,  
-
-
77  
-
-
Output power =2.4W  
VDD=2.5V~5.5V  
210  
kHz  
Frequency  
Fc  
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
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
„
OPERATING CHARACTERISTICS (2) (TA = 25℃)  
TEST CONDITION  
SYMBOL  
MIN.  
TYP.  
MAX. UNIT  
PARAMETER  
Voltage  
Cbypass Cap.  
Cbypass = 4.7μF  
Cbypass = 2.2μF  
Cbypass = 1.0μF  
Cbypass =0.47μF  
Cbypass = 0.22μF  
Cbypass =None  
Cbypass = 4.7μF  
Cbypass = 2.2μF  
Cbypass = 1.0μF  
Cbypass =0.47μF  
Cbypass = 0.22μF  
Cbypass =None  
-
-
-
-
-
-
-
-
-
-
-
-
200  
96  
84  
40  
20  
20  
156  
80  
72  
36  
22  
20  
-
-
-
-
-
VDD = 5.0V  
-
Start-up time from shutdown  
ZI  
ms  
-
-
-
-
-
-
VDD = 3.7V  
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
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
TYPICAL PERFORMANCE CHARACTERISTICS  
Figure 2  
Total Harmonic Distortion + Noise vs Output Power (2Ω)  
Figure 3  
Total Harmonic Distortion + Noise vs Output Power (4Ω)  
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
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
Figure 4  
Total Harmonic Distortion + Noise vs Output Power (8Ω)  
Figure 5  
Frequency Response  
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
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
Icc Current vs. Shutdown Voltage  
Quiescent Current vs. Supply Voltage  
QUIESCENT CURRENT vs SUPPLY VOLTAGE  
Icc CURRENT vs SHUTDOWN VOLTAGE  
7
6
5
4
3
2
1
0
16  
2.5V  
3.7V  
5V  
14  
12  
10  
8
6
No Load  
4
8Ω  
4Ω  
2Ω  
2
0
0
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
0.7  
2.5  
3
3.7  
4.2  
5
VDD-Supply Voltage-V  
5.5  
6
Shutdown Voltage - V  
Supply Current vs. Output Power (RL=2Ω)  
Supply Current vs. Output Power (RL=3Ω)  
SUPPLY CURRENT vs OUTPUT POWER  
SUPPLY CURRENT vs OUTPUT POWER  
1400  
900  
2.5V  
3.7V  
5V  
2.5V  
3.7V  
5V  
800  
700  
600  
500  
400  
300  
200  
100  
0
1200  
1000  
800  
600  
400  
200  
0
0
0.2 0.4 0.8 1.2 1.6  
2
2.4 2.8  
3
3.2 3.6  
0
0.2 0.4 0.8 1.2 1.6  
2
2.4 2.8  
3
3.2 3.6  
4
4.4 4.6  
Po - Output Power - W (RL=3Ω)  
Po-Output Power-W (RL=2Ω)  
Supply Current vs. Output Power (RL=4Ω)  
Supply Current vs. Output Power (RL=8Ω)  
SUPPLY CURRENT vs OUTPUT POWER  
SUPPLY CURRENT vs OUTPUT POWER  
800  
450  
2.5V  
3.7V  
5V  
2.5V  
3.7V  
5V  
700  
600  
500  
400  
300  
200  
100  
0
400  
350  
300  
250  
200  
150  
100  
50  
0
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  
2.8  
3
Po - Output Power - W (RL=8Ω)  
Po - Output Power - W (RL=4Ω)  
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
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
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  
6
5
2.5v  
2.5v  
4.5  
3.7V  
3.7V  
5V  
5
5V  
4
3.5  
3
5.5V  
5.5V  
4
3
2
1
0
2.5  
2
1.5  
1
0.5  
0
2Ω  
3Ω  
4Ω  
8Ω  
12Ω  
16Ω  
20Ω  
24Ω  
28Ω  
32Ω  
2Ω  
3Ω  
4Ω  
8Ω  
12Ω  
16Ω  
20Ω  
24Ω  
28Ω  
32Ω  
Load Resistance  
Load Resistance  
Output Power vs. VDD (RL=2Ω)  
Output Power vs. VDD (RL=3Ω)  
OUTPUT POWER vs SUPPLY VOLTAGE  
OUTPUT POWER vs SUPPLY VOLTAGE  
7
5.5  
THD+N=10%  
THD+N=1%  
6.5  
6
THD+N=10%  
THD+N=1%  
5
4.5  
4
5.5  
5
4.5  
4
3.5  
3
3.5  
3
2.5  
2
2.5  
2
1.5  
1
1.5  
1
0.5  
0
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 (2Ω)  
VDD-Supply Voltage-V (3Ω)  
Output Power vs. VDD (RL=8Ω)  
OUTPUT POWER vs. SUPPLY VOLTAGE  
Output Power vs. VDD (RL=4Ω)  
OUTPUT POWER vs SUPPLY VOLTAGE  
4.5  
4
2.8  
THD+N=10%  
THD+N=1%  
THD+N=10%  
THD+N=1%  
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 (8Ω)  
VDD-Supply Voltage-V (4Ω)  
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
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
Efficiency vs. Output Power (2Ω) 3.7V  
Efficiency vs Output Power (W)(RL=2Ω)  
Efficiency vs. Output Power (2Ω) 5.0V  
Efficiency vs Output Power(W) (RL=2Ω)  
90  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
VDD=3.7V  
80  
70  
60  
50  
40  
30  
20  
10  
0
VDD=5V  
0
0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4  
Po-Output Power(W)  
0
0.6 1.2 1.8 2.4  
3
3.6 4.2 4.8  
Po-Output Power(W)  
Efficiency vs. Output Power (3Ω) 3.7V  
Efficiency vs. Output Power (3Ω) 5.0V  
Efficiency vs Output Power (W)(RL=3Ω)  
Efficiency vs Output Power (W)(RL=3Ω)  
90  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
80  
70  
60  
50  
40  
30  
20  
10  
0
VDD=5V  
VDD=3.7V  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
4
0
0.25 0.5 0.75  
1
1.25 1.5 1.75  
2
Po-Output Power(W)  
Po-Output Power(W)  
Efficiency vs. Output Power (4Ω) 3.7V  
Efficiency vs. Output Power (4Ω) 5.0V  
Efficiency vs Output Power (W)(RL=4Ω)  
Efficiency vs Output Power (W)(RL=4Ω)  
90  
90  
80  
70  
60  
50  
40  
30  
20  
10  
0
VDD=5V  
VDD=3.7V  
80  
70  
60  
50  
40  
30  
20  
10  
0
0
0.2  
0.4  
0.6  
0.8  
1
1.2  
1.4  
1.6  
0
0.4 0.8 1.2 1.6  
2
2.4 2.8 3.2  
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  
10  
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
Dissipation vs. Output Power (2Ω)  
Dissipation vs. Output Power (3Ω)  
POWER DISSIPATION vs OUTPUT POWER  
POWER DISSIPATION vs OUTPUT POWER  
1
0.8  
0.6  
0.4  
0.2  
0
1.6  
1.4  
1.2  
1
(5V)  
5V  
3.7V  
(3.7V)  
0.8  
0.6  
0.4  
0.2  
0
0
0.6  
1.2  
1.8  
2.4  
3
3.6  
4.2  
4.8  
0
0.5  
1
1.5  
2
2.5  
3
3.5  
4
Po-Output Power - W RL=2Ω  
Po - Output Power - W RL=3Ω  
Dissipation vs Output Power (4Ω)  
POWER DISSIPATION vs OUTPUT POWER  
1
5V  
3.7V  
0.8  
0.6  
0.4  
0.2  
0
0
0.4  
0.8  
1.2  
1.6  
2
2.4  
2.8  
3.2  
Po - Output Power - W RL=4Ω  
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  
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
APPLICATION INFORMATION  
Input Resistors (Ri) and Gain  
The input resistors (Ri) set the gain of the amplifier according to the equation.  
Pre-Amplifier Gain = (Rf / Ri) x 2 = [150KΩ / ( 5KΩ + Ri )] x 2  
Total Gain = [(Rf / Ri) x 2] x 2 = {[150KΩ / ( 5KΩ + Ri )] x 2} x 2  
AVD = 20 x log {2 x [(Rf /Ri ) x2]}  
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 LY8009 to limit noise injection on the high-impedance nodes. For optimal performance the gain  
should be set to 2 V/V or lower. Lower gain allows the LY8009 to operate at its best,  
For example  
Table 1. Typical Total Gain and AVD Values  
Rf (KΩ)  
Ri (KΩ)  
150  
300  
1
150  
150  
2
150  
100  
3
150  
75  
150  
50  
150  
37.5  
8
Pre AMP. Gain  
Total Gain  
AVD (dB)  
4
6
2
4
6
8
12  
16  
6.02  
12.04  
15.56  
18.06  
21.58  
24.08  
Input Capacitors (Ci)  
The LY8009 using a single-ended 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  
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
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  
0.22uF  
1% tolerance resistors  
80%/–20%  
Ci = 1 / ( 2πRi fc)  
Ci = 1 / ( 2π*150KΩ*4.8Hz)=0.221uF，Use 0.22uF  
Two Single-Ended Input Signals  
Two resistors and two capacitors are needed for summing single-ended input signals. The gain and corner  
frequencies (fc1 and fc2) for each input source can be set independently.  
Pre-Amplifier Gain 1 = [150KΩ / ( 5KΩ + Ri1 )] x 2  
Pre-Amplifier Gain 2 = [150KΩ / ( 5KΩ + Ri2 )] x 2  
Ci1 = 1 / ( 2πRi1 fc1 )  
Ci2 = 1 / ( 2πRi2 fc2 )  
Figure 6. Application Schematic With Two Single-Ended Inputs Configuration  
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 4.7μF 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.  
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  
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
Shutdown Function  
When the LY8009 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.  
Over-Heat Protection  
The LY8009 has a built-in over-heat protection circuit, it will turn off all power output when the chip  
temperature over 145℃, the chip will return to normal operation automatically after the temperature cool down  
to 120℃.  
Short-circuit Protection  
The LY8009 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 LY8009. The input resistors need to be very close to  
the LY8009 input pins so noise does not couple on the high impedance nodes between the input resistors and  
the input amplifier of the LY8009. Then place the decoupling capacitor C4, close to the LY8009 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 LY8009 should be as wide as  
possible to minimize trace resistance. If these traces are too thin, the LY8009'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.  
I
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  
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
„
DEMO BOARD INFORMATION  
Demo Board Application Circuit :  
Demo Board BOM List  
LY8009 V1.0 BOM List  
No.  
1
Description  
Resistor, 100KΩ  
Reference  
Note  
R9  
1/16W,1%  
1/16W,1%  
1/16W,1%  
2
Resistor, 51KΩ  
Resistor, 100Ω  
Capacitor, 0.1uF  
Capacitor, 4.7uF  
Capacitor, 220.0uF  
IC  
R1  
3
R56  
4
C1,C4,C56  
80%/−20%, nonpolarized  
80%/−20%, nonpolarized  
25V,105℃,8x11,EC Cap.  
LY8009VL, ESOP8  
5
C3  
C6  
U1  
J6  
6
7
8
9
1*2 Pin Header  
Pitch 2.54 mm  
Capacitor, 330pF(Option) C12,C13  
80%/−20%, nonpolarized  
80%/−20%, nonpolarized  
10 Capacitor, 390pF(Option) C11  
Chip Bead  
1000Ω(1KΩ)±25%/100MHz  
11  
L1,L2  
R2,C2  
1KΩ/100MHz(Option)  
12 NC  
No Components  
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  
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
LY8009 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  
®
LY8009  
5.5W Mono Filterless Class D Audio power Amplifier  
Rev. 1.1  
PACKAGE OUTLINE DIMENSION  
8 Pin ESOP 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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