MAX9736AEVKIT [MAXIM]

Shutdown and Mute Control;


型号：	MAX9736AEVKIT
厂家：	MAXIM INTEGRATED PRODUCTS
描述：	Shutdown and Mute Control
文件：	总10页 (文件大小：249K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

19-4071; Rev 1; 9/09

MAX9736A Evaluation Kit

Evluates:/MAX9736B

General Description

Features

The MAX9736A evaluation kit (EV kit) is a fully assembled

and tested printed-circuit board (PCB) that configures

the MAX9736A Class D amplifier to drive 2 x 15W into a

pair of 8Ω speakers in stereo mode, or 1 x 30W into a

4Ω speaker in mono mode for audio applications. The

EV kit operates from an 8V to 28V DC power supply

and is configured for +17.1dB gain. The MAX9736A EV

kit accepts a pair of single-ended input signals and

provides two sets of differential outputs for speakers.

♦ 8V to 28V Single DC Power-Supply Operation

♦ Fully Differential Outputs

♦ Drives 2 x 15W into 8Ω Speakers in Stereo Mode

♦ Drives 1 x 30W into 4Ω Speaker in Mono Mode

♦ Shutdown and Mute Control

♦ Selectable Modulation Scheme

The MAX9736A EV kit provides an option to control the

shutdown, mute, modulation scheme, and mono mode

of the MAX9736A. The EV kit includes convenient audio

input and output connectors and the required output fil-

ters to ease evaluation. The MAX9736A EV kit can also

evaluate the MAX9736B after IC replacement (U1).

♦ Evaluates the MAX9736A/MAX9736B in 32-Pin

TQFN-EP Package

♦ Fully Assembled and Tested

Ordering Information

PART

TYPE

MAX9736AEVKIT+

EV Kit

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

Component List

DESIGNATION

QTY

DESCRIPTION

DESIGNATION

QTY

DESCRIPTION

OPTIONAL COMPONENTS FOR CUSTOMER

1µF 10ꢀ, 10V X7R ceramic

capacitor (0603)

MINIMAL COMPONENTS FOR CUSTOMER DESIGN

220µF 20ꢀ, 35V aluminum

electrolytic capacitor

(10mm x 12.5mm)

Murata GRM188R71A105K

Panasonic EEUFM1V221

C13–C16

C17–C26

Not installed, capacitors (0603)

0.1µF 10ꢀ, 50V X7R ceramic

capacitors (0603)

Murata GRM188R71H104K

0.15µF 10ꢀ, 50V X7R ceramic

capacitors (0805)

C3, C4, C5

Murata GRM21BR71H154K

1µF 10ꢀ, 16V X7R ceramic

capacitor (0603)

Murata GRM188R71C105K

4.3V, 20mA zener diode (SOT23)

Central CMPZ5229B

(Top Mark: C8D)

1µF 10ꢀ, 10V X7R ceramic

capacitors (0603)

Ferrite bead, 22Ω at 100MHz,

10mΩ DCR, 6A (0805)

Murata BLM21PG220SN1D

C8, C9, C10

FB1

Murata GRM188R71A105K

1µF 10ꢀ, 25V X7R ceramic

capacitors (0805)

Murata GRM21BR71E105K

FOUTL-, FOUTL+,

FOUTR-, FOUTR+,

VDD, PGND

C11, C12

R2–R5

Binding posts

20kΩ 1ꢀ resistors (0603)

JU1

JU2–JU5

JU6

3-pin header

0.1µF 10ꢀ, 50V X7R ceramic

capacitor (0603)

2-pin headers

Not installed 2-pin header

Murata GRM188R71H104K

*EP = Exposed pad.

________________________________________________________________ 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.

MAX9736A Evaluation Kit

Component List (continued)

DESIGNATION

QTY

DESCRIPTION

DESIGNATION

QTY

DESCRIPTION

R14–R18

100kΩ 5ꢀ resistors (0603)

PCB mini test points, 0.040in

(white)

L-, L+

Class D audio amplifier

(32 TQFN-EP*)

Maxim MAX9736AETJ+

RCA phono jack, side entry,

PCB mount (white)

LIN

15µH 20ꢀ, 3.1A inductors

Sumida CDRH104RNP-150NC

—

Shunts

L1–L4

R-, R+

RIN

0.250in x 0.500in,

4-40 round nylon spacers

PCB mini test points, 0.040in (red)

RCA phono jack, side entry,

PCB mount (red)

4-40 x 0.375in nylon machine

screws

—

10kΩ 5ꢀ resistor (0603)

0Ω 5ꢀ resistors (0805)

15Ω 5ꢀ resistors (1206)

—

PCB: MAX9736A Evaluation Kit+

R6–R9

R10–R13

*EP = Exposed pad.

Component Suppliers

SUPPLIER

PHONE

WEBSITE

www.centralsemi.com

www.murata-northamerica.com

www.panasonic.com

Central Semiconductor Corp.

Murata Electronics North America, Inc.

Panasonic Corp.

631-435-1110

770-436-1300

800-344-2112

847-545-6700

847-803-6100

201-785-8800

Sumida Corp.

www.sumida.com

TDK Corp.

www.component.tdk.com

www.we-online.com

Würth Electronik GmbH & Co. KG

Note: Indicate that you are using the MAX9736A or MAX9736B when contacting these component suppliers.

5) Install a shunt across jumper JU5 (MOD = high,

Quick Start

Required Equipment

Evluates:/MAX9736B

filterless modulation scheme).

6) Connect the first speaker across the FOUTL- and

FOUTL+ PCB binding posts.

•

8V to 28V, 5A DC power supply

Audio source with volume control (e.g., CD player, etc.)

Two speakers

7) Connect the second speaker across the FOUTR-

and FOUTR+ PCB binding posts.

8) Connect the positive terminal of the power supply to

the VDD binding post and the power-supply ground

terminal to the PGND binding post.

Procedures

The MAX9736A 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.

9) Connect the left output terminal of the audio source

to the LIN RCA phono jack.

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

= 5V).

10) Connect the right output terminal of the audio

source to the RIN RCA phono jack.

2) Install a shunt across jumper JU2 (SHDN = high, EV

11) Turn on the audio source at minimum volume.

12) Turn on the power supply.

kit enabled).

3) Install a shunt across jumper JU3 (REGEN = high,

internal regulator enabled).

13) Gradually increase the audio source volume until

audio is heard through the loud speakers.

4) Install a shunt across jumper JU4 (MUTE = high,

output enabled).

_______________________________________________________________________________________

MAX9736A Evaluation Kit

Evluates:/MAX9736B

The speaker wire should be connected to L+, L-, R+,

and R- test points using twisted-pair cable.

Detailed Description of Hardware

The MAX9736A EV kit is designed to evaluate the

MAX9736A in a 32-pin TQFN-EP package. The

MAX9736A is a Class D amplifier that can be config-

ured to drive 2 x 15W into a pair of 8Ω speakers, or 1 x

30W into a 4Ω speaker. The EV kit operates from a DC

power supply that provides 8V to 28V and 5A of current.

The EV kit PCB is designed with two layers and has 2oz

copper for optimized power dissipation. The MAX9736A

EV kit accepts a pair of single-ended input signals and

provides two sets of amplified differential audio outputs.

Although component selection for the output filter is

dependent on speaker-wire length, the components in

Table 1 are provided with the EV kit as a starting point.

Final component selection should be determined during

EMC testing. Contact the factory if required.

Table 1. Recommended EMI Filter

Components for 8Ω Loads

COMPONENT

DESCRIPTION

Ferrite beads, 600Ω at 100MHz, 150mΩ DCR,

2A (0805)

Würth 742792040

Optional External Preamplifier

Power Supply (VS)

R6–R9*

The MAX9736A EV kit provides an input pad to accept

an optional 5V external power supply for powering the

MAX9736A preamplifiers when the internal regulator is

disabled. Disable the internal regulator by removing the

shunt from jumper JU3 before connecting an external

power supply between the VS and AGND pads on the

MAX9736A EV kit (see Table 4). The external power

supply for the preamplifiers must be in the 4.5V to 5.5V

range. Refer to the Power Sequencing section in the

MAX9736A IC data sheet before operating with optional

external preamplifier power supply.

330pF 10ꢀ, 50V X7R ceramic capacitors

(0603)

Murata GRM188R71H331K or

TDK C1608X7R1H331K

C13-C16

*3A current-rating ferrite beads are recommended for 4Ω load

drive.

Jumper Selection

Digital Inputs Power Supply (DVDD)

The MAX9736A EV kit operates from a DC power supply

between 8V and 28V. This power-supply range is too high

for the digital input pins on the MAX9736A IC. The EV kit

includes a circuit to regulate the input power supply to 5V

for powering all the logic circuits on the EV kit. Jumper JU1

sets the DVDD voltage (see Table 2 for shunt positions).

Filtered Output

Audio analyzers typically cannot accept pulse-width-

modulated (PWM) signals at their inputs. Therefore, the

MAX9736AEV kit features a pair of lowpass filters at

each of the outputs to ease evaluation. Use the filtering

output posts (FOUTL+/FOUTL- and FOUTR+/FOUTR-)

to connect the filtered PWM outputs to the audio ana-

lyzer. The default lowpass filters at the EV kit outputs

are optimized for a pair of 8Ω speakers.

Table 2. JU1 Jumper Selection (DVDD)

SHUNT

POSITION

DVDD REGULATED

TO (V)

EV KIT DIGITAL

INPUT POWER

1-2*

2-3

Off

Filterless Output

The MAX9736A EV kit’s filterless outputs (L+/L- and

R+/R-) can be connected directly to a pair of speaker

loads without any filtering. Use the L+/L- and R+/R- test

points to connect speakers directly to the MAX9736A

outputs using twisted-pair cable. Remove inductors

L1–L4 for maximum efficiency.

*Default position.

Shutdown Mode (SHDN)

The MAX9736A features a shutdown mode to reduce

the quiescent current. Jumper JU2 controls the shut-

down (SHDN) pin of the MAX9736A IC (see Table 3 for

shunt positions).

Output Filtering Requirements

To ease evaluation, the MAX9736A EV kit is shipped with

inductor-based output filters. However, the MAX9736A can

pass EC EN55022 regulations with only ferrite-bead filters,

especially when speaker-wire lengths are less than 1m.

Table 3. JU2 Jumper Selection (SHDN)

SHUNT

POSITION

SHDN PIN

CONNECTED TO

EV KIT FUNCTION

EV kit enabled

To install the ferrite-bead filters, first remove the large

filter inductors (L1–L4). Next, replace resistors R6–R9

with ferrite beads listed in Table 1 (provided with the EV

kit), and install filter capacitors on the C13–C16 pads.

Installed*

DVDD

Not

installed

PGND

(through resistor R14)

Shutdown mode

*Default position.

_______________________________________________________________________________________

MAX9736A Evaluation Kit

Internal Regulator Enable (REGEN)

The MAX9736A provides an option to disable the internal

regulator when an optional external power supply is con-

nected to the VS and AGND pads on the EV kit to power

the MAX9736A preamplifiers. Jumper JU3 controls the

internal regulator enable (REGEN) pin on the MAX9736A

IC (see Table 4 for shunt positions). See the Optional

External Preamplifier Power Supply (VS) section.

Mono Mode (MONO)

The MAX9736A EV kit is preconfigured to stereo mode

from the factory. To change the MAX9736A EV kit to

operate in mono mode, short jumper JU6 with a short-

ing wire, connect the FOUTL- to the FOUTR- with a

short banana-lead cable, connect the FOUTL+ to the

FOUTR+ with a short banana-lead cable. Connect the

audio input source to the LIN RCA jack. In mono mode,

the right input (RIN) becomes an uncommitted inverting

op amp that can be used for filtering. Jumper JU6 con-

trols the mono mode for the MAX9736A IC (see Table 7

for shunt positions).

Mute Function (MUTE)

The MAX9736A features a mute function to mute the

audio output of the EV kit. Jumper JU4 controls the

mute (MUTE) pin of the MAX9736A IC (see Table 5 for

shunt positions).

Evaluating the MAX9736B

The MAX9736A EV kit can also evaluate the

MAX9736B. Remove the MAX9736A IC (U1) and

replace it with the MAX9736B IC. The MAX9736B IC is

pin compatible with the MAX9736A IC. The MAX9736B

Class D amplifier can drive 2 x 6W into a pair of 8Ω

speakers in stereo mode, or 1 x 12W into a 4Ω speaker

in mono mode. Refer to the MAX9736A/MAX9736B IC

data sheet for additional information.

Modulation Scheme (MOD)

The MAX9736A EV kit provides an option to select the

modulation scheme for the MAX9736A output. Jumper

JU5 controls the modulation-scheme pin (MOD) of the

MAX9736A IC (see Table 6 for shunt positions).

Table 4. JU3 Jumper Selection (REGEN)

Table 5. JU4 Jumper Selection (MUTE)

SHUNT

POSITION

REGEN PIN

CONNECTED TO

EV KIT INTERNAL

REGULATOR

SHUNT

POSITION

MUTE PIN

CONNECTED TO

AUDIO OUTPUT

Normal operation

Muted

Installed*

DVDD

Enabled

Installed*

DVDD

Not

installed

PGND

(through resistor R15)

Not

installed

PGND

(through resistor R16)

Disabled

*Default position.

Evluates:/MAX9736B

Table 6. JU5 Jumper Selection (MOD)

SHUNT POSITION

Installed*

MOD PIN CONNECTED TO

DVDD

PGND (through resistor R17)

OUTPUT MODULATION SCHEME

Filterless modulation

Not installed

Classic pulse-width modulation (PWM)

*Default position.

Table 7. JU6 Jumper Selection (MONO)

MONO PIN CONNECTED

SHUNT POSITION

OUTPUT SPEAKER MODE

AUDIO INPUT SOURCE CONNECTED TO

PGND

(through resistor R18)

Not installed*

Stereo mode

Mono mode

LIN and RIN

LIN

Install a shorting wire

*Default position.

DVDD

(RIN is an uncommitted inverting op amp)

_______________________________________________________________________________________

MAX9736A Evaluation Kit

Evluates:/MAX9736B

Figure 1. MAX9736A Customer Design Schematic

_______________________________________________________________________________________

MAX9736A Evaluation Kit

Evluates:/MAX9736B

Figure 2. MAX9736A EV Kit Schematic

_______________________________________________________________________________________

MAX9736A Evaluation Kit

Evluates:/MAX9736B

Figure 3. MAX9736A EV Kit Component Placement Guide—Component Side

_______________________________________________________________________________________

MAX9736A Evaluation Kit

Evluates:/MAX9736B

Figure 4. MAX9736A EV Kit PCB Layout—Component Side

_______________________________________________________________________________________

MAX9736A Evaluation Kit

Evluates:/MAX9736B

Figure 5. MAX9736A EV Kit PCB Layout—Solder Side

_______________________________________________________________________________________

MAX9736A Evaluation Kit

Revision History

REVISION REVISION

PAGES

CHANGED

DESCRIPTION

NUMBER

DATE

3/08

Initial release

Changed part number for C6 and replaced Figures 1–5

—

9/09

1, 2

Evluates:/MAX9736B

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.

10 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600

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

MAX9736AEVKIT [MAXIM]

相关型号：

MAX9736AEVKIT+

MAX9736B

MAX9736BETJ

MAX9736BETJ+

MAX9736BETJ+T

MAX9736BETJ/V

MAX9736BETJ/V+

MAX9736BETJ/V+T

MAX9736DETJ

MAX9736DETJ+

MAX9736DETJ/V

MAX9736DETJ/V+