Lyontek LY8602UL Dual 2.0w/ch stereo audio amplifier Datasheet

®
LY8602
Rev. 1.3
Dual 2.0W/CH Stereo Audio Amplifier
FEATURES
GENERAL DESCRIPTION
2.5V~5.5V Power supply.
Thermal shutdown Protection.
Low current shutdown mode
Low noise during turn-on and turn-off transitions.
Support “Click and pop” suppression circuitry
Lead free and green package available.
(RoHS Compliant)
„ Space Saving Package
-- MSOP 10 pin Package.
-- DFN 10 pin Package.
The LY8602 is a dual stereo audio power amplifier.
It is capable of driving 4 Ω speaker load at a
continuous average output of 2.0W / 10% distortion
(THD+N) from a 5.5V power supply. TheLY8602
primarily designed for high quality output power
from application in other portable communication
device and portable device.
The LY8602 audio amplifier features low power
consumption in shutdown mode. It is achieved by
driving the shutdown pin with logic low. And the
LY8602 has an internal thermal shutdown protection
feature.
To simplify audio system design of the LY8602. It is
ideally suited for other low voltage applications or
portable electronic devices where minimal power
consumption is a primary requirement.
„
„
„
„
„
„
APPLICATION
„ Portable and desktop computers
„ Multimedia Monitors
„ Portable Audio System
PIN CONFIGURATION
LY8602 MSOP10 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
1
FAX: 886-3-6668836
®
LY8602
Rev. 1.3
Dual 2.0W/CH Stereo Audio Amplifier
LY8602 DFN10 Pin Configuration (Top View)
PIN DESCRIPTION
SYMBOL
Pin No.
DESCRIPTION
MSOP
DFN
SHUTDOWN
1
1
Shutdown control.(when low level is active the pin)
BYPASS
2
2
Bypass Pin
+OUTA
3
3
Positive BTL output of A channel.
-OUTA
4
4
Negative BTL output of A channel.
-INA
5
5
Negative Input of A channel.
-INB
6
6
Negative Input of B channel.
-OUTB
7
7
Negative BTL output of B channel.
VDD
8
8
Power Supply
+OUTB
9
9
Positive BTL output of B channel.
GND
10
10
Ground
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
2
FAX: 886-3-6668836
®
LY8602
Rev. 1.3
Dual 2.0W/CH Stereo Audio Amplifier
TYPICAL APPLICATION CIRCUIT
Figure 1. LY8602 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
3
FAX: 886-3-6668836
®
LY8602
Rev. 1.3
Dual 2.0W/CH Stereo Audio Amplifier
ABSOLUTE MAXIMUN RATINGS*
PARAMETER
Supply Voltage
Operating Temperature
Input Voltage
Storage Temperature
Power Dissipation
ESD Susceptibility
Junction Temperature
Soldering Information
SYMBOL
VDD
TA
VI
TSTG
PD
VESD
TJMAX
Vapor Phase (60 sec.)
Infrared (15 sec.)
RATING
6.0
-40 to 85 (I grade)
-0.3V to VDD +0.3V
-65 to 150
Internally Limited
2000
150
215
220
UNIT
V
℃
V
℃
W
V
℃
℃
DC ELECTRICAL CHARACTERISTICS (VDD=5V, TA=25℃)
PARAMETER
SYMBOL
Power Supply Current
IDD
Shutdown Current
Shutdown High Input Voltage
Shutdown Low Input Voltage
Wake-up time
Output Offset Voltage
ISD
VIH
VIL
TWU
VOS
TEST CONDITION
VIN = 0V, IO = 0A,
8Ω Load (BTL)
VSHUTDOWN = 0V
Bypass cap.=1.0uF
THD = 1%, f = 1 kHz,
RL=8Ω
THD = 10%, f = 1 kHz
RL=8Ω
THD = 1%, f = 1 kHz
Output Power
Po
RL=4Ω
THD = 10%, f = 1 kHz
RL=4Ω
THD = 10%, f = 1 kHz
RL=4Ω (at 5.5V)
Po = 0.4 Wrms; f = 1kHz,
Total Harmonic Distortion+ Noise THD+N
RL=8Ω
Vripple = 200mV sine p-p
Input terminated with 10Ω
Power Supply Rejection Ratio
PSRR
to GND
Thermal Shutdown Temperature
Shutdown Time
TSD
TSDT
MIN.
TYP.
MAX.
UNIT
-
8.5
21.0
mA
1.4
-
0.3
172
7.0
2.0
0.4
50.0
µA
V
V
ms
mV
1.1
1.4
1.4
-
1.8
-
2.0
-
0.11
150
8 Ω load
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
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FAX: 886-3-6668836
62 (f =
217Hz)
66 (f =
1kHz)
170
1.0
W
%
-
dB
190
℃
ms
®
LY8602
Rev. 1.3
Dual 2.0W/CH Stereo Audio Amplifier
DC ELECTRICAL CHARACTERISTICS (VDD=3V, TA=25℃)
PARAMETER
SYMBOL
Power Supply Current
IDD
Shutdown Current
Shutdown High Input Voltage
Shutdown Low Input Voltage
Wake-up time
Output Offset Voltage
ISD
VIH
VIL
TWU
VOS
TEST CONDITION
VIN = 0V, IO = 0A,
8Ω Load (BTL)
VSHUTDOWN = 0V
MIN.
TYP.
MAX.
UNIT
-
6.3
15.5
mA
1.4
-
0.1
82
7.0
2.0
0.4
50
µA
V
V
ms
mV
Bypass cap.=1.0uF
THD = 1%, f = 1 kHz,
RL=8Ω
THD = 10%, f = 1 kHz
RL=8Ω
Output Power
Po
THD = 1%, f = 1 kHz
RL=4Ω
THD = 10%, f = 1 kHz
RL=4Ω
Po = 0.2 Wrms; f = 1kHz,
Total Harmonic Distortion+ Noise THD+N
RL=8Ω
Vripple = 200mV sine p-p
Input terminated with 10Ω
Power Supply Rejection Ratio
PSRR
to GND
Thermal Shutdown Temperature
Shutdown Time
TSD
TSDT
0.37
0.46
W
0.46
-
0.6
-
0.12
150
8 Ω load
56 (f =
217Hz)
62 (f =
1kHz)
170
1.0
ORDERING INFORMATION
LY 8 602 VV
V : Package Type
UL : 10-PIN MSOP
BL : 10-PIN DFN
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
5
FAX: 886-3-6668836
%
-
dB
190
℃
ms
®
LY8602
Rev. 1.3
Dual 2.0W/CH Stereo Audio Amplifier
APPLICATION INFORMATION
POWER SUPPLY BYPASSING
As with any power amplifier, proper supply bypassing is critical for low noise performance and high power
supply rejection. Applications that employ a 5V regulator typically use a 10 μF in parallel with a 0.1 μF filter
capacitor to stabilize the regulator’s output, reduce noise on the supply line, and improve the supply’s
transient response. However, their presence does not eliminate the need for a local 1.0 μF tantalum bypass
capacitance connected between the LY8602’s supply pins and ground. Do not substitute a ceramic capacitor
for the tantalum. Doing so may cause oscillation. Keep the length of leads and traces that connect capacitors
between the LY8602’s power supply pin and ground as short as possible.
MICRO-POWER SHUTDOWN
The voltage applied to the SHUTDOWN pin controls the LY8602’s shutdown function. Activate micro-power
shutdown by applying GND to the SHUTDOWN pin. When active, the LY8602’s micro-power shutdown
feature turns off the amplifier’s bias circuitry, reducing the supply current. The low 0.1 μA typical shutdown
current is achieved by applying a voltage that is as near as GND as possible to the SHUTDOWN pin.
Bypass Capacitor Value Selection
Besides minimizing the input capacitor size, careful consideration should be paid to value of C3, the capacitor
connected to the BYPASS pin. Since C3 determines how fast the LY8602 settles to quiescent operation, its
value is critical when minimizing turn-on pops. The slower the LY8602’s outputs ramp to their quiescent DC
voltage (nominally 1/2 VDD), the smaller the turn-on pop. Choosing C6 equal to 1.0 μF along with a small
value of C1,C2 (in the range of 0.1 μF to 0.39 μF), produces a click-less and pop-less shutdown function. As
discussed above, choosing C1,C2 no larger than necessary for the desired bandwith helps minimize clicks
and pops.
OPTIMIZING CLICK AND POP REDUCTION PERFORMANCE
The LY8602 contains circuitry that minimizes turn-on and shutdown transients or “clicks and pop”. For this
discussion, turn-on refers to either applying the power supply voltage or when the shutdown mode is
deactivated. When the part is turned on, an internal current source changes the voltage of the BYPASS pin in
a controlled, linear manner. Ideally, the input and outputs track the voltage applied to the BYPASS pin. The
gain of the internal amplifiers remains unity until the voltage on the bypass pin reaches 1/2 VDD. As soon as
the voltage on the bypass pin is stable, the device becomes fully operational. Although the BYPASS pin
current cannot be modified, changing the size of C3 alters the device’s turn-on time and the magnitude of
“clicks and pops”. Increasing the value of C3 reduces the magnitude of turn-on pops. However, this presents
a tradeoff: as the size of C3 increases, the turn-on time increases. There is a linear relationship between the
size of C3 and the turn-on time. Here are some typical turn-on times for various values of C3:
In order eliminate “clicks and pops”, all capacitors must be discharged before turn-on. Rapidly switching VDD
on and off may not allow the capacitors to fully discharge, which may cause “clicks and pops”. In a single
-ended configuration, the output is coupled to the load by C1,C2. This capacitor usually has a high value.
C1,C2 discharges through internal 20kΩ resistors. Depending on the size of C1,C2, the discharge time
constant can be relatively large. To reduce transients in single-ended mode, an external 1kΩ - 5kΩ resistor
can be placed in parallel with the internal 20kΩ resistor. The tradeoff for using this resistor is increased
quiescent current.
TABLE 2. C3 and TON Truth Table
C3
TON (Typ.) at 5.0V
1.0uF
172 ms
0.47uF
76 ms
0.33uF
60 ms
0.22uF
50 ms
0.1uF
36 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
6
FAX: 886-3-6668836
®
LY8602
Rev. 1.3
Dual 2.0W/CH Stereo Audio Amplifier
PACKAGE OUTLINE DIMENSION
10-Pin 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
7
FAX: 886-3-6668836
®
LY8602
Rev. 1.3
Dual 2.0W/CH Stereo Audio Amplifier
10-Pin DFN 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
8
FAX: 886-3-6668836
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