Datasheet4U Logo Datasheet4U.com

MAX1848 - White LED Step-Up Converter

General Description

The MAX1848 drives 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 that the LED currents are identical for uniform brightness.

Key Features

  • o Constant Current Regulation for Uniform Illumination o High 87% Efficiency o Analog or Logic Control of LED Intensity o 0.8W Output Power with Internal High-Voltage MOSFET Switch o Small, Low-Profile External Components o 2.6V to 5.5V Input Range o 13V Maximum Output with Overvoltage Protection o Optimized for Low Input Ripple o Programmable Soft-Start o 0.3µA Shutdown Current o Small 8-pin Thin QFN (3mm ✕ 3mm) and 8-Pin SOT23 Packages MAX1848.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
MAX1841 Low-Voltage SIM/Smart Card Level Translators Maxim Integrated
MAX1844 High-Speed Step-Down Controller Maxim Integrated Products
MAX18000 500mV to 5.5V Input nanoPower Boost Converter Analog Devices
MAX1806 Low-Voltage Linear Regulator Maxim Integrated
MAX1820 WCDMA Cellular Phone 600mA Buck Regulators Maxim Integrated Products

Other Datasheets by Maxim Integrated (now Analog Devices)

Part Number Description
MAX184 High-Speed 12-Bit A/D Converters With External Refernce input
MAX1840 Low-Voltage SIM/Smart Card Level Translators
MAX1842 Step-Down Regulators
MAX1843 2.7A / 1MHz / Low-Voltage / Step-Down Regulator
MAX1845 Dual / High-Efficiency / Step-Down Controller with Accurate Current Limit

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
19-2028; Rev 1; 9/02 White LED Step-Up Converter in SOT23 General Description The MAX1848 drives 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 that the LED currents are identical for uniform brightness. This configuration eliminates the need for ballast resistors and expensive factory calibration. Other benefits include greater simplicity, lower cost, higher efficiency, and greater reliability. This step-up PWM converter includes an internal, highvoltage, low RDSON N-channel MOSFET switch for high efficiency and maximum battery life. A single analog voltage Dual Mode™ input provides a simple means of brightness adjustment and on/off control. Fast 1.