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DC-DC LED Drivers | NCV78763
概览
NCV78763 是一款单芯片、高能效智能电力镇流器和双 LED 驱动器，用于汽车前照明应用，如远光灯、近光灯、日间行车灯 (DRL)、转向指示灯、雾灯、静态转弯灯等。 NCV78763 最适用于高电流 LED，通过两个内部独立的降压开关沟道输出以及极少的外部部件为驱动最高 60 V 的两个串联灯组提供了完整的方案。对于每个单独的 LED 沟道，可以根据应用要求定制输出电流和电压。提供用于汽车前照明的片上诊断功能，简化了从微控制器进行的安全性监控。该器件集成了电流模式电压升压控制器，实现了独特的输入电流滤波，且仅需有限的物料。 一个模块上需要多于两个 LED 沟道时，可以组合两个、三个或多个 NCV78763 器件，因此升压电路可在多相模式下运行。这有助于进一步优化升压电路的滤波效应，为中高功率 LED 系统实现成本高效的尺寸确定。 由于 SPI 可编程能力，一个硬件装置可以支持多个系统配置，实现灵活的平台解决方式。
应用
- Front Lighting High Beam and Low Beam
- Day time Running Light (DRL)
- Position or Park light
- Turn Indicator
- Fog Light and Static Cornering
终端产品
- Automotive
特性
- Single Chip Boost−Buck Solution
- Two LED Strings up to 60 V
- High Current Capability up to 1.6 A 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
- High Operating Frequencies to Reduce Inductor Sizes
- Integrated PWM Dimming with Wide Frequency Range
- Low EMC Emission for LED switching and dimming
- SPI Interface for Dynamic Control of System Parameters
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