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LM3421MH

Led Driver, 2 Outputs, Boost, Buck, Flyback, SEPIC, 4.5V-75V in, 2MHz switch, 75V out, TSSOP-16

TEXAS INSTRUMENTS LM3421MH

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Manufacturer Part No:
LM3421MH
Order Code:
1643506

Product Information

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:
Boost, Buck, Buck-Boost, Flyback, SEPIC

:
4.5V

:
75V

:
72V

:
5A

:
2MHz

:
1Outputs

:
SMD

:
TSSOP

:
16Pins

:
-40°C

:
125°C

:
-

:
AEC-Q100

:
MSL 1 - Unlimited
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Technical Docs (0)

Product Overview

The LM3421MH is a versatile high voltage N-channel Controller for constant current LED drivers. It can be easily configured in buck, boost, buck-boost and SEPIC topologies. This flexibility, along with an input voltage rating of 75V, makes the LM3421 device 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 device uses 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 devices include a high-voltage start-up regulator that operates over a wide input range of 4.5 to 75V. The internal PWM controller is designed for adjustable switching frequencies of up to 2MHz, thus enabling compact solutions.
  • High-side adjustable current sense
  • Input under-voltage and output over-voltage protection
  • PWM and analogue dimming
  • Cycle-by-cycle current limit
  • Programmable switching frequency
  • Zero current shutdown and thermal shutdown
  • 2R, 1A Peak MOSFET gate drive
  • Green product and no Sb/Br

Applications

LED Lighting, Automotive, Industrial

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