PAM8009

PAM8009
3W STEREO CLASS-D Audio Amplifier and Class AB
Headphone Driver (DC VOLUME, UVP and AGC Function)
Description
Pin Assignments
The PAM8009 is a 3W, Class D audio-power amplifier for driving
external components and allows BTL (Speaker) volume control and
SE (Headphone) volume control, the gain range is from +20dB
(Volume=5V) to -60dB (Volume=0V) with 64 steps precise control.
PAM8009
XXXYWWLL
ADVANCED INFORMATION
bridged-tied stereo speakers. Advanced DC volume control minimizes
Integrated power-limit technology suppresses the output signal
clip automatically due to the over level input signal. This technology
also offers low THD+N and protects speaker.
Integrated Undervoltage Protection (UVP) technology, external
undervoltage detection can be used to shut down the PAM8009 before
an input device can generate a pop.
PAM8009 is available in SO-24 and U-QFN4040-20.
Features
•
Operating Voltage: 2.8v ~ 5.5v
•
Filter – Free and Low EMI
•
Low Quiescent Current
•
IDD=7mA @ VDD= 5V
•
ROUTN 1
HP_ROUT 2
SD 3
BYPASS 4
RINN 5
64 Steps DC Volume Control from -80dB to +20dB by DC Voltage
with Hysteresis
•
P8009
XXXYW
15 LOUTN
14 HP_LOUT
13 VDD
12 UVP
11 AGC
Power Limit Function
Disable: 0.45VDD ~ VDD
Max. Power: GND
•
UVP Function
•
Output Power @ THD+N=1%
Disable: Floating
BTL Mode
Applications
VDD=5V, Rl=4Ω; Po=2.4W
VDD=5V, Rl=8Ω; Po=1.4W
SE Mode
VDD=5V, Rl=32Ω; Po=60mW
•
Output Power @ THD+N = 10%
•
LCD Monitor / Projects
•
Projects / All-In-One Computers
•
Portable Speakers
•
Portable DVD Player / Game Machines
BTL Mode
VDD=5V, Rl=4Ω; Po=3.0W
VDD=5V, Rl=8Ω; Po=1.7W
•
Input Signal and Headphone Output Signal in Phase
•
Thermal and Over-Current Protections with Auto-Recovery
•
Power Enhance Package SO-24 and U-QFN4040-20
•
Lead Free and Green Devices Available (RoHS Compliant)
•
Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
•
Halogen and Antimony Free. “Green Device (Note 3)
Notes:
1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant.
2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimonyfree, "Green" and Lead-free.
3. Halogen- and Antimony-free "Green” products are defined as those which contain <900ppm bromine, <900ppm chlorine (<1500ppm total
Br + Cl) and <1000ppm antimony compounds.
PAM8009
Document number: DS37224 Rev. 1 - 2
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PAM8009
ADVANCED INFORMATION
Typical Applications Circuit
Pin Descriptions
SO-24
Package Name
QFN-20
Name
1
3
/SD
2
4
Bypass
3
5
RIN
4, 5, 20, 21
6, 18
GND
6
7
LIN
7
8
VOLUME
8
9
MUTE
9
10
SE/ BTL
10
11
AGC
11
12
UVP
12, 18, 23
13,16,20
VDD
13
14
HP_LOUT
14, 16
-
N.C
Function
Full Chip Shutdown Control Input (Active Low)
Bias Voltage for Power Amplifier
Negative Input of Right Channel Power Amplifier
Ground Connection
Negative Input of Left Channel Power Amplifier
Internal Gain Setting Input
Connect to VDD which Set Max. Gain = +20dB
Mute Control Signal Input (Active High)
Output Mode Control Input
High for SE Mode and Low for BTL Mode
VDD ~ 0.45 x VDD or Floating, Disable the Function
Under Voltage Protection Input
Floating or Pull High Disable the Function
Power
Headphone Output of Left Channel Power Amplifier
No Connection
Headphone Output of Right Channel Power Amplifier
15
2
HP_ROUT
17
15
LOUTN
Negative Output of Left Channel Power Amplifier
19
17
LOUTP
Positive Output of Left Channel Power Amplifier
22
19
ROUTP
Positive Output of Right Channel Power Amplifier
24
1
ROUTN
Negative Output of Left Channel Power Amplifier
PAM8009
Document number: DS37224 Rev. 1 - 2
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PAM8009
ADVANCED INFORMATION
Functional Block Diagram
Absolute Maximum Ratings (@TA = +25°C, unless otherwise specified.) (Note 4)
Symbol
VDD
VDD
TJ
TSTG
TSDR
Notes:
Parameter
Supply Voltage
Input Voltage
Maximum Junction Temperature
Storage Temperature Range
Maximum Soldering Temperature Range, 5 Seconds
Rating
-0.3 to 6.0
-0.3 to VDD + 0.3
+150
- 65 to +150
+300
Unit
V
°C
4. Stresses greater than the 'Absolute Maximum Ratings' specified above may cause permanent damage to the device. These are stress ratings only;
functional operation of the device at these or any other conditions exceeding those indicated in this specification is not implied. Device reliability may be
affected by exposure to absolute maximum rating conditions for extended periods of time.
Recommended Operating Conditions (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
Max
Unit
VDD
Supply Voltage Range
2.8 ~ 5.5
V
SD, MUTE
2 ~ VDD
V
SE, BTL
0.8 x VDD ~ VDD
V
SD, MUTE
0 ~ 0.8
V
SE, BTL
0 ~ 1.0
V
V
High Level Threshold Voltage
VIH
VIL
Low Level Threshold Voltage
VICM
Common Mode Input Voltage
1 ~ VDD - 1
TA
Ambient Operation Temperature Range
-40 ~ + 85
TJ
Junction Temperature Range
-40 + 125
°C
Thermal Information (@TA = +25°C, unless otherwise specified.)
Symbol
Parameter
θJA
Thermal Resistance – Junction to Ambient
θJC
Ambient Operation Temperature Range
SO-24
QFN4040-20
PAM8009
Document number: DS37224 Rev. 1 - 2
SO-24
QFN4040-20
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Typical Value
Unit
+96
+45
°C/W
+18
+7
°C/W
January 2015
© Diodes Incorporated
PAM8009
Electrical Characteristics (@TA = +25°C, VDD = 5V, Gain = Max., RL=8Ω, unless otherwise specified.)
Symbol
Parameter
Conditions
Min
Typ
Max
Units
2.8
200
-
7
4
3
4
250
10
5.5
1
300
33
56
-
V
mA
mA
mA
mA
µA
KHz
KΩ
KΩ
mV
-
0.26
-
-
0.19
-
-
0.28
-
-
0.21
-
-
0.29
-
-
0.21
-
1.5
2.8
-
1.72
1.7
3.0
0.08
0.08
-
-
- 61
-
dB
85
80
-
-82
90
88
180
270
83
-
dB
ADVANCED INFORMATION
BTL Mode
VDD
IQ
IQ
IMUTE
IMUTE
ISD
FOSC
Ri
Ri
VOS
THD+N
Total Harmonic Distortion Plus
Noise
VMUTE=0, VSD=5V, No Load
VMUTE=0, VSD=5V, No Load
VMUTE=0, VSD=5V, No Load
VMUTE=0, VSD=5V, No Load
VMUTE=0, VSD=0V, No Load
Gain=20dB
Gain=3.5dB
No load
VDD=5.5V, Ids=0.8A
P MOSFET
VDD=5.5V, Ids=0.8A
N MOSFET
VDD=4.5V, Ids=0.6A
P MOSFET
VDD=4.5V, Ids=0.6A
N MOSFET
VDD=3.6V, Ids=0.4A
P MOSFET
VDD=3.6V, Ids=0.4A
N MOSFET
Bypass Capacitor, Cb=2.2uF
THD+N=10%, f=1KHz, Rl=8Ω
THD+N=10%, f=1KHz, Rl=4Ω
Rl=8Ω, Po=0.8W, f=1KHz
Rl=4Ω, Po=1.6W, f=1KHz
PSRR
Power Supply Ripple Rejection
Input AC-GND, f=1KHz, Vpp=200mV
CS
Channel Separation
η
Efficiency
VN
Noise
Po=1W, f=1KHz
Po=1.7W, f=1KHz, Rl=8Ω
Po=3W, f=1KHz, Rl=4Ω
Input AC-GND, A-weighting
Non A-weighting
F=20 ~ 20KHz, THD=1%
RDS(on)
TSTART UP
Po
SNR
Supply Voltage Range
Quiescent Current (BTL)
Quiescent Current (SE)
Mute Current (BTL)
Mute Current (SE)
Shutdown Current
Oscillator Frequency
Input Resistance (BTL)
Input Resistance (SE)
Output Offset Voltage
Drain – Source on-State
Resistance
Startup time from Shutdown
Output Power
Signal Noise Ratio
Ω
S
W
%
%
uV
uV
dB
SE Mode
Vos
Po
Output Offset Voltage
Output Power
Total Harmonic Distortion Plus
Noise
No load
THD+N=1%, Rl=32Ω, f=1KHz
-
2.5
60
-
V
mW
Rl=32Ω, Po=50mW, f=1KHz
-
0.02
-
%
Power Supply Ripple Rejection
Input AC-GND,F=1KHz,Vpp=200mV
-
75
-
dB
CS
Channel Separation
Vn
Noise
Po=1W, f=1KHz
Input AC-GND, A-weighting
Non A-weighting
F=20 ~ 20KHz, THD=1%
-
-87
74
58
89
-
dB
uV
uV
dB
THD+N
PSRR
SNR
Signal Noise Ratio
Control Section
VIH
VIL
VMH
VML
OTP
/SD Input High
/SD Input Low
Mute Input High
Mute Input Low
Over Temperature Protection
-
1.4
1.4
-
150
0.6
0.6
-
V
V
V
V
°C
OTH
Over Temperature Hysteresis
-
-
108
-
°C
PAM8009
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PAM8009
Typical Performance Characteristics
THD+N vs. Output Power
ADVANCED INFORMATION
50
F=100Hz / 1KHz / 10KHz
VDD=5v
RL=4Ω+33uH
THD+N≦10%
Av=20dB
AUX-0025
AES-17(20KHz)
F=100Hz / 1KHz / 10KHz
VDD=5v
RL=8Ω+33uH
THD+N≦10%
Av=20dB
AUX-0025
AES-17(20KHz)
20
10
5
2
%
1
0.5
0.2
0.1
0.04
1m
2m
5m
10m
20m
50m
100m
200m
500m
1
2
5
W
THD+N vs. Frequency
10
10
Po=0.3W / 0.5W / 0.8W
VDD=5v
RL=8Ω
Av=20dB
AUX-0025
AES-17(20KHz)
5
2
Po=0.5W / 1W / 1.5W
VDD=5v
RL=4Ω
Av=20dB
AUX-0025
AES-17(20KHz)
5
2
1
1
%
%
0.5
0.5
0.2
0.2
0.1
0.1
0.05
0.06
0.03
20
50
100
200
500
1k
2k
5k
10k
20
20k
50
100
200
500
1k
2k
5k
10k
20k
Hz
Hz
Crosstalk vs. Frequency
+0
T
-5
-10
-15
-20
-25
-30
-35
-40
-45
d
B
T
T
T
T
T
T
T
T
T
+0
T
T
-5
VDD=5v
Vo=1Vrms
RL=8Ω
Av=20dB
AUX-0025
AES-17(20KHz)
-15
-20
-25
-30
-35
-40
-45
d
B
-50
-55
T T
T T
T T
T
VDD=5v
Vo=1Vrms
RL=4Ω
Av=20dB
AUX-0025
AES-17(20KHz)
-50
-55
-60
-60
R-Channel to L-Channel
-65
-70
R-Channel to L-Channel
-65
-70
-75
-75
-80
-80
-85
-85
R-Channel to L-Channel
-90
-95
-100
20
T T
-10
R-Channel to L-Channel
-90
-95
50
100
200
500
1k
Hz
PAM8009
Document number: DS37224 Rev. 1 - 2
2k
5k
10k
20k
-100
20
50
100
200
500
1k
2k
5k
10k
20k
Hz
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PAM8009
Typical Performance Characteristics (Cont.)
ADVANCED INFORMATION
PSRR vs. Frequency
+0
+0
T T TT
TT TT TTT T
TT
T TTT TT
TT
T
T T T TT
T TT
T TT
TTT
T TT T
TT
TTT
T T TT
TT
-5
-10
-15
-20
-25
-30
-35
d
B
-40
-5
VDD=5v
RL=8Ω
Av=20dB
VRR=200mVPP
AUX-0025
AES-17(20KHz)
-10
-15
-20
-25
-30
-35
d
B
-40
-45
-45
-50
-50
-55
-55
-60
-60
-65
-65
-70
-70
T
T
T
VDD=5v
RL=4Ω
Av=20dB
VRR=200mVPP
AUX-0025
AES-17(20KHz)
-75
-75
-80
20
50
100
200
500
1k
2k
5k
10k
-80
20
20k
50
100
200
500
1k
2k
5k
10k
20k
Hz
Hz
Output Noise vs. Frequency
+0
+0
-10
-20
-30
-40
d
B
r
-50
A
-70
VDD=2.8v ~ 5.5v
RL=8Ω+2*33uH
Av=20dB
Input AC Ground
AUX-0025
AES-17(20KHz)
-10
-20
-30
-40
-60
VDD=2.8v / 3.3v / 3.6v / 4.2v / 5v / 5.5v
-80
d
B
r
-50
A
-70
-60
VDD=2.8v / 3.3v / 3.6v / 4.2v / 5v /
5.5v
-80
-90
-90
-100
-100
-110
-110
-120
20
VDD=2.8v ~ 5.5v
RL=4Ω+2*33uH
Av=20dB
Input AC Ground
AUX-0025
AES-17(20KHz)
50
100
200
500
1k
2k
5k
10k
20k
-120
20
Hz
PAM8009
Document number: DS37224 Rev. 1 - 2
50
100
200
500
1k
2k
5k
10k
20k
Hz
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PAM8009
Typical Performance Characteristics (Cont.)
ADVANCED INFORMATION
Table 1 DC Volume Control
PAM8009
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PAM8009
Application Information
ADVANCED INFORMATION
AGC Function
When output reaches the maximum power-setting value, the Internal Programmable Gain Amplifier will decrease the gain to prevent the output
waveform from clipping. This feature prevents speaker damage from occurring using the AGC pin to set the AGC function, limiting the output
power.
Table 1: AGC Setting Threshold vs. Output
AGC Function
Output Power
VDD ~ 0.45VDD or
AGC Floating
AGC function Disable
0.45VDD ~ 0.27VDD
Po=[[8(1/2VDD-VAGC)^2]/Rl] x 0.95
0.27VDD ~ GND
Po=2.3W (Max. output power 4Ω)
Po=1.2W (Max. output power 8Ω)
Mute Operation
The MUTE pin is an input for controlling the Class-D output state of the PAM8009. A logic low on this pin enables the outputs, and a logic high on
this pin disables the outputs. This pin may be used to quickly disable or enable the outputs without a volume fade. Quiescent current is listed in the
electrical characteristics table. The MUTE pin can be left floating due to the internal pull-down.
Shutdown Operation
In order to reduce power consumption while not in use, the PAM8009 contains shutdown circuit to turn off the amplifier’s bias circuit. The amplifier
is turned off when logic low is placed on the /SD pin. When switching the /SD pin to low level, the amplifier enters a low-consumption current status.
The /SD pin can be left floating due to the internal pull-up.
Undervoltage Protection
External undervoltage detection can be used to shut down the PAM8009 before an input device can generate a pop. The shutdown threshold at the
UVP pin is 1.2V. The user selects a resistor divider to obtain the shutdown threshold and hysteresis for the specific application.
The threshold can be determined as below:
With the condition: R3 >> R1//R2
VUVP = [1.2-(6uA x R3)] x (R1+R2)/ R2
Hysteresis = 5uA x R3 x (R1+R2)/ R2
Power Supply Decoupling
The PAM8009 is a high performance CMOS audio-amplifier that requires adequate power supply decoupling to ensure the outputs of THD and
PSRR are as low as possible. Power supply decoupling also prevents oscillation caused by long lead between the amplifier and the speaker. The
optimum decoupling is achieved by using two capacitors of different types that target different types of noise on the power supply leads. For higher
frequency transients, spikes, or digital hash on the line, a good Low-Equivalent-Series-Resistance (ESR) ceramic-capacitor, typically 0.1uF is
recommend, placing it as close as possible to the device’s VDD lead. For filtering lower-frequency noise signals, a large capacitor of 10uF or
greater placed near the audio amplifier is recommended.
PAM8009
Document number: DS37224 Rev. 1 - 2
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PAM8009
Application Information (Cont.)
ADVANCED INFORMATION
Input Capacitor (Ci)
Large input capacitors are both expensive and space hungry for portable designs. Clearly, a certain sized capacitor is needed to couple in low
frequency without severe attenuation. But in many cases the speakers used in portable systems, whether internal or external, have little ability to
reproduce signals below 100Hz to 150Hz. Thus, using a large-input-capacitor may not increase actual system performance. In this case, Input
Capacitor (Ci) and Input Resistance (Ri) of the amplifier form a high-pass filter with the corner frequency determined equation below:
Fc = 1/ 2πRi x Ci
In addition to system cost and size, click and pop performance is affected by the size of the input coupling capacitor, Ci. A larger in/out coupling
capacitor requires more charge to reach its quiescent DC voltage (Normally 1/2 VDD). This charge comes from the internal circuit via the feedback
and is apt to create pops upon device enabling. Thus, by minimizing the capacitor size based on necessary low frequency response, turn on pop
can be minimized.
Bypass Capacitor (CBYP)
Bypass Capacitor (CBYP) is the most critical capacitor and serves several important functions. During start-up or recovery from shutdown mode,
CBYP determines the rate at which the amplifier starts up. The second function is to reduce noise produced by the power supply caused by coupling
into the output signal. The noise is from the internal analog reference to the amplifier, which appears as degraded PSRR and THD+N.
A ceramic bypass capacitor (CBYP) of 0.47uF to 1.0uF is recommended for the best THD and noise performance. Increasing the bypass capacitor
reduces clicking and popping noise from power on/off and entering and leaving shutdown.
Ordering Information
PAM8009
Document number: DS37224 Rev. 1 - 2
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PAM8009
PAM8009
XXXYWWLL
ADVANCED INFORMATION
Marking Information
PAM8009
Document number: DS37224 Rev. 1 - 2
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PAM8009
Package Outline Dimensions (All dimensions in mm.)
Please see AP02002 at http://www.diodes.com/datasheets/ap02002.pdf for the latest version.
3
A
A
D
ADVANCED INFORMATION
SO-24 (Type TH)
e
n
a
l
P
g
n
i
t
a
e
S
2
A
'
A
'
L
I
A
T
E
D
1
A
h
h
c
5
2
.
0
SO-24 (Type TH)
Dim
Min Max Typ
A
2.36 2.64 2.54
A1
0.10 0.30 0.20
A2
2.26 2.35 2.30
A3
0.97 1.07 1.02
b
0.39 0.48
c
0.25 0.31
D
15.20 15.60 15.40
e
1.27BSC
E
10.10 10.50 10.30
E1
7.40 7.60 7.50
h
0.25 0.75
L
0.70 1.00
L1
1.40 BSC
θ
0°
8°
All Dimensions in mm
0
L
'
A
'
L
I
A
T
E
D
1
1
L
e
b
U-QFN4040-20
A1
A3
A
Seating Plane
U-QFN4040-20
Dim Min
Max
Typ
A
0.55 0.65 0.60
A1
0
0.05 0.02
A3
0.15
b
0.20 0.30 0.25
D
3.95 4.05 4.00
D2
2.40 2.60 2.50
E
3.95 4.05 4.00
E2
2.40 2.60 2.50
e
0.50 BSC
L
0.35 0.45 0.40
Z
0.875
All Dimensions in mm
D
(Pin #1 ID)
e
E2
E
D2
L
Z (8x)
PAM8009
Document number: DS37224 Rev. 1 - 2
b
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PAM8009
IMPORTANT NOTICE
ADVANCED INFORMATION
DIODES INCORPORATED MAKES NO WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, WITH REGARDS TO THIS DOCUMENT,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
(AND THEIR EQUIVALENTS UNDER THE LAWS OF ANY JURISDICTION).
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use of Diodes Incorporated products in such safety-critical, life support devices or systems, notwithstanding any devices- or systems-related
information or support that may be provided by Diodes Incorporated. Further, Customers must fully indemnify Diodes Incorporated and its
representatives against any damages arising out of the use of Diodes Incorporated products in such safety-critical, life support devices or systems.
Copyright © 2015, Diodes Incorporated
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PAM8009
Document number: DS37224 Rev. 1 - 2
12 of 12
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January 2015
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