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LM3423 - N-Channel Controllers

Download the LM3423 datasheet PDF. This datasheet also covers the LM3421 variant, as both devices belong to the same n-channel controllers family and are provided as variant models within a single manufacturer datasheet.

General Description

The LM3421 and LM3423 family of devices are versatile high voltage N-channel MOSFET controllers for LED drivers.

They can be easily configured in buck, boost, buck-boost and SEPIC topologies.

Key Features

  • 1 VIN Range From 4.5 V to 75 V.
  • High-Side Adjustable Current Sense.
  • 2-Ω, 1-A Peak MOSFET Gate Driver.
  • Input Undervoltage and 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 and LM3423-Q0 Only).
  • Fault Status Flag and Timer(LM3423 and LM3423-Q0 Only) 2.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (LM3421-etcTI.pdf) that lists specifications for multiple related part numbers.

📁 Similar Datasheet

Part Number Description Manufacturer
LM342 3-Terminal Positive Regulators National Semiconductor
LM3420 Lithium-Ion Battery Charge Controller National Semiconductor
LM3420-12.6 Lithium-Ion Battery Charge Controller National Semiconductor
LM3420-16.8 Lithium-Ion Battery Charge Controller National Semiconductor
LM3420-4.2 Lithium-Ion Battery Charge Controller National Semiconductor

Other Datasheets by Texas Instruments

Part Number Description
LM3423-Q1 N-Channel Controllers
LM3420 8.4-V Li-Ion Battery Charge Controller
LM3421 N-Channel Controllers
LM3421-Q1 N-Channel Controllers
LM3424 Constant Current N-channel Controller

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
Product Folder Order Now Technical Documents Tools & Software Support & Community LM3421, LM3423 SNVS574G – JULY 2008 – REVISED JULY 2019 LM342x N -Channel Controllers for Constant-Current LED Drivers 1 Features •1 VIN Range From 4.