MAX9830AEVKIT [MAXIM]
Differential or Single-Ended Input;
| 型号： | MAX9830AEVKIT |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Differential or Single-Ended Input |
| 文件： | 总4页 (文件大小：905K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-4926; Rev 0; 8/09
MAX9830A Evaluation Kit
General Description
Features
S Industry-Leading Quiescent Current
1.6mA (V = 5V), 1.2mA (V = 3.6V)
The MAX9830A evaluation kit (EV kit) is a fully assembled
and tested circuit board that uses the MAX9830A filter-
less Class D amplifier to drive a mono bridge-tied-load
(BTL) speaker in portable audio applications. Designed
to operate from a 2.6V to 5.5V DC power supply, the EV
kit is capable of delivering 2W into a 4I load. The EV
kit accepts differential or single-ended input signals.
The MAX9830A EV kit also evaluates the MAX9830B–
MAX9830E.
DD
DD
S Filterless Operation Passes EN55022B-Radiated
Emissions with Up to 24in (61cm) of Speaker
Cable
S Evaluates the MAX9830B–MAX9830E
(with IC Replacement)
S 2.6V to 5.5V Single-Supply Operation
S 2W Mono Class D Output
S Differential or Single-Ended Input
S Low-Power Shutdown Input
S Fully Assembled and Tested
Ordering Information
PART
TYPE
MAX9830AEVKIT+
EV Kit
+Denotes lead(Pb)-free and RoHS compliant.
Component List
DESIGNATION QTY
DESCRIPTION
DESIGNATION QTY
DESCRIPTION
REQUIRED COMPONENTS
REQUIRED COMPONENTS
JU1
JU2
1
1
0
2
3-pin header
0.1FF Q10%, 25V X7R ceramic
capacitor (0603)
Murata GRM188R71E104K
TDK C1608X7R1E104K
2-pin header
C1
1
L1, L2
L3, L4
Not installed, inductors
0I resistors (0805)
10FF Q20%, 6.3V X5R ceramic
capacitor (0603)
Murata GRM188R60J106M
TDK C1608X5R0J106M
Ferrite bead, 100I at 100MHz,
50mI DCR, 3A (0603)
TDK MPZ16085101A
L5
1
C2
1
0
2
OUT-, OUT+,
R1, R2
2
2
Test points
Not installed, ceramic capacitors
(0603)
22I Q5% resistors (0603)
C3, C4
C5, C6
Mono Class D amplifier (8 TDFN)
Maxim MAX9830AETA+
U1
—
—
1
2
1
0.47FF Q10%, 10V X7R ceramic
capacitors (0603)
TDK C1608X7R1A474K
Murata GRM188R61A474K
Shunts
PCB: MAX9830A EVALUATION KIT+
0.22FF Q10%, 25V X7R ceramic
capacitors (0603)
Murata GRM188R71E224K
TDK C1608X7R1E224K
OPTIONAL COMPONENTS
C7–C11
5
22FH Q20%, 0.7A inductors
L1, L2
2
TOKO A915AY-220M
_______________________________________________________________ Maxim Integrated Products
1
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.
MAX9830A Evaluation Kit
Component Suppliers
SUPPLIER
Murata Electronics North America, Inc.
TDK Corp.
PHONE
WEBSITE
www.murata-northamerica.com
www.component.tdk.com
www.tokoam.com
770-436-1300
847-803-6100
847-297-0070
TOKO America, Inc.
Note: Indicate that you are using the MAX9830A when contacting these component suppliers.
Quick Start
Recommended Equipment
Detailed Description of Hardware
The MAX9830A EV kit features the MAX9830A filterless
Class D amplifier IC, designed to drive a BTL mono
speaker in portable audio applications. The EV kit oper-
ates from a DC power supply that provides 2.6V to 5.5V
and 1A of current. The EV kit accepts a differential or
single-ended audio input. The audio input source is
amplified to drive 2W into a 4I speaker.
U 2.6V to 5.5V, 1A DC supply
U 4I speaker
U Mono audio signal source
Procedure
The MAX9830A 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.
The EV kit provides two sets of differential outputs. The
device outputs (OUT+, OUT-) can be connected directly to
a speaker load, without any filtering, with up to 24in (61cm)
of cable. However, a filter can be added to ease evaluation.
1) Verify that shunts are installed as follows:
JU1: Pins 1-2 (device enabled)
Speaker Amplifier Shutdown
Jumper JU1 enables or disables the speaker amplifier.
See Table 1 for jumper JU1 configuration.
JU2: Installed (single-ended input)
2) Set the power-supply output to 5V.
3) Disable the power-supply output.
Input Mode
Jumper JU2 provides the option to select between a dif-
ferential or single-ended input mode for the EV kit. See
Table 2 for JU2 configuration.
4) Connect the power-supply ground to the GND pad
and the power-supply positive output to the VDD
pad on the EV kit.
5) Verify that the audio source output is disabled.
Table 1. Shutdown Input (JU1)
6) Connect the mono audio source between the
INPUT+ and INPUT- pads on the EV kit.
SHUNT
AMPLIFIER
SHDN PIN
POSITION
7) Connect the speaker across the OUT+ and OUT-
test points.
1-2*
Connected to VDD
Connected to GND
Enabled
Disabled
2-3
8) Enable the power-supply output.
9) Enable the audio source.
*Default position.
Table 2. JU2 Settings
SHUNT
POSITION
10) Verify that the speaker is playing the audio source
signal.
INPUT
MODE
IN- PIN
Single-
ended input
Installed*
Connected to GND
Connected to user-supplied
negative differential input
Differential
input
Not installed
*Default position.
2
______________________________________________________________________________________
MAX9830A Evaluation Kit
pulse-width-modulated (PWM) waveform at their inputs.
The lowpass filter extracts the audio content from the
PWM output signal and allows the device to be con-
nected directly to an audio analyzer. The PWM output
signal can be lowpass filtered by installing 22µH 20%,
0.7A inductors (TOKO A915AY-220M) at L1 and L2. The
filtered outputs should then be monitored at the FOUT+
and FOUT- pads.
Optional Output Filtering
The MAX9830A is designed to pass EN55022B emis-
sions standards without any filtering when using up to
61cm of cable to connect the speaker. When evaluating
the MAX9830A without any filtering, connect the speaker
to the outputs (OUT+, OUT-).
The MAX9830A EV kit also features PCB pads for a low-
pass filter that can be added to ease evaluation. Audio
analyzers typically cannot accept the Class D amplifier’s
Figure 1. MAX9830A EV Kit Schematic
_______________________________________________________________________________________
3
MAX9830A Evaluation Kit
1.0”
1.0”
Figure 2. MAX9830A EV Kit Component Placement Guide—
Component Side
Figure 3. MAX9830A EV Kit PCB Layout—Component Side
1.0”
Figure 4. MAX9830A EV Kit PCB Layout—Solder Side
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.
4
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
2009 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.
©
相关型号：
©2020 ICPDF网 联系我们和版权申明