MIX2037 [MAXIM]
3W Mono Class-D Audio Power Amplifier; 3W单声道D类音频功率放大器
| 型号： | MIX2037 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | 3W Mono Class-D Audio Power Amplifier |
| 文件： | 总8页 (文件大小：401K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
矽诺威一级代理 龙创威电子 小柯13652437521
MIX2037
3W Mono Class-D Audio Power Amplifier
Description
Features
The MIX2037 is a high efficiency，filter-less 3W
Mono class-D audio power amplifier. The high
power output stage suitable for portable devices.
Output Power：
－3W (VDD=5.0V, RL =4Ω，THD+N=10%)
Supply Voltage : 2.5V to 5.5V
Low Noise and Low distortion
Low Pop noise
The filter-less architecture and the few external
components for operation save the board space
and cost.
Shutdown current less than 1uA
Over temperature protection
Application
The MIX2037 features shutdown and mute control
functions. The Over temperature protection
function and Low POP noise make system design
more flexibility.
Bluetooth devices
Mini-Speaker USB Speaker
2.0 / 2.1 Speaker
The MIX2037 is available in SOP8 package
.
Typical Application
in nfigration
VDD
1uF
VDD
Audio
Input
Ci
Ri
SD
NC
BYPASS
-IN
OUTP
GND
IN-
OUT+
OU
7
OFF
ON
VDD
Bypa
OUTN
GND
1uF
Shanghai Mixinno Microelectronics Co., Ltd
Rev 1.0 Nov.2016
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MIX2037
3W Mono Class-D Audio Power Amplifier
Block Diagram
VDD
OUTP
OUTN
Input
Buffer
-IN
SD
Driver
Modulation
Over
Thermal
Protection
Over
Current
Protection
Referanc
e
Voltage
SHDN
Control
BYPAS
RF Noise
Suppression
POP/CLICK
Suppression
GND
Pin Descriptions
Pin
1
Symbol
I/O Descriptions
Shutdon Control Pin (low for active)
No connection
SD
I
2
NC
Analog reference bypass capacitor
Negative Audio Input
Audio Negative Output
VDD
3
BY
-
I/O
I
4
5
OU
DD
GND
OUTP
O
6
GND
7
Audio Positive Output
8
O
Shanghai Mixinno Microelectronics Co., Ltd
Rev 1.0 Nov.2016
2 / 8
MIX2037
3W Mono Class-D Audio Power Amplifier
Ordering Information
Order Number
Package
Marking
MIX2037
XXXXXXX
Packing
2500pcs/reel
100pcs/tube
MIX2037
SOP8
Absolute Maximum Ratings
VDD
VI
Supply voltage
Input voltage
-0.3V to 6V
-0.3V to VDD+0.3V
-40°C to 85°C
-40°C
5°C 50°C
°C, sec
TA
Operation free-air temperate range
Operation free-air junction temperature
Storage temperature range
TJ
TSTG
TSLD
Soldering temperature
Recommended Operating Condition
MIN
MAX
UNIT
V
VDD
VIH
VIL
S
SD Inpel
SInpuevel
VDD
2.5
2
5.5
VDD=5.0V
VDD=5.0V
V
0.6
V
Therml Information
Parameter
Symbol
Package
MAX
UNIT
Thermal Resistance(Junction to Ambient)
θJA
SOP8
115
°C/W
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Rev 1.0 Nov.2016
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MIX2037
3W Mono Class-D Audio Power Amplifier
Electrical Characteristics
(VDD =5V, Gain=20dB, RL =8Ω, T =25°C, unless otherwise noted.)
Symbol
Parameter
Test Conditions
MIN TYP MAX UNIT
VIN
Supply Power
2.5
-
5.5
V
V
DD=5.0V
VDD=3.6V
DD=5.0V
3
THD+N=10%,f=1KHZ,RL=4Ω
THD+N=1%,f=1KHZ,RL=4Ω
THD+N=10%,f=1KHZ,RL=8Ω
THD+N=1%,f=1KHZ,RL=8Ω
W
1.55
2.5
V
W
W
%
VDD=3.6V
VDD=5.0V
VDD=3.6V
1.28
1.72
0.9
PO
Output Power
VDD=5.0V
1.4
VDD=3.6V
0.75
0.
0.02
.013
0.013
20
VDD=5.0V, PO=1W, RL=4Ω
f=1KHz
VDD=3.6V, PO=0.5W, RL=4Ω
VDD=5.0V, PO=0.5W, RL=8Ω
VDD=3.6V, PO=0.25W, RL=8
Total Harmonic Distortion
Plus Noise
THD+N
f=1KH
0K
Hz
%
GV
Gain
dB
dB
Power-supply ripple
rejection
PSRR
VDD=4.2V ±200mVp-p
65
V
DD=5.0,Vrms=1V,
SNR
Signal-to-Noise Ratio
f=1KHz
-85
dB
GV=20d
A-weighting
NoA-weighting
f=1KHz
60
80
-92
90
85
4
V
D5.0Vput floatg with
Vn
Dyn
η
Output Noise
D
Eff
μV
dB
%
CIN.1μF
VD=5.0V,THD=1%
RL=8Ω, Po=1.5W
RL=4Ω, Po=2.5W
f=1KHz
VDD=5.0V
Quieent Current
No Load
mA
VDD=3.0V
2.7
ISD
Vos
Fosc
Tst
utdown Current
Offset Voltage
Oscillator frequency
Startup time
－
VDD=2.5V to 4.2V
VIN=0V, VDD=5V
VSD=3.3V
1
μA
mV
khz
mS
10
650
15
Bypass capacitor =10nF
OTP
OTH
180
40
No Load, Junction
Temperature
VDD=5.0V
°C
－
Shanghai Mixinno Microelectronics Co., Ltd
Rev 1.0 Nov.2016
4 / 8
MIX2037
3W Mono Class-D Audio Power Amplifier
Typical Operating Characteristics
(VDD =5V, Gain=20dB, RL =8Ω, T =25°C, unless otherwise noted.)
THD+N vs Output Power
THD+N vs Output Power
20
10
20
10
RL=8ohm Gain=20dB
VDD= 3.6V , 4.2V , 5V
RL=4ohm Gain=20dB
VDD= 3.6V , 4.2V , 5V
5
5
2
1
2
1
0.5
0.5
%
%
0.2
0.1
0.2
0.1
0.05
0.05
0.02
0.01
0.02
0.01
1m 2m 5m 10m
100m
500m 1
2
4
1m 2m 5m 10m 20m
100m
50m 1
W
W
THD+N VS FREQUENCY
Frcy Respose
+18
0.5
RL=8ohm Gain=20dB
Vo=1Vp‐p
0.2
0.1
d
B
g
0.05
%
+16
+14
A
0.02
0.01
RL=8ohm Gain=20dB
Cin=0.1uF Rin=30K
+12
0.005
20
50 100 200 500 1k 2k
Hz
5k
20k
20
5100 k 2k
Hz
5k
20k
NOISE FLOOR FFT
-40
-60
RL=8ohm Gain=20dB
d
B
V
-80
-100
-120
10 20
50 100 200 500 1k 2k
Hz
5k 10k 20k
Shanghai Mixinno Microelectronics Co., Ltd
Rev 1.0 Nov.2016
5 / 8
MIX2037
3W Mono Class-D Audio Power Amplifier
Analog Reference Bypass Capacitor
(CBYP
Application Information
)
The Analog Reference Bypass Capacitor (CBYP) is
the most critical capacitor and serves several
important functions. During start-up or recovery
from shutdown mode, C determines the rate at
which the amplifier starts up. The second function
is to reduce noise caused by the power supply
coupling into the output drive signal. This noise is
from the internal analog reference to the ampli
which appears as degraded PSRR and THD+
A ceramic bypass capacitor (CBYP ) with vlue
0.47μF to 1.0μF is recommndefor thbest
noise performance. Increaing te bypass
capacitor reduces clind ppping noise from
power ond eand leaing shutdown.
Input Resistors (RI)
The input resistors (R ) set the gain of amplifier
I
according to the below equation:
ꢀꢁ
Gain = 2 X
(ꢃꢃ)
ꢀꢂ
Rf is 150K
Ω
and the R is the external input resistor.
I
For example, if you put a 30KΩ resistor at the
input stage. The gain is below:
ꢄꢅꢆꢅꢇꢈꢉꢊΩ
Gain =
= 10(ꢃꢃ)= 20dB
ꢋꢉꢊΩ
Please place the input resistor very close to the
MIX2037 for better noise performance.
Input Capacitors (Ci )
Shuation
The input capacitor and input resistor from a
high-pass filter with the corner frequencyfc,
determined in below equation:
ꢇ
The MIXemploys a shutdown function which
consumption less than 1uA current to save the
standby time. The SHDN input terminal should
fc
=
be pull low during normal operation when the
amplifier is in use.
ꢎꢐ
The value of inis mpotant to
consider as it dirthe bass (low
frequency) perfmanircuit.
Bew eqation is sed olve the input coupling
capaitanc
Thermal Protection
Thermal protection on the MIX2037 prevents
damage to the device when the internal die
temperature exceeds 180C. There is a ±30C
tolerance on this trip point from device to device.
Once the die temperature exceeds the thermal set
point, the device enters into the shutdown state
and the outputs are disabled. This is not a latched
fault. The thermal fault is cleared once the
temperature of the die is reduced by 30C. The
device begins normal operation at this point with
no external system intervention.
ꢇ
CI
=
ꢌꢄꢍꢀꢎꢁꢑꢐ
The capacitors should have tolerance of ±10% or
better, because any mismatch in capacitance
causes an impedance mismatch at the corner
frequency.
Shanghai Mixinno Microelectronics Co., Ltd
Rev 1.0 Nov.2016
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MIX2037
3W Mono Class-D Audio Power Amplifier
封装图（SOP8）
Millietermm)
Symb
Inch
min
max
1.750
0.250
1.550
0.510
0.250
5.100
4.000
6.200
min
max
0.069
0.010
0.061
0.020
0.010
0.200
0.157
0.244
A
b
1.30
0.100
1.350
0.330
0.170
4.700
3.800
5.800
0.053
0.004
1.550
0.013
0.006
0.185
0.150
0.228
c
D
E
E1
e
1.27(BSC)
0.050(BSC)
0.016 0.050
L
0.400
1.270
Shanghai Mixinno Microelectronics Co., Ltd
Rev 1.0 Nov.2016
7 / 8
MIX2037
3W Mono Class-D Audio Power Amplifier
IMPORTANT NOTICE
Shanghai Mixinno Microelectronics and its subsidiaries (Mixinno) reserves the right to make
corrections, modifications, enhancements, improvements, and other changes to its products and to
this document without any notice. The information contained in this document has been carefully
checked and is believed. However, Mixinno shall assume no responsibilities for inaccuracies and
make no commitment to update or to keep the information contained in this document.
Mixinno products are designed only for commercial and normal industrial applications. And are not
authorized for use in life support equipment where a failure of which could lead to death, personal
injury or environmental or property damage. Use of the products in such application is at
customer’s own risk and expense. Mixinno is not responsible or liable for any incidental which
result from misapplication or improper use or operation of the product.
It is an unfair and deceptive business practice that resale of Mixinno producor sevices with
statements different from or beyond the parameters stated by Mixinno at pduct or service.
Mixinno is not responsible or liable for any such statements.
There are some probabilities with the products fail. Hono does its best to improve the
quality and reliability of the products.
Shanghai Mixinno Microelectronics Co., Ltd
Rev 1.0 Nov.2016
8 / 8
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