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SP1937 - DC-DC Step-Up Converter

Description

The SP1937 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.

Features

  • Fast 1.2MHz Switching Frequency.
  • High Efficiency up to 85%.
  • Drives up to seven LEDs From 2.5V Supply.
  • Low Quiescent Current.
  • Disconnects LEDs in Shutdown Mode.
  • Internal Over Temperature and Current Limiting Shutdown Function.
  • 36V Rugged Bipolar Switch.
  • Small Package SOT-23-5L & SOT-353 PIN.

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Datasheet Details

Part number SP1937
Manufacturer SYNC POWER
File Size 671.51 KB
Description DC-DC Step-Up Converter
Datasheet download datasheet SP1937 Datasheet

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Full PDF Text Transcription

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SP1937 DC-DC Step-Up Converter for White LED DESCRIPTION The SP1937 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. The SP1937 DC/DC converter operates at 1.2MHz and low output capacitor as small as 0.22uF; apply to Lithium-Ion powered systems. A low 95mV (Typ) reference voltage minimizes power loss in the current setting resistor for better efficiency. APPLICATIONS • Battery Power Equipment • Notebook Computers • PDA • Cellular Phone • Digital Cameras • MP3 Players • GPS Receivers FEATURES ◆ Fast 1.
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