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Texas Instruments UCC28742 | Demoboard PMP31087
31-W offline valley-switching flyback with multiple outputs reference design
Details
| Topologie | Sperrwandler |
| Eingangsspannung | 85-265 V |
| Schaltfrequenz | 80 kHz |
Beschreibung
This reference design uses the UCC28742 flyback controller to generate two outputs (12 V at 2.2 A and 3.3 V at 1.5 A) from a universal input. UCC28742 uses an optical coupler to regulate the output and improve transient response. The valley-switching technique reduces switching losses and keeps the efficiency high.
Eigenschaften
- Resonant-ring valley-switching operation
- Dual isolated outputs consisting of 12 V at 2.2 A and 3.3 V at 1.5 A
- Universal AC-input voltage range of 85 VAC to 265 VAC
- Output over-voltage and over-current protection
- Complete tested design with available design files and test report
Typische Anwendungen
- Industrial and Medical AC-to-DC Power Supplies, Smart Electricity Meters, Bias Supply for UPS, Server PSU, etc, Power Supply for Cable Modem, Power Supply for Cable Modem, Television, SetTop Box, and Wireless Routers
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | C | Sicherheitsklasse | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Raster(mm) | Verpackung | ISAT,10%(A) | fres(MHz) | Version | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | DF(%) | Ø D(mm) | IR(A) | L(mH) | RDC max.(mΩ) | VR(V (AC)) | VT(V (AC)) | Material | L(mm) | B(mm) | H(mm) | Montageart | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WCAP-FTX2 Folienkondensatoren, Across the mains, 220 nF | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-FTX2 Folienkondensatoren | Kapazität220 nF | SicherheitsklasseX2 | Spannungsanstiegsgeschwindigkeit180 V/µs | Verlustfaktor0.1 % | Isolationswiderstand30 GΩ | Raster15 mm | VerpackungKarton | – | – | – | – | – | – | – | – | – | – | – | Nennspannung275 V (AC) | – | – | Länge18 mm | Breite6 mm | Höhe11.5 mm | MontageartBoxed THT | ||||
 | WE-CMB Stromkompensierte Netzdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-CMB Stromkompensierte Netzdrossel | – | – | – | – | – | – | – | – | – | VersionTHT | – | – | – | – | – | Nennstrom1.5 A | Induktivität20 mH | Gleichstromwiderstand270 mΩ | Nennspannung250 V (AC) | Prüfspannung1500 V (AC) | MaterialMnZn | Länge23 mm | Breite13.8 mm | Höhe25.5 mm | MontageartTHT | ||||
 | WE-TI Tonneninduktivität, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-TI Tonneninduktivität | – | – | – | – | – | – | – | Sättigungsstrom 10.75 A | Eigenresonanzfrequenz2.3 MHz | VersionSchrumpfschlauch | – | – | – | – | – | Nennstrom0.42 A | Induktivität0.68 mH | Gleichstromwiderstand2200 mΩ | – | – | – | Länge9.5 mm | Breite9.5 mm | Höhe8 mm | MontageartTHT | ||||
 | WCAP-AT1H Aluminium-Elektrolytkondensatoren, –, 33 µF | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-AT1H Aluminium-Elektrolytkondensatoren | Kapazität33 µF | – | – | – | – | Raster7.5 mm | VerpackungAmmopack | – | – | – | Endurance 10000 | Rippelstrom870 mA | Leckstrom628 µA | Verlustfaktor20 % | Durchmesser18 mm | – | – | – | Nennspannung400 V (AC) | – | – | Länge21 mm | – | – | – |