General Description

The MAX4364 evaluation kit (EV kit) is a fully assembled
and tested circuit board that uses the MAX4364 high-
power bridged amplifier to drive loudspeakers in
portable audio applications. Designed to operate from
a 2.7VDC to 5.5VDC power supply, the MAX4364 EV kit
is capable of delivering 1.4W into an 8

load.

Features

o 2.7V to 5.5V Single-Supply Operation
o Drives 1.4W into an 8 Speaker
o 0.04% THD + N at 1kHz
o Externally Adjustable Gain
o Clickless/Popless Power-Up/Down, Shutdown
o 10nA Shutdown Current
o Small 8-Pin SO Package
o Fully Assembled and Tested

Quick Start

The MAX4364 EV kit is fully assembled and tested.
Follow the steps listed below to verify board operation.
Do not turn on the power supply until all connec-
tions are completed.

Recommended Equipment

· 5V, 1A power supply

· 8

speaker

· Audio source (e.g., CD player, tape player)

Setup

1) Verify that jumper JU1 (SHDN) does not have a

shunt installed.

2) Connect the 8

speaker across the OUT+ and OUT-

pads.

3) Connect an audio source to Jack J1 (IN).

4) Connect the 5V terminal of the power supply to the

VCC pad and the ground terminal of the power sup-
ply to the GND pad.

5) Turn on the power supply.

6) Turn on the audio source.

Evaluates: MAX4364

MAX4364 Evaluation Kit

________________________________________________________________ Maxim Integrated Products

19-2503; Rev 0; 7/02

Component List

For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim's website at www.maxim-ic.com.

Ordering Information

PART

TEMP RANGE

IC PACKAGE

MAX4364EVKIT

0°C to +70°C

8 SO

DESIGNATION

QTY

DESCRIPTION

0.1µF ±10%, 16V X7R ceramic
capacitor (0603)
Taiyo Yuden EMK107BJ104KA

10µF ±20%, 6.3V X5R ceramic
capacitor (1206)
Taiyo Yuden JMK316BJ106ML

1.0µF ±10%, 6.3V X5R ceramic
capacitor (0603)
Taiyo Yuden JMK107BJ105KA

0.47µF, 35V tantalum capacitor
(case B)
Kemet T491B474K035AS

Not installed (0603)

Right-angle phono jack (red)

JU1

2-pin header

R1, R2, R3

20k

±1% resistors (0805)

100k

±5% resistor (0805)

None

Shunt (JU1)

None

MAX4364 PC board

None

MAX4364 data sheet

None

MAX4364 EV kit data sheet

MAX4364ESA (8-pin SO)

Evaluates: MAX4364

MAX4364 Evaluation Kit

_______________________________________________________________________________________

Detailed Description

The MAX4364 EV kit contains the MAX4364 high-power
bridged amplifier, designed to drive loudspeakers in
portable audio applications. The MAX4364 EV kit oper-
ates from a DC power supply that can provide 2.7V to
5.5V and 1A of current. The MAX4364 EV kit can
accept audio source inputs (IN) with peak-to-peak
amplitudes up to V

. The audio source is amplified to

drive 1.4W into an 8

speaker.

The MAX4364 EV kit has positive and negative differen-
tial outputs that are 180° out of phase and are DC offset
to V

/2. This allows the voltage at the load to see a

peak voltage of almost V

. The closed-loop gain of

the MAX4364 EV kit is configured for 2V/V, but can be
reconfigured to other gains. Refer to the Gain-Setting
Resistors section of the MAX4364/MAX4365 data sheet.
However, if the closed-loop gain is reconfigured to
greater than 10, a feedback capacitor, C5, can be
added to limit the bandwidth, or to compensate for
stray capacitance at the inverting input.

Jumper Selection

Shutdown

Jumper JU1 controls the shutdown pin (SHDN) of the
MAX4364. The shutdown function can be activated on
the MAX4364 EV kit by installing a shunt across the
pins of JU1. The shutdown function can also be con-
trolled by an external source connected to the SHDN
pad and removing the shunt on JU1 (see Table 1 for
shunt positions). Note: When measuring supply current
in shutdown mode, the bias through resistor R1 and
JU1 must be taken into account. The shutdown current
can be calculated by the following equation:

SUPPLY

RES

MAX

RES

4364

JUMPER

SHUNT POSITION

EV KIT FUNCTION

Installed (SHDN = high)

Shutdown mode

None (SHDN = low)

EV kit enabled

JU1

None. External controller
connected to SHDN pad
(TTL/CMOS input).

SHDN driven by
external controller.
Shutdown is active
high.

Table 1. JU1 Jumper Selection

Component Suppliers

SUPPLIER

PHONE

FAX

WEBSITE

Kemet

864-963-6300

864-963-6322

www.kemet.com

Taiyo Yuden

800-348-2496

847-925-0899

www.t-yuden.com

MAX4364

GND

VCC

C1
0.1

µF

C2
10

µF

VCC

OUT-

OUT+

OPEN

20k

0.47

µF

35V

R4
100k

C3
1

µF

JU2

R1
20k

GND

OUT-

OUT+

SHDN

BIAS

IN+

IN-

VCC

SHDN

JU1

Figure 1. MAX4364 EV Kit Schematic

Note: Please indicate that you are using the MAX4364 when contacting these component suppliers.

Evaluates: MAX4364

MAX4364 Evaluation Kit

Figure 2. MAX4364 EV Kit Component Placement Guide--
Component Side

Figure 3. MAX4364 EV Kit PC Board Layout--Component Side

Figure 4. MAX4364 EV Kit PC Board 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.

Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 _____________________ 3

Printed USA

is a registered trademark of Maxim Integrated Products.

Part Number MAX4364EVKIT