Datasheet LM3444MM/NOPB - National Semiconductor — 数据表

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Manufacturer: National Semiconductor

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Docket:
LM3444 AC-DC Offline LED Driver
January 4, 2011
LM3444 AC-DC Offline LED Driver
General Description
The LM3444 is an adaptive constant off-time AC/DC buck (step-down) constant current controller that provides a constant current for illuminating high power LEDs.

The high frequency capable architecture allows the use of small external passive components. A passive PFC circuit ensures good power factor by drawing current directly from the line for most of the cycle, and provides a constant positive voltage to the buck regulator. Additional features include thermal shutdown, current limit and VCC under-voltage lockout. The LM3444 is available in a low profile MSOP-10 package.

Specifications:

• Number of Outputs: 1
• Operating Temperature Range: -40°C to +125°C
• Output Current: 100 mA
• Package / Case: MSOP
• Topology: Buck (Step Down)