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LM3409HV

National Semiconductor
Part Number LM3409HV
Manufacturer National Semiconductor
Description PFET Buck Controller
Published Sep 11, 2009
Detailed Description LM3409 / LM3409HV PFET Buck Controller for High Power LED Drives www.DataSheet4U.com LM3409 LM3409HV June 12, 2009 P...
Datasheet PDF File LM3409HV PDF File

LM3409HV
LM3409HV

Overview
LM3409 / LM3409HV PFET Buck Controller for High Power LED Drives www.
DataSheet4U.
com LM3409 LM3409HV June 12, 2009 PFET Buck Controller for High Power LED Drives General Description The LM3409/09HV are P-channel MosFET (PFET) controllers for step-down (buck) current regulators.
They offer wide input voltage range, high-side differential current sense with low adjustable threshold voltage, fast output enable/disable function and a thermally enhanced eMSOP-10 package.
These features combine to make the LM3409/09HV ideal for use as constant current sources for driving LEDs where forward currents up to 5A are easily achievable.
The LM3409/09HV uses Constant Off-Time (COFT) control to regulate an accurate constant current without the need for external control loop compensation.
Analog and PWM dimming are easy to implement and result in a highly linear dimming range with excellent achievable contrast ratios.
Programmable UVLO, low-power shutdown, and thermal shutdown complete the feature...


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