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Onsemi NCP4305 | Demoboard EVBUM2341/D
Secondary Side Synchronous Rectification Driver for High Efficiency SMPS Topologies
Details
| Topologie | LLC Resonanzwandler |
| Eingangsspannung | 85-260 V |
| Ausgang 1 | 19.5 V / 7.7 A |
| IC-Revision | 1 |
Beschreibung
This evaluation board user’s manual provides elementary information about a high efficiency, low no-load power consumption reference design that is targeting power laptop adapter or similar type of equipment that accepts 19.5 VDC on the input.The power supply implements PFC front stage to assure unity power factor and low THD, current mode LLC power stage to enhance transient response and secondary side synchronous rectification to maximize efficiency. This design focuses mainly on the NCP1399 current mode LLC controller description – please refer to NCP1602 and NCP4305 material to gain more information about these devices.The NCP1399 is a current mode LLC controller which means that the operating frequency of an LLC converter is not controlled via voltage (or current) controlled oscillator but is directly derived from the resonant capacitor voltage signal and actual feedback level. This control technique brings several benefits compare to traditional voltage mode controllers like improved line and load transient response and inherent out of zero voltage switching protection. The LLC controller also features built-in high voltage startup and PFC operation control pins that ease implementation of a power supply with PFC front stage and no standby power supply on board.The enhanced light lad operation of the LLC controller allows SMPS design to pass the latest no-load and light load consumption limits and still keeping output regulated with excellent transient response from no-load to full-load steps.
Eigenschaften
- Wide Input Voltage Range
- Small Form Factor/High Power Density
- High Efficiency
- Low No-load Power Consumption
- Fast Startup
- X2 Capacitor Discharge Function
- Near Unity Power Factor
- Low Mains Operation Protection
- Overload Protection
- Secondary Short Circuit Protected
- Thermal Protection
- Regulated Output Under any Conditions
- Excellent Load and Line Transient Response
- Capability to Implement Off-mode for Extremely Low No-load Power Consumption
Typische Anwendungen
- High Power Density AC/DC Power Supplies
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | C | VR(V (AC)) | Sicherheitsklasse | dV/dt(V/µs) | DF @ 1 kHz(%) | RISO | Raster(mm) | L(mm) | B(mm) | H(mm) | Verpackung | Endurance(h) | IRIPPLE(mA) | ILeak(µA) | DF(%) | Ø D(mm) | VRMS(V) | VDC(V) | VBR(V) | IPeak(A) | Wmax(J) | PDiss(W) | VDE-Zulassung | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | WE-VD Disk Varistor, 230 VAC, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-VD Disk Varistor | – | – | – | – | – | – | – | Länge12.5 mm | Breite4.4 mm | Höhe16 mm | – | – | – | – | – | Durchmesser12.5 mm | Wechselstrom Betriebsspannung275 V | DC Betriebsspannung350 V | (Rückwärts-) Durchbruchspannung430 V | (Reverse) Peak Pulse Current2500 A | Energieabsorption66 J | Verlustleistung0.4 W | VDE-ZulassungJa | ||||
 | WCAP-FTXX Folienkondensatoren, Across the mains, 330 nF | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-FTXX Folienkondensatoren | Kapazität330 nF | Nennspannung310 V (AC) | SicherheitsklasseX2 | Spannungsanstiegsgeschwindigkeit260 V/µs | Verlustfaktor0.1 % | Isolationswiderstand30 GΩ | Raster12.5 mm | Länge15 mm | Breite8.5 mm | Höhe14 mm | VerpackungLose | – | – | – | – | – | – | – | – | – | – | – | – | ||||
 | WCAP-ATG5 Aluminium-Elektrolytkondensatoren, –, 680 µF | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-ATG5 Aluminium-Elektrolytkondensatoren | Kapazität680 µF | Nennspannung25 V (AC) | – | – | – | – | Raster5 mm | Länge16 mm | – | – | VerpackungAmmopack | Endurance 2000 | Rippelstrom520 mA | Leckstrom170 µA | Verlustfaktor14 % | Durchmesser10 mm | – | – | – | – | – | – | – |