®
LY8895
Rev. 1.4
1.4 Watt Audio power Amplifier
GENERAL DESCRIPTION
The LY8895 is a 1.4 Watt audio power amplifier. And
the LY8895 primarily designed for high quality
application in other portable communication device.
It is capable of driving 8
Ω
speaker load at a
continuous average output of 1.4W / 10% distortion
(THD+N) from a 5.0V power supply.
A feature of the LY8895 amplifier to switch BTL
mode and headphone mode (single-ended) is
accomplished using the headphone sense pin. And
the LY8895 audio amplifier features low power
consumption shutdown mode. It is achieved by
driving the shutdown pin with logic low. B
esides
the
LY8895 has an internal thermal shutdown protection
feature.
The LY8895 amplifier was designed specifically to
provide high quality output power with a minimal
amount of external components. The LY8895 does
not require output capacitors, and the LY8895 is
ideally suited for other low voltage applications or
portable electronic devices where minimal power
consumption is a primary requirement.
FEATURES
2.5V~5.5V Power supply.
Thermal shutdown Protection.
Low current shutdown mode
No capacitors and networks or bootstrap
capacitors required
Low noise during turn-on and turn-off transitions
Headphone amplifier mode.
Lead free and green package available.
(RoHS Compliant)
Space Saving Package
-- 8-pin MSOP package.
APPLICATION
Portable electronic devices
Mobile Phones
PDAs
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
®
LY8895
Rev. 1.4
1.4 Watt Audio power Amplifier
PIN DESCRIPTION
SYMBOL
SHUTDOWN
PIN No.
MSOP
1
2
3
4
5
6
7
8
Bypass pin
Headphone sense pin
Negative input
Negative output
Power supply
Ground
Positive output
DESCRIPTION
Shutdown the device.(when low level is active the pin)
BYPASS
HP SENSE
-IN
Vo1
V
DD
GND
Vo2
APPLICATION CIRCUIT
Figure 1.
Audio Amplifier 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
2
®
LY8895
Rev. 1.4
1.4 Watt Audio power Amplifier
ABSOLUTE MAXIMUN RATINGS*
PARAMETER
Supply Voltage
Operating Temperature
Input Voltage
Storage Temperature
Power Dissipation
ESD Susceptibility
Junction Temperature
Soldering Temperature (under 10 sec)
SYMBOL
V
DD
T
A
V
I
T
STG
P
D
V
ESD
T
JMAX
T
SOLDER
RATING
6.0
-40 to 85 (I grade)
-0.3V to V
DD
+0.3V
-65 to 150
Internally Limited
2000
150
260
UNIT
V
℃
V
℃
W
V
℃
℃
DC ELECTRICAL CHARACTERISTICS (V
DD
=5V, T
A
=25℃)
PARAMETER
Power Supply Current
Shutdown Current
HP Sense high input voltage
HP Sense low input voltage
Wake-up time
Output Offset Voltage
SYMBOL
I
DD
I
SD
V
IH
V
IL
T
WU
V
OS
TEST CONDITION
V
IN
= 0V, I
O
= 0A, No Load
V
IN
= 0V, I
O
= 0A, 8
Ω
Load
V
SHUTDOWN
= 0V
MIN.
-
-
-
0.8xV
DD
-
-
-
TYP.
3.5
4.0
0.1
-
-
176
7.0
1.4
MAX. UNIT
9.0
mA
10.0
mA
2.0
µA
-
V
0.2xV
DD
V
ms
50.0
mV
W
Bypass cap. = 1.0uF
Output Power
Total Harmonic Distortion+ Noise
Power Supply Rejection Ratio
THD = 10% , f = 1 kHz
R
L
= 8Ω,
HP Sense < 0.2xV
DD
THD = 1% , f = 1 kHz
Po
R
L
= 8Ω,
HP Sense < 0.2xV
DD
THD = 1% (max), f = 1kHz,
R
L
= 32Ω,
HP Sense > 0.8xV
DD
THD+N Po = 0.4 Wrms; f = 1kHz
PSRR Vripple = 200mV sine p-p
Input terminated with 10Ω
to GND
T
SD
T
SDT
8
Ω
load
-
1.0
W
-
-
-
90
0.13
62 (f =
217Hz)
66 (f =
1kHz)
170
1.0
mW
%
dB
-
Thermal Shutdown Temperature
Shut Down Time
150
190
℃
ms
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
®
LY8895
Rev. 1.4
1.4 Watt Audio power Amplifier
DC ELECTRICAL CHARACTERISTICS (V
DD
=3V, T
A
=25℃)
PARAMETER
Power Supply Current
Shutdown Current
HP Sense high input voltage
HP Sense low input voltage
Output Offset Voltage
Wake-up time
SYMBOL
I
DD
I
SD
V
IH
V
IL
V
OS
T
WU
TEST CONDITION
V
IN
= 0V, I
O
= 0A, No Load
V
IN
= 0V, I
O
= 0A, 8
Ω
Load
V
SHUTDOWN
= 0V
MIN.
-
-
-
0.8xV
DD
-
-
-
TYP.
3.0
3.5
0.1
-
-
7.0
114
0.46
MAX. UNIT
8.0
mA
9.0
mA
2.0
µA
-
V
0.2xV
DD
V
50.0
mV
ms
W
Output Power
Total Harmonic Distortion+ Noise
Power Supply Rejection Ratio
THD = 10% , f = 1 kHz
R
L
= 8Ω,
HP Sense < 0.2xV
DD
THD = 1% , f = 1 kHz
Po
R
L
= 8Ω,
HP Sense < 0.2xV
DD
THD = 1% (max), f = 1kHz,
R
L
= 32Ω,
HP Sense > 0.8xV
DD
THD+N Po = 0.25 W
rms
, f = 1kHz
PSRR V
ripple
= 200mV sine p-p
Input terminated with 10Ω
to GND
T
SD
-
0.375
W
-
-
-
35
0.13
56 (f =
217Hz)
62 (f =
1kHz)
170
-
-
mW
%
dB
Thermal Shutdown Temperature
150
190
℃
ORDERING INFORMATION
LY 8 895 VV
V : Package Type
UL：8-Pin MSOP
Product Name
A : Product Line
LY : Lyontek Product Number Prefix
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
®
LY8895
Rev. 1.4
1.4 Watt Audio power Amplifier
PACKAGE OUTLINE DIMENSION
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
5
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