MAX9730EVKIT+ [MAXIM]
Configurable Switching Frequency;
| 型号： | MAX9730EVKIT+ |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Configurable Switching Frequency |
| 文件： | 总4页 (文件大小：102K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-0751; Rev 0; 2/07
MAX9730 Evaluation Kit
Evluates:MAX9730
General Description
Features
ꢀ 5V Single-Supply Operation
The MAX9730 evaluation kit (EV kit) is a fully assembled
and tested PCB that uses the MAX9730 Class G power
amplifier to drive a bridge-tied-load (BTL) speaker in
portable audio applications. Designed to operate from
a 2.7V to 5.5VDC power supply, the EV kit accepts a
single-ended or differential input signal. The EV kit pro-
vides a fully differential output capable of delivering
2.4W into an 8Ω speaker.
ꢀ Fully Differential Output
ꢀ Delivers 2.4W into an 8Ω Speaker
ꢀ Configurable Switching Frequency
ꢀ Evaluates the MAX9730 in a 28-Pin TQFN (4mm x
4mm x 0.8mm) Package
ꢀ MAX9730 IC Available in a 20-Bump UCSP (2mm x
2.5mm) Package
ꢀ Fully Assembled and Tested
Component List
Ordering Information
DESIGNATION QTY
DESCRIPTION
PART
TEMP RANGE
IC PACKAGE
0.1µF 10ꢀ, ꢁ.3V X5R ceramic
capacitors (0402)
Murata GRM155Rꢁ0J104K
28 TQFN-EP**
(4mm x 4mm x 0.8mm)
MAX9730EVKIT+
0°C to +70°C*
C1–C4
C5, Cꢁ
C7
4
2
1
+Denotes a lead-free and RoHS-compliant EV kit.
1µF 10ꢀ, ꢁ.3V X5R ceramic
capacitors (0402)
Murata GRM155Rꢁ0J105K
*This limited temperature range is for the EV kit PCB only. The
MAX9730 IC temperature range is -40°C to +85°C.
**EP = Exposed paddle.
4.7µF 10ꢀ, ꢁ.3V X5R ceramic
capacitor (120ꢁ)
Murata GRM31CRꢁ0J475K
Quick Start
Recommended Equipment
10µF 20ꢀ, ꢁ.3V X5R ceramic
capacitors (0ꢁ03)
Murata GRM188Rꢁ0J10ꢁM
•
•
•
5V, 2A power supply
C8, C9, C10
JU1
3
1
4
Audio source (i.e., CD player, MP3 player, etc.)
One 8Ω speaker
3-pin header
10kΩ 0.5ꢀ precision-thick
film-chip resistors (0ꢁ03)
Panasonic ERJ3RBD1002V
Procedure
R1–R4
The MAX9730 EV kit is fully assembled and tested.
Follow the steps listed below to verify board operation.
Caution: Do not turn on the power supply until all
connections are completed.
R5
U1
1
1
100kΩ 1ꢀ resistor (0ꢁ03)
MAX9730ETI+ (28-pin TQFN, 4mm
x 4mm x 0.8mm)
1) Install a shunt across pins 1-2 of jumper JU1 (EV kit ON).
2) Connect the 8Ω speaker across the OUT- and
—
—
1
1
Shunt
OUT+ pads.
PCB: MAX9730 evaluation kit
3) Connect the ground terminal of the power supply to
the GND pad and the positive terminal to the VCC pad.
4) Connect the positive terminal of the audio source to
the IN+ pad.
Component Suppliers
SUPPLIER
PHONE
WEBSITE
5) Connect the negative terminal of the audio source
to the IN- pad. Connect the IN- pad to the GND
pad if the audio source is single-ended.
Murata Mfg. Co., Ltd. 770-43ꢁ-1300 www.murata.com
Panasonic Corp. 714-373-73ꢁꢁ www.panasonic.com
ꢁ) Connect the ground terminal of the audio source to
the GND pad.
Note: Indicate that you are using the MAX9730 when
contacting these component suppliers.
7) Turn on the audio source.
8) Turn on the power supply.
________________________________________________________________ Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.
MAX9730 Evaluation Kit
Jumper Selection
Detailed Description
Shutdown Mode (SHDN)
Jumper JU1 controls the shutdown pin (SHDN) of the
MAX9730 IC. The shutdown pin can also be controlled
by an external logic controller connected to the EV kit
SHDN pad. Remove the shunt from jumper JU1 before
connecting an external controller to the SHDN pad. See
Table 1 for shunt positions.
The MAX9730 EV kit features the MAX9730 Class G
power amplifier IC, designed to drive a dynamic speak-
er in BTL configuration. The EV kit operates from a DC
power supply that provides 2.7V to 5.5V and 2A of cur-
rent. The EV kit accepts single-ended or differential
audio input and provides a fully differential output. The
audio input source is amplified to drive 2.4W into an 8Ω
speaker with a 5V power supply.
Table 1. JU1 Jumper Selection
(Shutdown Mode)
Customizing the Gain
The MAX9730 EV kit is shipped with a gain of +12dB
and is set by resistors R1–R4. Change resistors R1–R4 to
reconfigure the gain of the EV kit. Refer to the MAX9730
IC data sheet for more detail.
SHUNT
SHDN PIN
EV KIT FUNCTION
POSITION CONNECTED TO
1-2*
2-3
VDD
GND
EV kit enabled
Shutdown mode
Charge-Pump Frequency Set Resistor
The charge-pump frequency is set by resistor R5. The
charge pump’s normal operation frequency is 330kHz.
Change R5 to change the charge-pump frequency.
Refer to the MAX9730 IC data sheet for more information.
SHDN driven by external
logic controller. Shutdown is
active-low and is 1.8V logic
compliant.
External logic
controller
None
Evluates:MAX9730
*Default position.
2
_______________________________________________________________________________________
MAX9730 Evaluation Kit
Evluates:MAX9730
VCC
VCC
VCC
GND
14
22
4
V
V
CPV
DD
CC
C9
10µF
28
27
N.C.
C8
10µF
C2
0.1µF
C1
0.1µF
CC
CPGND
18
GND
24
PV
SS
VCC
C10
10µF
1
2
U1
SHDN
JU1
1
15
21
SHDN
FB+
SV
SV
SS
3
MAX9730
SS
C3
C4
12
0.1µF
0.1µF
R1
10kΩ
0.5%
R2
10kΩ
0.5%
3
C1P
C5
1µF
IN+
IN-
C7
4.7µF
10
IN+
26
20
C1N
R3
10kΩ
0.5%
C6
1µF
OUT+
OUT+
9
7
IN-
OUT-
16
13
OUT-
FS
FB-
R4
10kΩ
0.5%
R5
N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C. N.C.
11 17 19 23 25
100kΩ
2
5
6
8
1%
Figure 1. MAX9730 EV Kit Schematic
_______________________________________________________________________________________
3
MAX9730 Evaluation Kit
Evluates:MAX9730
Figure 2. MAX9730 EV Kit Component Placement Guide—
Component Side
Figure 3. MAX9730 EV Kit PCB Layout—Component Side
Figure 4. MAX9730 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
© 2007 Maxim Integrated Products
is a registered trademark of Maxim Integrated Products, Inc.
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