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Texas Instruments SN6505B | Demoboard PMP30555
3.5W isolated push-pull reference design for auxiliary power supply
Details
| Topologie | Gegentaktflusswandler |
| Eingangsspannung | 24 V |
| Ausgang 1 | 15 V / 0.12 A |
| Ausgang 2 | 5 V / 0.35 A |
| IC-Revision | 1 |
Beschreibung
This reference design is an isolated open-loop push-pull with “cascode” FETs that finds its typical application in isolated gate drive supply. The cascode connection extends the input voltage range of SN6505B from 5 V to 24 V, and two outputs supply 15 V at 120 mA and 5 V at 350 mA. Its 2-mm transformer makes the solution ultra-thin.
Eigenschaften
- Push-pull driver for transformers
- Wide input voltage range: 2.25 V to 5.5 V
- High output drive: 1 A at 5 V supply
- Low RON 0.25 Ω max at 4.5 V supply
- Ultra-low EMI
- Spread spectrum clocking
- Precision internal oscillator options: 160 kHz (SN6505A) and 420 kHz (SN6505B)
- Synchronization of multiple devices with external clock input
- Slew-rate control
- 1.7 A Current-limit
- Low shutdown current: <1 μA
- Thermal shutdown
- Wide temperature range: –55°C to 125°C
- Small 6-Pin SOT23 (DBV) package
- Soft-start to reduce In-rush current
Typische Anwendungen
- Medical instruments
- Isolated power supply for CAN, RS-485, RS-422, RS-232, SPI, I2C, low-power LAN / Distributed supplies / Low-noise filament supplies
- Process control / Precision instruments
- Telecom supplies / Radio supplies
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | C | Tol. C | VR(V (DC)) | Bauform | Betriebstemperatur | DF(%) | RISO | Keramiktyp | L(mm) | B(mm) | H(mm) | Fl(mm) | Verpackung | Vin | fswitch(kHz) | VOut1(V) | IOut1(mA) | VOut2(V) | IOut2(mA) | VOut3(V) | IOut3(mA) | VOut4(V) | IOut4(mA) | ∫Udt(Vs) | L(mH) | NPRI : NSEC | Isolierungstyp | VT(V (AC)) | Montageart | Muster | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WCAP-CSGP MLCCs 10 V(DC), 10 µF, ±10% | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWCAP-CSGP MLCCs 10 V(DC) | Kapazität10 µF | Kapazität±10% | Nennspannung10 V (DC) | Bauform0805 | Betriebstemperatur -55 °C up to +125 °C | Verlustfaktor10 % | Isolationswiderstand0.01 GΩ | KeramiktypX7R Klasse II | Länge2 mm | Breite1.25 mm | Höhe1.25 mm | Pad Dimension0.5 mm | Verpackung7" Tape & Reel | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | – | |||||
 | WE-PPTM Push-Pull Tiny Multi-Output Transformers, –, – | Simulation– | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-PPTM Push-Pull Tiny Multi-Output Transformers | – | – | – | Bauform1212 | Betriebstemperatur -40 °C up to +125 °C | – | – | – | Länge11.63 mm | Breite12.6 mm | Höhe1.98 mm | – | – | Input Voltage 24 V (DC) | Switching Frequency 400 | Ausgangsspannung 116.7 V | Ausgangsstrom 160 mA | Ausgangsspannung 25.8 V | Ausgangsstrom 2175 mA | Ausgangsspannung 3-5.8 V | Ausgangsstrom 3175 mA | Ausgangsspannung 4-16.7 V | Ausgangsstrom 460 mA | Spannung-µSekunde35 Vs | Induktivität1.47 mH | Übersetzungsverhältnis8.25:5.75:1:1 | IsolierungstypFunktional | Prüfspannung1500 V (AC) | MontageartSMT |