Post on 28-Jan-2023
AW8155 July 2018 V1.1
www.awinic.com.cn 1 Copyright © 2018 SHANGHAI AWINIC TECHNOLOGY CO., LTD
Non-Crack-Noise, Ultra-Low-EMI, TDD Suppression Second Generation Class-D Audio Amplifier
FEATURES
Ultra low THD+N:0.06%
AB/D operate mode
Two NCN level:0.65w and0.85w
TDD suppression
EEE Function, Greatly reduces EMI over the
full bandwidth
Excellent Pop-Click Supression
Pin compatible with AW8145
No VREF capacitor
One-pulse control
Filter-Free Class-D Architecture
High PSRR (-70dB at 217Hz)
Low Shutdown Current (<0.1A)
Power Supply Range: 2.5V~5.5V
Over-Current Protection
Over-Temperature Protection
Small 1.5mm×1.5mm FC-9 Package
APPLICATIONS
Cellular Phones
MP3/PMP
GPS
Digital Photo Frame
GENERAL DESCRIPTION
The AW8155 is a non-crack-noise (NCN), ultra-low-EMI, filter-free, AB/D output mode selec-tion, second generation Class-D audio ampli-fier. Ultra low THD+N,Unique NCN function, which adjusts the system gain automatically while detecting the “Crack” distortion of output signal, protects the speaker from damage at high power levels and brings the most comfort-able listening experience to the customers.
AW8155 NCN output power can be set to 0.65w or 0.85w for different speakers, this fea-ture is embedded in order to protect speakers from damage caused by an excessive sound level.
The AW8155 features a unique RNS and net au-dio technology, which effectively reduces RF en-ergy, attenuate the RF TDD-noise, an acceptable audible level to the customer.
The AW8155 features the EEE (Enhanced Emission Elimination) function which greatly re-duces EMI over the full bandwidth. The AW8155 achieves better than 20dB margin un-der FCC limits with 24 inch of cable.
The filter-free PWM architecture and internal gain setting reduces external components count, board area consumption, system cost and simplifies the design. The over-current, over-temperature is prepared inside of the de-vice.
The AW8155 is available in an ultra small 1.5mm×1. 5mm FC-9 package. The AW8155 is specified over the industrial temperature range
of -40℃ to +85℃.
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PIN CONFIGURATION AND TOP MARK
INN
CTRL
AGND
AGND
PGNDVOP
VDD
INP1
2
3
A B C
VON
1
2
3
A B C
A55XXX
A55 – AW8155FCRXXX - Manufacture Date Code
AW8155FCR MARKINGAW8155FCR TOP VIEW
Pin Configuration and Top Mark of AW8155
PIN DEFINITION
No. Symbol Description
A1 INP Positive audio input
A2 VDD Power Supply
A3 VOP Positive audio output
B1 AGND Analog ground
B2 AGND Analog ground
B3 PGND Power ground
C1 INN Negative audio input
C2 CTRL Shutdown and NCN control pin
C3 VON Negative audio output
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TYPICAL APPLICATION
VON
INP
AGND
VDD
VOPINN
PGND
Cs1μF
AW8155CTRL
Cin 33nF
Cin 33nF
GPIO
10k
AW8155 Application Schematic With Differential Input
VON
INP
AGND
VDD
VOPINN
PGND
Cs1μF
AW8155CTRL
Cin 33nF
Cin 33nF
GPIO
10k
AW8155 Application Schematic With Single-Ended Input
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ORDERING INFORMATION
Part Number Temperature Package Marking
Moisture Sensitivity
Level
Environ-mental
Information
Packing Type
AW8155FCR -40℃~85℃ FCQFN
1.5*1.5-9L A55 MSL3 ROHS+HF
3000 units/Tape and Reel
AW8155
ShippingR: Tape & Reel
Package TypeFC: FCQFN
ABSOLUTE MAXIMUM RATINGS(1)
Parameter Unit
Supply voltage VDD -0.3V to 6V
Input Voltage -0.3V to VDD+0.3V
Package Thermal Resistance θJA(2) 90℃/W
Operating free-air temperature -40℃ to 85℃
Maximum Junction Temperature TJMAX 125℃
Storage Temperature Range TSTG -65℃ to 150℃
Lead Temperature (Soldering 10 Seconds) 260℃
ESD Rating(3)
HBM(human body model) ±8KV
Latch-up
Test Condition :JEDEC STANDARD NO.78B DECEMBER 2008 +IT:450mA
-IT:-450mA
note1: Stresses beyond those listed under "absolute
maximum ratings" may cause permanent damage to the
device. These are stress ratings only and functional oper-
ation of the device at these or any other conditions beyond
those indicated under "recommended operating condi-
tions" is not implied. Exposure to absolute-maximum-rated
conditions for extended periods may affect device reliabil-
ity.
note2: For the 9-Pin Flip-Chip CSP package, the θJA is
highly dependent of the PCB Heatsink area. For example,
θJA can equal 195°C/W with 50 mm2 total area and also
135°C/W with 500 mm2. When using ground and power
planes, the value is around 90°C/W, as specified in table.
note3: The human body model is a 100pF capacitor discharged through a 1.5kΩ resistor into each pin. Test method: MIL-STD-883G Method 3015.7. a
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OPERATE MODE DESCRIPTION
mode CTRL operating AV
(V/V)
NCN power
(W)
RNS Net audio
mode1 Class_D 8 0.65 √
mode 2 Class_D 12 0.85 √
mode 3 Class_D 12 0.85 √ √
mode 4 Class_AB 12 √
ELECTRICAL CHARACTERISTICS
Test Condition: TA=25℃(Unless otherwise specified)
Parameter Conditions Min Typ Max Units
VDD Power supply voltage 2.5 5.5 V
VIH CTRL high input voltage 1.3 VDD V
VIL CTRL low input voltage 0 0.35 V
|VOS| Output offset voltage Vin=0v,VDD=2.5V to 5.5V -40 0 40 mV
ISD Shutdown current VDD=3.6V,CTRL =0V 0.1 1 μA
fSW Modulation Frequency VDD=2.5V to 5.5V 600 800 1000 kHz
TSD Thermal Protect level 140 160 170 ℃
TSDR Thermal Hysteresis 100 120 130 ℃
TON Start-up time 30 40 50 ms
Rini Internal impedance 20 28.5 35 kΩ
PO Output power
THD+N=10%,f=1kHz,RL=4Ω,VDD=5V 2.61 W
THD+N=1%,f=1kHz,RL=4Ω,VDD=5V 2.11 W
THD+N=10%,f=1kHz,RL=8Ω,VDD=5V 1.63 W
THD+N=1%,f=1kHz,RL=8Ω,VDD=5V 1.32 W
THD+N=10%,f=1kHz,RL=4Ω,VDD=4.2V 1.79 W
THD+N=1%,f=1kHz,RL=4Ω,VDD=4.2V 1.46 W
THD+N=10%,f=1kHz,RL=8Ω,VDD=4.2V 1.13 W
THD+N=1%,f=1kHz,RL=8Ω,VDD=4.2V 0.92 W
THD+N=10%,f=1kHz,RL=4Ω,VDD=3.6V 1.28 W
THD+N=1%,f=1kHz,RL=4Ω,VDD=3.6V 1.05 W
THD+N=10%,f=1kHz,RL=8Ω,VDD=3.6V 0.82 W
THD+N=1%,f=1kHz,RL=8Ω,VDD=3.6V 0.65 W
Mode 1
Iq Quiescent current VDD=3.6V,no vin, no load 4.3 mA
η Efficiency VDD=3.6V,Po=0.8W,RL=8Ω 80 86 %
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Av Voltage gain Cin=33nF,rin=0 7 8 9 V/V
PSRR Power suppression ration VDD=4.2V,Vp-p_sin=200mV 217Hz -55 -72 dB
1kHz -55 -69 dB
THD+N Total harmonic distortion plus noise
VDD=4.2V,Po=0.5W,RL=8Ω,f=1kHz 0.06 0.1 %
VDD=3.6V,Po=0.25W,RL=8Ω,f=1kHz 0.06 0.1 %
PO NCN NCN output power f=1kHz,RL=8Ω,VDD=4.2V 0.65 W
TAT Attack time(-11dB) 32 ms
TRL Release time(11dB) 2 s
AMAX Max attenuation -10 -11 -12 dB
Vn Speaker Output noise VDD=3.6V, Cin=33nF,Rin=0, RL = 8 Ω
f=20Hz-20kHz,input AC grounded 100 μV
SNR Signal-to-noise ratio VDD = 5 V, PO = 1 W, RL = 8Ω 92 dB
Mode 2
Iq Quiescent current VDD=3.6V,no load 4.3 mA
η Efficiency VDD=3.6V,Po=0.8W,RL=8Ω 80 86 %
Av Voltage gain Cin=33nF 11 12 13 V/V
PSRR Power suppression ration VDD=4.2V,Vp-p_sin=200mV 217Hz 55 -71 dB
1kHz 55 -70 dB
THD+N Total harmonic distortion plus noise
VDD=4.2V,Po=0.5W,RL=8Ω,f=1kHz 0.06 0.1 %
VDD=3.6V,Po=0.25W,RL=8Ω,f=1kHz 0.06 0.1 %
PO NCN NCN output power f=1kHz,RL=8Ω,VDD=4.2V 0.85 W
TAT Attack time(-11dB) 40 ms
TRL Release time(11dB) 2.6 s
AMAX Max attenuation -11 -13.5 -15 dB
Vn Speaker Output noise VDD=3.6V, Cin=33nF,Rin=0, RL = 8 Ω
f=20Hz-20kHz,input AC grounded 140 μV
SNR Signal-to-noise ratio VDD = 5 V, PO = 1 W, RL = 8Ω 89 dB
Mode 3
Iq Quiescent current VDD=3.6V,no vin, no load 4.3 mA
η Efficiency VDD=3.6V,Po=0.8W,RL=8Ω 80 86 %
Av Voltage gain Cin=33nF 11 12 13 V/V
PSRR Power suppression ration VDD=4.2V,Vp-p_sin=200mV, 217Hz -60 -81 dB
1kHz -60 -75 dB
THD+N Total harmonic distortion plus noise
VDD=4.2V,Po=0.5W,RL=8Ω,f=1kHz 0.06 0.1 %
VDD=4.2V,Po=0.25W,RL=8Ω,f=1kHz 0.06 0.1 %
PO NCN NCN output power f=1kHz,RL=8Ω,VDD=4.2V 0.85 W
TAT Attack time(-13.5dB) 40 ms
TRL Release time(13.5dB) 2.6 s
AMAX Max attenuation -13.5 dB
VLIMIT Net audio Vth(Vp) VDD=4.2V 15 30 mVp
AMAX1 Net audio max attenuation -15 -16 -17 dB
Vn Speaker Output noise VDD=3.6V, Cin=33nF,Rin=0, RL = 8 Ω
f=20Hz-20kHz,input AC grounded 35 μV
SNR Signal-to-noise ratio VDD = 5 V, PO = 1 W, RL = 8Ω 101 dB
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Mode 4
Iq Quiescent current VDD=3.6V,no vin, no load 4.5 mA
η Efficiency VDD=3.6V,Po=0.8W,RL=8Ω 70 77 %
Av Voltage gain Cin=33nF 11 12 13 V/V
PSRR Power suppression ratio VDD=4.2V,Vp-p_sin=200mV, 217Hz -55 -70 dB
1kHz -55 -68 dB
THD+N Total harmonic distortion plus noise
VDD=4.2V,Po=0.5W,RL=8Ω,f=1kHz 0.2 0.5 %
VDD=4.2V,Po=0.25W,RL=8Ω,f=1kHz 0.2 0.5 %
Vn Speaker Output noise VDD=3.6V, Cin=33nF,Rin=0, RL = 8 Ω
f=20Hz-20kHz,input AC grounded 120 μV
SNR Signal-to-noise ratio VDD = 5 V, PO = 1 W, RL = 8Ω 90 dB
one-wire pulse control
TH CTRL high level hold time VDD=2.5V to 5.5V 0.75 2 10 us
TL CTRL low level hold time VDD=2.5V to 5.5V 0.75 2 10 us
TLATCH CTRL turn on delay time VDD=2.5V to 5.5V 500 us
TOFF CTRL turn off delay time VDD=2.5V to 5.5V 500 us
MEASUREMENT SYSTEM
AW8155 features switching output signal when it operate in mode 1~3. As shown in Figure 4. A Low-Pass
RC filter can be used to remove high switching frequency in output signal。
VOP
VON
INP
INN
Cin
AW8155
Cin 32kHzLow-Pass Fliter
500Ω
500Ω
10nF
10nF
AW8155 measurement system
Table 1 shows recommended values of Rfilter and Cfilter。
Rfilter Cfilter Low-pass cutoff frequency
500Ω 10nF 32kHz
1kΩ 4.7nF 34kHz
Typical RC Measurement Filter Values
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TYPICAL OPERATING CHARACTERISTICS
1
10
0.1
0.01
THD+N vs Frequency
TH
D+
N (
%)
Frequency ( Hz )
20 100 20K1K 10K0
Class-AB
VDD=4.2V
Cin=1μF
RL=8Ω+33μH
250mw
500mw
1
10
0.1
0.01
TH
D+
N (
%)
Frequency ( Hz )
20 100 20K1K 10K
Class-D
VDD=4.2V
Cin=1μF
RL=8Ω+33μH
250mw
500mw
0
10
20
30
40
50
60
70
80
90
100
0 0.2 0.4 0.6 0.8 1.0 1.6
Output Power ( W )
Eff
icie
nc
y (
% )
EFFICIENCY vs OUTPUT POWER
1.2 1.4 1.8
RL=8Ω+33uH
VDD=3.6V
VDD=4.2V
VDD=5V
Class-D
Eff
icie
nc
y (
% )
Output Power ( W )
EFFICIENCY vs OUTPUT POWER
0 0.2 0.4 0.6 0.8 1.0 1.61.2 1.4 1.80
10
20
30
40
50
60
70
80
90
100
0
0.5
1
1.5
2
2.5
2.5 3 3.5 4 4.5 5 5.5
RL=8Ω+33uH
f=1kHz
OUTPUT POWER vs SUPPLY VOLTAGE
Supply Voltage ( V )
Ou
tpu
t P
ow
er
( W
) 1% THD
10% THD
OUTPUT POWER vs SUPPLY VOLTAGE
Supply Voltage ( V )
Ou
tpu
t P
ow
er
( W
)
0
0.5
1
1.5
2
2.5
3
3.5
4
2.5 3 3.5 4 4.5 5 5.5
RL=4Ω+33uH
f=1kHz
1% THD
10% THD
THD+N vs Frequency
Class-AB
RL=8Ω+33uH
VDD=3.6V
VDD=4.2V
VDD=5V
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0.1
10
0.01
THD+N vs OUTPUT POWERT
HD
+N
(%
)
OUTPUT POWER ( W )
0.1 1 20.5
Mode1
f=1kHz
RL=8Ω+33μH
VDD=5V
VDD=4.2V
VDD=3.6V
2
3
4
5
6
7
8
2.5 3.0 3.5 4.0 4.5 5.0 5.5
Supply Voltage ( V )
Su
pp
ly C
urr
en
t (
mA
)
SUPPLY CURRENT vs SUPPLY VOLTAGE
Class-AB
Class-D
RL=8Ω+33uH
OUTPUT POWER vs VIN
OU
TP
UT
PO
WE
R (
W)
VIN ( Vp )
0.5
NCN
0.01
0.05
0.1
0.5
1
2
0.2 0.4 1 20.1
OUTPUT POWER vs VINO
UT
PU
T P
OW
ER
(W
)
VIN ( Vp )
0.50.01
0.05
0.1
0.5
1
2
0.2 0.4 1 20.1
mode2VDD=4.2Vf=1kHzRL=8Ω+33μH
mode1VDD=4.2Vf=1kHzRL=8Ω+33μH
NCN
Frequency ( Hz )
20 100 20K1K 10K
-90
-80
-70
-60
-50
-40
-30
PS
RR
(d
B)
PSRR vs Frequency
-20
-10
0Class-D mode1
f=1kHz
RL=8Ω+33μH
VDD=5V
VDD=4.2V
VDD=3.6V
Frequency ( Hz )
20 100 20K1K 10K
-90
-80
-70
-60
-50
-40
-30
PS
RR
(d
B)
PSRR vs Frequency
-20
-10
0Class-D mode2
f=1kHz
RL=8Ω+33μH
VDD=5V
VDD=4.2V
VDD=3.6V
1
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Frequency ( Hz )
20 100 20K1K 10K
-90
-80
-70
-60
-50
-40
-30
PS
RR
(d
B)
PSRR vs Frequency
-20
-10
0Class-D mode3
f=1kHz
RL=8O+33µH
VDD=5V
VDD=4.2V
VDD=3.6V
Frequency ( Hz )
20 100 20K1K 10K
-90
-80
-70
-60
-50
-40
-30
PS
RR
(d
B)
PSRR vs Frequency
-20
-10
0Class-AB mode4
f=1kHz
RL=8O+33µH
VDD=5V
VDD=4.2V
VDD=3.6V
16
24
2
4
6
8
10
12
14
18
20
22
Ga
in (
dB
)
Gain vs Frequency
Frequency ( Hz )
20 100 20K1K 10K
mode1
mode2
mode3
mode4
20u
300u
40u
60u
80u
100u
120u
140u
160u
180u
200u
220u
240u
260u
280u
Frequency(Hz)
Ou
tpu
t N
ois
e V
olta
ge
(V
)NOISE FLOOR
20 100 20K1K 10K
mode1
mode2
mode3
mode4
Class_AB start up time Class_AB shutdown time
VOP & VON
10ms/div
CTRL
VOP & VON
10ms/div
CTRL
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Class_D start up time Class_D shutdown time
CTRL
VOP&VON
100μs/div
NCN release time
Net audio start up time Net audio shutdown time
Vin
VOP-VON
8ms/div200ms/div
VOP-VON
Vin
CTRL
VOP&VON
10ms/div
Vin
VOP-VON
200ms/div
NCN attack time
Vin
VOP-VON
5ms/div
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BLOCK DIAGRAM
AW8155PGND
INN
InputBuffer
INP
Class-DModulator
EEEModule
D&ABOutputStage
CTRLNCN & System
Control
VDD
AGND
Oscillator OCP OTP
VOP
VON
Cin 33nF
Cs1μF
Cin 33nF
100pF
100pF
FB
FB
10k
Class-ABRNS
GPIO
Functional Block Diagram of AW8155
OPERATION
The AW8155 is a non-crack-noise (NCN), ultra-low-EMI, filter-free, AB/D output mode selection, second generation Class-D audio amplifier. Ultra low THD+N, Unique NCN function, which adjusts the system gain automatically while detecting the “Crack” distortion of output signal, protects the speaker from dam-age at high power levels and brings the most comfortable listening experience to the customers.
AW8155 NCN output power can be set to 0.65w or 0.85w for different speaker, this feature is embedded in order to protect speakers from damage caused by an excessive sound level.
The AW8155 features a unique RNS and net audio technology, which effectively reduces RF energy, attenuate the RF TDD-noise, an acceptable audible level to the customer.
The AW8155 features the EEE (Enhanced Emission Elimination) function which greatly reduces EMI over the full bandwidth. The AW8155 achieves better than 20dB margin under FCC limits with 24 inch of cable.
The filter-free PWM architecture and internal gain setting reduces external components count, board area consumption, system cost and simplifies the design. The over-current, over-temperature is prepared in-side of the device.
The AW8155 is available in an ultra small 1.5mm×1. 5mm FC-9 package. The AW8155 is specified over
the industrial temperature range of -40℃ to +85℃.
One-wire pulse control
AW8155 select each mode by one-wire pulse control, as shown in figure 6. When CTRL pin pull high form
shutdown mode, there is one rising edge, AW8155 start to work and set Gain=18dB, NCN level=0.65w. When
high-low-high signal set to CTRL pin, there are two rising edges, AW8155 start to work and set
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Gain=21.5dB,NCN level=0.85w. When there are three rising edges, AW8155 start to work and set
Gain=21.5dB,net audio is enable. When there are four rising edges, AW8155 start to work in Class_AB
mode,while gain is to be set 21. 5dB..
As shown in figure 6, when CTRL pull down above 500us, AW8155 will enter shutdown mode.
TH TL0.75us<TL,TH<10us
Mode 1
Mode 2
Mode 3
Mode 4
TOFF
One-Wire pulse control
When AW8155 work in different mode,PIN CTRL should be low above 500us which make the AW8155 shut
down, Then series pulse make the AW8155 work in right mode.
MODE2 MODE3
1msCTRL
One-wire pulse mode switch
RNS (RF TDD Noise Suppression)
GSM radios transmit using time-division multiple access with 217Hz intervals. The result is an RF signal with
strong amplitude modulation at 217Hz and its harmonics that is easily demodulated by audio amplifiers.
In RF applications, improvements to both layout and component selection decrease the AW8155’s suscepti-
bility to RF noise and prevent RF signals from being demodulated into audible noise. Minimizing the trace
lengths prevents them from functioning as antennas and coupling RF signals into the AW8155. Additional RF
immunity can also be obtained from relying on the self-resonant frequency of capacitors as it exhibits the
frequency response similar to a notch filter. Depending on the manufacturer, 10pF to 20pF capacitors typically
exhibit self resonance at RF frequencies. These capacitors, when placed at the input pins, can effectively shunt
the RF noise at the inputs of the AW8155. For these capacitors to be effective, they must have a low-imped-
ance, low-inductance path to the ground plane.
Some RF energy will couple onto audio traces regardless of the effort to prevent this phenomenon from oc-
curring, form audible TDD Noise。The AW8155 features a unique RNS technology, which effectively reduces RF
energy, attenuate the RF TDD-noise, an acceptable audible level to the customer.
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VDD
GND
VOP
VON
INP
INN
Cin
AW8155
Cin
RF Energy Coupling Diagram
NCN
In audio application, output signal will be undesirable distortion caused by too large input and power supply
voltage down with battery, and clipped output signal may cause permanent damage to the speaker. The
AW8155 features unique non-crack-noise (NCN) Function, which adjusts system gain automatically to generate
desired output by detecting the “Crack” distortion of output signal, protects the speaker from damage at high
power levels and brings the most comfortable listening experience to the customers.
NCNOFF NCNON
Power Rail
NCNOFF NCNON
Power Rail
Crack Noise
Crack Noise
NCN Function Diagram
Attack time
Attack time is the time it takes for the gain to be reduced once the audio signal exceeds the NCN threshold.
Fast attack times allow the NCN to react quickly and prevent transients such as symbol crashes from being
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distorted. However, fast attack times can lead to volume pumping, where the gain reduction and release be-
comes noticeable, as the NCN cycles quickly. Slower attack times cause the NCN to ignore the fast transients,
and instead act upon longer, louder passages. Selecting an attack time that is too slow can lead to increased
distortion in the case of the No Clip function. Attack time is set 32ms~40ms in AW8155.
Release time
Release time is the time it takes for the gain to return to its normal level once the audio signal returns below
the NCN threshold. A fast release time allows the NCN to react quickly to transients, preserving the original
dynamics of the audio source. However, similar to a fast attack time, a fast release time contributes to volume
pumping. A slow release time reduces the effect of volume pumping. Release time is set 2s~2.6s in AW8155.
Filter-Free Modulation Scheme
The AW8155 features a filter-free PWM architecture that reduces the LC filter of the traditional Class-D ampli-
fier, increasing efficiency, reducing board area consumption and system cost.
Net audio
The net audio function is the function that removes unwanted noise coming in at no-siganl state. It can sup-
press the 217Hz TDD nosie from input signal.
It can automatically attenuate the output when a signal level becomes lower then the threshold level,
output
VBAT
voltag
e
gain
TDD Noise
When signal lower then the
threshold it can automatically
attenuate the gain
Net audio
Pin-Compatible with AW8145, no VREF capacitor
The AW8155 is pin compatible with AW8145.Without VREF 1 uF capacitor it can achieve the same perfor-
mance as AW8145,which make the PCB design more convenient.
Efficiency
Efficiency of a Class D amplifier is attributed to the switching operation of the output stage transistors. In a
Class D amplifier, the output transistors act as current steering switches and consume negligible additional
power. Any power loss associated with the Class D output stage is mostly due to the I2R loss of the MOSFET
on-resistance and supply current. The AW8155 features efficiency of 88%.
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EEE
The AW8155 features a unique Enhanced Emission Elimination (EEE) technology, that controls fast transition
on the output, greatly reduces EMI over the full bandwidth.
Pop-Click Suppression
The AW8155 features unique timing control circuit, that comprehensively suppresses pop-click noise, elimi-
nates audible transients on shutdown, wakeup, and power-up/down.
Protection Function
When a short-circuit occurs between VOP/VON pin and VDD/GND or VOP and VON, the over-current circuit
shutdown the device, preventing the device from being damaged. When the condition is removed, the AW8155
reactivate itself. When the junction temperature is high, the over-temperature circuit shutdown the device.
The circuit switches back to normal operation when the temperature decreases to safe levels.
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APPLICATIONS INFORMATION
Supply Decoupling Capacitor(CS)
The AW8155 is a high-performance audio amplifier that requires adequate power supply decoupling. Place a
low equivalent-series-resistance (ESR) ceramic capacitor, typically 0.1μF. This choice of capacitor and place-
ment helps with higher frequency transients, spikes, or digital hash on the line. Additionally, placing this de-
coupling capacitor close to the AW8155 is important, as any parasitic resistance or inductance between the
device and the capacitor causes efficiency loss. In addition to the 0.1μF ceramic capacitor, place a 1μF ca-
pacitor on the VBAT supply trace. This larger capacitor acts as a charge reservoir, providing energy faster
than the board supply, thus helping to prevent any droop in the supply voltage.
Input Capacitor
The input coupling capacitor blocks the DC voltage at the amplifier input terminal. The input capacitors and internal input resistors (28.5KΩ) form a high-pass filter with the corner frequency, fc.
Hz169RinCin2
1fC
.
Setting the high-pass filter point high can block the 217Hz GSM noise coupled to inputs. Better matching of
the input capacitors improves performance of the circuit and also help to suppress pop-click noise.
Cin 33nF
Differential
Input Cin 33nF
INP
INN
Differential Input
Cin 33nF
Single-Ended
InputCin 33nF
INP
INN
Single-Ended Input
Ferrite Chip Bead and Capacitor
The AW8155 passed FCC and CE radiated emissions with no ferrite chip beads and capacitors with speaker
trace wires 24 inch.Use ferrite chip beads and capacitors if device near the EMI sensitive circuits and/or there
are long leads from amplifier to speaker, placed as close as possible to the output pin.
Ferrite Chip Bead
100pF
100pF
VOP
VON
Ferrite Chip Bead
Ferrite Chip Bead and capacitor
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DEMO INFORMATION
schematic
PCB
Top Layer Bottom Layeraw
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VOLUME DESCRIPTION
Carrier Tape
A0 = 1.78mmB0 = 1.78mmK0 = 0.69mm
User Direction of Feed
Reel
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PACKAGE DESCRIPTION
SIDE VIEW
0.550±0.050
BOTTOM VIEWTOP VIEW
PIN A1 CORNER
1.500±0.050
Unit: mm0.000~0.050
0.152 Ref.
1.500±0.050
Ø0.260±0.050Typ.
0.500±0.050
0.500±0.050
1.000 Ref
0.31 Ref
PIN A1
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REFLOW SOLDERING CURVE
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VERSION INFORMATION
Version Date Description
V1.0 2011-10-11 AW8155FCR datasheet V1.0
V1.1 2018-07-24 Add MSL Level, environmental information, output noise
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DISCLAIMER
Information in this document is believed to be accurate and reliable. However, Shanghai AWINIC Technology
Co., Ltd (AWINIC Technology) does not give any representations or warranties, expressed or implied, as to
the accuracy or completeness of such information and shall have no liability for the consequences of use of
such information.
AWINIC Technology reserves the right to make changes to information published in this document, including
without limitation specifications and product descriptions, at any time and without notice. Customers shall ob-
tain the latest relevant information before placing orders and shall verify that such information is current and
complete. This document supersedes and replaces all information supplied prior to the publication hereof.
AWINIC Technology products are not designed, authorized or warranted to be suitable for use in medical,
military, aircraft, space or life support equipment, nor in applications where failure or malfunction of an AWINIC
Technology product can reasonably be expected to result in personal injury, death or severe property or envi-
ronmental damage. AWINIC Technology accepts no liability for inclusion and/or use of AWINIC Technology
products in such equipment or applications and therefore such inclusion and/or use is at the customer’s own
risk.
Applications that are described herein for any of these products are for illustrative purposes only. AWINIC
Technology makes no representation or warranty that such applications will be suitable for the specified use
without further testing or modification.
All products are sold subject to the general terms and conditions of commercial sale supplied at the time of
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Resale of AWINIC components or services with statements different from or beyond the parameters stated by
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