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MAX98500 Evaluation Kit

Evaluates: MAX98500

General Description

The MAX98500 evaluation kit (EV kit) is a fully assembled

and tested circuit board that uses the MAX98500 boost-

ed Class D amplifier to drive a mono bridge-tied-load

(BTL) speaker in portable audio applications. Designed

to operate from a 2.5V to 5.5V DC power supply, the EV

kit delivers 2.2W into an 8I load. The EV kit accepts

differential or single-ended input signals, features three

selectable gain settings (6dB, 15.5dB, and 20dB), and

provides separate speaker and boost shutdown inputs.

Features

S 2.5V to 5.5V Single-Supply Operation

S Output Power: 2.2W into 8ω, 10% THD+N

S Selectable Gain Settings (6dB, 15.5dB, and 20dB)

S Boosted Class D Output

S Differential or Single-Ended Input Signals

S Boost Converter Shutdown

S Speaker Output Shutdown

S Fully Assembled and Tested

Ordering Information

Component List

19-5221; Rev 0; 5/10

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

PART TYPE

MAX98500EVKIT+ EV Kit

DESIGNATION QTY DESCRIPTION

REQUIRED COMPONENTS

C1 1

10FF Q10%, 6.3V X7R ceramic

capacitor (0805)

Murata GRM21BR70J106K

TDK C2012X7R0J106K

C2 1

22FF Q20%, 16V X5R ceramic

capacitor (1206)

Murata GRM31CR61226M

Taiyo Yuden EMK316BJ226M

C3, C4 2

1FF Q10%, 25V X7R ceramic

capacitors (0603)

Murata GRM188R71E105K

Murata GRM188R71E105M

C5 1

22FF Q10%, 6.3V X5R ceramic

capacitor (0805)

Murata GRM21BR60J226M

TDK C2012X5R0J226K

C8 1

0.1FF Q10%, 16V X7R ceramic

capacitor (0402)

Murata GRM155R71C104K

TDK C1005X7R1C104K

C9, C10 0

Not installed, ceramic capacitors

(0402)

C12, C13 0

Not installed, ceramic capacitors

(0603)

DESIGNATION QTY DESCRIPTION

C14–C18 5

0.22FF Q10%, 25V X7R ceramic

capacitors (0603)

Murata GRM188R71E224K

TDK C1608X7R1E224K

FB1 1

0I resistor (0603)

FB2, FB3 0 Not installed, ferrite beads (0603)

J1 1

Phono jack, black (side-entry

PCB mount)

JU1, JU2, JU3 3 3-pin headers

JU4 1 2-pin header

L1 1

2.2FH, 34mI, 4.5A inductor

TOKO FDV0530S-2R2M

(5mm x 5mm x 3mm)

TDK LTF5022T-2R2N3R2-LC

(5mm x 5mm x 2.2mm)

NEC MPLC0525L2R2

(5.2mm x 6.2mm x 2.5mm)

L2, L3 0

Not installed, inductors

TOKO A916CY-220M (provided

with EV kit)

OUT-, OUT+,

PGND, RKNEE

4 Test points

R1 1

27.4kω Q1% resistor (0603)

R2, R3 2

22ω Q5% resistors (0603)

Summary of content (6 pages)

PAGE 1
9-5221; Rev 0; 5/10 MAX98500 Evaluation Kit The MAX98500 evaluation kit (EV kit) is a fully assembled and tested circuit board that uses the MAX98500 boosted Class D amplifier to drive a mono bridge-tied-load (BTL) speaker in portable audio applications. Designed to operate from a 2.5V to 5.5V DC power supply, the EV kit delivers 2.2W into an 8I load. The EV kit accepts differential or single-ended input signals, features three selectable gain settings (6dB, 15.
PAGE 2
Evaluates: MAX98500 MAX98500 Evaluation Kit Component List (continued) DESIGNATION QTY U1 DESCRIPTION DESIGNATION 1 VCCOUT 0 Not installed, test point — 4 Shunts — 1 PCB: MAX98500 EVALUATION KIT+ QTY DESCRIPTION OPTIONAL COMPONENTS Boosted Class D amplifier (16 WLP) Maxim MAX98500EWE+ L2, L3 22FH Q20%, 0.7A inductors (D63CB) TOKO A916CY-220M 2 Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.
PAGE 3
MAX98500 Evaluation Kit Optional Output Filtering The MAX98500 speaker amplifier is designed to pass FCC emissions standards without any filtering. When evaluating the MAX98500 without any filtering, connect the speaker to the output test points (OUT+, OUT-). Shutdown Inputs Jumper JU4 provides the option to select between a differential or single-ended input mode for the EV kit. See Table 3 for JU4 configuration.
PAGE 4
Evaluates: MAX98500 MAX98500 Evaluation Kit Figure 1.
PAGE 5
MAX98500 Evaluation Kit Figure 2. MAX98500 EV Kit Component Placement Guide— Component Side 1.0” Figure 3. MAX98500 EV Kit PCB Layout—Component Side 1.0” Figure 4. MAX98500 EV Kit PCB Layout—Solder Side _______________________________________________________________________________________ 5 Evaluates: MAX98500 1.
PAGE 6
MAX98500 Evaluation Kit Evaluates: MAX98500 Revision History REVISION NUMBER REVISION DATE 0 5/10 DESCRIPTION Initial release PAGES CHANGED — 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.