MAX98303 [MAXIM]

Evaluation Kit; 评估套件


型号：	MAX98303
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Evaluation Kit 评估套件
文件：	总6页 (文件大小：839K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-5599; Rev 0; 10/10

MAX98303 Evaluation Kit

General Description

Features

Sꢀ 2.6V_to_5.5V_Single-Supply_Operation

Sꢀ Delivers_3.1W_Into_a_4I_Load

The MAX98303 evaluation kit (EV kit) is a fully assembled

and tested PCB that evaluates the MAX98303 stereo

3.1W Class D amplifier in a 16-bump, 0.4mm pitch

wafer-level package (WLP). The EV kit operates from

a single 2.6V to 5.5V DC power supply and is capable

of delivering 3.1W into a 4I load. The EV kit accepts

a differential or single-ended audio input and provides

differential outputs for the speaker. The device outputs

can be connected directly to a speaker load for filterless

applications; however, a filter can be added to ease

evaluation.

Sꢀ Single-Ended_or_Differential_Audio_Input

Sꢀ Five_Selectable_Gains

Sꢀ Filterless_Operation

Sꢀ Optional_Class_D_Output_Filters_for_Ease_of_

Evaluation

Sꢀ Low-Power_Shutdown_Input

Sꢀ Fully_Assembled_and_Tested

Ordering Information

PART

TYPE

MAX98303EVKIT+

EV Kit

+Denotes lead(Pb)-free and RoHS compliant.

Component List

DESIGNATION

QTY

DESCRIPTION

DESIGNATION

QTY

DESCRIPTION

3-pin header

JU2

JU3

0.1FF Q10%, 16V X7R

5-pin header

ceramic capacitor (0402)

Murata GRM155R71C104K

TDK C1005X7R1C104K

Not installed, inductors—PCB

short

L1–L4

OUTL+, OUTL-,

OUTR+, OUTR-

10FF Q10%, 6.3V X7R

Test points

ceramic capacitor (0805)

Murata GRM21BR70J106K

TDK C2012X7R0J106K

R1, R2

R3–R6

100kI Q5% resistors (0603)

Not installed, resistors (0603)

2.6W Class D amplifier

(16 WLP)

Maxim MAX98303EWE+

1FF Q10%, 25V X7R ceramic

capacitors (0603)

Murata GRM188R71E105K

Murata GRM188R71E105M

C3, C4, C17, C18

—

Shunts (JU1–JU4)

Not installed, capacitors

(0603)

PCB: MAX98303

EVALUATION KIT+

C5–C16, C19, C20

FB1–FB4

OPTIONAL_COMPONENTS

0I resistors (0603)

FOUTL+, FOUTL-,

FOUTR+, FOUTR-,

GND, VDD

0.22FF Q10%, 25V X7R

ceramic capacitors (0603)

Murata GRM188R71E224K

TDK C1608X7R1E224K

Binding posts

C7–C16

White phono jack

(side-entry PCB mount)

INL

22FH Q20%, 1A inductors

TOKO A916CY-220M

L1–L4

R3–R6

Red phono jack

(side-entry PCB mount)

INR

22I Q5% resistors (0603)

JU1, JU4

2-pin headers

_ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ _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.

MAX98303 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 MAX98303EWE+when contacting these component suppliers.

Quick Start

Detailed Description of Hardware

Recommended Equipment

Filterless Output

The MAX98303 EV kit’s filterless outputs (OUTL+,

OUTL-, OUTR+, and OUTR-) can be connected directly

to a speaker load without any filtering. Use the OUTL+

and OUTL- test points or the OUTR+ and OUTR- test

points to connect the speaker directly to the device

output.

• MAX98303 EV kit

• 2.6V to 5.5V, 2A DC power supply

• Stereo audio input

• Two 4I speakers

Procedures

The 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.

Filtered Output

Audio analyzers typically cannot accept the Class D

amplifier’s pulse-width modulated (PWM) signals at their

inputs. Therefore, the EV kit features optional lowpass

filters at the outputs to ease evaluation. As shipped, the

EV kit’s lowpass filter RC components are unpopulated

and inductors L1–L4 are shorted on the PCB.

1) Verify that shunts are installed as follows:

JU1, JU4: Installed (single-ended input)

JU2:

JU3:

Pins 1-2 (device enabled)

Pins 1-3 (12dB gain)

To use the filtered output posts (FOUTL+, FOUTL-,

FOUTR+, and FOUTR-), remove the shorts on L1–L4

and install components L1–L4, C7–C16, and R3–R6

(provided separately with the EV kit). Use the output

posts to connect the filtered outputs to the audio

analyzer. The default lowpass filters at the EV kit output

are optimized for an 8I speaker.

2) Set the power-supply output to 5V. Disable the

power supply.

3) Connect the power-supply ground terminal to the

GND pad and the power-supply positive terminal to

the VDD pad of the EV kit.

Jumper Selection

4) With the audio source disabled, connect the left

channel of the audio source to the INL+ pad.

Single-Ended/Differential Audio Inputs

The EV kit features jumpers JU1 and JU4 to select

between a differential or single-ended input mode. See

Table 1 for JU1 and JU4 configuration.

5) Connect the right channel of the audio source to the

INR+ pad.

6) Connect the audio source ground to the GND test

pad.

Table_1._JU1_and_JU4_Jumper_Selection

7) Connect the first speaker across the OUTL+ and

OUTL- test points.

SHUNT_

POSITION

DEVICE_

OPERATION

INꢀ-_PIN

8) Connect the second speaker across the OUTR+

and OUTR- test points.

Single-ended

input

Installed*

AC-grounded

9) Enable the power-supply output.

10) Enable the audio source.

AC-coupled to a

user-supplied

negative differential input

Differential

input

Not installed

11) Verify that the speakers are playing the audio

source signal.

*Default position.

2_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ

MAX98303 Evaluation Kit

Shutdown Input (SHDN)

The EV kit features 3-pin jumper JU2 to control the

active-low shutdown input. Drive SHDN high to place the

device in normal operation; drive SHDN low to place the

device in the low-power shutdown mode. See Table 2 for

shunt positions.

Table_3._JU3_Jumper_Selection_(GAIN)

SHUNT_

POSITION

MAXIMUM_

GAIN_(dB)

GAIN_PIN

Connected to PVDD through

1-2

1-3*

1-4

100kI resistor R1

Connected to PVDD

Selectable Gain (GAIN)

The EV kit features 5-pin jumper JU3 to control the

device’s five programmable gain settings. See Table 3

for gain-control configuration.

Connected to GND through

100kI resistor R2

1-5

Connected to GND

Not

installed

Unconnected

Table_2._JU2_Jumper_Selection_(SHDN)

*Default position.

SHUNT_

POSITION

DEVICE_

OPERATION

SHDN_PIN

1-2*

2-3

Connected to PVDD

Connected to GND

Normal operation

Shutdown mode

*Default position.

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MAX98303 Evaluation Kit

Figure 1. MAX98303 EV Kit Schematic

4_ _ _ꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀꢀ

MAX98303 Evaluation Kit

1.0”

Figure 2. MAX98303 EV Kit Component Placement Guide—

Component Side

Figure 3. MAX98303 EV Kit PCB Layout—Component Side

1.0”

Figure 4. MAX98303 EV Kit PCB Layout—Solder Side

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MAX98303 Evaluation Kit

Revision History

REVISION

NUMBER

REVISION_

DATE

PAGES_

CHANGED

DESCRIPTION

10/10

Initial release

—

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.

6_____________________ ________ Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

2010 Maxim Integrated Products

Maxim is a registered trademark of Maxim Integrated Products, Inc.

MAX98303 [MAXIM]

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