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Details
| Topologie | Abwärtswandler |
| Eingangsspannung | 18-560 V |
| Schaltfrequenz | 138-142 kHz |
| Ausgang 1 | 12 V / 0.8 A |
| IC-Revision | A |
Beschreibung
The LT®8315 is a high voltage flyback converter with integrated630V/300mA switch. No opto-isolator is needed forregulation. The device samples the output voltage from theisolated flyback waveform appearing across a third windingon the transformer. Quasi-resonant boundary modeoperation improves load regulation, reduces transformersize, and maintains high efficiency.At start-up, the LT8315 charges its INTVCC capacitor via acurrent source attached to the DRAIN pin. During normaloperation, the current source turns off and the devicedraws its power from a third winding on the transformer.The LT8315 operates from a wide range of input supplyvoltages and can deliver up to 15W of power. It is availablein a thermally enhanced 20-pin TSSOP package with fourpins removed for high-voltage spacing.
Eigenschaften
Remark: Design Note 559 contain same inputs, outputs and circuit diagram so datafile is addednn Wide Input Voltage Range: 18V to 560Vnn 630V/300mA Integrated Power Switchnn No Opto-Isolator Required for Regulationnn Quasi-Resonant Boundary Mode Operationnn Constant-Current and Constant-Voltage Regulationnn Low-Ripple Light Load Burst Mode® Operationnn Low Quiescent Current: 70μAnn Programmable Current Limit and Soft-Startnn TSSOP Package with High-Voltage Spacing
Typische Anwendungen
- Electric Vehicles and Battery Stacks
- Isolated Telecom, Automotive, Industrial, Medical Power Supplies, Isolated Off-Line Housekeeping Power Supplies
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | 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) | B(mm) | H(mm) | Montageart | Bauform | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-OLLT Offline Flyback Transformers, 99 - 269 V (AC), 12 V | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-OLLT Offline Flyback Transformers | Input Voltage 99 - 269 V (AC) | Ausgangsspannung 112 V | Ausgangsstrom 11 A | Hilfsspannung12 V | Gleichstromwiderstand 11.725 Ω | Gleichstromwiderstand 20.037 Ω | Gleichstromwiderstand 30.41 Ω | Switching Frequency 50 | Induktivität2.75 mH | Übersetzungsverhältnis10:1:1 | Sättigungsstrom500 mA | Prüfspannung4000 V (AC) | Länge22.25 mm | Breite14.6 mm | Höhe23.24 mm | MontageartTHT | BauformEE20/10/6 | ||||
| WE-OLLT Offline Flyback Transformers, 99 - 269 V (AC), 48 V | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-OLLT Offline Flyback Transformers | Input Voltage 99 - 269 V (AC) | Ausgangsspannung 148 V | Ausgangsstrom 10.3 A | Hilfsspannung12 V | Gleichstromwiderstand 11.4 Ω | Gleichstromwiderstand 20.425 Ω | Gleichstromwiderstand 30.32 Ω | Switching Frequency 50 | Induktivität2.4 mH | Übersetzungsverhältnis2.5:1:0.25 | Sättigungsstrom490 mA | Prüfspannung4000 V (AC) | Länge22.25 mm | Breite14.6 mm | Höhe23.24 mm | MontageartTHT | BauformEE20/10/6 | ||||
 | WE-OLLT Offline Flyback Transformers, 99 - 269 V (AC), 5 V | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-OLLT Offline Flyback Transformers | Input Voltage 99 - 269 V (AC) | Ausgangsspannung 15 V | Ausgangsstrom 11.6 A | Hilfsspannung20 V | Gleichstromwiderstand 14.55 Ω | Gleichstromwiderstand 20.015 Ω | Gleichstromwiderstand 30.695 Ω | Switching Frequency 100 | Induktivität3.3 mH | Übersetzungsverhältnis24:1:4 | Sättigungsstrom360 mA | Prüfspannung1500 V (AC) | Länge13.46 mm | Breite17.75 mm | Höhe12.7 mm | MontageartSMT | BauformEP13 |