LM3423MH Part Information

Details for LM3423MH by Texas Instruments

Electronic & Electrical Components > Semiconductors - ICs > Driver & Interface ICs

Part 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. This flexibility, along with an input voltage rating of 75 V, makes the LM3421 and LM3423 devices ideal for illuminating LEDs in a large family of applications. Adjustable high-side current sense voltage allows for tight regulation of the LED current with the highest efficiency possible. The LM3421 and LM3423 devices use predictive off-time (PRO) control, which is a combination of peak current-mode control and a predictive off-timer. This method of control eases the design of loop compensation while providing inherent input voltage feed-forward compensation. The LM3421 and LM3423 devices include a highvoltage start-up regulator that operates over a wide input range of 4.5 V to 75 V. The internal PWM controller is designed for adjustable switching frequencies of up to 2 MHz, thus enabling compact solutions.

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Part Features

  • 2-u2126, 1-A Peak MOSFET Gate Driver
  • Cycle-by-Cycle Current Limit
  • Fault Status Flag and Timer (LM3423/23Q1/23Q0
  • High-Side Adjustable Current Sense
  • Input Undervoltage and Output Overvoltage Protection
  • LED Output Status Flag (LM3423/23Q1/23Q0 Only)
  • LM3421Q0/LM3423Q0 are Automotive Grade Products That are AEC-Q100 Grade 0 Qualified
  • LM3421Q1/LM3423Q1 are Automotive Grade Products That are AEC-Q100 Grade 1 Qualified
  • PWM and Analog Dimming
  • Programmable Switching Frequency
  • VIN Range From 4.5 V to 75 V
  • Zero Current Shutdown and Thermal Shutdown

Part Specifications

Device Topology Boost Buck Buck-Boost Flyback SEPIC
Input Voltage Min 4.5V
Input Voltage Max 75V
Output Voltage Max 72V
Output Current Max 5A
Switching Frequency 2MHz
No. of Outputs 1Outputs
IC Mounting SMD
Driver Case Style TSSOP
No. of Pins 20Pins
Operating Temperature Min -40°C
Operating Temperature Max 125°C
Product Range -
Automotive Qualification Standard AEC-Q100
RoHS Phthalates Compliant Yes
MSL MSL 1 - Unlimited
SVHC No SVHC (27-Jun-2018)
Base Number 3423
Device Type LED
Dimming Control Type Analogue PWM
Input Voltage 4.5V to 75V
LED Driver Application Automotive General Illumination
Operating Temperature Range -40°C to +150°C
Output Voltage 75V
Supply Voltage Max 75V
Supply Voltage Min 4.5V
Termination Type Surface Mount Device
RoHS Compliant

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