MAX1561 Evaluation MAX1561 evaluation fully assembled tested circ

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MAX1561 Evaluation MAX1561 evaluation fully assembled tested circ

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19-2814; 4/03
MAX1561 Evaluation
MAX1561 evaluation fully assembled tested circuit board that evaluates MAX1561 white step-up DC-to-DC converter. circuit operates from 2.6V 5.5V delivers adjustable 20mA drive series white LEDs series.
Features
Constant-Current Regulation Uniform Illumination High Efficiency Flexible Analog Dimming Control 900mW Output Power with Internal MOSFET Switch Output Overvoltage Protection 15mVP-P Input Ripple Small, Low-Profile Components 2.6V 5.5V Input Range 0.3µA Shutdown Current Tiny Thin Fully Assembled Tested
Evaluates: MAX1561
Component List
DESIGNATION DESCRIPTION 2.2µF, 6.3V capacitor (0603) Taiyo-Yuden JMK107BJ225MA Panasonic ECJ1VB0J225M 0.1µF, capacitor (0805) Taiyo-Yuden UMK212BJ104MG Panasonic ECJ2FB1H104M 0.1µF, capacitor (0603) Taiyo-Yuden LMK107BJ104MA Panasonic ECJ1VB1A104M resistor (0603) 100k resistor (0603) 22µH, 250mA, 0.710, 2.5mm 2.2mm 2.0mm inductor (1210) Murata LQH32CN220K 22µH, 210mA, 0.770, 2.5mm 1.8mm 1.8mm inductor (1206) Taiyo Yuden LBC2518-220M (unconnected) 22µH, 350mA, 1.46, 3.6mm 3.6mm 1.2mm inductor TOKO 976AS-220M (D312F) (unconnected) Schottky diode, 200mA Central CMDSH2-3 White LEDs Nichia NSCW215T 2-pin header installed, board jumper-open MAX1561ETA (8-pin thin QFN) Shunt MAX1561 board
Ordering Information
PART MAX1561EVKIT TEMP RANGE -30°C +85°C PACKAGE Thin (3mm 3mm)
Quick Start
Follow steps below verify board operation. turn power supply until connections completed: Verify that shunt across pins jumper JU1. Preset power supply between 2.6V 5.5V. Turn power supply. Connect positive power-supply terminal labeled Connect power-supply ground terminal labeled GND. Turn power supply verify that LEDs lit.
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
D2-D7
Maxim Integrated Products
pricing, delivery, ordering information, please contact Maxim/Dallas Direct! 1-888-629-4642, visit Maxim's website www.maxim-ic.com.
MAX1561 Evaluation Evaluates: MAX1561
Detailed Description
Controlling Intensity
intensity controlled using CTRL input. CTRL used either analog input digital input. When using CTRL analog input, connect 0.24V 1.62V voltage source CTRL, where 0.24V corresponds dimmest setting 1.62V full brightness. Connecting CTRL ground places MAX1561 shutdown mode. digital signal (200Hz 200kHz) also connected directly CTRL. this case, duty cycle controls brightness LEDs, where corresponds dimmest setting 100% full brightness. pullup resistor (R2) jumper (JU1) provided that used without connection CTRL. With shorted other connection CTRL, LEDs full brightness. CTRL being driven, shunt across removed. Remove jumper across when measuring quiescent current with circuit shutdown mode.
Changing Number LEDs
MAX1561 used drive LEDs. MAX1561 comes configured driving LEDs. evaluate MAX1561 driving fewer than LEDs, short pads unused LEDs. convenience, used short LEDs operation.
Evaluating Other Inductors
Inductors provided board simplify evaluation other inductors. evaluate these inductors circuit, carefully remove from circuit replace with either
5.5V 2.2µF 100k CTRL
22µH
0.1µF
MAX1561
CTRL
PGND
0.1µF
COMP
Figure MAX1561 Schematic
MAX1561 Evaluation Evaluates: MAX1561
1.0"
1.0"
Figure MAX1561 Component Placement Guide- Component Side
Figure MAX1561 Layout-Component Side
1.0"
Figure MAX1561 Layout-Solder Side
Maxim cannot assume responsibility circuitry other than circuitry entirely embodied Maxim product. circuit patent licenses implied. Maxim reserves right change circuitry specifications without notice time.
Maxim Integrated Products, Gabriel Drive, Sunnyvale, 94086 408-737-7600 2003 Maxim Integrated Products Printed registered trademark Maxim Integrated Products.

MAX1561 Evaluation MAX1561 evaluation fully assembled tested circ

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