LM3421MHX
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LM3421MHX

  • Category:LED driver
  • Product Name:Constant current LEDs are driven from the semiconductor PowerWise ® series
  • Manufacturers:NSC
  • Production Batch Number:10+
  • Encapsulation:SPQ 2500
  • Stock Status:There is stock
  • Stock Quantity:65000
  • Minimum order quantity: 1
  • Details:Click here to find pdf information on the LM3421MHX
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  • Product introduction

peculiarity

  • LM3421Q1/LM3423Q1 is AEC-Q100 Class 1 qualified (-40°C to +125°C operating junction temperature) for automobiles, and LM3421Q0/LM3423Q0 is AEC-Q100 Class 0 qualified (-40°C to +150°C grade C operating junction temperature)
  • atRange V from 4.5V to 75V
  • High-side current sensing is adjustable
  • 2Ω, 1A peak MOSFET gate driver
  • Input undervoltage, output overvoltage protection
  • PWM and analog dimming
  • Cycle-by-cycle current limit
  • Programmable switching frequency
  • "Zero current" shutdown and thermal shutdown
  • LED output status flag (LM3423/23Q1/23Q0 only)
  • Fault Status Flags and Timers (LM3423/23Q1/23Q0 only)

illustrate

The LM3421/23 are multifunction high voltage N-channel MOSFETs for LED driver controllers. They can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with a 75V input voltage level, makes the LM3421/23 ideal for lighting LEDs in a large number of applications.

The adjustable high-side current sense voltage allows for tight monitoring of LED current and the highest possible efficiency. The LM3421/23 uses predictive off-time (professional) control, which is a combination of peak current mode control and predictive off-timer. This control method simplifies loop compensation design while providing inherent input voltage feedforward compensation.

The LM3421/23 device includes a high voltage start-up regulator that operates over a wide input range of 4.5V to 75V. The internal PWM controller is designed for adjustable switching frequencies up to 2.0 MHz, making for a compact solution. Other features include "zero current" shutdown, analog dimming PWM dimming, overvoltage protection, undervoltage lockout, cycle-by-cycle current limit, and thermal shutdown.

The LM3423 also includes an LED output status flag, fault flag, programmable fault timer and a logic input to select the polarity of the dimming output driver.

The LM3421Q1/23Q1 is AEC - Q100 Class 1 qualified and the LM3421Q0/23Q0 is AEC - Q100 Class 0 qualified.


apply

  • LED drivers - buck, boost, buck - boost, SEPIC and
  • SSL for indoor and outdoor areas
  • Car
  • General lighting
  • Constant current regulator

andLM3421MHXRelated ICs are:


Model Manufacturers lot number encapsulation illustrate
LM3421MHX/NOPB   10+11+   Hong Kong spot, imported original
LM3421MHX NSC 10+ SPQ 2500 Constant current LEDs are driven from the semiconductor PowerWise ® series

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