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Linear LED Drivers | NCV7685
概览
NCV7685 由十二个具有共同参考的线性可编程恒定电流源组成。该零件适用于汽车应用中基于 LED 的后尾组合灯调节和控制。NCV7685 通过 I2C 串行接口对于每个可编程输出沟道单独使用脉宽调制 (PWM)，因此可实现 128 级不同的占空比。PWM 频率可以四种不同的配置进行选择，最高为 1200 Hz。该器件可用于使用 I2C 总线的微控制器应用，或独立应用，在此类应用中可选择 2 种不同的静态配置设置。该集成电路还为高达 1 mA 的应用提供 3.3 V 的电压参考。LED 亮度使用外部电阻进行轻松编程。每个沟道都有一个内部电路来检测开路负载情况，且具有可选的自动恢复模式。如果一个驱动器为开路负载情况，所有其他沟道则可能根据可编程位设置进行关断。该器件采用小体型 SSOP24−EP 封装。
应用
- Entry Level LED Tail Lights. NCV7685 used without MCU
- Option Level LED Tail Lights with Sequential Turn Indicator. NCV7685 controlled by Low End MCU
- High End Pixelized LED Tail Light with Full Animation Capabilities
- Turn Signal and Other Externally Modulated Applications
- RGB LED driver (4 x RGB per NCV7685)
- Dashboard Applications
终端产品
- Exterior Lighting (Low Power)
- Interior Lighting
特性
- 12 Common Current Programmable Sources up to 60 mA
- Independent PWM Duty Cycle Control for each Channel via PC
- Common PWM Duty Cycle Control via I2C
- On−Chip 150, 300, 600 and 1200 Hz PWM
- Open LED String Diagnostics
- Low Dropout Operation for Pre−Regulator Applications
- Single Resistor for Current Set Point
- Voltage Reference 3.3 V/1 mA
- 8 Bits I2C Interface with CRC8 Error Detection
- OTP Bank for Stand−Alone Operation (2 Configurations)
- Output Enable Pin
- Detection and Protection Against Open Load and Under−Voltage
- Over Temperature Detection and Protection
- Low Emission with Spread Spectrum Oscillator
- NCV Prefix for Automotive and Other Applications RequiringUnique Site and Control Change Requirements; AEC−Q100Qualified and PPAP Capable
- SSOP24−EP Packaging
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