NCV7681 100 mA Linear Current Regulator and Controller for Automotive LED Lighting The NCV7681 consists of eight linear programmable constant current sources. The part is designed for use in the regulation and www.onsemi.com control of LED based Rear Combination Lamps and blinking functions for automotive applications. System design with the MARKING NCV7681 allows for two programmed levels for stop (100% Duty DIAGRAM 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 NCV7681x to the absolute current value, tail is programmed to the duty cycle) AWLYYWWG SOIC16 WB with two external resistors. The use of an optional external ballast FET PW SUFFIX allows for power distribution on designs requiring high currents. Set CASE 751DW back power limit reduces the drive current during overvoltage conditions. This is most useful for low power applications when no NCV7681 = Specific Device Code external FET is used. x = A (No LatchOff Function) The device is available in a SOIC16 WB package with exposed pad. or L (LatchOff Function) A = Assembly Location Features WL = Wafer Lot Constant Current Outputs for LED String Drive YY = Year LED Drive Current up to 100 mA per Channel WW = Work Week G = PbFree Device Open LED String Diagnostic with OpenDrain Output in All Modes Slew Rate Control Eliminates EMI Concerns Low Dropout Operation for PreRegulator Applications ORDERING INFORMATION External Modulation Capable Device Package Shipping Onchip 800 Hz Tail PWM Dimming NCV7681APWR2G SOIC16WB 1000 / Single Resistor for Stop Current Set Point (PbFree) Tape & Reel Single Resistor for Tail Dimming Set Point NCV7681LPWR2G SOIC16WB 1000 / Overvoltage Set Back Power Limitation (PbFree) Tape & Reel AECQ100 Qualified and PPAP Capable For information on tape and reel specifications, 16 Lead SOICW Exposed Pad including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specifications Improved EMC Performance Brochure, BRD8011/D. LatchOff Function on Open String (NCV7681L) Restart Option of Unaffected Strings Over Temperature Fault Reporting These are PbFree Devices Applications 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 Semiconductor Components Industries, LLC, 2016 1 Publication Order Number: November, 2016 Rev. 1 NCV7681/DNCV7681 Open Load LatchOff Control DIAG Detection Interface CC VP EMC Filter UVLO Overvoltage Vreg 1 of 8 Ballast Soft Start, Drive Out1 Bias and Reference Output FB Channel Out2 Control Current Drive Out3 FET Drive 200K Over temperature & Over voltage sense Out4 Setback Out5 1V Current 20% Out6 Control Logic 50% IOUT Out7 Output STOP Open Load LatchOff Detect Out8 200K DIAG Vreg x 150 Oscillator I GND RSTOP and PWM Irstop 2.2V VI Converter 0.4V CC Rtail Pin Current Limit Open 1.8V Circuit Restart RSTOP RTAIL Boxes with dotted lines signify NCV7681L only. Figure 1. Block Diagram OUT1 OUT2 OUT3 VP OUT4 Ballast Drive FB GND EP STOP OUT5 DIAG OUT6 RSTOP OUT7 RTAIL OUT8 Figure 2. Pinout Diagram www.onsemi.com 2 DIAG Inverface + + +