LM3409QHV Datasheet | National Semiconductor

Description The LM3409/09HV are P-channel Mos FET (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 e MSOP-10 package. These features bine 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 LM3409/09Q/09HV/09QHV uses Constant Off-Time (COFT) control to regulate an accurate constant current without the need for external control loop pensation. 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 plete the feature set. April 12, 2010 Features - LM3409Q/LM3409QHV is an Automotive Grade product that is AEC-Q100 grade 1 qualified 2Ω, 1A Peak Mos FET Gate Drive VIN Range: 6V to 42V (LM3409/LM3409Q) VIN Range: 6V to 75V (LM3409HV/LM3409QHV) Differential, High-side Current Sense Cycle-by-Cycle Current Limit No Control Loop pensation Required 10,000:1 PWM Dimming Range 250:1 Analog Dimming Range Supports All-Ceramic Output Capacitors and Capacitorless Outputs - Low Power Shutdown - Thermal Shutdown Protection - Thermally Enhanced e MSOP-10 Package - - - - - - - - - Applications - - - - - LED Driver Constant Current Source Automotive Lighting General Illumination Industrial Lighting Typical Application © 2010 National Semiconductor Corporation .national. .Data Sheet.in LM3409/LM3409HV/LM3409Q/LM3409QHV Connection Diagram LM3409/09Q/09HV/09QHV 10-Lead Exposed Pad e MSOP Package Ordering Information Order Number LM3409MY LM3409MYX LM3409HVMY LM3409HVMYX LM3409QMY LM3409QMYX LM3409QHVMY LM3409QHVMYX NSC Package Drawing MUC10A MUC10A MUC10A MUC10A MUC10A MUC10A MUC10A MUC10A Top Marking SXFB SXFB SYHB SYHB SZDB SZDB SZEB SZEB Supplied As...