Maxim MAX9713 Max9713 evaluation kit Datasheet

19-3521; Rev 2; 11/07
MAX9713 Evaluation Kit
The MAX9713 evaluation kit (EV kit) is a fully assembled
and tested printed-circuit board (PCB) that contains the
MAX9713 filterless class D amplifier. The EV kit is capable of delivering 6W into an 8Ω load and is designed to
operate from a 10V to 25V DC power supply. The
MAX9713 EV kit accepts differential or single-ended
input signals and provides an option to select between
different switching frequencies.
Features
♦ 10V to 25V Single-Supply Operation
♦ Up to 85% Efficiency
♦ Drives 6W into 8Ω or 8W into 16Ω
♦ Differential or Single-Ended Input Modes
♦ Pin-Selectable Frequency Options
♦ Pin-Selectable Gain Options
♦ Low 0.1% THD+N
Ordering Information
PART
TYPE
MAX9713EVKIT+
EV Kit
♦ Surface-Mount Construction
♦ Fully Assembled and Tested
+Denotes lead-free and RoHS-compliant.
Component List
DESIGNATION
QTY
DESCRIPTION
C1
1
0.1µF ±10%, 25V X5R ceramic
capacitor (0402)
TDK C1005X5R1E104K
C2, C3
2
33µF ±10%, 35V tantalum
capacitors (D case)
AVX TAJD336K035
2
0.1µF ±10%, 25V X7R ceramic
capacitors (0603)
Murata GRM188R71E104K
TDK C1608X7R1E104K or
equivalent
C4, C5
C6, C7, C8
C9, C10, C12
C11
3
100pF ±5%, 50V C0G ceramic
capacitors (0402)
Murata GRP1555C1H101J
Taiyo Yuden UMK105CG101JW
TDK C1005C0G101J
3
0.47µF ±10%, 6.3V X5R ceramic
capacitors (0402)
Murata GRM155R60J474K
TDK C1005X5R0J474K
1
0.01µF ±10%, 25V X7R ceramic
capacitor (0402)
Murata GRP155R71E103K
TDK C1005X7R1E103M
DESIGNATION
QTY
DESCRIPTION
1
1µF ±10%, 25V X7R ceramic
capacitor (0805)
TDK C2012X7R1E105K or
equivalent
C14
1
1000pF ±10%, 50V X7R ceramic
capacitor (0603)
Murata GRM188R71H102K
TDK C1608X7R1H102KT
C15
0
Not installed, ceramic capacitor
(0603)
C16–C22
0
Not installed, ceramic capacitors
(0402)
D1
1
5.1V, 20mA zener diode (SOT-23)
Central CMPZ5231B LEAD FREE
(Top Mark: C8F)
FB1
1
100Ω ±25%, 1.7A ferrite bead
(0603)
Murata BKP1608HS101-T
FB2, FB3
2
1kΩ ±25%, 150mA ferrite beads
(0402)
Murata BK1005HM102-T
FOUT1+,
FOUT1-,
FOUT2+,
FOUT2-
0
Not installed, test points
JU1–JU5
5
3-pin headers
JU6, JU7
2
2-pin headers
C13
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
1
Evaluates: MAX9713
General Description
Evaluates: MAX9713
MAX9713 Evaluation Kit
Component List (continued)
DESIGNATION
QTY
L4, L5
0
Not installed, power inductors
DESCRIPTION
10kΩ ±5% resistor (0402)
R1
1
R2, R3
0
Not installed, resistors (0402)
T1
0
Not installed, common-mode choke
U1
1
32-pin TQFN-EP*, 5mm x 5mm x 0.8mm
Maxim MAX9713ETJ+
—
7
Shunts
—
1
PCB: MAX9713 Evalution Kit+
*EP = Exposed paddle.
Component Suppliers
SUPPLIER
AVX Corp.
PHONE
WEBSITE
843-946-0238 www.avxcorp.com
Central
631-435-1110 www.centralsemi.com
Semiconductor Corp.
Murata Mfg. Co., Ltd. 770-436-1300 www.murata.com
Taiyo Yuden
800-348-2496 www.t-yuden.com
TDK Corp.
847-803-6100 www.component.tdk.com
Note: Indicate that you are using the MAX9713 when contacting these component suppliers.
Quick Start
Recommended Equipment
Before beginning, the following equipment is needed:
• 15V, 1A power supply
3) Verify shunts across pins 1-2 of jumpers JU2 and
JU3 (Gain = 16dB).
4) Verify shunts across pins 1-2 of jumpers JU4 and
JU5 (spread-spectrum mode, frequency centered at
335kHz).
5) Connect the speaker across the OUT+ and OUTpads.
6) Connect the positive terminal of the 15V power supply to the V+ pad and the ground terminal of the
power supply to the GND pad.
7) Connect the audio source across the VIN+ and VINpads.
8) Turn on the power supply, and then turn on the
audio source.
Detailed Description
The MAX9713 EV kit contains the MAX9713 filterless
class D amplifier IC. The EV kit operates from a 10V to
25V DC power supply and accepts a differential or single-ended audio input source. The single-ended input
mode accepts up to 2VP-P signals, and the differential
mode accepts up to 4VP-P signals. The audio input
source is amplified to drive 6W into an 8Ω speaker.
The MAX9713 EV kit provides three sets of differential
outputs. The device outputs (OUT+/-) can be connected directly to a speaker load without any filtering.
However, a filter can be added to ease evaluation. The
filtered outputs (FOUT1+/-) require installation of filtering components T1, C21, and C22. The LCR filtered
outputs (FOUT2+/-) require installation of filtering components L4, L5, C15–C20, R2, and R3.
• Audio source (i.e., CD player, cassette player)
• 8Ω/16Ω speaker
Procedure
The MAX9713 EV kit is fully assembled and tested.
Follow the steps below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
1) Verify that no shunt is across jumper JU6 (differential
input mode).
2) Verify shunt across pins 1-2 of jumper JU1. Install
shunt across jumper JU7 (EV kit is enabled).
2
_______________________________________________________________________________________
MAX9713 Evaluation Kit
Shutdown Mode
Jumpers JU1 and JU7 control the shutdown pin
(SHDN) of the MAX9713. See Table 1 for the JU1 and
JU7 functions.
Note: Contact your local Maxim representative for recommended MAX9713 filtering component values.
Gain Selection
Jumpers JU2 and JU3 provide an option to select the
output voltage gain. See Table 2 for JU2 and JU3 functions. See Table 5 for power vs. gain and input levels.
Switching Frequency
The MAX9713 has two operating modes, fixed-frequency modulation (FFM) mode and spread-spectrum modulation (SSM) mode. Jumpers JU4 and JU5 control pins
FS1 and FS2. See Table 3 for JU4 and JU5 functions.
Table 1. JU1 and JU7 Functions (SHDN)
JU1 SHUNT POSITION
JU7 SHUNT POSITION
EV KIT FUNCTION
Pins 1 and 2
Installed (SHDN = high)
EV kit enabled (default)
Pins 2 and 3
Installed, without external signal (SHDN = low)
Shutdown mode
Pins 1 and 2
Not installed, with external signal connected to
SHDN pad
SHDN pin driven by external signal. Shutdown
is active low.
Table 2. JU2 and JU3 Functions (G1 and G2)
JU2 SHUNT LOCATION
JU3 SHUNT LOCATION
MAX9713 OUTPUT GAIN (dB)
Pins 1 and 2 (G1 = high)
1-2 (G2 = high)
16 (default)
Pins 1 and 2 (G1 = high)
2-3 (G2 = low)
13
Pins 2 and 3 (G1 = low)
1-2 (G2 = high)
19.1
Pins 2 and 3 (G1 = low)
2-3 (G2 = low)
22.1
Note: Make sure a shunt is installed across pins 1-2 of jumper JU1.
Table 3. JU4 and JU5 Functions (FS1 and FS2)
JU4 SHUNT LOCATION
JU5 SHUNT LOCATION
MAX9713 SWITCHING FREQUENCY
(kHz)
Pins 1 and 2 (FS1 = high)
1-2 (FS2 = high)
335 ±10%, SSM (default)
Pins 1 and 2 (FS1 = high)
2-3 (FS2 = low)
236, FFM
Pins 2 and 3 (FS1 = low)
1-2 (FS2 = high)
460, FFM
Pins 2 and 3 (FS1 = low)
2-3 (FS2 = low)
335, FFM
Note: Make sure a shunt is installed across pins 1-2 of jumper JU1.
_______________________________________________________________________________________
3
Evaluates: MAX9713
Jumper Selection
Evaluates: MAX9713
MAX9713 Evaluation Kit
Input Mode
Jumper JU6 provides an option to select between a
differential or single-ended input mode of the EV kit.
See Table 4 for JU6 functions.
Table 4. JU6 Functions
SHUNT POSITION
Not installed
Installed (VIN- pad AC-coupled
to GND)
4
EV KIT INPUT MODE
Differential input mode
(default)
Single-ended input mode
Table 5. MAX9713 Power vs. Gain and
Input Levels at 10% THD+N
GAIN (dB)
VIN DIFF RMS (V)
RL (Ω)
POUT AT 10%
THD+N (W)
13.0
1.27
16
8
16.1
0.89
16
8
19.1
0.63
16
8
22.1
0.45
16
8
13.0
0.78
8
6
16.1
0.54
8
6
19.1
0.39
8
6
22.1
0.27
8
6
_______________________________________________________________________________________
_______________________________________________________________________________________
VIN+
GND
VIN-
3
1
2
JU6
3
1
2
JU5
2
3
1
JU7
2
3
1
JU1
C10
0.47μF
C9
0.47μF
C11
0.01μF
JU3
DVDD
JU4
DVDD
FB3
DVDD
1
C8
100pF
FB2
SHDN
DVDD
JU2
DVDD
C7
100pF
C6
100pF
D1
3
R1
10kΩ
19
18
16
15
14
10
9
12
11
1
2
3
FS2
FS1
G2
G1
N.C.
17
N.C.
8
SHDN
AGND
REG
IN+
IN-
4
C4
0.1μF
VDD VDD
3
VDD
1
2
N.C.
20
U1
N.C.
25
21
22
26
N.C.
VDD VDD
MAX9713
PGND PGND
31
23
24
C1N
C1P
SS
CHOLD
N.C.
32
30
29
13
7
5
6
27
OUTOUT- 28
OUT+
OUT+
PGND PGND
N.C.
C5
0.1μF
C3
33μF
35V
4
3
C22
OPEN
T1
C12
0.47μF
VDD
OUT-
1
C1
0.1μF
C13
1μF
FB1
C21
2 OPEN
OUT+
C2
33μF
35V
FOUT1-
FOUT1+
L5
OPEN
L4
OPEN
C14
1000pF
C18
OPEN
C15
OPEN
C17
OPEN
GND
V+
R3
OPEN
C20
OPEN
C16
OPEN
FOUT2-
C19
OPEN
FOUT2+
R2
OPEN
Evaluates: MAX9713
DVDD
MAX9713 Evaluation Kit
Figure 1. MAX9713 EV Kit Schematic
5
Evaluates: MAX9713
MAX9713 Evaluation Kit
Figure 2. MAX9713 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX9713 EV Kit PCB—Component Side
Figure 4. MAX9713 EV Kit PCB—Layer 2 (GND)
Figure 5. MAX9713 EV Kit PCB—Layer 3 (VDD)
6
_______________________________________________________________________________________
MAX9713 Evaluation Kit
Evaluates: MAX9713
Figure 6. MAX9713 EV Kit PCB—Solder Side
Figure 7. MAX9713 EV Kit Component Placement Guide—
Solder Side
_______________________________________________________________________________________
7
Evaluates: MAX9713
MAX9713 Evaluation Kit
Revision History
REVISION
NUMBER
REVISION
DATE
0
—
1
2
4/05
11/07
REVISION DESCRIPTION
Initial release
PAGES
CHANGED
—
—
Update to lead-free and RoHS-compliant; various edits; replaced Figures 1–7.
—
1–7
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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