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Overview
| Topology | Flyback Converter |
| Input voltage | 90-270 V |
| Output 1 | 4 V / 1 A |
| IC revision | 2 |
Description
Demonstration circuit 1744A is an off-line isolated flyback converter featuring the LT®3799. The demo board is designed to drive a single LED from an input voltage range of 90V AC to 270V AC. It is also designed to comply with IEC 61000-3-2 Class C harmonics standard and EN55015Bconducted EMI standard.
The LT3799 controls an isolated flyback converter in boundary mode, suitable for LED applications requiring 4W to over 100W of LED power. Its novel current sensing scheme delivers a well-regulated output current to the secondary side without using an opto-coupler. Its unique bleeder circuit makes the LED driver compatible with TRIAC dimmers without additional components. Openand shorted-LED protection ensures long-term reliability.
The LT3799 is available in a low profile, thermally-enhanced 16-lead MSOP package.
The LT3799 data sheet gives a complete description of the part, operation and application information. The data sheet must be read in conjunction with this quick start guide for demo circuit 1744A.
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (A) | Vaux (V) | RDC 1 (Ω) | RDC 2 (Ω) | RDC 3 (Ω) | fswitch (kHz) | L (mH) | NPRI : NSEC : NAUX | ISAT (mA) | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Size | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 750813002 | SPEC | 7 files | WE-OLLT Offline Flyback Transformers | 90 - 265 V (AC) | 3.4 | 1 | 17 | 6.25 | 0.016 | 1.7 | 100 | 2 | 20:1:5 | 350 | 4500 | 15 | 15.75 | 18.5 | THT | EE13/6/6 |
| Samples |
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| Order Code | Datasheet | Simulation | Downloads | Product series | VIN | VOut1 (V) | IOut1 (A) | Vaux (V) | RDC 1 (Ω) | RDC 2 (Ω) | RDC 3 (Ω) | fswitch (kHz) | L (mH) | NPRI : NSEC : NAUX | ISAT (mA) | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Size | Samples |
|---|