19-2814; Rev 1; 4/03
MAX1561 Evaluation Kit
General Description
The MAX1561 evaluation kit is a fully assembled and
tested circuit board that evaluates the MAX1561 white
LED step-up DC-to-DC converter. The circuit operates
from 2.6V to 5.5V and delivers an adjustable 0 to 20mA
to drive a series of up to six white LEDs in series.
Features
o
Constant-Current Regulation for Uniform
Illumination
o
High 84% Efficiency
o
Flexible Analog or PWM Dimming Control
o
900mW Output Power with Internal 30V MOSFET
Switch
o
Output Overvoltage Protection
o
Low 15mV
P-P
Input Ripple
o
Small, Low-Profile Components
o
2.6V to 5.5V Input Range
o
0.3碌A Shutdown Current
o
Tiny 3mm x 3mm Thin QFN
o
Fully Assembled and Tested
Evaluates: MAX1561
Component List
DESIGNATION QTY
C1
1
DESCRIPTION
2.2碌F, 6.3V X5R capacitor (0603)
Taiyo-Yuden JMK107BJ225MA or
Panasonic ECJ1VB0J225M
0.1碌F, 50V X7R capacitor (0805)
Taiyo-Yuden UMK212BJ104MG or
Panasonic ECJ2FB1H104M
0.1碌F, 10V X7R capacitor (0603)
Taiyo-Yuden LMK107BJ104MA or
Panasonic ECJ1VB1A104M
7.5鈩?鹵1% resistor (0603)
100k鈩?鹵5% resistor (0603)
22碌H, 250mA, 0.710鈩? 2.5mm x
2.2mm x 2.0mm inductor (1210)
Murata LQH32CN220K
22碌H, 210mA, 0.770鈩? 2.5mm x
1.8mm x 1.8mm inductor (1206)
Taiyo Yuden LBC2518-220M
(unconnected)
22碌H, 350mA, 1.46鈩? 3.6mm x 3.6mm
x 1.2mm inductor
TOKO 976AS-220M (D312F)
(unconnected)
Schottky diode, 200mA
Central CMDSH2-3
White LEDs
Nichia NSCW215T
2-pin header
Not installed, PC board jumper鈥攐pen
MAX1561ETA (8-pin thin QFN)
Shunt
MAX1561 EV kit PC board
Ordering Information
PART
MAX1561EVKIT
TEMP RANGE
-30擄C to +85擄C
IC PACKAGE
8 Thin QFN (3mm x 3mm)
C2
1
Quick Start
Follow the steps below to verify board operation.
Do
not turn on the power supply until all connections
are completed:
1) Verify that a shunt is across the pins of jumper JU1.
2) Preset the power supply to between 2.6V and 5.5V.
3) Turn off the power supply.
4) Connect positive power-supply terminal to the pad
on the EV kit labeled V+.
5) Connect power-supply ground terminal to the pad
on the EV kit labeled GND.
6) Turn on the power supply and verify that the LEDs are lit.
C3
R1
R2
L1
1
1
1
1
L2
1
Component Suppliers
SUPPLIER
Central
Semiconductor
Kamaya
Kingbright
Murata
Nichia
Panasonic
Sumida
Taiyo Yuden
TOKO
PHONE
631-435-1110
260-489-1533
888-546-4533
814-237-1431
248-352-6575
714-373-7939
847-956-0666
408-573-4150
847-297-0070
WEBSITE
www.centralsemi.com
www.kamaya.com
www.kingbright.com
www.murata.com
www.nichia.com
www.panasonic.com
www.sumida.com
www.t-yuden.com
www.toko.com
L3
1
D1
D2鈥揇7
JU1
JU2
U1
鈥?/div>
鈥?/div>
1
6
1
1
1
1
1
________________________________________________________________
Maxim Integrated Products
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at
1-888-629-4642, or visit Maxim鈥檚 website at www.maxim-ic.com.
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