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Details
| Topologie | Sperrwandler |
| Eingangsspannung | 400 V |
| Schaltfrequenz | 135-560 kHz |
| Ausgang 1 | 36 V / 4 A |
| IC-Revision | E |
Beschreibung
The LM5021 off-line pulse width modulation (PWM) controller contains all of the features needed to implement highly efficient off-line single-endedflyback and forward power converters using currentmode control. The LM5021 features include an ultra- low (25 µA) start-up current, which minimizes power losses in the high voltage start-up network. A skip cycle mode reduces power consumption with light loads for energy conserving applications (ENERGY STAR®, CECP, etc.). Additional features includeunder-voltage lockout, cycle-by-cycle current limit, hiccup mode overload protection, slope com- pensation, soft-start and oscillator synchronizationcapability. This high performance 8-pin IC has total propagation delays less than 100nS and a 1MHz capable oscillator that is programmed with a singleresistor.
Eigenschaften
- Ultra Low Start-up Current (25 µA maximum)
- Current Mode Control
- Skip Cycle Mode for Low Standby Power
- Single Resistor Programmable Oscillator
- Synchronizable Oscillator
- Adjustable Soft-Start
- Integrated 0.7A Peak Gate Driver
- Direct Opto-Coupler Interface
- Maximum Duty Cycle Limiting (80% for LM5021-1 or 50% for LM5021-2)
- Slope Compensation for (LM5021-1 Only)
- Under Voltage Lockout (UVLO) with Hysteresis
- Cycle-by-Cycle Over-Current Protection
- Hiccup Mode for Continuous Overload Protection
- Leading Edge Blanking of Current Sense Signal
- Packages: VSSOP-8 or PDIP-8
Typische Anwendungen
- Isolated Telecom Power SuppliesIsolated Telecom Power Supplies
- Audio Amplifiers
- SMPS for Smart Meters
- Building Automation and White Goods SMPS
- Industrial Power Conversion
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | C | Tol. C | Bauform | Betriebstemperatur | DF(%) | RISO | Keramiktyp | Fl(mm) | Verpackung | ISAT(A) | fres(MHz) | Version | IRP,40K(A) | ISAT,10%(A) | ISAT,30%(A) | IR(A) | L(mH) | RDC max.(mΩ) | VR(V (DC)) | VT(V (AC)) | Material | L(mm) | B(mm) | H(mm) | Montageart | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 50 V(DC), 1 µF, ±10% | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 50 V(DC) | Kapazität1 µF | Kapazität±10% | Bauform0805 | Betriebstemperatur -55 °C up to +125 °C | Verlustfaktor10 % | Isolationswiderstand0.1 GΩ | KeramiktypX7R Klasse II | Pad Dimension0.5 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | – | – | Nennspannung50 V (DC) | – | – | Länge2 mm | Breite1.25 mm | Höhe1.25 mm | – | |||||
 | WE-CMB Stromkompensierte Netzdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-CMB Stromkompensierte Netzdrossel | – | – | BauformL | Betriebstemperatur -40 °C up to +125 °C | – | – | – | – | – | – | – | VersionTHT | – | – | – | Nennstrom4 A | Induktivität3.3 mH | Gleichstromwiderstand35 mΩ | Nennspannung250 V (DC) | Prüfspannung1500 V (AC) | MaterialMnZn | Länge27.5 mm | Breite18.5 mm | Höhe33 mm | MontageartTHT | ||||
 | WE-FI Funkentstördrossel, –, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-FI Funkentstördrossel | – | – | – | Betriebstemperatur -40 °C up to +105 °C | – | – | – | – | – | – | – | – | – | – | – | Nennstrom8 A | Induktivität0.029 mH | Gleichstromwiderstand15 mΩ | – | – | – | Länge19 mm | Breite11.1 mm | – | MontageartTHT | |||
 | WE-SPC SMT-Speicherdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-SPC SMT-Speicherdrossel | – | – | Bauform4838 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | – | – | Sättigungsstrom1.4 A | Eigenresonanzfrequenz19 MHz | VersionSMT | – | – | – | Nennstrom1.1 A | Induktivität0.022 mH | Gleichstromwiderstand213 mΩ | – | – | – | Länge4.8 mm | Breite4.8 mm | Höhe3.8 mm | MontageartSMT | ||||
 | WE-PD2 SMT-Speicherdrossel, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-PD2 SMT-Speicherdrossel | – | – | Bauform4532 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | – | – | Sättigungsstrom2.46 A | Eigenresonanzfrequenz50 MHz | – | Performance Nennstrom2.6 A | Sättigungsstrom 12.9 A | Sättigungsstrom @ 30%3.3 A | Nennstrom1.82 A | Induktivität0.0047 mH | Gleichstromwiderstand110 mΩ | – | – | – | Länge4 mm | Breite4.5 mm | Höhe3.2 mm | MontageartSMT | ||||
 | WE-TI Tonneninduktivität, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-TI Tonneninduktivität | – | – | Bauform8055 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | – | – | Sättigungsstrom0.9 A | Eigenresonanzfrequenz9.4 MHz | VersionSchrumpfschlauch | – | Sättigungsstrom 11.2 A | Sättigungsstrom @ 30%1.4 A | Nennstrom1.1 A | Induktivität0.1 mH | Gleichstromwiderstand1000 mΩ | – | – | – | Länge8.5 mm | Breite8.5 mm | Höhe5.5 mm | MontageartTHT | ||||
 | 7508110338 | Offline Transformer, –, – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | Produktserie Offline Transformer | – | – | BauformEE16/8/5 | – | – | – | – | – | – | Sättigungsstrom0.325 A | – | – | – | – | – | – | Induktivität1.5 mH | – | – | Prüfspannung4000 V (AC) | – | Länge20.32 mm | Breite24.38 mm | Höhe16 mm | MontageartTHT |