®
Rev. 1.4
2.0Watt Audio Power Amplifier
GENERAL DESCRIPTION
The LY8892 is a 2.0W audio power amplifier. It is
capable of driving 4Ω speaker load at a continuous
average output of 2.0W with less than 10%
distortion (THD+N) from a 5.5V power supply and
8Ω speaker load at a continuous average output of
1.5W with less than 10% distortion (THD+N) from a
5.5V power supply.
The LY8892 primarily designed for high quality
application in other portable communication device.
And the LY8892 audio amplifier features low power
consumption shutdown mode. To facilitate this, The
shutdown function may be enabled by either logic
high or low depending on mode selection. Driving
the shutdown mode pin either high or low enables
the shutdown pin to be driven in a likewise manner
to enable shutdown.
And the LY8892 has an internal thermal shutdown
protection feature.
The LY8892 audio amplifier was designed
specifically to provide high quality output power with
a minimal amount of external components. The
LY8892 does not require output capacitors, and the
LY8892 is ideally suited for other low voltage
applications or portable electronic devices where
minimal power consumption is a primary
requirement.
LY8892
FEATURES
2.5V~5.5V Power supply.
Thermal shutdown Protection.
Low current shutdown mode
No output capacitors and networks or bootstrap
capacitors required
Low noise during turn-on and turn-off transitions
User selectable shutdown logic level.
(High or Low) (MSOP10 & DFN10 only)
Lead free and green package available.
(RoHS Compliant)
Space Saving Package
-- 8-pin MSOP package.
-- 8-pin DFN Package
-- 10-pin MSOP package.
-- 10-pin DFN 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
®
Rev. 1.4
2.0Watt Audio Power Amplifier
LY8892
PIN DESCRIPTION
SYMBOL
SHUTDOWN
Pin No.
MSOP8
1
2
--
3
4
5
--
6
7
8
DFN8
1
2
--
3
4
5
--
6
7
8
MSOP10
1
2
3
4
5
6
7
8
9
10
DFN10
1
2
3
4
5
6
7
8
9
10
Bypass pin
DESCRIPTION
Shutdown the device
Shutdown Mode Selectable
Positive Input
Negative Input
Negative output
No Connection
Power Supply
Ground
Positive Output
BYPASS
SD MODE
+IN
-IN
Vo1
NC
V
DD
GND
Vo2
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
®
Rev. 1.4
2.0Watt Audio Power Amplifier
LY8892
APPLICATION CIRCUIT
Figure 1.
Application Schematic with Single –Ended Input (DFN10 and MSOP10 package)
Figure 2.
Application Schematic with Differential Input (DFN10 and MSOP10 package)
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
®
Rev. 1.4
2.0Watt Audio Power Amplifier
LY8892
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
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
Resistor Output to GND
SYMBOL
I
DD
I
SD
V
SDIH
V
SDIL
V
SDIH
V
SDIL
V
OS
R
OUT-GND
TEST CONDITION
V
IN
= 0V, I
O
= 0A, 8
Ω
Load
V
SHUTDOWN
= V
SD Mode
V
SD Mode
= V
DD
V
SD Mode
= V
DD
V
SD Mode
= GND
V
SD Mode
= GND
MIN.
-
-
-
-
-
-
-
7.0
-
-
-
-
-
-
-
TYP.
5.0
0.1
1.5
1.3
1.5
1.3
7.0
8.5
1.0
1.4
1.4
1.8
2.0
0.13
62 (f =
217Hz)
66 (f =
1kHz)
145
170
1.0
MAX.
15.0
2.0
-
-
-
-
50.0
9.7
-
-
-
-
-
-
%
dB
W
UNIT
mA
µA
V
mV
k
Ω
Output Power
Total Harmonic Distortion+ Noise
Power Supply Rejection Ratio
Wake-up time
Thermal Shutdown Temperature
Shut Down Time
THD = 1%
, f = 1 kHz
R
L
=8Ω
THD = 10%
, f = 1 kHz
R
L
=8Ω
THD = 1%
, f = 1 kHz
Po
R
L
=4Ω
THD = 10%
, f = 1 kHz
R
L
=4Ω
THD = 10%
, f = 1 kHz
R
L
=4Ω (at 5.5V)
THD+N Po = 0.4 Wrms; f = 1kHz
Vripple = 200mV sine p-p
Input terminated with 10Ω
PSRR
to GND
T
WU
T
SD
T
SDT
Bypass Cap.=1.0uF, 5.0V
8
Ω
load
-
150
190
ms
℃
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
4
®
Rev. 1.4
2.0Watt Audio Power Amplifier
LY8892
DC ELECTRICAL CHARACTERISTICS (V
DD
=3V, T
A
=25℃)
PARAMETER
Power Supply Current
Shutdown Current
Shutdown Voltage Input High
Shutdown Voltage Input Low
Shutdown Voltage Input High
Shutdown Voltage Input Low
Output Offset Voltage
Resistor Output to GND
SYMBOL
I
DD
I
SD
V
SDIH
V
SDIL
V
SDIH
V
SDIL
V
OS
R
OUT-GND
TEST CONDITION
V
IN
= 0V, I
O
= 0A, 8
Ω
Load
V
SHUTDOWN
= = V
SD Mode
V
SD Mode
= V
DD
V
SD Mode
= V
DD
V
SD Mode
= GND
V
SD Mode
= GND
MIN.
-
-
-
-
-
-
-
7.0
-
-
-
-
-
-
TYP.
4.5
0.1
1.2
1.0
1.2
1.0
7.0
8.5
375
460
460
600
0.13
56 (f =
217Hz)
62 (f =
1kHz)
82
170
MAX.
14.0
2.0
-
-
-
-
50.0
9.7
-
-
mW
-
-
-
-
%
dB
UNIT
mA
µA
V
mV
k
Ω
Output Power
Total Harmonic Distortion+ Noise
Power Supply Rejection Ratio
Wake-up time
Thermal Shutdown Temperature
THD = 1% , f = 1 kHz
R
L
=8Ω
THD = 10% , f = 1 kHz
R
L
=8Ω
Po
THD = 1% , f = 1 kHz
R
L
=4Ω
THD = 10% , f = 1 kHz
R
L
=4Ω
THD+N Po = 0.25 W
rms
, f = 1kHz
V
ripple
= 200mV sine p-p
Input terminated with 10Ω
PSRR
to GND
T
WU
T
SD
-
150
190
ms
℃
ORDERING INFORMATION
LY 8 892 VV
V : Package Type
BL：8-Pin DFN
；BB：10-Pin
DFN
UL：8-Pin MSOP
；UB：10-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
5
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