LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright 2002
Rev. 0.2b, 2002-11-04
LXE1722-150 AUDIOMAX
EVALUATION KIT
USER’S GUIDE
INTEGRATED PRODUCTS
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2
Copyright 2002
Rev. 0.2b, 2002-11-04
LXE1722-150 Evaluation Board Quick Start Guide
The LXE1722-150 Evaluation Board is a fully functional stereo class-D amplifier. Connection to a single power supply, two
speakers, and an audio source is all that is required to begin evaluating the amplifier. The amplifier will support continuous
output power levels up to > 1 10W x 2 into 2 ohm load (<1% THD+N).
Board Setting
1. Power and Ground Connections: The terminal JP1 is for the power supply connection. Vcc is connected to the
positive polarity of th e power supply or battery (+7V ~ +25V ); the GND is connected to the negativ e polarity of the
power supply or battery. Please make sure your power supply polarity connection and supply voltage is correct
before you start to evaluate the board.
2. Speakers 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 filter
values should be modified to optimize the output frequency response. Please see AudioMAX Design Resource
(AN-16) for LC filter values.
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 the 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 inputs audio source can either be connected to terminal JP2/JP2A, or to RCA1/RCA2. In this
single-ended connection, 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 selection for ON/OFF of 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.
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
Copyright 2002
Rev. 0.2b, 2002-11-04
APPLICATION SCHEMATIC
G1
chassis_gnd
11
PGND
RN-
L6
SPL5028-100M
C9 22pF
RFBK-
RPWM+
C25
4700pF
RISN
JP4
HEADER 3X2
12
34
56
Cpwm
RPREOUT
Q7
RFP10P03L
LFBK+
C7 100pF
C11 22 pF
Vcc
LP-
C29
0.68uF/50V
Q4
SUP70N03-09BP
chassis_gnd
JP2
HEADER 2
1
2
C6 0.47uF
OFF
R4 10k
C10 100pF
Filter 3
CHOKE CM
1
2
3
4
C38
0.1uF/25V
C30
0.68uF/50V
RIN+
RFBK+
C5 0.47uF
L100 FERRITE/SM
L1
15uH
R8
5.1/1W
Vcc
C12 100pF
C3 0.47uF
LOUT+
LISN
Vcc
J2
JUMPER
1 2
LIN-
C36
0.1uF/25V
FB1
R16
1.21K 1%
FB4
R12
5.1/1W
RP-
RCA2
RC A JA CK
1
2
L4
15uH
R26
5.6/1W
Keep this trace as short as
possible, directly from R7
pin
LPWM-
C37
0.1uF/25V
R27
5.6/1W
JP6
Temin al 2
1
2
J1
JUMPER
1 2
R11
5.1/1W
R17
1.21K 1%
RCA1
RC A JA CK
1
2
pgnd
Q1
RFP10P03L
C4 0.47uF
ON
Vcc
R20
15/1W
Cn
LISN
R23
10k
C35
0.1uF/25V
Filter 2
CHOKE CM
1
2
3
4
PGND
LIN-
_MUTE
Vcc
GND
+
C20 4.7uF/25V,TANT
C32
0.68uF/50V
C2
0.1uF/25V
JP1
Temin al 2
1
2
C27
4700pF
C8 0.1uF/25V
RFBK-
Q8
SUP70N03-09BP
R7
0.010/1W C28
4700pF
Q2
SUP70N03-09BP
R13
5.1/1W
C22
0.1uF/25V
R14
5.1/1W
LPREOUT
LFBK-
GND
GND
C33
0.68uF/50V
R24
5.6/1W
C34
0.47uF/50V
R18
1.21K 1%
Filter 1
CHOKE CM
1
2
3
4
MUTE
GND
Q3
RFP10P03L
+C1
2200uF/25V
C14
3300pF
RPREOUT
R22
10k
PGND
C18
3300pF
Cn
RPWM-
R3 56.2k 1%
Vcc
RIN-
R10
5.1/1W
R6
0.010/1W
RFBK+
JP2A
HEADER 2
1
2
LFBK+
LN-
R25
5.6/1W
R2 56.2k 1%
Vcc
L2
15uH
R19
1.21K 1%
LFBK-
3 . Re d heavy li n e me a ns n e e d in g h ea v y
duty trace or copper for high current
OFF
Keep this trace as short as
possible, directly from R6
pin
chassis_gnd
R15
5.1/1W
ON
LP+
These traces keep as
short as posible.
C26
4700pF
RISN
R21
15/1W
PGND
C31
0.47uF/50V
FB2
Vcc
SLEEP
PGND
ROUT+
RIN-
LN+
RP+
FB3
Clock
2. PGND and GND plane is expected, they
are devided by the center of LX1721
+
C13 1u F/1 0V,TANT
LPREOUT
C16
3300pF
4. LPWM+,LPWM-,RPWM+,RPWM- MUST BE KEPT
AS SHORT AS POSSIBLE.
PGND
C15
3300pF
Q6
SUP70N03-09BP
+
C17 4.7uF/25V,TANT
Vcc
5. Chassis GND circles the whole board
on both the top layer and bottom
layer.
RN+
C19
0.1uF/25V
L3
15uH
R9
5.1/1W
LIN+
Cn
LOUT-
R5 49.9k 1%
SLEEP
Vcc
LPWM+
+C21
2200uF/25V
U1
LX1722CDB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22 23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
LFAOUT
CPWM
RPWM
_L MUTE
LEAOUT
LEAIN
VREF
CLOCK
GND
V25
LIN+
LIN-
LAMPOUT
RIN+
RIN-
RAMPOUT
SLEEP
STATUS
_RMUTE
REAIN
REAO UT
RFAOUT RFBK-
RFBK+
RISN
NC
PVDD
CP
PGND
RN+
RP+
RP-
RN-
LN-
LP-
LP+
LN+
PGND
PVDD
CN
VDD
LISN
LFBK+
LFBK-
JP3
HEADER 3
1
2
3
JP5
Temin al 2
1
2
R1 10k
Q5
RFP10P03L
JP7
HEADER 2
1
2
1. Star connection is expected for PGND;
FIGURE 1 - LXE1722-150 SCHEMATIC
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 4
Copyright 2002
Rev. 0.2b, 2002-11-04
BILL OF MATERIALS
MISCELLANEOUS COMPONENTS
Line
Item Part Description Manufacturer & Part # Case Reference
Designators Qty
1 IC, Controller LINFINITY LX1722CDB QSOP 44
U1 1
2 IC, P – Channel MOSFET INTERSIL RFP10P03L TO-220 Q1, Q3, Q5, Q7 4
3 IC, N – Channel MOSFET VISHAY SUP70N03-09BP TO-220 Q2, Q4, Q6, Q8 4
4 Ferrite Bead MURATA BLM41P102SGPT 1206 L100 1
5 Choke CM (EMI common mode) Choke Filter1, Filter2, Filter3 3
6 Printed Circuit Board LINFINITY SGE2813-X2 PCB Rev. X2 1
7 Power Supply Choke SPL5028-100M Choke L6 1
8 Inductor, 15uH ABRACON AIMT-103-15µH TH
L1, L2, L3, L4 4
9 Phono Jack, 90° Nickel Plated, White MOUSER 161-4214 TH
RCA1 1
10 Phono Jack, 90° Nickel Plated, Red MOUSER 161-4214 TH
RCA2 1
11 Header, Str. .100” Center, 2Pos ANY 87220-2 TH
J1, J2, JP2, JP2A, JP7 5
12 Header, Str. .100” Center, 3Pos ANY 87220-3 TH
JP3 1
13 Header, Double Row .100” Center, 6Pos ANY 1/87215-2 TH
JP4 1
14 Shorting Jumpers, Open Top, Black MOUSER 151-8030 TH
J1, J2 2
15 Terminal Block 2Pos 5mm BLOCK MASTER 301-021-1000 TH JP1, JP5, JP6 3
CAPACITORS
Line
Item Part Description Manufacturer & Part # Case Reference
Designators Qty
1 Capacitor, 22pF, 50V, 5% NOVACAP 0805N220J500NT
AVX 08055C220JAT2A 0805 C9, C11 2
2 Capacitor, 100pF, 50V, 5% NOVACAP 0805N101J500NT
AVX 08055C101JAT2A 0805 C7, C10, C12 3
3 Capacitor, 100nF, 50V, 20% AVX 08055C104MAT2A
NOVACAP 0805B104M500 NT
SAMSUNG CL21B104MBNC 0805 C2, C8, C19, C22, C35,
C36, C37, C38 8
4 Capacitor, 4700pF, 50V, 5% CALCHIP GMC21CG472J50NT 0805
C25, C26, C27, C28 4
5 Capacitor, Tant 1µF, 16V, 20% KEMET T491A105M016AS
AVX TAJA105M016R 3216 C13 1
6 Capacitor, Tant 4.7µF, 25V KEMET T491A475M016AS
AVX TAJA475M016R 3216 C17, C20 2
7 Capacitor, 0.47µF, 50V, 5% PANASONIC ECQ-V1H474JL TH
C3, C4, C5, C6, C31,
C34 6
8 Capacitor, 0.68µF, 50V PANASONIC ECQ-V1H684JL TH
C29, C30, C32, C33 4
9 Capacitor, 2200µF, 25V, 20% PANASONIC EEU-FC1E222 TH C1, C21 2
RESISTORS
Line
Item Part Description Manufacturer & Part # Case Reference
Designators Qty
1 Resistor, 10K, 5%, 1/8W ASJ CR21J103T 0805
R1, R3, R22, R23 4
2 Resistor, 1.21K, 1%, 1/8W ASJ CR21F1211T 0805
R16, R17, R18, R19 4
3 Resistor, 49.9K, 1%, 1/8W ASJ CR21F4992T 0805
R5 1
4 Resistor, 56.2K, 1%, 1/8W ASJ CR21F5622T 0805
R2, R4 2
5 Resistor, 5.1 Ohm, 5%, 1W KOA RM73B3A5R1J
ROHM MCR100JZHJ5R1 2512 R8, R9, R10, R11, R12,
R13, R14, R15 8
6 Resistor 15 Ohm, 5%, 1W KOA RM73B3A150J
ROHM MCR100JZHJ150 2512 R20, R21 2
7 Resistor, 0.01 Ohm, 1W, 5% VISHAY WSL2512R010FRE4 2512 R6, R7 2
8 Resistor, 0 Ohm, 5% 0805 ASJ CR21J000T 0805 FB1, FB2, FB3, FB4 4
Note: L6, Filter1/2/3 & R24/R25/R26/R27 are optional for EMI reduction.
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 5
Copyright 2002
Rev. 0.2b, 2002-11-04
BOARD LAYOUT
FIGURE 2 - COMPONENTS LAYER LAYOUT
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 6
Copyright 2002
Rev. 0.2b, 2002-11-04
BOARD LAYOUT (CONTINUED)
FIGURE 3 – SOLDER LAYER LAYOUT
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
Copyright 2002
Rev. 0.2b, 2002-11-04
BOARD LAYOUT (CONTINUED)
FIGURE 4 - LXE172 2-150 COMPONENTS PLACEMENT
ABSOLUTE MAXIMUM RATINGS
Unless otherwise specified, the following specifications apply over the operating ambient temperature 0°C≤ TA≤ 70°C
LX1722-150
Parameter Symbol Test Conditions Min Typ Max
Units
Supply Voltage VCC 7 25 V
Supply Current IDD VCC=25V 12 A
Quiescent Current IQ VCC=25V, Output Open 200 mA
Sleep, Status VCC = 25V -0.3 VCC +
0.3 V
RPWM,CPWM, Mute VCC = 25V -0.3 VCC +
0.3 V
LIN+, LIN-, RIN+, RIN- VIN VCC = 25V -0.3 VCC
+0.3 V
LPREOUT, RPREOUT VPRE VCC = 25V -0.3 VCC
+0.3 V
Clock Frequency FOSC VCC = 25V 250 330 500 KHz
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
Copyright 2002
Rev. 0.2b, 2002-11-04
GRAPHS
LINFINITY Mic rose mi 12/06/01 11:44:48LX1722 THD+N vs. Power
4OHM
thdvspwr-4ohm-orig.at1
Color Line Style Thick Data Axis Cursor1 Cursor 2
Cyan Solid 2 Anlr.THD+N Ratio Left *4.96869 % *0.02209 %
Green Solid 2 Anlr.THD+N Ratio Left 4.79020 % 0.02464 %
10Hz ~ 22KHz BPF, f=1KHz, 25VDC, 4ohm load
Cyan -- Channel 1; Green -- Channel 2
0.001
100
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
10
20
50
4.96869
0.02209
%
100m 100200m 500m 1 2 5 10 20 50 74.574.1
W
dx=-70. 47 W dy= -4.94659 %
LINFINITY Microsem i 12/06/01 11:50:07LX1722 THD+N vs. Power
2OHM
thdvspwr-2ohm-orig.at1
Color Line Style Thick Data Axis Cursor1 Curs or2
Cyan Solid 2 Anlr.THD+N Ratio Left *2.32259 % *0.03121 %
Green Solid 2 Anlr.THD+N Ratio Left 2.15622 % 0.03694 %
10Hz ~ 22KHz BPF, 25VDC, 2ohm load, 1KHz
Cyan -- CH1, 1KHz; Green -- CH2,
0.001
100
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
10
20
50
2.32259
0.03121
%
100m 300200m 500m 1 2 5 10 20 50 100 200
114.81.534
W
dx=-113.3 W dy= -2.29138 %
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 9
Copyright 2002
Rev. 0.2b, 2002-11-04
GRAPHS
LINFINITY Microsemi 12/06/01 11:54:23LX1722 THD+N vs. Frequency
4OHM
thdvsfreq_4ohm-orig.at1
10Hz ~ 22KHz BPF, 4ohm load, 25VDC
Cyan -- CH1; Green -- CH2; ---- Pou t=70W ;
Red -- CH1; Magenta -- CH2; ---- Pout=10W;
Blue -- CH1; Yellow -- CH2; ---- Pout=1W;
0.001
100
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
10
20
50
0.13419
0.03484
%
20 20k50 100 200 500 1k 2k 5k 10k
5.025k100.225
Hz
dx=-4. 9248 kHz dy=-0.09935 %
LINFINITY Microsemi 12/06/01 12:01:44LX1722 THD+N vs. Frequency
2OHM
thdvsfreq_2ohm.at1
10Hz ~ 22KHz BPF, 2ohm load, 25VDC
Cyan -- CH1; Green -- CH2; ---- Pou t=1W;
Red -- CH1; Magenta -- CH2; ---- Pout=10W;
Blue -- CH1; Yellow -- CH2; ---- Pout=110W;
0.001
100
0.002
0.005
0.01
0.02
0.05
0.1
0.2
0.5
1
2
5
10
20
50
0.11744
0.02677
%
20 20k50 100 200 500 1k 2k 5k 10k
6.325k100.225
Hz
dx=-6.2248 kHz dy=-0.09067 %
LXE1722-150 EVALUATION BOARD USER GUIDE
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 10
Copyright 2002
Rev. 0.2b, 2002-11-04
GRAPHS
LINFIN ITY Micr osemi 12/06/01 12:02:54LX1722 Frequency Response
4OHM
fr-80k.-4ohm.at1
Color Line Style Thi c k Data Axis Cursor 1 Cursor2
Cyan Solid 2 Anlr.Ampl Left *-0.044 dBr *-1.267 dBr
G reen Sol id 2 Anlr.Ampl Left -0.188 dBr -1.367 dBr
25VDC, 1W output, 10~80KHz BP F, 4ohm Load
Cyan - CH1; Gr een - CH2
-10
+10
-8
-6
-4
-2
+0
+2
+4
+6
+8
-0.044
-1.267
d
B
r
10 200k20 50 100 200 500 1k 2k 5k 10k 20k 50k 100k
19.835k19.35
Hz
dx=-19.816 kHz dy=-1.223 dB
LINFINITY Mi crosemi 12/06/01 12: 04:14LX1722 Frequency R esponse
2OHM
fr-80k.-2ohm.at1
Color Line St yle T hic k Dat a Axis Cursor1 Cursor2
Cyan Solid 2 Anlr. Ampl Left *-4. 598 dB r *-1. 300 dB r
G r een Solid 2 Anlr. Ampl Left -4. 847 dB r -1.399 dB r
25VDC, 1W output , 10~30KHz BP F, 2ohm Load
Cyan - CH1; Gr een - CH2
-10
+10
-8
-6
-4
-2
+0
+2
+4
+6
+8
-4.598
-1.3
d
B
r
10 80k20 50 100 200 500 1k 2k 5k 10k 20k 50k
19.835k19.35
Hz
dx=-19.816 kHz dy=+ 3.298 dB
