SHANGHAI AWINIC TECHNOLOGY CO., LTD.

23
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 level0.65w 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 Crackdistortion 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 -40to +85.

Transcript of SHANGHAI AWINIC TECHNOLOGY CO., LTD.

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

order acknowledgement.

Nothing in this document may be interpreted or construed as an offer to sell products that is open for ac-

ceptance or the grant, conveyance or implication of any license under any copyrights, patents or other indus-

trial or intellectual property rights.

Reproduction of AWINIC information in AWINIC data books or data sheets is permissible only if reproduction

is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices.

AWINIC is not responsible or liable for such altered documentation. Information of third parties may be subject

to additional restrictions.

Resale of AWINIC components or services with statements different from or beyond the parameters stated by

AWINIC for that component or service voids all express and any implied warranties for the associated AWINIC

component or service and is an unfair and deceptive business practice. AWINIC is not responsible or liable for

any such statements.

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