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Overview
| Topology | Flyback Converter |
| IC revision | A |
Description
The LT®3798 is a constant-voltage/constant-current isolatedflyback controller that combines active power factorcorrection (PFC) with no opto-coupler required for outputvoltage feedback into a single-stage converter. A LT3798based design can achieve a power factor of greater than 0.97by actively modulating the input current, allowing compliancewith most Harmonic Current Emission requirements.The LT3798 is well suited for a wide variety of off-lineapplications. The input range can be scaled up or down,depending mainly on the choice of external components.Efficiencies higher than 86% can be achieved with outputpower levels up to 100W. In addition, the LT3798 can easilybe designed into high DC input applications.
Features
- Isolated PFC Flyback with Minimum Number ofExternal Components
- VIN and VOUT Limited Only by External Components
- Active Power Factor Correction
- Low Harmonic Distortion
- No Opto-Coupler Required
- Constant-Current and Constant-Voltage Regulation
- Accurate Regulated Voltage and Current (±5% Typical)
- Energy Star Compliant (<0.5W No Load Operation)
- Thermally Enhanced 16-lead MSOP Package
More information
Products
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN (V) | VOut1 (V) | IOut1 (A) | Vaux (V) | RDC 1 (Ω) | RDC 2 (Ω) | RDC 3 (Ω) | RDC 4 (Ω) | fswitch (kHz) | L (µH) | NPRI : NSEC : NAUX | ISAT (A) | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Size | Samples | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 750312872 | SPEC | 5 files | Transformer | 20 - 60 | 28 | 4 | 24 | 0.011 | 0.035 | 0.011 | – | 50 | 14 | 1:1:0.8 | 25.9 | 1500 | 39.6 | 43.18 | 30.84 | THT | ETD34 | ||
 | 7508110210 | SPEC | 7 files | WE-OLLT Offline Flyback Transformers | 85 - 141 V (AC) | 11 | 0.35 | 15 | 5.1 | 0.092 | 1.35 | – | 100 | 2000 | 6.67:1:1.67 | 0.27 | 4500 | 15 | 15.75 | 18.5 | THT | EE13/6/6 | ||
 | 750813144 | SPEC | 7 files | WE-OLLT Offline Flyback Transformers | 85 - 265 V (AC) | 28 | 0.5 | 20 | 2.4 | 0.241 | 1.55 | – | 100 | 600 | 4:1:0.71 | 1.75 | 4500 | 18.5 | 16.5 | 18.8 | THT | EE16/7/5 | ||
 | 750811248 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | 8 files | WE-OLLT Offline Flyback Transformers | 85 - 265 V (AC) | 24 | 2 | 24 | 0.155 | 0.125 | 0.025 | 0.185 | 60 - 400 | 300 | 2:2:1:1 | 3.5 | 4500 | 31 | 31 | 25 | THT | ER28/14 | ||
| 750811290 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | 8 files | WE-OLLT Offline Flyback Transformers | 85 - 265 V (AC) | 125 | 0.36 | 21.25 | 0.6 | 0.254 | 0.11 | – | 150 | 461 | 1:1:0.17 | 3.15 | 4500 | 31 | 31 | 25 | THT | ER28/14 | ||
| 750811291 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | 8 files | WE-OLLT Offline Flyback Transformers | 85 - 265 V (AC) | 85 | 0.4 | 20 | 0.55 | 1.23 | 1.1 | – | 60 | 400 | 1:1:0.24 | 5.7 | 4500 | 31 | 31 | 25 | THT | ER28/14 | ||
 | 750811330 | SPEC | 8 files | WE-OLLT Offline Flyback Transformers | 85 - 265 V (AC) | 18 | 5 | 18 | 0.15 | 0.008 | 0.042 | – | 200 | 300 | 6:1:1 | 4 | 4500 | 39.6 | 43.18 | 30.48 | THT | ETD34 | ||
| 750813390 | SPEC | 8 files | WE-OLLT Offline Flyback Transformers | 85 - 265 V (AC) | 90 | 1 | 19.8 | 0.15 | 0.223 | 0.055 | – | 75 | 100 | 1:1:0.22 | 9 | 4500 | 39.6 | 43.18 | 30.48 | THT | ETD34 | ||
| 750813002 | SPEC | 7 files | WE-OLLT Offline Flyback Transformers | 90 - 265 V (AC) | 3.4 | 1 | 17 | 6.25 | 0.016 | 1.7 | – | 100 | 2000 | 20:1:5 | 0.35 | 4500 | 15 | 15.75 | 18.5 | THT | EE13/6/6 | ||
| 750813134 | SPEC | 7 files | WE-OLLT Offline Flyback Transformers | 90 - 265 V (AC) | 14 | 1 | 18 | 1.85 | 0.06 | 1.35 | – | 100 | 600 | 8:1:1.29 | 1.75 | 4500 | 18 | 16.5 | 18 | THT | EE16/7/5 |
| Order Code | Datasheet | Simulation | |
|---|---|---|---|
| 750312872 | SPEC | |
| 7508110210 | SPEC | |
| 750813144 | SPEC | |
| 750811248 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | |
| 750811290 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | |
| 750811291 | SPEC PCN pendingDue to a pending PCN, a modification of the component will be implemented soon. Please find the PCN below. If you have further questions please get in contact with our sales staff. | |
| 750811330 | SPEC | |
| 750813390 | SPEC | |
| 750813002 | SPEC | |
| 750813134 | SPEC |
| Samples |
|---|
| Order Code | Datasheet | Simulation | Downloads | Product series | VIN (V) | VOut1 (V) | IOut1 (A) | Vaux (V) | RDC 1 (Ω) | RDC 2 (Ω) | RDC 3 (Ω) | RDC 4 (Ω) | fswitch (kHz) | L (µH) | NPRI : NSEC : NAUX | ISAT (A) | VT (V (AC)) | L (mm) | W (mm) | H (mm) | Mount | Size | Samples |
|---|