Applications
5V Power Supply
Filterless,Low Quiescent Current and Low
EMI
Low THD+N
Power Limit Function to Protect Speaker
when Occuring large Input,5%Power limit Accuracy
64-step DC Volume Control from -45dB to
24dB
Headphone Output Function 12dB Effective Noise Reduction Superior Low Noise:30uV Minimize Pop/Clip Noise High Efficiency up to 90%
Auto Recovery Short Circuit Protection Thermal Shutdown LCD Monitors /TV Projectors Notebook/All-in-one Computers P ortable Speakers
Portable DVD Players,Game Machines
power limit technology which suppress the output signal clip automatically due to the over level input signal.12dB nosie attenuation .This circuit may help eliminate external filtering,thereby saving the board space and components cost.The PAM8010f eat ures SCP (short circuit protection),OTP and thermal shutdown.
±n n n n
headphone amplifier.Advanced 64-step DC volume control minimizes external components a n d a l l o w s s p e a k e r v o l u m e c o n t r o l a n d headphone volume control.
Integrated It offers low THD+N,to produce high-quality sound reproduction.
PAM8010has an additional noise reduction circuit which achieve The PAM8010is available in SSOP-24and SOP-24package.
n n n n n n n n n n n n Pb-Free Package
Typical Application
S HDN
M UTE_D V OL
ON
SHDN
ON 1uF
PVD DR
P VDDR
R1
V TH
1uF
P L
V DD
R2
1uF
220uF
220uF
RT H
3.3V/5V
M U T E 1uF
P VDD L
E arInL
E arInR
MUTE _AB
H:Op era tion
L:MU TE (defa ult)
EarO utR
EarO utL
+O UT_R
-OUT _R
V REF
+O UT_L
-OU T_L
A VDD
V 2P5
D C Vol ume 1u F
PVDD L H e adphone
12
3
PGNDL
0.47uF
INL
PGN DR
0.47uF
IN R
AGN D
0.47uF
0.47uF
I NL I NR
PAM8010
Pin Configuration &Marking Information
X:Internal Code Y:Year WW:Week
LL:Internal Code
Block Diagram
SSOP24/SOP24
Top View
-OUT_L PGNDL +OUT_L PVDDL AGND INL EarInL
PL
VREF EarOutL EarOutR
VOL EarInR VTH
SHDN PVDDR +OUT_R PGNDR -OUT_R 1712345678
9101112
1314151618192021222324
AVDD MUTE_D V2P5INR
INR INL
PVDDR PGNDR
EarInR
EarInL
MUTE_D
PL
VTH
Pin Descriptions
Absolute Maximum Ratings
These are stress ratings only and functional operation is not implied Exposure to absolute maximum ratings for prolonged time periods may affect device reliability All voltages are with respect to ground ...
Supply Voltage ............................................6.0V Operation Junction Temperature ....-40to 125Storage Temperature.....................-65°C to 150Soldering Temperature.......................Input Voltage.............................-0.3V to V +0.3V °C °C °C
300°C,5sec
DD Recommended Operating Conditions
Supply Voltage Range.......................Junction Temperature Rang...........-20to 125Ambient Operation Temperature
Range............................................-20to 852.5V to 5.5V
°C °C
°C °C
Thermal Information
Electrical Characteristic
V=5V,Gain=Maximum,R=8T=25°C unless otherwise noted.
Ω,，
DD L A
%
1m
3
2m
5m
10m
20m
50m 100m
200m
500m
1
2
W
Typical Operating Characteristics (T
=25°C)
A
V =5V,R =8Gv=24dB,°C,unless otherwise noted
DD L Ω, Τ=25Α3.THD+N vs Frequency
1.THD+N vs Output Power
2.THD+N vs Output Power
6.Crosstalk vs Frequency
Class D Output
5.PSRR vs Frequency
4.THD+N vs Frequency
0.0650
0001020
%
10m
5
20m
50m
100m
200m
500m
1
2
W
0.03
100.050.1
0.2
0.5
1
2
5
%
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
0.06
10
0.10.2
0.5
1
2
5
%
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
+-
--------d B
Hz
--d B
2020k
50100200500
1k 2k 5k 10k Hz
Typical Operating Characteristics (T =25°C)
A
V =5V,R =8Gv=24dB,°C,unless otherwise noted
DD L Ω, Τ=25Α8.Noise Floor
7.Frequency Response
Class D Output
9.Power Dissipation vs Output Power
10.Power Dissipation vs Output Power
12.Efficiency VS Output Power
11.Efficiency VS Output Power
+
++++++++++d B r A
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
-110
-50-105
-100-95
-90-85-80-75-70
-65
-60-55
d B r A
2020k
501002005001k 2k 5k 10k
Hz
01020304050607080901000
500
1000
1500
2000
Output P ower(m W)
01020304050607080901000
500
1000
150
2000
2500
3000
3500
Out put P ower(mW )
05010015020025030
0350*******
500
1000
1500
2000
2500
3000
3500
O utp u t P ow er(mW )
0204060801001201401601800
500
10001500
2000
Ou tpu t P o w er(m W )
Typical Operating Characteristics (continued)
13.Output Power VS Supply Voltage
14.Output Power VS Supply Voltage
15.Rdson VS Output Current
16.Switching Frequency VS Supply Voltage
17.Quiescent Current
18.Gain Step
4567891011122
3
4
5
6
Supply
Voltage(V)
-50
-40-30-20-1001020300
20
4060
80
Ste p
0500
1000
1500
2000
2500
2
3
4
5
6
Supply
Voltage(V)
0500
10001500
200025003000
3500400045002
3
4
5
6
Supply Voltage(V)
0501001502002503000
500
1000
1500
2000
Outpu t Curr ent(mA)
240242
244246248250252254234
56
Supply V oltage(V
)
Typical Operating Characteristics (continued)
19.Output Power VS PL-Voltage
20.Noise Threshold VS R TH
05001000150020002500300035000
0.2
0.4
0.6
0.8
1
1.2
P L-V
oltage(V)
05101520253035404550100
150
200250
300
RT H(k Ω)
-130
+
-120
-110
-100---------d B
20
20k
50100200500
1k 2k 5k 10k Hz
-100
+0-90
-80-70-60-50-40
-30-20-10d B
2020k
50100200500
1k 2k 5k 10k Hz
0.01
1
0.02
0.050.10.2
0.5
%20
20k
50
100
200
500
1k
2k
5k
10k
Hz
0.01
10
0.020.05
0.0.0.%
10u
100m
20u 50u 100u 200u 500u
1m 2m 5m 10m 20m W
0.01
200.020.05
10%
10u
200m 20u 50u 100u 200u 500u 1m
2m 5m 10m 20m 50m W
Typical Operating Characteristics (continued)
V =5V,Gv=10dB,°C,unless otherwise noted
DD Τ=25ΑEarphone Output
3.THD+N vs Frequency
1.THD+N vs Output Power
2.THD+N vs Output Power
6.Crosstalk vs Frequency
5.PSRR vs Frequency
4.THD+N vs Frequency
0.01
1
0.02
0.05
0.1
0.2
0.5
%
20
20k
50
100
200
500
1k
2k
5k
10k
Hz
d
B
r
A
2020k 501002005001k2k5k10k
Hz -2
-1
-1
-1
-1
-1
-1
-1
-1
-1
-1
d
B
r
A
2020k
501002005001k2k5k10k
Hz
Typical Operating Characteristics(continued)
8.Noise Floor
7.Frequency Response
9.Gain Step
-80
-70
-60
-50
-40
-30
-20
-10
10
020406080
Step
Typical Operating Characteristics(continued) Table1.DC Volume Control
Notes
1.The AP AUX-0025low pass filter is necessary for class-D amplifier measurement with AP analyzer.
2.Two 22μH inductors are used in series with load resistor to emulate the small speaker for effic iency measurement.
Test Setup for Performance Testing(Class D)AP System One Generator
PAM8010Demo Board
+OUT
Input
Load
AP Low Pass Filter
AUX-0025
AP System Two
Analyzer
GND
-OUT VDD
Power Supply
Application Notice
1.When the PAM8010works with LC filters,it
should be connected with the speaker before it's powered on,otherwise it will be damaged easily.2.When the PAM8010works without LC filters,it's better to add a ferrite chip bead at the outgoing line of speaker for suppressing the possible electromagnetic interference.
3.The absolute maximum rating of the PAM8010operation voltage is 6.0V.When the PAM8010is powered with 4battery cells,it should be noted that the voltage of 4new dry or alkaline batteries is over 6V,higher than its maximum operation voltage,which probably
ma ke t h e dev ice d amag ed.T he refo re,i t's recommended to use either 4Ni-MH (Nickel Metal Hydride)rechargeable batteries or 3dry or alkaline batteries.
4.The input signal should not be too high,if too high ,it will cause the clipping of output signal when increasing the volume.Because the DC volume control of the PAM8010has big gain,it will make the device damaged.
5.When testing the PAM8010without LC filters b y using resistor instead of speaker as the output load,the test results,e.g.THD or efficiency,will be worse than those using speaker as load.
Application Information (continued)
C i i
1f =
2πRC
Application Information (continued)
Over Temperature Protection
H o w t o R ed u c e EM I (E lec tr o Ma g n et ic Interference)
PCB Layout Guidelines Grounding
Thermal protection on the PAM8010prevents the device from damage when the internal die temperature exceeds 150.There is a 15degree tolerance on this trip point from device to device.Once the die temperature exceeds the thermal set point,the device outputs are disabled.This is not a latched fault.The thermal fault is cleared once the temperature of the die is reduced by 40.This large hysteresis will prevent motor boating sound well.The device begins normal operation at this point without external system interaction.Before thermal shutdown,the gain of the PAM8010will drop -3dB when the chip temperature reaches 12A simple solution is to put an additional capacitor 1000uF at power supply terminal for power line coupling if the traces from amplifier to speakers are short (<20CM).
Most applications require a ferrite bead filter as shown at Figure 1.The ferrite filter reduces EMI around 1MHz and higher.When selecting a ferrite bead,choose one with high impedance at high frequencies,and low impedance at low frequencies (MH2012HM221-T).
Figure 1:Ferrite Bead Filter to reduce EMI At this stage it is paramount to notice the necessity of separate grounds.Noise currents in the output power stage need to be returned to output noise ground and nowhere else.Were these currents to circulate elsewhere,they may get into the power supply,the signal ground,etc,worse yet,they may form a loop and radiate noise.Any of these cases results in degraded amplifier performance.Th e logical returns for the output noise currents associated with Class D switching are the respective PGND pins for each
channel.The switch state diagram illustrates that PGND is instrumental in nearly every switch state.This is the perfect point to which the output noise ground trace should return.Also note that output noise ground is channel specific.A two channel amplifier has two seperate channels and consequently must have two seperate output noise ground traces.The layout of the PAM8010offers separate PGND connections for each channel and in some cases each side of the bridge.Output noise grounds must be tied to system ground at the power in exclusively.Signal currents for the inputs,reference,etc need to be returned to quite ground.This ground is only tied to the signal components and the GND pin,and GND then tied to system ground.
℃℃0℃.
Ordering Information
PackageType
PAM8010
Shipping Number of Pins
Outline Dimension
SSOP-24
Outline Dimension
SOP-24