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ST1937 - DC-DC Step-Up Converter

General Description

ST1937 is a step-up DC/DC converter for white LED driver with constant current.

The device can driver one to four LEDs in series from a single cell Lithium ion battery.

Internal functions include current limiting; thermal shutdown and soft-start to prevent damage operate status.

Key Features

  • z Fast 1.2MHz Switching Frequency z High Efficiency up to 85% z Drives up to Four LEDs From 3.2V Supply z Low Quiescent Current z Internal Over Temperature and Current Limiting Shutdown Function z Internal Soft-Star.

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Datasheet Details

Part number ST1937
Manufacturer STANSON
File Size 193.47 KB
Description DC-DC Step-Up Converter
Datasheet download datasheet ST1937 Datasheet

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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.

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ST1937 DC-DC Step-Up Converter for White LED Driver DESCRIPTION ST1937 is a step-up DC/DC converter for white LED driver with constant current. The device can driver one to four LEDs in series from a single cell Lithium ion battery. Internal functions include current limiting; thermal shutdown and soft-start to prevent damage operate status. ST1937 DC/DC converter operates at 1.2MHz and low output capacitor as small as 0.22uF; apply to Lithium-Ion powered systems. A low 100mV reference voltage minimizes power loss in the current setting resistor for better efficiency. PIN CONFIGURATION SOT23-5L SOT-353 ( SC-70-5L ) APPLICATIONS z Battery Powered Devices z Digital Camera z PDA z GPS z Hand Held Communication Equipment z MP3/4 PART MARKING ORDERING INFORMATION FEATURES z Fast 1.