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Details
| Topologie | Sperrwandler |
| Eingangsspannung | 10-38 V |
| Schaltfrequenz | 0.5-150 kHz |
| Ausgang 1 | 48 V |
| Ausgang 2 | 12 V |
| Ausgang 3 | 24 V |
| IC-Revision | A |
Beschreibung
The LT®3798 is a constant-voltage/constant-current isolated flyback controller that combines active power factor correction (PFC) with no opto-coupler required for output voltage feedback into a single-stage converter. A LT3798 based design can achieve a power factor of greater than 0.97 by actively modulating the input current, allowing compliance with most Harmonic Current Emission requirements.
The LT3798 is well suited for a wide variety of off-line applications. 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 output power levels up to 100W. In addition, the LT3798 can easily be designed into high DC input applications.
Eigenschaften
- Isolated PFC Flyback with Minimum Number of External 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
Remarks:-Refer page 14Table 1. Predesigned Transformers-Typical Specification,Unless Otherwise Noted
Typische Anwendungen
- High DC VIN Isolated Applications
- Offline Bus Converter (12V, 24V or 48V Outputs)
- Offline 5W to 100W+ Applications
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | Vin | VOut1(V) | IOut1(mA) | 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) | B(mm) | H(mm) | Montageart | Bauform | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-OLLT Offline Flyback Transformers, 85 - 141 V (AC), 11 V | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-OLLT Offline Flyback Transformers | Input Voltage 85 - 141 V (AC) | Ausgangsspannung 111 V | Ausgangsstrom 1350 mA | Hilfsspannung15 V | Gleichstromwiderstand 15.1 Ω | Gleichstromwiderstand 20.092 Ω | Gleichstromwiderstand 31.35 Ω | Switching Frequency 100 | Induktivität2 mH | Übersetzungsverhältnis6.67:1:1.67 | Sättigungsstrom270 mA | Prüfspannung4500 V (AC) | Länge15 mm | Breite15.75 mm | Höhe18.5 mm | MontageartTHT | BauformEE13/6/6 | ||||
 | WE-OLLT Offline Flyback Transformers, 85 - 265 V (AC), 28 V | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-OLLT Offline Flyback Transformers | Input Voltage 85 - 265 V (AC) | Ausgangsspannung 128 V | Ausgangsstrom 1500 mA | Hilfsspannung20 V | Gleichstromwiderstand 12.4 Ω | Gleichstromwiderstand 20.241 Ω | Gleichstromwiderstand 31.55 Ω | Switching Frequency 100 | Induktivität0.6 mH | Übersetzungsverhältnis4:1:0.71 | Sättigungsstrom1750 mA | Prüfspannung4500 V (AC) | Länge18.5 mm | Breite16.5 mm | Höhe18.8 mm | MontageartTHT | BauformEE16/7/5 | ||||
 | WE-OLLT Offline Flyback Transformers, 85 - 265 V (AC), 18 V | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-OLLT Offline Flyback Transformers | Input Voltage 85 - 265 V (AC) | Ausgangsspannung 118 V | Ausgangsstrom 15000 mA | Hilfsspannung18 V | Gleichstromwiderstand 10.15 Ω | Gleichstromwiderstand 20.008 Ω | Gleichstromwiderstand 30.042 Ω | Switching Frequency 200 | Induktivität0.3 mH | Übersetzungsverhältnis6:1:1 | Sättigungsstrom4000 mA | Prüfspannung4500 V (AC) | Länge39.6 mm | Breite43.18 mm | Höhe30.48 mm | MontageartTHT | BauformETD34 |