Topologie | Sperrwandler |
Eingangsspannung | 85-265 V |
Schaltfrequenz | 0.2-65 kHz |
Ausgang 1 | 5 V / 2 A |
IC-Revision | A |
The UCC28742 off-line flyback controller is a highlyintegrated, 6-pin secondary-side regulated PWMcontroller for efficient AC-to-DC power supplies. It isan isolated-flyback power-supply controller thatprovides Constant-Voltage (CV) using an opticalcoupler to improve transient response to large-loadsteps. This device processes information from opto-coupled feedback and an auxiliary flyback winding forhigh-performance control of output voltage andcurrent.The UCC28742 employs advanced control algorithmsto achieve high operating efficiency and performance.The drive output interfaces to a MOSFET powerswitch. Discontinuous conduction mode (DCM) withvalley-switching reduces switching losses. Modulationof switching frequency and primary current-peakamplitude (FM and AM) keeps the conversionefficiency high across the entire load and line ranges.The controller has a maximum switching frequency of80 kHz and always maintains control of the peak-primary current in the transformer. A minimumswitching frequency of 200 Hz facilitates theachievement of low no-load input power.
Artikel Nr. | Datenblatt | Simulation | Downloads | Produktserie | ISAT (A) | fres (MHz) | IR (A) | L (µH) | RDC max. (Ω) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Montageart | Muster | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
![]() | 768772221 | SPEC | 8 Dateien | WE-TI HV Tonneninduktivität (High Voltage) | 1.3 | 3.7 | 0.9 | 220 | 0.6 | – | – | – | 7.8 | 7.8 | 9.5 | THT | ||
![]() | 744821150 | SPEC | 9 Dateien | WE-CMB Stromkompensierte Netzdrossel | – | – | 1 | 5000 | 0.22 | 250 | 1500 | MnZn | 15 | 7.8 | 18 | THT | ||
750317656 | SPEC | – | – | Transformer | – | – | – | – | – | – | – | – | – | – | – | – |
Muster |
---|
Artikel Nr. | Datenblatt | Simulation | Downloads | Produktserie | ISAT (A) | fres (MHz) | IR (A) | L (µH) | RDC max. (Ω) | VR (V (AC)) | VT (V (AC)) | Material | L (mm) | W (mm) | H (mm) | Montageart | Muster |
---|