LM3409MYX/NOPB PFET Buck Controller transistor integrated circuit for High Power LED Drives

PFET Buck Controller for High Power LED Drives

Features

■ 2Ω, 1A Peak MosFET Gate Drive

■ VIN Range: 6V to 42V (LM3409)

■ VIN Range: 6V to 75V (LM3409HV)

■ Differential, High-side Current Sense

■ Cycle-by-Cycle Current Limit

■ No Control Loop Compensation 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 eMSOP-10 Package

Applications

■ LED Driver

■ Constant Current Source

■ Automotive Lighting

■ General Illumination

■ Industrial Lighting

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 set.

Typical Application

CHONGMING GROUP (HK) INT'L CO., LTD. located in Hong Kong and Shenzhen. We are an independent Distributor of Electronic Components,established in 2008. AS a growing fast company, CM GROUP is renowned for its world-class efficiency, excellent services, and extraordinary ability to supply electronic components that are hard to find and even obsolete. We have taken pride in our innovation, reliability and service, especially in the semiconductor marketplace.
Our distribution brands include XILINX，ALTERA，ATMEL, INFINEON, ST,SAMSUNG，TEXAS INSTRUMENTS，ON，TOSHIBA，，MICROCHIP，CYPRESS，FREESCALE，etc. We distributes over 200,000 products ranging from semiconductors to resistors, capacitors, diodes, inductors, connectors, transistors, sensors and so on.
Our mission is to meet and exceed all the expecations of what we supply to customers.