Forward converter with Universal input driving 2x6 LEDs


Design files


PMP7762 is an offline LED driver with TRIAC dimming. It has short circuit protection as well as op amp control for dimming. It uses 2 op amp control for each LED string to ensure that current in the LED strings match. LM3445 includes a bleeder circuit to ensure proper triac operation by allowing current flow while the line voltage is low to enable proper firing of the triac.

Output voltage options PMP7762.1
Vin (Min) (V) 85
Vin (Max) (V) 265
Vout (Nom) (V) 21
Iout (Max) (A) 2
Output Power (W) 42
Isolated/Non-Isolated Non-Isolated
Input Type AC
Topology Forward- Integrated Switch

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.

SNVU014.PDF (208 K)

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

SNVR023.PDF (109 K)

Detailed schematic diagram for design layout and components

SNVR024.PDF (83 K)

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


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 PMP7762 Test Results Jan. 06, 2012

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