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Analog Devices LT3922 | Demoboard DN557
Low EMI LED Driver Features 2A, 40V, Integrated, Synchronous Switches for Automotive Lighting
Details
| Topologie | Abwärts- und Aufwärtswandler |
| Eingangsspannung | 4-18 V |
| Ausgang 1 | 16 V / 0.33 A |
Beschreibung
The breadth of LED applications has grown to encompasseverything from general lighting to automotive,industrial and test equipment, sign boards and safetyinstruments. Feature requirements for LED drivershave become more extensive. The latest LED solutionsrequire drivers that are compact, efficient, lownoise, and have high dimming ratios and advancedfault protection. The LT3922 meets these demands.The LT3922 synchronous LED driver with integrated2A, 40V switches can be configured as a boost, buckor boost-buck LED driver. Its high efficiency integratedswitches fit into a tiny 4mm × 5mm QFN package. Thisdevice integrates Linear’s most advanced switchingtechnologies, condensing high power capability intotight spaces while controlling the edge rates and mitigatingunwanted EMI. The LT3922 features controlledswitching edges that do not ring—offering just theright balance of high efficiency and low noise. Theycan be run at up to 2.5MHz for compact solutions.The tiny LT3922 LED driver features low EMI, highefficiency and fault protection required in automotiveenvironments. It can handle 36V automotivetransients and 3V cold crank. Its Silent Switcher®architecture, spread spectrum frequency modulation(SSFM) and controlled switching edges makeit ideal for powering LEDs with low EMI. Its flexibletopology is useful in daytime running lights, signallights, taillights, and headlight segments as well asdashboard and heads-up displays with high dimmingratios. Built-in fault protection reduces the number ofextra components required to protect against shortand open LEDs.
Weiterführende Informationen
Artikeldaten
Artikel Nr. | Datenblatt | Simulation | Downloads | Status | Produktserie | Z @ 100 MHz(Ω) | Zmax(Ω) | Testbedingung Zmax | IR 2(mA) | RDC max.(Ω) | Typ | L1(µH) | L2(µH) | IR 1(mA) | ISAT 1(A) | RDC1 typ(Ω) | RDC2 typ(Ω) | RDC1 max(Ω) | RDC2 max(Ω) | fres(MHz) | MusterVerfügbarkeit & Muster | ||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | SPECWE-CBF SMT-Ferrit, 600 Ω, 700 Ω | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-CBF SMT-Ferrit | Impedanz @ 100 MHz600 Ω | Maximale Impedanz700 Ω | Maximale Impedanz150 MHz | Nennstrom 22000 mA | Gleichstromwiderstand0.15 Ω | TypHochstrom | Induktivität 152000000 µH | – | Nennstrom 11500 mA | – | – | – | – | – | – | –Verfügbarkeit prüfen | |||
| SPECWE-CBF SMT-Ferrit, 1500 Ω, 1800 Ω | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-CBF SMT-Ferrit | Impedanz @ 100 MHz1500 Ω | Maximale Impedanz1800 Ω | Maximale Impedanz70 MHz | Nennstrom 21000 mA | Gleichstromwiderstand0.3 Ω | TypHochstrom | – | – | Nennstrom 1700 mA | – | – | – | – | – | – | –Verfügbarkeit prüfen | |||
 | SPECWE-DD SMT-Doppeldrossel, –, – | Verfügbarkeit – | Status Aktivi| Produktion ist aktiv. Erwartete Lebenszeit: >10 Jahre. | ProduktserieWE-DD SMT-Doppeldrossel | – | – | – | Nennstrom 21100 mA | Gleichstromwiderstand0.12 Ω | TypGerade | Induktivität 110 µH | Induktivität 210 µH | Nennstrom 11100 mA | Sättigungsstrom [1]2.8 A | Gleichstromwiderstand 10.11 Ω | Gleichstromwiderstand 20.11 Ω | Gleichstromwiderstand 10.12 Ω | Gleichstromwiderstand 20.12 Ω | Eigenresonanzfrequenz27 MHz | –Verfügbarkeit prüfen |
| Erwartete Verfügbarkeit | Eingehender Bestand | Menge |
|---|---|---|
| Aktuelle Verfügbarkeit | – | – |