Datasheet Texas Instruments LM3431AMH/NOPB

3-Channel Constant Current LED Driver with Integrated Boost Controller 28-HTSSOP -40 to 125

Datasheets

PDF, 1.9 Mb, Revision: G, File published: May 2, 2013

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Lifecycle Status	Active (Recommended for new designs)
Manufacture's Sample Availability	Yes

Dimming Method	Analog,PWM
Input Voltage	DC/DC Type
Iout(Max)	0.6 A
Iq(Typ)	4 mA
Operating Temperature Range	-40 to 125 C
Package Group	HTSSOP
Package Size: mm2:W x L	28HTSSOP: 62 mm2: 6.4 x 9.7(HTSSOP) PKG
Power Factor Correction	N/A Min
Rating	Catalog
Regulated Outputs	3
Special Features	Adjustable Switch Frequency,Enable/Shutdown,Soft Start,Thermal Shutdown
Switching Frequency(Max)	1000 kHz
Switching Frequency(Min)	200 kHz
Topology	Boost,Boost with Current Sink,Multi-Channel
Type	Controller,Inductive
Vin(Max)	36 V
Vin(Min)	4.5 V
Vout(Max)	40 V
Vout(Min)	5.5 V
Vref	2.5 V

RoHS

Compliant

Evaluation Modules & Boards: LM3431EVAL
Evaluation Board for the 3-Channel Constant Current LED Driver with Integrated Boost Controller
Lifecycle Status: Active (Recommended for new designs)
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AN-1656 Design Challenges of Switching LED Drivers (Rev. A)
PDF, 171 Kb, Revision: A, File published: May 3, 2013
Using a switching regulator as an LED driver requires the designer to convert a voltage regulator into acurrent regulator. Beyond the challenge of changing the feedback system to control current, the LEDsthemselves present a load characteristic that is much different than the digital devices and other loads thatrequire constant voltage. The LED WEBENCHВ® online design environment predicts and

Series: LM3431 (4)

Semiconductors > Power Management > LED Driver > Illumination & General Lighting LED Driver