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LM3401

Texas Instruments
Part Number LM3401
Manufacturer Texas Instruments
Description Hysteretic PFET Controller
Published Oct 1, 2019
Detailed Description LM3401 www.ti.com SNVS516C – AUGUST 2007 – REVISED MAY 2013 LM3401 Hysteretic PFET Controller for High Power LED Driv...
Datasheet PDF File LM3401 PDF File

LM3401
LM3401

Overview
LM3401 www.
ti.
com SNVS516C – AUGUST 2007 – REVISED MAY 2013 LM3401 Hysteretic PFET Controller for High Power LED Drive Check for Samples: LM3401 FEATURES 1 •2 Hysteretic Control for Speed and Simplicity • Input Operating Range of 4.
5V-35V • 1.
5MHz Maximum Switching Frequency • Low 200mV Reference Voltage • Programmable Current Limit • High speed CMOS Compatible Enable/Dimming • Adjustable Hysteresis • Input UVLO • No output Capacitor Required • 8-pin VSSOP Package APPLICATIONS • LED Driver • Battery Charger DESCRIPTION The LM3401 is a switching controller designed to provide constant current to high power LEDs.
The LM3401 drives an external P-MOSFET switch for step-down (Buck) regulators.
The LM3401 delivers constant current within ±6% accuracy to a wide variety and number of series connected LEDs.
Output current is adjusted with an external current sensing resistor to drive high power LEDs in excess of 1A.
For improved accuracy and efficiency, the LM3401 features dual-side hysteresis, very low reference voltage, and short propagation delay.
A cycle by cycle current limit provides protection against over current and short circuit failures.
Additional features include adjustable hysteresis and a CMOS compatible input pin for PWM dimming.
VIN = 4.
5V to 35V TYPICAL APPLICATION CIRCUIT C1 R2 VIN DIM HYS GND R3 ILIM LM3401 HG CS SNS Q1 L1 D1 LED current R1 1 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
All trademarks are the property of their respective owners.
2 PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas Instruments standard warranty.
Production processing does not necessarily include testing of all parameters.
Copyright © 2007–2013, Texas Instruments Incorporated LM3401 SNVS516C – AUGUST 2007...


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