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LM3421 - N-Channel Controllers

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.

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Other Datasheets by Texas Instruments

Part Number Description
LM3421-Q1 N-Channel Controllers
LM3420 8.4-V Li-Ion Battery Charge Controller
LM3423 N-Channel Controllers
LM3423-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.

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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.