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| LM3401MM Datasheet, PDF (1/27 Pages) Texas Instruments – LM3401 Hysteretic PFET Controller for High Power LED Drive | |||
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LM3401
www.ti.com
SNVS516C â AUGUST 2007 â REVISED MAY 2013
LM3401 Hysteretic PFET Controller for High Power LED Drive
Check for Samples: LM3401
FEATURES
1
â¢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
HG
LM3401
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 © 2007â2013, Texas Instruments Incorporated
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