onsemi NCV78763 Leistungsstarkes Vorschaltgerät und dualer LED-Treiber
Das leistungsstarke Vorschaltgerät mit dualem LED-Treiber NCV78763 von onsemiist ein Hochleistungs-Ein-Chip-Vorschaltgerät und Treiber. Es wurde für Kfz-Frontbeleuchtungsanwendungen wie Fernlicht, Abblendlicht, Tagfahrlicht (DRL), Richtungsanzeiger, Nebellicht, statisches Kurvenfahrlicht usw. entwickelt. Das NCV78763 ist die beste Lösung für Hochstrom-LEDs und steuert über zwei unabhängige interne Abwärtsschalter-Kanalausgänge mit einer minimalen Anzahl an externen Komponenten, zwei Ketten bis 60V an.
The output current and voltage can be customized according to the application requirements for each individual LED channel. A provided on−chip diagnostic feature for automotive front lighting eases the safety monitoring from the microcontroller. The device integrates a current−mode voltage booster controller, realizing a unique input current filter with a limited BOM.
More onsemi NCV78763 devices can be combined when more than two LED channels are required on one module, with the possibility for the booster circuits to operate in multiphase mode. This feature helps to further optimize the filtering effect of the booster circuit. It also allows cost-effective dimensioning for mid to high-power LED systems. Due to the SPI programmability, one single hardware setup can support multiple system configurations for a flexible platform solution approach.
Merkmale
- Single-chip boost-buck solution
- Two LED strings up to 60V
- High current capability up to 1.6A DC per output
- High overall system efficiency
- Minimum of external components
- Active input filter with low current ripple from battery
- Integrated switched-mode buck current regulator
- Integrated boost current-mode controller
- Programmable input current limitation
- Average current regulation through the LEDs
Applikationen
- Front lighting high beam and low beam
- Automotive
- Daytime Running Light (DRL)
- Position or park light
- Turn indicator
- Fog light and static cornering
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