®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
FEATURES
GENERAL DESCRIPTION
1.4 W Into 8Ω from 5V power supply at
THD = 10% (Typ).
2.5V~5.5V power supply.
Low shutdown current.
Low quiescent current.
Minimum external components.
No output filter required for inductive loads.
Output Pin Short-Circuit Protection (Short to
Output Pin, Short to GND, Short to VCC)
Low noise during turn-on and turn-off transitions.
Easy upgrade Class AB (LY8990/LY8891)
to Class D (Pin to Pin Replace).
Lead free and green package available.
(RoHS Compliant)
Space Saving Package
- 8-pin MSOP package.
- 8-pin DFN package
The LY8006 is a high efficiency, 1.4 W 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 LY8006 is designed to meet of portable
electronic devices. The LY8006 is a single 5V
supply, it is capable of driving 8Ω speaker load at a
continuous average output of 1.4 W with 10%
THD+N. The LY8006 has high efficiency with
speaker loads compared to a typical Class AB
amplifier. With a 3.6V supply driving an 8Ω speaker,
the LY8006 efficiency for a 400mW power level is
88%.
In cellular handsets, the earpiece, speaker phone,
and melody ringer can each be driven by the
LY8006.The gain of the LY8006 is externally
configurable which allows independent gain control
from multiple sources by summing the signals.
Output pin short circuit ( short to output pin, short to
ground and short to VDD ) protection prevent the
device from damage during fault conditions.
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
®
LY8006
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
Rev. 1.7
PIN DESCRIPTION
SYMBOL
Pin No.
DESCRIPTION
MSOP
DFN
SHUTDOWN
1
1
Shutdown the device.(when low level is active the pin)
BYPASS
2
2
Bypass pin
NC
3
3
No Internal connection
-IN
4
4
Negative input
Vo1
5
5
Positive BTL output
VDD
6
6
Power supply
GND
7
7
Ground
Vo2
8
8
Negative BTL output
ORDERING INFORMATION
LY 8 006 VV
V : Package Type
UL : 8-Pin MSOP
BL : 8-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
FAX: 886-3-6668836
2
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
APPLICATION CIRCULT
Figure 1. Application Schematic With Single-Ended Input Configuration
Single-End Input With Pre-Amplifier Gain = (150 KΩ / 5 KΩ) * 2 = 60
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
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
Figure 2. Application Schematic With Single-Ended Input Configuration
Single-End Input With Pre-Amplifier Gain = [150 KΩ / ( 5 KΩ+ Ri )] * 2
ABSOLUTE MAXIMUN RATINGS
PARAMETER
Supply Voltage
Operating Temperature
Input Voltage
Storage Temperature
Power Dissipation
ESD Susceptibility
Junction Temperature
Soldering Temperature (under 10 sec)
SYMBOL
VDD
RATING
6.0
UNIT
V
TA
-40 to 85 ( I grade)
℃
VI
TSTG
PD
VESD
TJMAX
TSOLDER
-0.3V to VDD +0.3V
-65 to 150
Internally Limited
2000
150
260
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
4
W
V
℃
℃
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
ELECTRICAL CHARACTERISTICS (TA = 25℃,Unless otherwise noted)
TEST CONDITION
VI = 0 V, Av = 2 V/V,
|VOS|
VDD = 2.5 V to 5.5 V
|IIH|
VDD = 5.5 V, VI = 5.8 V
|IIL|
VDD = 5.5 V, VI = 0.3 V
PSRR VDD = 2.5 V to 5.5 V
VDD = 5.5V, No Load
Quiescent Current
IQ
VDD = 3.6V, No Load
VDD = 2.5V, No Load
VSHUTDOWN ≦0.8V,
Shutdown Current
ISD
VDD = 2.5V to 5.5V
VDD= 2.5V to 5.5V
Total Gain (*)
RL = 8Ω
(*)The audio amplifier’s gain is determined by：
PARAMETER
Output offset voltage
(measured differentially)
High-level input current
Low-level input current
Power supply rejection ratio
SYMBOL
MIN.
TYP.
MAX.
UNIT
-
-
25
mV
-
100
5
-55
4.5
3.2
uA
uA
dB
-
-75
3.4
2.8
2.2
-
0.3
2
mA
µA
[300KΩ / (5KΩ+Ri)] x2
(TYP.)
V/V
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.
OPERATING CHARACTERISTICS (TA = 25℃, Gain = 2V/V, RL = 8Ω, Unless otherwise noted)
PARAMETER
Out Power
SYMBOL
TEST CONDITION
VDD=2.5V
MIN.
-
TYP.
1.55
0.79
0.36
1.2
0.6
0.3
MAX.
-
VDD=5V
-
0.2
-
VDD=3.6V
-
0.18
-
VDD=2.5V
-
0.15
-
VDD=3.6V
-
-56
-
dB
VDD=5V
-
97
-
dB
48
-
THD+N= 10%, f = 1 kHz,
RL= 8Ω
VDD=5.0V
THD+N= 1%, f = 1 kHz,
RL= 8Ω
VDD=5.0V
Po
PO = 1 W, f = 1 kHz,
RL = 8Ω
PO = 0.5 W, f = 1 kHz,
Total harmonic distortion + noise THD+N
RL = 8Ω
PO = 0.2 W, f = 1 kHz,
RL = 8Ω
f = 217 Hz,
V(RIPPLE) = 200mVpp,
Supply ripple rejection ratio
KSVR
inputs ac-grounded
with Ci = 2uF
Signal-to-noise ratio
SNR PO= 1 W, RL = 8Ω
VDD = 3.6 V,
f = 20 Hz to 20 kHz,
Output voltage noise
Vn
Inputs ac-grounded with
Ci = 2 μF
Start-up time from shutdown
ZI
VDD = 3.6 V
VDD=3.6V
VDD=2.5V
VDD=3.6V
No
weighting
A
weighting
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
-
36
110
-
UNIT
W
%
uVRMS
ms
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
TYPICAL PERFORMANCE CHARACTERISTICS
Figure 3
Total Harmonic Distortion + Noise vs Output Power
Figure 4
Total Harmonic Distortion + Noise vs Frequency
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
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
Figure 5
Efficiency vs Output power ( RL=8Ω, 33μH)
Figure 6
Power dissipation vs Output power ( RL=8Ω, 33μH)
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
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
Figure 7
Supply Current vs Output Power ( RL=8Ω, 33μH)
Figure 8
Output Power vs Load Resistance (Po at 10 % THD with f = 1 kHz)
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
®
LY8006
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
Rev. 1.7
Figure 9
Output Power vs Load Resistance (Po at 1 % THD with f = 1 kHz)
Figure 10
THD+N & Output Power vs Temperature (VDD=3V, RL=8Ω)
100
TH D +N (% )
10
1
0.1
25C
80C
85C
-20C
-40C
0.01
0.001
0.01
0.1
Po-O utput Pow er (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
9
1
®
LY8006
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
Rev. 1.7
Figure 11
THD+N & Output Power vs Temperature (VDD=4.5V, RL=8Ω)
100
THD+N (%)
10
1
25C
80C
0.1
85C
-20C
-40C
0.01
0.001
0.01
0.1
1
10
Po-O utput Pow er (W )
Figure 12
THD+N & Output Power vs Temperature (VDD=5.0V, RL=8Ω)
100
THD +N (% )
10
1
0.1
25C
80C
85C
-20C
-40C
0.01
0.001
0.01
0.1
Po-O utput Pow er (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
1
10
®
LY8006
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
Rev. 1.7
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 LY8006 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 LY8006 to operate at its best,
For example
Table 1. Typical Total Gain and AVD Values
Rf (KΩ)
150
150
150
150
150
150
Ri (KΩ)
300
150
100
75
50
37.5
Pre AMP. Gain
1
2
3
4
6
8
Total Gain
2
4
6
8
12
16
AVD (db)
6.02
12.04
15.56
18.06
21.58
24.08
Input Capacitors (Ci)
The LY8006 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
11
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
For example
In the table 2 shows the external components. Rin in connect with Cin to create a high-pass filter.
Table 2. Typical Component Values
Reference
Description
Note
Ri
150KΩ
1% tolerance resistors
Ci
0.22uF
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 )
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
®
LY8006
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
Rev. 1.7
Figure 7. Application Schematic With Two Single-Ended Inputs Configuration
PCB Layout
All the external components must place very close to the LY8006. The input resistors need to be very close to
the LY8006 input pins so noise does not couple on the high impedance nodes between the input resistors and
the input amplifier of the LY8006. Then place the decoupling capacitor Cs, close to the LY8006 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 LY8006 should be as wide as
possible to minimize trace resistance. If these traces are too thin, the LY8006'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
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
LY8006UL/LY8006BL Demo Board Artwork
Top Silkscreen
Top Layer
Composite view
Bottom Layer
LY8006 V1.1 BOM List
No.
Description
Reference
1
Resistor, 100KΩ
R2,R3
2
Capacitor, 0.39uF
C2
3
Capacitor, 0.1uF
C3
4
Capacitor, 10.0uF
C4
5
Capacitor, 1.0uF
C5
6
1*2 Pin Header
J1
7
NC
R1,C1,J2
Note
Close Æ Active
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
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
PACKAGE OUTLINE DIMENSION
8 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
FAX: 886-3-6668836
15
®
LY8006
Rev. 1.7
1.4 W Mono Filterless Class D Audio power Amplifier (MSOP / DFN)
－Compatible with LY8890/8891/8891B Single-Ended Input
8 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
FAX: 886-3-6668836
16