onsemi NCV7681AGEVB

The NCV7681 consists of eight linear programmable constant current sources. The part is designed for use in the regulation and control of LED based Rear Combination Lamps and blinking functions for automotive applications. System design with the NCV7681 allows for two programmed levels for stop (100% Duty Cycle) and tail illumination (programmable Duty Cycle), or an optional external PWM control can be implemented. LED brightness levels are easily programmed (stop is programmed to the absolute current value, tail is programmed to the duty cycle) with two external resistors. The use of an optional external ballast FET allows for power distribution on designs requiring high currents. Set back power limit reduces the drive current during overvoltage conditions. This is most useful for low power applications when no external FET is used. The device is available in a SOIC−16 WB package with exposed pad. The NCV7681 device is an eight channel LED driver whose output currents up to 100 mA/channel are programmed by an external resistor. The target application for the device is in automotive Rear Combination Lighting (RCL) systems. The STOP logic input switches the two modes of the IC. While in the STOP mode (high), the duty cycle of the outputs is at 100%.

• Constant Current Outputs for LED String Drive
• LED Drive Current up to 100 mA per Channel
• Open LED String Diagnostic with Open−Drain Output in All Modes
• Slew Rate Control Eliminates EMI Concerns
• Low Dropout Operation for Pre−Regulator Applications
• External Modulation Capable
• On−chip 800 Hz Tail PWM Dimming
• Single Resistor for Stop Current Set Point
• Single Resistor for Tail Dimming Set Point
• Overvoltage Set Back Power Limitation
• AEC−Q100 Qualified and PPAP Capable
• 16 Lead SOICW Exposed Pad
• Improved EMC Performance
• Latch−Off Function on Open String (NCV7681L)
• Restart Option of Unaffected Strings
• Over Temperature Fault Reporting
• These are Pb−Free Devices

• Rear Combination Lamps (RCL)
• Daytime Running Lights (DRL)
• Fog Lights
• Center High Mounted Stop Lamps (CHMSL) Arrays
• Turn Signal and Other Externally Modulated Applications
• Signature Lamp