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ST1938 - DC-DC Step-Up Converter

General Description

The ST1938 is a step-up DC/DC converter for white LED driver with over voltage protection.

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

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

Key Features

  • z Current Source with Over Voltage Protection z Fast 0.8MHz Switching Frequency z High Efficiency up to 87% z Drives up to Four LEDs From 3.2V Supply z Drives up to Six LEDs From a 5V Supply z Low Quiescent Current z Disconnects LEDs i.

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Datasheet Details

Part number ST1938
Manufacturer STANSON
File Size 121.30 KB
Description DC-DC Step-Up Converter
Datasheet download datasheet ST1938 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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ST1938 DC-DC Step-Up Converter for White LED Driver DESCRIPTION The ST1938 is a step-up DC/DC converter for white LED driver with over voltage protection. The device can driver one to four LEDs in series from a single cell Lithium Ion battery. Internal functions include current limiting; thermal shutdown; OVP and soft-start to prevent damage operate status. The ST1938 operates at 0.8MHz and from low input voltages as low as 1.5V; apply to Lithium-Ion powered systems. A low 95mV reference voltage minimizes power loss in the current setting resistor for better efficiency.