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General Description

The MAX9737 evaluation kit (EV kit) is a fully assembled

and tested PCB that configures the MAX9737 mono 7W

Class D amplifier to drive an 8Ω speaker for audio

applications. The EV kit operates from an 8V to 28V DC

power supply and is configured for +13.6dB gain. The

MAX9737 EV kit accepts a single-ended input signal

and provides differential outputs for the speaker.

Features

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

♦ Differential Outputs

♦ Configured for +13.6dB Gain

♦ External Gain-Setting Resistors

♦ Class D Output Filter for Ease of Evaluation

♦ Delivers 7W into an 8Ω Speaker

♦ Mute Control

♦ Lead(Pb)-Free and RoHS Compliant

♦ Fully Assembled and Tested

Evaluates: MAX9737

MAX9737 Evaluation Kit

________________________________________________________________

Maxim Integrated Products

19-4404; Rev 0; 12/08

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.

Ordering Information

PART TYPE

MAX9737EVKIT+ EV Kit

Denotes lead(Pb)-free and RoHS compliant.

Component List

DESIGNATION QTY DESCRIPTION

C1–C4 4

1µF ±10%, 50V X7R ceramic

capacitors (0805)

Murata GRM21BR71H105K

TDK C2012X7R1H105K

C5 1

0.1µF ±10%, 50V X7R ceramic

capacitor (0603)

Murata GRM188R71H104K

TDK C1608X7R1H104K

C6 1

0.47µF ±10%, 25V X7R ceramic

capacitor (0603)

Murata GRM188R71E474K

TDK C1608X7R1E474K

C7, C8, C9, C18 4

1µF ±10%, 10V X7R ceramic

capacitors (0603)

Murata GRM188R61A105K

TDK C1608X7R1A105K

C10, C11 0 Not installed, capacitors (0603)

C12–C16 5

0.15µF ±10%, 50V X7R ceramic

capacitors (0805)

Murata GRM21BR71H154K

TDK C2012X7R1H154K

DESIGNATION QTY DESCRIPTION

C17 1

100µF ±20%, 50V aluminum

electrolytic capacitor (8mm x

11.5mm)

Panasonic EEUFM1H101

SANYO 50ME100CA

D1 1

4.3V, 20mA zener diode (SOT23)

Central Semi CMPZ5229B

(Top Mark: C8D)

FB1 1

Ferrite bead, 22Ω at 100MHz,

10mΩ DCR, 6A (0805)

Murata BLM21PG220SN1D

FOUT+, FOUT-,

PGND, VDD

Binding posts

Johnson 111-2223-001

Mouser 530-111-2223-001

IN 1

Phono jack, side entry, PCB

mount (white)

CUI Inc. RCJ-043

JU1 1 2-pin header

JU2 1 3-pin header

L1, L2 2

15µH ±20%, 3.1A inductors

Sumida CDRH104RNP-150NC

Summary of content (7 pages)

PAGE 1
9-4404; Rev 0; 12/08 MAX9737 Evaluation Kit The MAX9737 evaluation kit (EV kit) is a fully assembled and tested PCB that configures the MAX9737 mono 7W Class D amplifier to drive an 8Ω speaker for audio applications. The EV kit operates from an 8V to 28V DC power supply and is configured for +13.6dB gain. The MAX9737 EV kit accepts a single-ended input signal and provides differential outputs for the speaker.
PAGE 2
Evaluates: MAX9737 MAX9737 Evaluation Kit Component List (continued) DESIGNATION QTY DESCRIPTION DESIGNATION QTY 1 100kΩ ±5% resistor (0603) DESCRIPTION OUT+, OUT-, PC 3 PCB mini test points, 20mA Keystone 5000 R8 R1, R2 2 20kΩ ±1% resistors (0603) U1 1 R3, R4 2 0Ω ±5% resistors (0805) Mono 7W Class D amplifier (24 TQFN-EP*) Maxim MAX9737ETJ+ R5, R6 2 15Ω ±5% resistors (1206) — 1 PCB: MAX9737 Evaluation Kit+ R7 1 10kΩ ±5% resistor (0603) *EP = Exposed pad.
PAGE 3
MAX9737 Evaluation Kit Filterless Output The MAX9737 EV kit’s filterless outputs (OUT+, OUT-) can be connected directly to a speaker load without any filtering. Use the OUT+ and OUT- test points to connect the speaker directly to the MAX9737 output using twisted-pair cable. Remove inductors L1 and L2 for maximum efficiency. Output Filtering Requirements To ease evaluation, the MAX9737 EV kit is shipped with inductor-based output filters.
PAGE 4
Evaluates: MAX9737 MAX9737 Evaluation Kit Figure 1.
PAGE 5
MAX9737 Evaluation Kit Evaluates: MAX9737 Figure 2.
PAGE 6
Evaluates: MAX9737 MAX9737 Evaluation Kit Figure 3.
PAGE 7
MAX9737 Evaluation Kit Evaluates: MAX9737 Figure 4. MAX9737 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.