LM3409 / LM3409HV PFET Buck Controller for High Power LED Drives
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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 regulat...