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MAX1561 - High-Efficiency / 26V Step-Up Converters for Two to Six White LEDs

Datasheet Summary

Description

The MAX1561/MAX1599 step-up converters drive up to six white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices.

The step-up converter topology allows series connection of the white LEDs so the LED currents are identical for uniform brightness.

Features

  • o Accurate Current Regulation for Uniform Illumination o High Efficiency Up to 87% o Flexible Analog or PWM Dimming Control o Up to 900mW Output Power with Internal 30V MOSFET Switch o Fast 1MHz (MAX1561) or 500kHz (MAX1599) PWM Operation o Small, Low-Profile External Components o 2.6V to 5.5V Input Range o 26V (max) Output with Overvoltage Protection o Optimized for Low 15mVP-P Input Ripple o Soft-Start with Zero Inrush Current o 0.3µA Shutdown Current o Tiny 8-Pin 3mm x 3mm Thin DFN Package M.

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Datasheet preview – MAX1561

Datasheet Details

Part number MAX1561
Manufacturer Maxim
File Size 245.35 KB
Description High-Efficiency / 26V Step-Up Converters for Two to Six White LEDs
Datasheet download datasheet MAX1561 Datasheet
Additional preview pages of the MAX1561 datasheet.

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Full PDF Text Transcription

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19-2731; Rev 1; 10/03 KIT ATION EVALU E L B A AVAIL High-Efficiency, 26V Step-Up Converters for Two to Six White LEDs General Description The MAX1561/MAX1599 step-up converters drive up to six white LEDs with a constant current to provide backlight in cell phones, PDAs, and other hand-held devices. The step-up converter topology allows series connection of the white LEDs so the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration. The MAX1561/MAX1599 include an internal, high-voltage, low-RDS(ON) N-channel MOSFET switch for high efficiency and maximum battery life. A single Dual Mode™ input provides a simple means of brightness adjustment and on/off control.
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