MAX1583 Evaluation Kit

2

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Recommended Equipment

•0 to +6V at 1A, variable-output power supply

• Two digital multimeters (DMMs)

Quick Start

The MAX1583 EV kit is fully assembled and tested.

Perform the following steps to verify board operation:

1) Verify that shunts are across pins 2 and 3 of

jumpers JU1 (EN2) and JU2 (EN1). This places the

MAX1583 into shutdown mode.

2) Verify that JU3 is open.

3) Preset the power supply to 2.7V and turn off. Do

not turn on the power supply until all connec-

tions are completed.

4) Connect the positive lead of the power supply to the

VIN pad on the EV kit PC board. Connect the

ground lead of the power supply to the GND pad on

the EV kit PC board.

5) Connect the positive lead of one DMM to the OUT

pad on the EV kit PC board and connect the nega-

tive lead of the DMM to the GND pad. This DMM

6) Connect the positive lead of the other DMM to POK

on the EV kit PC board and connect the negative

lead of the DMM to the GND pad. This DMM mea-

7) Turn on the power supply.

8) Verify that the white LED module is off.

9) Remove the shunt on JU2 and place it between

pins 1 and 2 of JU2. This places the MAX1583 into

movie mode.

should read approximately 7V.

11) Sweep the input voltage from 2.7V to 5.5V, verifying

that the LED module remains on with constant

12) Set the power supply to 2.7V.

13) Remove the shunt on JU2 and place it between

pins 1 and 2 of JU3. Remove the shunt on JU1 and

place it between pins 1 and 2 of JU1. This places

the MAX1583 into precharge mode.

14) Verify that the white LED module is off. Verify that

mately 2.7V.

15) Sweep the power supply to 5.5V. Verify that the LED

16) Set the power supply to 3.3V.

17) Push the button on the bottom of the EV kit. This

enables a strobe/flash.

18) Verify that the LED module flashes.

Detailed Description

Jumper Selection

EN1 and EN2 on the MAX1583 provide control for shut-

down mode, movie mode, precharge mode, and strobe

mode. Jumpers JU1 and JU2 connect EN2 and EN1 to

be used to drive EN1 or EN2 by removing the corre-

sponding shunt completely from the jumper and con-

necting the external signal to the appropriate connect-

ing pad. JU3 enables the pulse generator for the strobe

mode. JU3 must be open if a jumper is installed on

JU2 or if EN1 is externally driven.

Setting LED Current

The preset LED current in movie mode is 20mA. To set

a different movie-mode LED current, change R2, where

movie-mode currents up to 100mA.

The preset LED current in strobe mode is 100mA. To

set a different strobe-mode LED current, change R1,

ulate strobe-mode LED currents up to 300mA; however,

the LED installed on the MAX1583 EV kit has a maxi-

mum pulse-current rating of 100mA. If larger currents

are desired, a new LED with a higher pulsed current

rating must be installed on the EV kit.

Evaluating Off-Board LEDs

The MAX1583 EV kit allows for easy evaluation of off-

board LEDs. To evaluate off-board LEDs, first remove

the installed LED module, D2. Next, connect the pad

labeled OUT on the EV kit to the anode of the series

LED string under evaluation and connect the cathode

of the external series LED string to the EV kit pad

labeled LED.

Component List (continued)

DESIGNATION

QTY

DESCRIPTION

U1

1

MAX1583XETB (10-pin TDFN)

U2

1

MAX6422XS23 (SOT23)

None

2

Shunts

None

1

MAX1583 EV kit PC board