LX1711EVALKIT [ETC]
AudioMAX Products ; AudioMAX产品\n
| 型号： | LX1711EVALKIT |
| 厂家： | 
ETC |
| 描述： | AudioMAX Products
|
| 文件： | 总11页 (文件大小：301K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
LXE1710/1711 AUDIOMAX
EVALUATION KIT
USER’S GUIDE
I N T E G R A T E D P R O D U C T S
Copyright 2000
Page 1
Microsemi
Rev. 1.2b, 2002-05-03
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
INTRODUCING LX1710/1711 AUDIOMAX
Thank you for your interest in the latest generation of AudioMAX products. The LXE1710/1711 evaluation board is
a fully functional mono amplifier designed to demonstrate the “new and improved” Switching Class-D Power
Amplifier IC from Linfinity Microsemi. The LX1710/1711 is a completely new controller design with superior
performance over the LX1720 stereo controller IC. Key improvements include better SNR, lower noise floor, and
reduced THD therefore resulting in a much “quieter” and “cleaner” sounding amplifier.
The evaluation board has been configured with easy-to-use terminal block connections for power supply/battery hook
up and speaker connections. An RCA jack or separate audio +/- pins allow a quick interface to your audio source.
Jumpers are also provided to enable/disable the amplifier (Sleep control) and to turn off the audio input (Mute
control). With minimal setup, the user can be listening to the amplifier in a matter of a few minutes.
Both the LX1710 and LX1711 operate from a single supply voltage. The LXE1710 evaluation board can
accommodate a supply voltage from 7V to 15V which produces 25W into 4Ω and greater than 40W into 2Ω. The
LX1711 can handle a higher supply voltage (7V to 25V) and provides greater than 50W continuous output power
into 4Ω. The evaluation amplifier board has been designed for a 4Ω load. The output filter can be easily modified to
change frequency response for other load optimization.
For Information on circuit analysis, design, tradeoffs, and component selection, please see Application Note AN-16
“AudioMAX™ design Resource”
Thank you again for your interest in the new “quieter”, high efficiency Class-D Audio Amplifier from Linfinity
Microsemi. Please let us know what you think and stay tuned for future product releases to our AudioMAX family
of products.
Regards,
Microsemi
Linfinity Division
http://www.microsemi.com
(714) 898-8121
Copyright 2000
Page 2
Microsemi
Integrated Products
Rev. 1.2b, 2002-05-03
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
TABLE OF CONTENTS
LX1710 / 1710 AudioMAX Evaluation Board Features and Circuit Description..............................4
Input Compensation
Output Stage
Filter Stage
Quick Start Guide............................................................................................................................................5
Application Schematic...................................................................................................................................6
Electrical Characteristics..............................................................................................................................7
Performance Graphs......................................................................................................................................8
Board Layout....................................................................................................................................................9
Printed Circuit Board....................................................................................................................................10
Bill of Materials..............................................................................................................................................11
Copyright 2000
Page 3
Microsemi
Integrated Products
Rev. 1.2b, 2002-05-03
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
Part Number
Product
Description
AudioMAX High
VDD = 7V to 15V, Switching Class-D Mono
Power Amplifier IC, 28-Pin SSOP Package.
LX1710CDB
Fidelity Controller IC
AudioMAX High
VDD = 7V to 25V, Switching Class-D Mono
Power Amplifier IC, 28-Pin SSOP Package.
LX1711CDB
LXE1710
Power Controller IC
Fully Operational Mono Audio Amplifier.
LX1710 AudioMAX
Evaluation Board
25W, 4Ω
Fully Operational Mono Audio Amplifier.
LX1711 AudioMAX
Evaluation Board
LXE1711
50W, 4Ω
LX1710/1711 AUDIOMAX EVALUATION BOARD FEATURES AND CIRCUIT DESCRIPTION
•
Fully Assembled Mono Evaluation Board with
Class-D Controller IC
•
•
•
Supports Full Audio Bandwidth
Optimized to Drive 4Ω Speaker Load
Terminal Block Connectors for Supply
Voltage and Speaker Connection
RCA Plug for Audio Input Signal
•
•
Improved SNR and Noise Floor Performance
Output Power of 25W typical (LX1710, 15VDD,
4Ω, 1% THD+N)
•
•
Output Power of 50W typical (LX1711, 25VDD,
4Ω, 1% THD+N)
The AudioMAX Evaluation Amplifier Board allows the
user to quickly connect and evaluate the
LX1710/1711 Switching Class-D Mono Controller IC.
Easy-to-connect terminal blocks and an RCA plug are
provided for interfacing to Power, Speaker, and Audio
Input connections. The single stage output filter has
been configured to drive a 4Ω load and support full
audio bandwidth amplification (See Audio Application
Note for LC filter design component selection,
calculations, and suggested inductor and capacitor
capacitors set up the controller operating frequency,
response characteristics, and comparator ramp
fundamental to Class-D operation.
OUTPUT STAGE
The next section is the output stage. The controller
IC generates a PWM output by controlling external
FETs connected in a full bridge configuration. The full
bridge configuration is connected between the single
supply voltage (PVDD) and ground (PGND) with the
output of the bridge driving the LC filter stage.
Because the FETs are either fully “on” or fully “off”,
Class-D topology is extremely efficient (up to 85%
typical), circuit power dissipation is minimal, and
maximum power is delivered to the speaker. The
bridge output also drives the RC low pass filter, which
provides the feedback for the control loop through the
FBK+ and FBK- inputs.
values for other loads).
The Evaluation Board
operates from a single supply voltage.
The Class-D Amplifier Controller IC requires a
minimal number of external components to create a
complete amplifier solution. See Evaluation Board
Schematic and Bill of Materials for circuit specifics. A
Class-D Amplifier is a “switching” amplifier that
converts a low-level, analog audio input signal into a
high power, pulse-width modulated (PWM) output.
The switching frequency (430kHz typical but can be
adjusted) is much higher than the audio bandwidth
(20Hz to 20kHz), and is easily filtered out with a
FILTER STAGE
The single stage, second order LC filter is used to
remove the switching frequency. The frequency
response and corner frequency can be easily
adjusted for optimization of various loads. The LC
evaluation board component values have been
chosen for a 4Ω load. See section on LC filter design
for component selection.
simple LC filter.
The support circuitry can be
generally grouped into three areas (input circuit,
output power stage, and output filter).
INPUT COMPENSATION
The first group is the compensation network and
control setting components. These resistors and
Copyright 2000
Page 4
Microsemi
Rev. 1.2b, 2002-05-03
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
QUICK START GUIDE
The LXE1710/1711 Evaluation Board is a fully
functional, Class-D Amplifier. Connection to a single
supply voltage (VDD from either a battery or power
supply), speakers, and your audio source is all that is
required to begin evaluating the amplifier and listening
LC filter design section for recommended
inductor and capacitor modifications.
4) Audio Input Connection: Connect your audio
source to the RCA Jack CN1, Audio In. For
other type interfaces, the audio input signal can
also be connected to the amplifier board using
the J3 (In- and In+) location. Strip Line Plugs
can be inserted into J3 for connectivity.
to music.
The following outlines the necessary
connections and control jumpers.
1) Verify contents of Evaluation Kit: The easy-to-
use amplifier is all contained on a single board.
Visually inspect to see if the board or any
components were damaged during shipping.
All components are located on the top side of
the PCB except for the decoupling capacitor,
C17. A copy of the LX1710/1711 Datasheet
can be downloaded from the Microsemi.com
website.
5) Jumper Selection Controls: The “on/off” or
enable to the module is controlled with the
SLEEP/ signal.
Jumper J1 connects the
SLEEP/ to “on” or “ off”. SLEEP/ is an active
Low control. Jumper J2 connects the MUTE
control which enables/disables the audio input
to the amplifier. MUTE is an active High signal.
See table below.
2) Power and Ground Connections: The voltage
supply and ground connections are made through
terminal block TB1. Connect your “+” (+7V to +15V for
the LXE1710 or +7V to +25V for the LXE1711) power
supply or battery to the +V input of TB1. Connect your
supply or battery ground to the GND input of TB1.
Please ensure the correct positive and ground
connections are made before turning on the power
supply.
6) Power Source: If a power supply is being used,
make sure it is set to the correct voltage level
and turn the power supply on.
7) Audio Source: Make sure the audio source
signal is set to a minimum level. Start or “play”
audio source and adjust source volume to
desired level.
3) Speaker Connection: The amplifier is designed
to drive a single 4Ω speaker. Connect speaker
“+” and “-“ to the +OUT and –OUT input of
terminal block TB2 respectively. The amplifier
can be used to drive other speaker loads but
frequency response may not be optimal. See
8) Listen to AudioMAX: If the amplifier is not
operating properly, verify preceding steps or
contact Linfinity for technical assistance (714)
898-8121.
To Speaker +
To Speaker -
To Power Supply +V
7V-15V for LX1710
7V-25V for LX1711
Jumper
toward
OFF
Jumper
toward
ON
Amplifier
disabled
(SLEEP/ is
ON)
Jumper
floating
To Power Supply
Ground
Amplifier
enabled
(SLEEP/ is
OFF)
Amplifier
disabled
(SLEEP/ is
ON)
J1 Jumper:
SLEEP/
Optional
Audio In -
Audio Input
enabled
(MUTE is
OFF)
Audio Input
enabled
(MUTE is
OFF)
Audio Input
disabled
J2 Jumper:
MUTE
Optional
Audio In +
(MUTE is ON)
Table 1: Jumper Settings
To Audio
Copyright 2000
Page 5
Microsemi
Rev. 1.2b, 2002-05-03
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
SCHEMATIC
VIN7V to 15V
C9
0.1µF
35V
+
25
24
28NC
C22
RS1
VDD
CLOCK
C17
220µF
25V
.1µF
.0347
PVDD
+
C13
2.2µF
+
27
23
C11
4.7µF
IS-
P+
C12
.1µF
26
5
CP
RPWM
Q1
Q2
R12
10 ohm
L1 15µH
R5 34.8K
C1
6
CPWM
C16
1µF
100pF
R3
1
4
R13
15 ohm
1W
VREF
V25
C20
.68µF
24.3K
22
20
C8
N+
*
.1µF
50V
R11
10 ohm
C7
220pF
C2
C18
.47µF
1µF
2
10
11
9
GND
LX1710
C21
SLEEP
MUTE
P-
C19
.47µF
.68µF
Q3
Q4
R6
10 ohm
SLEEP
MUTE
AUDIO
INPUT
NC
INAMPOUT
INPUT+
L2 15µH
R8 10K
21
R10
19 10 ohm
7
N-
C3
470nF
R4
24.3K
C26
330pF
PGND
C6
220pF
8
3
INPUT-
NC
C10
4.7µF
R9 10K
C14
470nF
+
*This node is signal GND one of
two grounds in the schematic,
the others are power GND.
These two grounds should be
connected together as a star
connection somewhere close to
power supply ground pin
18
16
17
CN
C5
18pF
14
13
15
EAOUT
EAIN
FBK+
FBK-
C4
150pF
R1 56.2K
12
NC
FAOUT
STATUS
R2 10K
LXE1710 – Evaluation Board Schematic
Copyright 2000
Rev. 1.2b, 2002-05-03
Page 6
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C<TA<70°C.
For test circuit, see LXE1710 Evaluation Board Schematic diagram.
PARAMETER
SYMBOL
TEST CONDITIONS
MIN.
TYP.
MAX
UNITS
Supply Voltage
LX1710
LX1711
VDD
7
15
V
VDD
IDD
IQ
7
25
V
A
VIN=15V, PO=38W, RL=2Ω,
Supply Current
3
THD+N=1%
Quiescent Current
VIN=15V, No Input
43
14
25
40
50
mA
W
W
W
w
VIN=15V, RL=8Ω, THD+N=1%,
10Hz to 22kHz
VIN=15V, RL=4Ω, THD+N=1%,
10Hz to 22kHz
Output Power
Efficiency
PO
VIN=15V, RL=2Ω, THD+N=1%,
10Hz to 22kHz
VIN=25V, RL=4Ω, THD+N=1%,
10Hz to 22kHz
VIN=15V, fIN=1kHz, PO=10W
VIN=15V, fIN=1kHz, PO=20W
fIN=1kHz, PO=1W
82
85
%
%
0.05
%
Total Harmonic Distortion Plus
Noise
THD+N
fIN=20Hz to 20kHz, PO=1W
0.3
%
Signal-To-Noise Ratio
SNR
81
dBr
VIN=15V, VRIPPLE=1VRMS
,
Power Supply Rejection Ratio
PSRR
-70
dB
10Hz to 10kHz
Copyright 2000
Page 7
Microsemi
Rev. 1.2b, 2002-05-03
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
PERFORMANCE GRAPHS
EFFICIENCY VS. OUTPUT POWER
OUTPUT POWER VS. SUPPLY VOLTAGE
90%
85%
80%
75%
70%
65%
60%
55%
50%
45%
60
50
40
30
20
10
0
0
5
10
15
20
25
30
6
11
16
21
26
Output Power (W)
Supply Voltage (VIN
)
4Ω
VIN = 15V
fIN=1kHz
RL=4Ω
THD+N=1%
FREQUENCY RESPONSE
THD+N VS. OUTPUT POWER
+20
+15
100
50
20
10
5
+10
+5
2
1
0.5
-0.08
-0.59
0.26
0.1
-5
0.04
0.02
0.01
-10
-15
-20
0.005
0.002
0.001
17.88k
18.2
10
50
100 200
500
1k 2k
5k
10k
50k 80k
24.56
30
1.13 2
50m
100m 200m 500m
5
10 20
Frequency (Hz)
Output Power (W)
VIN=15V
VIN=15V
fIN=1kHz
RL=4Ω
RL=4Ω
RO=1WRMS
Copyright 2000
Page 8
Microsemi
Rev. 1.2b, 2002-05-03
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
PRINTED CIRCUIT BOARD LAYOUT
TB1: Power Supply Terminal Block
+V, GND
J3: Optional Connections
Audio In +, Audio In -
CN1: RCA Jack
Audio In
Silkscreen Layer
TB2: Audio Output Terminal Block
J1: Sleep Jumper
J2
+ OUT, - OUT
Copyright 2000
Page 9
Microsemi
Rev. 1.2b, 2002-05-03
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
PRINTED CIRCUIT BOARD
Bottom Layer
Top Layer
Copyright 2000
Page 10
Microsemi
Integrated Products
Rev. 1.2b, 2002-05-03
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1710 / 1711 EVALUATION BOARD
USER GUIDE
BILL OF MATERIALS
MISCELLANEOUS COMPONENTS
Line
Item
1
2
3
4
Reference
Part Description
Manufacturer & Part #
Case
Qty
Designators
U1
Lin f in it y LX1710 / LX1711
Fair ch il d FDS6612A
Fair ch il d FDS4953
Lin f in it y SGE2758
Controller
SSOP 28
SO-8
SO-8
1
2
2
1
N-Channel MOSFET
P-Channel MOSFET
Printed Circuit Board
Q2, Q4
Q1, Q3
REV.X
ISI RL622-150K
(LXE1710)
TH
SMT
TH
5
Inductor, 15uH
L1, L2
2
Coil cr af t DO5022-153HC (LXE1711)
Mou s er 161-4214
6
7
8
9
Phono Jacks, 90° Nickel Plated, Wht
Strip Line Plugs, Straight, Single Row .100"
Shorting Jumpers, Open Top, Black
Terminal Block 2 pos 5mm
CN1
J1, J2
J1
1
2
1
2
CA CA-S36-24B-44
TH
Mou s er 151-8030
Bl ock Mas t er 301-021-1000
TH
TH
TB1, TB2
CAPACITORS
Line
Item
Reference
Designators
Part Description
Capacitor, COG, 18pF, 50V, 5%
Capacitor, COG, 150pF, 50V, 5%
Part Description
Case
1206
Qty
Novacap 1206N180J500NT
AVX 12065C180JAT2A
Novacap 1206N151J500NT
AVX 12065C151JAT2A
AVX 12065C221JAT2A
1
C5
1
2
1206
C4
1
3
4
Capacitor, COG, 220pF, 50V, 5%
Capacitor, X7R, 330pF, 50V, 10%
1206
1206
C6, C7
C26
2
1
Pan as on ic ECU-V1H331KBM
Novacap 1206B474M160NT
AVX 1206YC474MAT2A
Novacap 1206B105K500NT
AVX 12065C105KAT2A
Novacap 0805N101J500NT
AVX 08055C101JAT2A
5
6
7
Capacitor, X7R, .47uF, 16V, 20%
Capacitor, X7R, 1uF, 50V, 10%
Capacitor, COG, 100pF, 50V, 5%
1206
1206
0805
C3, C14
C1, C2
C16
2
2
1
AVX TAJA104M035R
8
9
Capacitor Tant 0.1uF 35V 20%
Capacitor Tant 2.2uF 25V 20%
3216
3216
C9
C13
1
1
Kemet T491A225M025AS
Kemet T491A475M016AS
AVX TAJA475M016R
10
Capacitor, Tant, 4.7uF, 16V, 20%
3216
C10, C11
2
Pan as on ic ECQ-V1H104JL
Pan as on ic ECQ-V1H474JL
Pan as on ic ECQ-V1H684JL
El n a RV-25V221MH10-R
11
12
13
14
Capacitor Stacked MF 0.1uF 50V 5%
Capacitor Stacked MF 0.47uF 50V 5%
Capacitor Stacked MF 0.68uF 50V 5%
Capacitor, Elect 220uF, 25V, 20%
TH
TH
TH
NT
C8, C12, C22
C18, C19
C20, C21
C17
3
2
2
1
RESISTORS
Line
Item
Reference
Designators
Part Description
Part Description
Case
Qty
ASJ CR32J103T
ASJ CR32F2432T
ASJ CR J100T
ASJ CR21J103T
ASJ CR21F3482T
ASJ CR J203T
ASJ CR21F5622T
KOA RM73B3A150J
Roh m MCR100JZHJ150
IRC LR2010-01-R0374-F
1
2
3
4
5
6
7
Resistor, 10K, 5%, 1/4W
Resistor, 24.3K, 1%, 1/4W
Resistor, 10 Ohm, 5%, 1/8W
Resistor, 10K, 5%, 1/8W
Resistor, 34.8K, 1%, 1/8W
Resistor,20K, 5%, 1/8W
Resistor, 56.2K, 1%, 1/8W
1206
1206
0805
0805
0805
0805
0805
R2
1
2
4
2
1
1
1
R3, R4
R6, R10, R11, R12
R8, R9
R5
R7
R1
8
9
Resistor, 15 Ohm 5% 1W
2512
2512
R13
RS1
1
1
Resistor, Low Value Flat .0374
Copyright 2000
Page 11
Microsemi
Rev. 1.2b, 2002-05-03
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
相关型号：
©2020 ICPDF网 联系我们和版权申明