MAX9788EVKIT+ [MAXIM]

Delivers Greater than 14VP-P into a Ceramic Speaker;


型号：	MAX9788EVKIT+
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Delivers Greater than 14VP-P into a Ceramic Speaker
文件：	总4页 (文件大小：109K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-0714; Rev 2; 8/07

MAX9788 Evaluation Kit

Evluates:MAX978

General Description

Features

♦ 5V Single-Supply Operation

The MAX9788 evaluation kit (EV kit) is a fully assembled

and tested PCB that uses the MAX9788 Class G ampli-

fier to drive a bridge-tied-load (BTL) ceramic 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 and provides a

fully differential output capable of delivering greater

♦ Fully Differential Output

♦ Delivers Greater than 14V

into a Ceramic

P-P

Speaker

♦ Evaluates the MAX9788 in a 20-Bump UCSP

than 14V

into a ceramic speaker.

(2mm x 2.5mm) Package

P-P

♦ The MAX9788 IC Also Available in 28-Pin

Component List

(4mm x 4mm) TQFN Package

♦ Fully Assembled and Tested

DESIGNATION QTY

DESCRIPTION

0.1µF 10ꢀ, ꢁ.3V X5R ceramic

capacitors (0402)

Murata GRM155Rꢁ0J104K

C1, C2, C3

C5, Cꢁ

1µF 10ꢀ, ꢁ.3V X5R ceramic

capacitors (0402)

Murata GRM155Rꢁ0J105K

Ordering Information

PART

TEMP RANGE

IC PACKAGE

4.7µF 10ꢀ, ꢁ.3V X5R ceramic

capacitor (0ꢁ03)

Murata GRM188Rꢁ0J475K

20 UCSP-20

(2mm x 2.5mm)

MAX9788EVKIT+

0°C to +70°C*

+Denotes a lead-free and RoHS-compliant EV kit.

10µF 20ꢀ, ꢁ.3V X5R ceramic

capacitors (0ꢁ03)

*This limited temperature range applies to the EV kit PCB only.

The MAX9788 IC temperature range is -40°C to +85°C.

C8, C9, C10

Murata GRM188Rꢁ0J10ꢁM

C11, C12

JU1

Not installed, capacitors (0ꢁ03)

3-pin header

3.5mm stereo phone jack

(3-position, non-switch)

OUT

Component Suppliers

10k

Ω 0.5ꢀ precision thick-film chip

R1–R4

resistors (0ꢁ03)

Panasonic ERJ3RBD1002V

SUPPLIER

Murata Mfg. Co., Ltd.

Panasonic Corp.

PHONE

WEBSITE

770-43ꢁ-1300 www.murata.com

100k

1ꢀ resistor (0ꢁ03)

5ꢀ resistors (0805)

714-373-73ꢁꢁ www.panasonic.com

Rꢁ, R7

5.1Ω

Note: Indicate that you are using the MAX9788 when contact-

ing these component suppliers.

MAX9788EBP+ (20-bump, 4 x 5

UCSP, 2mm x 2.5mm)

—

Shunt

PCB: MAX9788EVKIT+

________________________________________________________________ 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.

MAX9788 Evaluation Kit

The EV kit accepts single-ended or a differential audio

input and provides a fully differential output. The audio

Quick Start

Recommended Equipment

input source is amplified to drive greater than 14V

into a ceramic speaker.

P-P

• 5V, 1A power supply

• Audio source (i.e., CD player, MP3 player)

Customizing the Gain

The MAX9788 EV kit is shipped with a gain of +12dB.

Change the resistors (R1–R4) to customize the gain of

the EV kit (refer to the MAX9788 IC data sheet for

details).

• One ceramic speaker (recommended suppliers:

Murata, Taiyo Yuden)

Procedure

The MAX9788 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 con-

nections are completed.

Jumper Selection

Shutdown Mode (SHDN)

Jumper JU1 controls the shutdown pin (SHDN) of the

MAX9788 IC. The shutdown pin is also 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.

1) Install a shunt across pins 1-2 of jumper JU1 (EV kit

ON).

2) Connect the ceramic speaker across the OUT- and

OUT+ pads.

3) Connect the positive terminal of the power supply to

the VCC pad and the ground terminal to the GND

pad.

Evluates:MAX978

Table 1. Shutdown Mode, JU1 Jumper

Selection

4) Connect the positive terminal of the audio source to

the IN+ pad.

MAX9788 SHDN

PIN CONNECTED

5) Connect the negative terminal of the audio source

to the IN- pad. Connect the IN- pad to GND if the

audio source is single ended.

SHUNT

POSITION

EV KIT FUNCTION

1-2*

2-3

VDD

GND

EV kit enabled

ꢁ) Connect the ground terminal of the audio source to

the GND pad.

Shutdown mode

7) Turn on the audio source.

8) Turn on the power supply.

SHDN driven by external

logic controller.

Shutdown is active low

and 1.8V logic compliant.

External logic

controller

None

Detailed Description

The MAX9788 EV kit features the MAX9788 Class G

amplifier IC, designed to drive a ceramic speaker in a

BTL configuration. The EV kit operates from a DC power

supply that provides 2.7V to 5.5V and 1A of current.

*Default position.

_______________________________________________________________________________________

MAX9788 Evaluation Kit

Evluates:MAX978

VCC

GND

CPV

10μF

0.1μF

CPGND

GND

VCC

C10

10μF

MAX9788

SHDN

0.1μF

JU1

SHDN

FB+

10kΩ

0.5%

C1P

4.7μF

OUT+

C1N

5.1Ω

OUT

1μF

C11

OPEN

10kΩ

0.5%

OUT+

IN+

IN-

IN+

OUT-

5.1Ω

IN-

OUT-

1μF

10kΩ

0.5%

FB-

10kΩ

0.5%

100kΩ

C12

OPEN

Figure 1. MAX9788 EV Kit Schematic

_______________________________________________________________________________________

MAX9788 Evaluation Kit

Evluates:MAX978

Figure 2. MAX9788 EV Kit Component Placement Guide—

Component Side

Figure 3. MAX9788 EV Kit PCB Layout—Component Side

Figure 4. MAX9788 EV Kit PCB Layout—Solder Side

Revision History

Pages changed at Rev 2: 1, 3, 4

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

is a registered trademark of Maxim Integrated Products, Inc.

CARDENAS

MAX9788EVKIT+ [MAXIM]

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