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AF1937 - White LED Step UP Converter

Download the AF1937 datasheet PDF. This datasheet also covers the AF1937-Alfa variant, as both devices belong to the same white led step up converter family and are provided as variant models within a single manufacturer datasheet.

Description

The AF1937 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current.

The device can drive two, three or four LEDs in series from a Li-Ion cell.

Features

  • Inherently Matched LED Current High Efficiency: 84% Typical Drives Up to Four LEDs from a 3.2V Supply Drives Up to Six LEDs from a 5V Supply 36V Rugged Bipolar Switch Fast 1.2MHz Switching Frequency Uses Tiny 1mm Tall Inductors Requires Only 0.22µF Output Capacitor.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (AF1937-Alfa-MOS.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number AF1937
Manufacturer Alfa-MOS
File Size 551.01 KB
Description White LED Step UP Converter
Datasheet download datasheet AF1937 Datasheet

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Full PDF Text Transcription

Click to expand full text
Alfa-MOS Technology AF1937 20V White LED Step UP Converter General Description The AF1937 is a step-up DC/DC converter specifically designed to drive white LEDs with a constant current. The device can drive two, three or four LEDs in series from a Li-Ion cell. Series connection of the LEDs provides identical LED currents resulting in uniform brightness and eliminating the need for ballast resistors. The output capacitor can be as small as 0.22µF, saving space versus alternative solutions. A low 95mV feedback voltage minimizes power loss for better efficiency. Features Inherently Matched LED Current High Efficiency: 84% Typical Drives Up to Four LEDs from a 3.2V Supply Drives Up to Six LEDs from a 5V Supply 36V Rugged Bipolar Switch Fast 1.
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