LM3445 – 220VAC, 7W Dimmable Isolated


Design files


This demonstration board highlights the performance of a LM3445 based Flyback LED driver solution that can be used to power a single LED string consisting of 6 / 7 series connected LEDs from an 198 VRMS to 264 VRMS, 50 Hz input power supply. This is a two-layer board using the bottom and top layer for component placement. The demonstration board can be modified to adjust the LED forward current, the number of series connected LEDs that are driven and the switching frequency. Refer to the LM3445 datasheet for detailed instructions. A bill of materials is included that describes the parts used on this demonstration board.

Output voltage options PMP7751.1
Vin (Min) (V) 198
Vin (Max) (V) 264
Vout (Nom) (V) 20
Iout (Max) (A) .35
Output Power (W) 7
Isolated/Non-Isolated Isolated
Input Type AC
Topology Flyback- Non Sync

A fully assembled board has been developed for testing and performance validation only, and is not available for sale.

Design files & products

Design files

Download ready-to-use system files to speed your design process.

SNVU001.PDF (339 K)

Test results for the reference design, including efficiency graphs, test prerequisites and more

SNVR001.PDF (123 K)

Detailed schematic diagram for design layout and components

SNVR002.PDF (90 K)

Complete listing of design components, reference designators, and manufacturers/part numbers

SNVC001.ZIP (275 K)

Design file that contains information on physical board layer of design PCB

SNVU002.PDF (98 K)

PCB layer plot file used for generating PCB design layout

SNVU003.PDF (90 K)

PCB layer plot file used for generating PCB design layout


Includes TI products in the design and potential alternatives.

Illumination LED drivers

LM3445Triac dimmable offline LED driver

Data sheet document-pdfAcrobat PDF open-in-new HTML

Technical documentation

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Type Title Date
Test report PMP7751 Test Results Jan. 05, 2012

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