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LY8897_13

型号：

LY8897_13

品牌：

LYONTEK[ Lyontek Inc. ]

页数：

17 页

PDF大小：

1235 K

下载PDF手册
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
FEATURES  
GENERAL DESCRIPTION  
„ 2.7W Into 4Ω from 5.0V power supply at  
THD+N = 10% (Typ.).  
„ 1.7W Into 8Ω from 5.0V power supply at  
THD+N = 10% (Typ.)  
The LY8897 is a 2.7W audio power amplifier. It is  
capable of driving 4ꢀ speaker load at a continuous  
average output of 2.7W with less than 10%  
distortion (THD+N) from a 5.0V power supply and  
8ꢀ speaker load at a continuous average output of  
1.7W with less than 10% distortion (THD+N) from a  
5.0V power supply.  
The LY8897 primarily designed for high quality  
application in other portable communication device.  
And the LY8897 audio amplifier features low power  
consumption shutdown mode. It is achieved by  
driving the shutdown pin with logic low.  
„ 2.0V~5.5V Power supply.  
„ Low shutdown current.(TYP.=0.05uA)  
„ Low quiescent current.(TYP.=3.0mA)  
„ Thermal shutdown protection with auto recovery  
feature.  
„ Advanced power ON/OFF pop reduction.  
„ Lead free and green package available.  
(RoHS Compliant)  
„ Space Saving Package  
And the LY8897 has an internal thermal shutdown  
protection feature.  
-- 8-pin EMSOP package. (with thermal pad)  
-- 8-pin MSOP package. (without thermal pad)  
The LY8897 audio amplifier was designed  
specifically to provide high quality output power with  
a minimal amount of external components. The  
LY8897 does not require output capacitors, and the  
LY8897 is ideally suited for other low voltage  
applications or portable electronic devices where  
APPLICATION  
„ Boom Box.  
„ Education, Toy.  
„ MID,  
minimal power consumption is  
requirement.  
a
primary  
„ Portable electronic devices.  
„ Mobile Phones.  
PIN CONFIGURATION  
Power ON POP Noise  
Power OFF POP Noise  
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
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
PIN DESCRIPTION  
Pin No.  
EMSOP8  
SYMBOL  
DESCRIPTION  
MSOP8  
SHUTDOWN  
BYPASS  
+IN  
1
2
3
4
5
6
7
8
1
2
3
4
5
6
7
8
Shutdown the device. (when LOW level is shutdown mode)  
Bypass pin  
Positive Input  
Negative Input  
Negative output  
Power Supply  
Ground  
-IN  
Vo1(-)  
VDD  
GND  
Vo2(+)  
Positive Output  
ORDERING INFORMATION  
Speaker  
Pin/  
Package  
Output Power  
(THD+N=10%)  
Input  
Type  
Output  
Type  
Ordering Code  
Channels  
EMSOP8  
(with thermal pad)  
2.7W/4ꢀ @5.0V_BTL  
1.7W/8ꢀ @5.0V_BTL  
SE/  
DF  
LY8897X  
LY8897U  
Mono  
Mono  
BTL  
BTL  
MSOP8  
(without thermal pad)  
2.7W/4ꢀ @5.0V_BTL  
1.7W/8ꢀ @5.0V_BTL  
SE/  
DF  
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
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
APPLICATION CIRCUIT  
Figure 1. LY8897 application schematic with Single –Ended input  
Figure 2. LY8897 application schematic with Differential input  
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
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
ABSOLUTE MAXIMUM RATINGS  
PARAMETER  
Supply Voltage  
SYMBOL  
VDD  
RATING  
6.0  
UNIT  
V
℃
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  
DC ELECTRICAL CHARACTERISTICS (TA=25℃)  
SYMBOL  
TEST CONDITION  
MIN.  
TYP. *2  
MAX. UNIT  
PARAMETER  
Power supply voltage  
Quiescent Current  
Shutdown Current  
Shutdown Voltage Input High  
Shutdown Voltage Input Low  
Output Offset Voltage  
VDD  
IQ  
ISD  
VSDIH  
VSDIL  
VOS  
--  
2.0  
-
-
1.2  
-
-
3.0  
0.05  
-
5.5  
9.0  
2.0  
-
0.4  
50.0  
V
mA  
A
µ
VDD=5.0V, Load=4ꢀ.  
VDD=5.0V, VSD=0V  
VDD=5.0V, VSD Mode = VDD  
VDD=5.0V, VSD Mode = GND  
VDD=5.0V, Load=4ꢀ.  
V
-
-
7.0  
mV  
(*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℃  
OPERATING CHARACTERISTICS(1) (TA=25℃)  
SYMBOL  
TEST CONDITION  
Vripple = 200mV  
MIN.  
TYP. *2  
MAX. UNIT  
PARAMETER  
1KHz  
-
68.77  
-
sine p-p, VDD=5.0V,  
RL=4ꢀ, Av=2.  
Input=GND.  
217Hz  
1KHz  
-
-
-
55.60  
68.31  
67.73  
-
Power Supply Rejection Ratio  
PSRR  
dB  
Vripple = 200mV  
sine p-p, VDD=5.0V,  
RL=4ꢀ, Av=2.  
-
-
-
217Hz  
Input=Floating.  
A-weight  
VDD=5.0V,RL=8ꢀ, ing  
-
-
-
-
94.26  
91.78  
38.7  
Signal-to-noise ratio  
SNR Input=GND, Av=2,  
1W=0dB,  
dB  
None  
A-weight  
ing  
-
A-weight  
ing  
None  
A-weight  
ing  
VDD=5.0V,Av=2,  
f=20Hz~20KHz,  
Input=GND,  
RL=4ꢀ SPK,  
-
Output voltage noise  
Vn  
uV  
51.5  
-
Shutdown temp.  
TSD  
-
-
160  
130  
-
-
℃
Thermal shutdown temperature  
Restore temp.  
(*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
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
OPERATING CHARACTERISTICS(2) (TA=25℃)  
SYMBOL  
TEST CONDITION  
MIN.  
TYP. *2  
3.3  
2.7  
1.5  
0.6  
0.37  
2.5  
2.0  
1.1  
MAX. UNIT  
PARAMETER  
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
-
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
VDD=2.0V  
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
RL=4ꢀ*3  
THD=10%,f=1 kHz  
RL=4ꢀ*3  
THD=1%,f=1 kHz  
0.5  
-
0.24  
-
VDD=2.0V  
Output Power  
Po  
W
-
-
-
-
-
-
-
-
-
-
2.0  
1.7  
1.0  
0.4  
0.25  
1.6  
1.3  
0.7  
0.3  
0.2  
-
-
-
-
-
-
-
-
-
-
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
VDD=2.0V  
VDD=5.5V  
VDD=5.0V  
VDD=3.7V  
VDD=2.5V  
VDD=2.5V  
RL=8ꢀ  
THD=10%,f=1 kHz  
RL=8ꢀ  
THD=1%,f=1 kHz  
(*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) When driving 4ꢀ loads from 4.2V~5V power supply, the device must be mounted to a circuit board.  
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
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
TYPICAL PERFORMANCE CHARACTERISTICS  
Figure 3  
THD+N vs. Output Power (@ RL=4ꢀ, f=1kHz, AV=10)  
Figure 4  
THD+N vs. Output Power (@ RL=8ꢀ, f=1kHz, AV=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  
6
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
Figure 5  
Power Supply Rejection Ratio (PSRR)  
Figure 6  
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
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
Figure 7  
SNR vs. Noise Level  
SD Current vs. SD Voltage  
SHUTDOWN CURRENT vs SHUTDOWN VOLTAGE  
Quiescent Current vs. Supply voltage  
QUIESCENT CURRENT vs SUPPLY VOLTAGE  
1
0.9  
0.8  
0.7  
0.6  
0.5  
0.4  
0.3  
0.2  
0.1  
5
4
3
2
1
2.5V  
3.7V  
5.0V  
No Load  
8ꢀ  
4ꢀ  
0
0
2.0  
2.5  
3.0  
3.7  
4.2  
5.0  
5.5  
6.0  
0.1  
0.2  
0.3  
0.4  
0.5  
0.6  
0.7  
0.8  
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  
8
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
VDD Current vs. Output Power (RL=4ꢀ)  
VDD Current vs. Output Power (RL=8ꢀ)  
SUPPLY CURRENT vs OUTPUT POWER(RL=8ꢀ)  
SUPPLY CURRENT vs OUTPUT POWER(RL=4ꢀ)  
1000  
900  
800  
700  
600  
500  
400  
300  
200  
100  
0
500  
450  
400  
350  
300  
250  
200  
150  
100  
50  
2.0V  
2.5V  
3.7V  
5.0V  
2.0V  
2.5V  
3.7V  
5.0V  
0
0
0.2  
0.4  
0.8  
1
1.2  
1.8  
0
0.2 0.4 0.8  
1
1.2 1.8 2.2 2.4 2.6 2.8  
3
3.2 3.4  
Po-Output Power-W(RL=4ꢀ)  
Po - Output Power - W(RL=8ꢀ)  
Load Resistance vs. Output Power (THD+N=10%)  
Load Resistance vs. Output Power (THD+N=1%)  
Output Power vs Load Resistance (THD+N=10)  
Output Power vs Load Resistance (THD+N=1%)  
3.50  
3.00  
2.5V  
3.7V  
2.5V  
3.7V  
3.00  
2.50  
5V  
5V  
2.50  
4.2V  
5.5V  
2.00  
4.2V  
2.00  
5.5V  
1.50  
1.50  
1.00  
0.50  
0.00  
1.00  
0.50  
0.00  
4ꢀ  
8ꢀ  
12ꢀ  
16ꢀ  
20ꢀ  
24ꢀ  
28ꢀ  
32ꢀ  
4ꢀ  
8ꢀ  
12ꢀ  
16ꢀ  
20ꢀ  
24ꢀ  
28ꢀ  
32ꢀ  
Load Resistance  
Load Resistance  
VDD vs. Output Power (RL=4ꢀ)  
VDD vs. Output Power (RL=8ꢀ)  
OUTPUT POWER vs. SUPPLY VOLTAGE(4ꢀ)  
OUTPUT POWER vs. SUPPLY VOLTAGE((8ꢀ)  
2.5  
2
3.5  
3
THD+N=10%  
THD+N=1%  
THD+N=10%  
THD+N=1%  
2.5  
2
1.5  
1
1.5  
1
0.5  
0.5  
0
0
2.0V  
2.5V  
3.7V  
4.2V  
5V  
5.5V  
2.0V  
2.5V  
3.7V  
4.2V  
5V  
5.5V  
VDD-Supply Voltage-V  
VDD-Supply 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
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
Output Power vs. Temperature  
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  
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
APPLICATION INFORMATION  
Bridged configuration explanation  
As shown in Figure 1 and 2, the LY8897 has two operational amplifiers internally, allowing for a few different  
amplifier configurations. The first amplifier’s gain is externally configurable, while the second amplifier is  
internally fixed in a unity-gain, inverting configuration. The closed-loop gain of the first amplifier is set by  
selecting the ratio of Rf to RIN while the second amplifier’s gain is fixed by the two internal 20kꢀ resistors.  
Figure 1 and 2 shows that the output of amplifier one serves as the input to amplifier two which results in both  
amplifiers producing signals identical in magnitude, but out of phase by 180°. Consequently, the differential  
gain for the IC is  
AVD= 2 X ( Rf / RIN ) ………………………………………………………………(1)  
By driving the load differentially through outputs Vo1 and Vo2, an amplifier configuration commonly referred to  
as “bridged mode” is established. Bridged mode operation is different from the classical single-ended  
amplifier configuration where one side of the load is connected to ground.  
A bridge amplifier design has a few distinct advantages over the single-ended configuration, as it provides  
differential drive to the load, thus doubling output swing for a specified supply voltage. Four times the output  
power is possible as compared to a single-ended amplifier under the same conditions.  
This increase in attainable output power assumes that the amplifier is not current limited or clipped. In order to  
choose an amplifier’s closed-loop gain without causing excessive clipping, please refer to the Audio Power  
Amplifier Design section.  
A bridge configuration, such as the one used in the LY8897, also creates a second advantage over single  
-ended amplifiers. Since the differential outputs, Vo1 and Vo2, are biased at half-supply, no net DC voltage  
exists across the load. This eliminates the need for an output coupling capacitor which is required in a single  
supply, single-ended amplifier configuration. Without an output coupling capacitor, the half-supply bias across  
the load would result in both increased internal IC power dissipation and also possible loudspeaker damage.  
Input Capacitors (Ci)  
The LY8897 input capacitors and input resistors form a high-pass filter with the corner frequency, fc,  
determined in equation Equation 2.  
1
fc = ----------------………………………………………………………………(2)  
2πRiCi  
Equation 3 is reconfigured to solve for the input coupling capacitance.  
1
Ci = -----------------…………………………………………………………….(3)  
2πRifc  
For example  
In the table 1 shows the external components. Rin in connect with Cin to create a high-pass filter.  
Table 1. Typical Component Values  
Reference  
Description  
Note  
Ri  
Ci  
20Kꢀ  
1% tolerance resistors  
0.47uF 80%/–20% non polarized  
0.1uF  
0.22uF  
0.33uF  
corner frequency 79.57Hz 36.17Hz 20.4Hz 16.93Hz  
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  
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
Ci = 1 / ( 2πRifc)  
Ci = 1 / ( 2π x20Kꢀ x20Hz)=0.1uF，One would likely choose a value of 0.1uF as this value is commonly used.  
Note that it is important to Ci must be 10 times smaller than the bypass capacitor to reduce clicking and  
popping noise from power on/off and entering and leaving shutdown. After sizing Ci for a given cutoff  
frequency, size the bypass capacitor to 10 times that of the input capacitor.  
Ci ≦ Cbypass / 10  
Bypass Capacitor Value Selection  
Besides minimizing the input capacitor size, careful consideration should be paid to value of Cbypass, the  
capacitor connected to the BYPASS pin. Since Cbypass determines how fast the LY8897 settles to quiescent  
operation, its value is critical when minimizing turn-on pops. The slower the LY8897’s outputs ramp to their  
quiescent DC voltage (nominally 1/2 VDD), the smaller the turn-on pop. Choosing Cbypass value equal 1.0 to  
10 uF along with a small value of Ci (in the range of 1 nF to 0.39 μF), produces a click-less and pop-less  
shutdown function. As discussed above, choosing Ci no larger than necessary for the desired bandwith helps  
minimize clicks and pops. Therefore, increasing the bypass capacitor reduces clicking and popping noise  
from power on/off and entering and leaving shutdown. To have minimal pop, Cbypass should be 10 times  
larger than Ci.  
Cbypass ≧ Ci x 10  
Table 2. CBYPASS Reference Component Values  
SYMBOL  
TEST CONDITION  
MIN.  
TYP.  
940  
550  
190  
158  
780  
480  
180  
126  
MAX. UNIT  
PARAMETER  
VDD=5.0V,  
Cbypass = 10μf  
Cbypass = 4.7μf  
Cbypass = 2.2μf  
-
-
-
-
-
-
-
-
-
-
-
Ci=0.1uF,  
Ri=20Kꢀ,  
Av=10  
Start-up time  
from shutdown  
C
bypass = 1.0μf  
-
ZI  
ms  
VDD=3.7V,  
Ci=0.1uF,  
Ri=20Kꢀ,  
Av=10  
Cbypass = 10μf  
Cbypass = 4.7μf  
Cbypass = 2.2μf  
Cbypass = 1.0μf  
-
-
-
-
Power Supply Bypassing Capacitor  
As with any amplifier, proper supply bypassing is critical for low noise performance and high power supply  
rejection. The capacitor location on both the bypass and power supply pins should be as close to the device  
as possible.  
The LY8897 is a mono class AB 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 ceramic capacitor or electrolytic capacitors,  
typically 10~220uF, placed as close as possible to the device VDD lead works best. Placing 0.1uF decoupling  
capacitor close to the LY8897 is very important for the efficiency of the class AB amplifier, because any  
resistance or inductance in the trace between the device and the capacitor can cause a loss in efficiency and  
protect device damage. 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.  
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  
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
Shutdown Function  
When the LY8897 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 LY8897 has a built-in over-heat protection circuit , it will turn off all power output when the chip  
temperature over 160℃, the chip will return to normal operation automatically after the temperature cool down  
to 130℃.  
PCB LAYOUT  
All the external components must place very close to the LY8897. The input resistors need to be very close to  
the LY8897 input pins so noise does not couple on the high impedance nodes between the input resistors and  
the input amplifier of the LY8897. Then place the decoupling capacitor Cs, close to the LY8897 is important  
for the efficiency of the class AB 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 LY8897 should be as wide as  
possible to minimize trace resistance. If these traces are too thin, the LY8897'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  
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
„
DEMO BOARD INFORMATION  
Demo Board Application Circuit :  
Figure 8. LY8897 Demo Board Application Circuit  
Demo Board BOM List :  
LY8897 V2.0 BOM List (Stereo Mode)  
No.  
Description  
Reference  
R1, R4A  
(R2,R3 DF input only)  
R5  
C1, C4  
Note  
1
2
3
Resistor, 20Kꢀ  
Resistor, 100Kꢀ  
Capacitor, 0.1uF  
1/16W,1%  
1/16W,1%  
80%/−20%, non polarized  
(C2 DF input only)  
4
Capacitor, 1.0uF  
C3  
80%/−20%, non polarized  
25V,105℃,8x11,EC Cap.  
LY8897X or LY8897U  
Pitch 2.54 mm  
5
6
7
Capacitor, 10.0uF  
IC  
1*2 Pin Header  
C5  
U1  
J1  
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  
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
Demo Board Artwork :  
Top Silkscreen  
Top Layer  
Composite view  
Bottom Layer  
(*3) When driving 4ꢀ loads from 4.2V~5V power supply, the device must be mounted to a circuit board.  
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  
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
PACKAGE OUTLINE DIMENSION  
8 Pin EMSOP 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  
®
LY8897  
2.7 Watt Audio Power Amplifier  
Rev. 1.1  
8 pin 25.6 mil MSOP 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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