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Product details

Parameters

Input voltage (type) DC/DC Topology Buck Vin (Min) (V) 6 Vin (Max) (V) 42 Iout (Max) (A) 5 Iq (Typ) (mA) 2 Features Adjustable Switch Frequency, Enable/Shutdown, Precision Dimming Control, Thermal Shutdown Operating temperature range (C) -40 to 125 Dimming method Analog, PWM open-in-new Find other Illumination LED drivers

Package | Pins | Size

HVSSOP (DGQ) 10 15 mm² 3 x 4.9 open-in-new Find other Illumination LED drivers

Features

  • LM3409-Q1 and LM3409HV-Q1 are Automotive Grade Products: AEC-Q100 Grade 1 Qualified
  • 2-Ω, 1-A Peak MOSFET Gate Drive
  • VIN Range: 6 V to 42 V (LM3409, LM3409-Q1)
  • VIN Range: 6 V to 75 V (LM3409HV, LM3409HV-Q1)
  • Differential, High-Side Current Sense
  • Cycle-by-Cycle Current Limit
  • No Control Loop Compensation Required
  • 10,000:1 PWM Dimming Range
  • 250:1 Analog Dimming Range
  • Supports All-Ceramic Output Capacitors and Capacitor-less Outputs
  • Low-Power Shutdown and Thermal Shutdown
  • Thermally Enhanced 10-Pin, HVSSOP Package
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Description

The LM3409, LM3409-Q1, LM3409HV, and LM3409HV-Q1 are P-channel MOSFET (PFET) controllersfor step-down (buck) current regulators. They offer wide input voltage range, high-sidedifferential current sense with low adjustable threshold voltage and fast output enable/disablefunction and a thermally enhanced 10-pin, HVSSOP package. These features combine to make the LM3409 family of devices ideal for use as constant current sources for driving LEDs where forward currentsup to 5 A are easily achievable.

The LM3409 devices use constant off-time (COFT) control to regulate an accurate constantcurrent without the need for external control loop compensation. Analog and PWM dimming are easy toimplement and result in a highly linear dimming range with excellent achievable contrast ratios. Programmable UVLO, low-power shutdown, and thermal shutdown complete the feature set.

For all available packages, see the orderable addendum at the end of the data sheet.
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TPS92515 ACTIVE 42-V 2-A LED driver with integrated NFET, high-side current sense, and shunt PWM dimming capable This product is an integrated NFET controlled off-time buck LED driver with power-up output current calibration. It supports input voltage up to 42 V.

Technical documentation

= Top documentation for this product selected by TI
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Type Title Date
* Datasheet LM3409, -Q1, LM3409HV, -Q1 P-FET Buck Controller for High-Power LED Drivers datasheet (Rev. L) May 23, 2016
Technical articles Dimming in switched-mode LED drivers Aug. 13, 2018
Selection guide Power Management Guide 2018 (Rev. R) Jun. 25, 2018
White paper LED Drivers for Automotive Exterior Applications (Rev. B) Mar. 27, 2018
Technical articles Color the world with what’s next in RGBW LED light source technology – part 2 Aug. 16, 2017
Technical articles Color the world with what’s next in RGBW LED light source technology – part 1 Aug. 03, 2017
Technical articles Here's how body electronics and lighting technology are changing the driving experience Sep. 26, 2016
Application note AN-1656 Design Challenges of Switching LED Drivers (Rev. A) May 03, 2013
User guide AN-1953 LM3409HV Evaluation Board (Rev. D) May 01, 2013
User guide AN-1954 LM3409 Demonstration Board (Rev. D) May 01, 2013
Application note AN-1982 Small, Wide Input Voltage Range LM2842 Keeps LEDs Cool (Rev. A) Apr. 23, 2013
Application note Dimming Techniques for Switched-Mode LED Drivers Jul. 30, 2009

Design & development

For additional terms or required resources, click any title below to view the detail page where available.

Hardware development

EVALUATION BOARD Download
75
Description

This demonstration board showcases the LM3409 PFET controller for a buck current regulator. It is designed to drive 4 LEDs (VO = 15V) at a maximum average LED current (ILED = 1A) from a DC input voltage (VIN = 24V). The switching frequency (fSW = 525 kHz) is targeted for the nominal operating point (...)

Design tools & simulation

SIMULATION MODEL Download
SNVM064.ZIP (74 KB) - PSpice Model
SIMULATION MODEL Download
SNVM350.ZIP (69 KB) - PSpice Model
SIMULATION MODEL Download
SNVM420.ZIP (14 KB) - TINA-TI Spice Model
SIMULATION MODEL Download
SNVM421.TSC (580 KB) - TINA-TI Reference Design
SIMULATION TOOL Download
PSpice® for TI design and simulation tool
PSPICE-FOR-TI — PSpice® for TI is a design and simulation environment that helps evaluate functionality of analog circuits. This full-featured, design and simulation suite uses an analog analysis engine from Cadence®. Available at no cost, PSpice for TI includes one of the largest model libraries in the (...)
Features
  • Leverages Cadence PSpice Technology
  • Preinstalled library with a suite of digital models to enable worst-case timing analysis
  • Dynamic updates ensure you have access to most current device models
  • Optimized for simulation speed without loss of accuracy
  • Supports simultaneous analysis of multiple products
  • (...)

Reference designs

REFERENCE DESIGNS Download
100-W, High-Resolution, 16-bit Color-Tunable, 0.15% Dimmable RGBW LED Luminaire Reference Design
TIDA-01415 — This reference design demonstrates the finest range of color control of individual RGBW LED strings with > 16 bits of PWM resolution while supporting the PWM modulation frequencies as high as 30 and 50 kHz. This reference design demonstrates the finest range of individual RGBW LED strings color (...)
document-generic Schematic
REFERENCE DESIGNS Download
100-240VAC Input, 60W, 2-string, PWM Dimmable LED Driver Reference Design
PMP6024 PMP6024 is an offline, LED driver circuit consisting of an isolated, power-factor corrected, constant output voltage flyback converter followed by two DC/DC buck LED current controllers.  It is suitable for indoor or outdoor area lighting applications of 3500-5000 lumens (depending upon LED (...)
document-generic Schematic
REFERENCE DESIGNS Download
Universal Current Limiter based on a LED driver
PMP8531 — This design is a current limiter based on a LED driver. It can be used for various applications and changed easily to a different current limit. PMP8531 uses LM3409 buck controller. An excel spreadsheet shows two different configurations (current source or eletrical fuse) and helps the designer to (...)
Design files
REFERENCE DESIGNS Download
24V input to 14V@6A, Non Sync Buck LED Driver
PMP7761 — It is a High current Non Synchronous buck DC-DC LED driver. The LM3409 uses Constant Off-Time (COFT) control to regulate an accurate constant current without the need for external control loop compensation. Analog and PWM dimming are easy to implement and result in a highly linear dimming range with (...)
Design files
REFERENCE DESIGNS Download
Non sync buck controller with 32 to 36V input and 29.2V @ 6A output
PMP7757 — PMP7757 is a non-synchronous buck controller with 32V to 36V DC input and 29.2V@ 6A output.
Design files
REFERENCE DESIGNS Download
Non sync buck controller with 24V input and 18V @ 4.2A output
PMP7755 — PMP7755 is a non-synchronous buck controller for LM3409 with 24V DC input and 18V output @ 4.2A. The load is 9 strings with 6 LEDs per string. It uses a motion detector with PIR (passive infarared) dimming as well as 0-10V analog dimming. It has differential high side current sensing which enables (...)
Design files

CAD/CAE symbols

Package Pins Download
HVSSOP (DGQ) 10 View options

Ordering & quality

Information included:
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  • Lead finish/Ball material
  • MSL rating/Peak reflow
  • MTBF/FIT estimates
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  • Qualification summary
  • Ongoing reliability monitoring

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