LX1721EVALKIT [ETC]
AudioMAX Products ; AudioMAX产品\n
| 型号： | LX1721EVALKIT |
| 厂家： | 
ETC |
| 描述： | AudioMAX Products
|
| 文件： | 总8页 (文件大小：258K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
LXE1721 EVALUATION BOARD
USER GUIDE
LXE1721 AUDIOMAX
EVALUATION KIT
USER’S GUIDE
L I N F I N I T Y D I V I S I O N
Copyright 2000
Rev. 0.3, 2001-10-19
Page 1
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1721 EVALUATION BOARD
USER GUIDE
LXE1721 Evaluation Board Quick Start Guide
The LXE1721 Evaluation Board is a fully functional stereo Class-D amplifier. Connection to a single output power supply, two
speakers, and an audio source is all that is required to begin evaluating the amplifier.
Board Setting
1. Power and Ground Connections: The terminal JP1 is for the power supply connection. Vcc is connected to the
positive polarity of the power supply or battery (+7V ~ +15V); the GND is connected to the negative polarity of
the power supply or battery. Please make sure your power supply polarity connection and supply voltage is
correct before you begun to evaluate the board.
2. Speaker Connections: JP5 and JP6 are the speaker outputs. JP5 is for the left channel (CH1) and JP6 is for the
right channel (CH2). Connect speaker “+” and “-“ to “LOUT+/ROUT+” and “LOUT-/ROUT-“ of JP5/JP6. This
evaluation board is designed for standard 4 ohm speaker loads. For different impedance speakers, the output
frequency response is not optimized unless the LC filter design is modified. For speaker impedance of less than 4
ohms, care must be exercised to prevent from overdriving the amplifier system. This could result in inductor
saturation if the output current is too high and further cause damage to the MOSFETs. A power supply set at 6A
current limit is recommended.
3. Audio Input Connections: JP2, JP2A, RCA1 and RCA2 are the audio input connections. JP2/JP2A support
differential audio inputs, and RCA1/RCA2 are for single-ended audio inputs. When audio inputs are differential,
the positive audio inputs are connected to LIN+/RIN+ pin, while the negative inputs are connected to LIN-/RIN-
pin of the JP2/JP2A terminals. J1 and J2 jumpers are left open when using differential inputs. When audio inputs
are single-ended, the audio source can either be connected to terminal JP2/JP2A, or to RCA inputs RCA1/RCA2.
In the single-ended configuration, jumpers J1 and J2 must be closed so that the LIN-/RIN- audio inputs are
connected to Ground.
4. SLEEP/MUTE Connections: JP4 is the jumper terminal to select ON/OFF control for SLEEP and MUTE
functions. To enable the amplifier, both jumpers should be set to “OFF” (SLEEP is OFF, and MUTE is OFF).
5. Pre-amp Output Connections: JP3 is the header for stereo, single-ended pre-amp outputs, “LPREOUT – GND –
RPREOUT”. These outputs are provided to drive other crossover networks or to support additional power
amplifiers such as for a Subwoofer speaker system.
Copyright 2000
Rev. 0.3, 2001-10-19
Page 2
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1721 EVALUATION BOARD
USER GUIDE
APPLICATION SCHEMATIC
FIGURE 1 - LXE1721 SCHEMATIC
Copyright 2000
Rev. 0.3, 2001-10-19
Page 3
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1721 EVALUATION BOARD
USER GUIDE
APPLICATION SCHEMATIC (CONTINUED)
LISN
JP1
R8
Vcc
Vcc
Vcc
2
1
PGND
C1
Q1B
Si4558DY
+
1000uF/25V
Temina l 2
C2
PGND
0.1uF/25V
5.1/1W
Keep this trace as short
as possible, directly from
R6 pin
Vcc
Vcc
LPWM+
R6
LISN
G1
0.020/1W
L100FERRITE/SM chassis_gnd
R9
pgnd
Q1A
Si4558DY
5.1/1W
LFBK-
LFBK+
Cn
Cn
JP7
R10
Cpwm
Clock
1
2
U1
Vcc
Q2B
R1 10k
Si4558DY
1
2
3
4
5
44
5.1/1W
LFAOUT
CPWM
RPWM
_LMUTE
LEAOUT
LEAIN
VREF
CLOCK
GND
LFBK-
HEADER 2
C7 100pF
R5 34.8k 1%
43
42
41
40
LFBK+
LISN
VDD
CN
PGND
LPWM-
C9 18pF
C17 4.7uF/25V,TANT
Vcc
R11
Q2A
Si4558DY
C18
RCA1
R2 56.2k 1% C10 150pF
C13 1uF/10V,TANT
6
7
39
38
47uF/25V
+
PVDD
PGND
LN+
RCAJACK
C19
0.1uF/25V
PGND
1
5.1/1W
LN+
8
9
37
36
35
34
33
32
31
30
29
28
27
26
25
24
23
J1
JUMPER
LP+
LP-
LP+
1
2
C8 0.1uF/25V
C3 0.47uF
10
11
12
13
14
15
16
17
18
19
20
21
22
These traces keep as
short as posible.
V25
LP-
LIN+
LN-
JP2
HEADER 2
1
2
LIN+
LN-
LIN-
RN-
RP-
RP+
RN+
LIN+
LIN-
RIN+
RIN-
LIN-
RN-
C4 0.47uF
C5 0.47uF
RIN+
LAMPOUT
RIN+
RP-
1
2
RP+
R12
RIN-
C6 0.47uF
RIN-
RN+
PGND
CP
Q3B
Si4558DY
LPREOUT
RPREOUT
PGND
C20 4.7uF/25V,TANT
JP2A
HEADER 2
RCA2
RAMPOUT
SLEEP
5.1/1W
RCAJACK
C21
47uF/25V
RPWM-
1
STATUS
_RMUTE
REAIN
PVDD
NC
C22
0.1uF/25V
J2
JUMPER
Vcc
RISN
RFBK+
RFBK-
R13
1
2
R4 56.2k 1%
C11 18pF
C12150pF
Q3A
Si4558DY
REAOUT
RFAOUT
5.1/1W
LX1721CDB
R3 10k
R14
JP3
HEADER 3
RFBK+
RFBK-
Q4B
Si4558DY
5.1/1W
Keep this trace as short
as possible, directly from
R7 pin
RPWM+
Vcc
Vcc
R15
Q4A
Si4558DY
RISN
R22
10k
R23
10k
R7
0.020/1W
5.1/1W
RISN
JP4
ON
SLEEP
OFF
ON
MUTE
OFF
1
3
5
2
4
6
HEADER 3X2
GND
GND
PGND
FIGURE 1A - LXE1721 SCHEMATIC (VIEW OF LX1721 SECTION)
Copyright 2000
Rev. 0.3, 2001-10-19
Page 4
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1721 EVALUATION BOARD
USER GUIDE
APPLICATION SCHEMATIC (CONTINUED)
R16
LFBK+
24.3K 1%
C25
220pF
Q1B
Si4558DY
L1
LPWM+
LOUT+
15uH
Q1A
Si4558DY
R20
15/1W
C29
0.68uF/50V
C35
0.1uF/25V
JP5
1
2
PGND
chassis_gnd
Teminal 2
Q2B
Si4558DY
C30
0.68uF/50V
C36
0.1uF/25V
C31
0.47uF/50V
L2
LPWM-
LOUT-
15uH
R17
Q2A
Si4558DY
LFBK-
24.3K 1%
C26
220pF
1. Star connection is expected for PGND;
2. PGND and GND plate is expected, they
are devided by the center of LX1721
3. Red havey line means needing heavy
duty trace or copper
4. Heatsink need to be solded on the
PGND plate;
R18
5. LPWM+,LPWM-,RPWM+,RPWM- MUST BE KEPT
AS SHORT AS POSSIBLE.
RFBK-
6. Chassis GND circles the whole board
on bothe top layer and bottom layer.
24.3K 1%
C27
220pF
Q3B
Si4558DY
L3
RPWM-
ROUT-
15uH
Q3A
Si4558DY
R21
15/1W
C32
0.68uF/50V
C37
0.1uF/25V
JP6
1
2
PGND
chassis_gnd
Teminal 2
Q4B
Si4558DY
C33
0.68uF/50V
C38
0.1uF/25V
C34
0.47uF/50V
L4
RPWM+
ROUT+
15uH
R19
Q4A
Si4558DY
RFBK+
24.3K 1%
C28
220pF
LINFINITY MICROELECTRONICS
Title
LX1721 STEREO CLASS-D AUDIO AMPLIFIER Evaluation Board
Size
Document Number
Rev
Custom LXB1721
V2.2
Date:
Tuesday, June 19, 2001 Sheet
1
of
1
FIGURE 1B - LXE1721 SCHEMATIC (VIEW OF OUTPUT SECTION)
Copyright 2000
Rev. 0.3, 2001-10-19
Page 5
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1721 EVALUATION BOARD
USER GUIDE
BILL OF MATERIALS
MISCELLANEOUS COMPONENTS
Line
Item
Reference
Qty
Part Description
Manufacturer & Part #
Case
Designators
U1
Q1, Q2, Q3, Q4
L100
1
2
3
4
5
6
7
IC, Controller
IC, N & P – Channel MOSFET
Ferrite Bead, 1000 Ohm
Printed Circuit Board
Inductor, 15uH
QSOP 44
SO-8
1206
1
4
1
1
4
1
1
LINFINITY LX1721CDB
SILICONIX Si4558DY
MURATA BLM41P102SGPT
LINFINITY LXE1721 DC2601
ISI # RL622-150K
Rev.
L1, L2, L3, L4
RCA1
TH
TH
TH
Phono Jack, 90° Nickel Plated, White
Phono Jack, 90° Nickel Plated, Red
MOUSER 161-4214
MOUSER 161-4215
RCA2
J1, J2, JP2, JP2A,
JP7
8
Header, Str. .100” Center, 2Pos
TH
5
AMP 87220-2
AMP 87220-3
JP3
JP4
9
Header, Str. .100” Center, 3Pos
TH
TH
1
1
10
Header, Double Row .100” Center, 6Pos
3M 929950-00
AMP 531220-7
J1, J2
11
Shorting Jumpers, Open Top, Black
TH
2
SULLINS STC02SYAN
BLOCK MASTER 301-021-1000
WAKEFIELD 651B
JP1, JP5, JP6
12
13
14
Terminal Block 2Pos 5mm
Heat Sink Low-Cost for DIP
Epoxy, Thermal Conductive
TH
SMT
3
4
WAKEFIELD 156K
CAPACITORS
Line
Item
Reference
Designators
Part Description
Capacitor, COG, 18pF, 50V, 5%
Capacitor, COG, 100pF, 50V, 5%
Manufacturer & Part #
Case
0805
Qty
NOVACAP 0805N180J500NT
AVX 08055C180JAT2A
NOVACAP 0805N101J500NT
AVX 08055C101JAT2A
NOVACAP 0805N151J500NT
AVX 08055C151JAT2A
AVX 08055C221JAT2A
AVX 08055C104MAT2A
NOVACAP 0805B104M500NT
SAMSUNG CL21B104MBNC
KEMET T491A105K025AS
KEMET T491A475M016AS
AVX TAJA475M016R
C9, C11
C7
1
2
1
2
0805
C10, C12
3
4
Capacitor, COG, 150pF, 50V, 5%
Capacitor, COG, 220pF, 100V, 5%
0805
0805
2
4
C25, C26, C27, C28
C2, C8, C16, C19,
C22, C35, C36, C37,
C38
5
Capacitor, X7R, 100nF, 50V, 20%
0805
9
C13
6
7
Capacitor, Tant 1µF, 25V, 10%
Capacitor, Tant 4.7µF, 16V, 20%
3216
3216
1
2
C17, C20
C3, C4, C5, C6, C31,
C34
8
Capacitor, Stacked MF 0.47µF, 50V, 5%
TH
6
PANASONIC ECQ-V1H474JL
C29, C30, C32, C33
9
10
11
Capacitor, Stacked MF 0.68µF, 50V, 5%
Capacitor, Alum Elect. 47µF, 50V
Capacitor, Alum Elect. 1000µF, 25V
TH
TH
TH
4
2
1
PANASONIC ECQ-V1H684JL
PANASONIC ECA-1HM470I
PANASONIC EEU-FC1E102
C18, C21
C1
RESISTORS
Line
Item
1
2
3
4
Reference
Designators
R1, R3, R22, R23
R16, R17, R18, R19
R5
Part Description
Manufacturer & Part #
Case
Qty
Resistor, 10K, 5%, 1/8W
Resistor, 24.3K, 1%, 1/8W
Resistor, 34.8K, 1%, 1/8W
Resistor, 56.2K, 1%, 1/8W
0805
0805
0805
0805
4
4
1
2
ASJ CR21J103T
ASJ CR21F2432T
ASJ CR21F3482T
ASJ CR21F5622T
R2, R4
KOA RM73B3A5R1J
ROHM MCR100JZHJ5R1
KOA RM73B3A150J
ROHM MCR100JZHJ150
IRC LR2010-01-R0200-F
R8, R9, R10, R11,
R12, R13, R14, R15
5
Resistor, 5.1 Ohm, 5%, 1W
2512
8
R20, R21
R6, R7
6
7
Resistor 15 Ohm, 5%, 1W
2512
2512
2
2
Resistor, Low Value Flat .020
Copyright 2000
Rev. 0.3, 2001-10-19
Page 6
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1721 EVALUATION BOARD
USER GUIDE
BOARD LAYOUT
FIGURE 2 - COMPONENTS LAYER LAYOUT
FIGURE 3 - SOLDER LAYER LAYOUT
L RCA IN
R9
C35
C19
R1
R2
R8
L1
R16
R17
C10
C9
L2
JP2
R10
R11
INL+
INL-
C13
C8
R6
R7
Lpreout
AGND
R preout
C1
C11
C12
R4
INR-
R13
R12
INR+
JP2A
R3
C37
C38
U1
L3
C27
C28
R14
L4
C22
R RCA IN
FIGURE 4 - LXE1721 COMPONENTS PLACEMENT
Copyright 2000
Rev. 0.3, 2001-10-19
Page 7
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
LXE1721 EVALUATION BOARD
USER GUIDE
ABSOLUTE MAXIMUM RATINGS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C ≤ TA ≤ 70°C
LX1721
Typ
Parameter
Supply Voltage
Supply Current
Quiescent Current
Symbol
Test Conditions
Units
Min
Max
VCC
IDD
IQ
7
15
6
V
A
mA
VCC=15V
VCC=15V, Output Open
75
VCC +
0.3
VCC +
0.3
VCC
+0.3
VCC
+0.3
500
Sleep, Status
VCC = 15V
-0.3
-0.3
-0.3
V
V
V
RPWM,CPWM, Mute
LIN+, LIN-, RIN+, RIN-
VCC = 15V
VCC = 15V
VIN
LPREOUT, RPREOUT
Clock Frequency
VPRE VCC = 15V
FOSC VCC = 15V
-0.3
250
V
330
KHz
Copyright 2000
Rev. 0.3, 2001-10-19
Page 8
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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