NCV78247 Series String Pixel Controller for Automotive (Front) Lighting Introduction The NCV78247 is a singlechip pixel controller with embedded www.onsemi.com switches to control the LEDs in a series LED string, designed for automotive lighting applications and it is in particular designed for high current LEDs. In order to make a pixel light solution, the LEDs needs to be powered by preference with a current source like the NCV78763 or NCV78723/713 or NCV78825 LED drivers. The SSOPEP NCV78247 pixel controller devices receive the pixel control 36 LEAD parameters from the pixel light ECU which translates the required CASE 940AB light pattern or light image into individual pixel dimming info. One pixel controller device can control upto 12 pixels of 1x or 2x or 3x or 4x 1A LEDs per pixel. The maximum LED string voltage has to be limited to 60 V. If more than 12 pixels need to be controlled, then multiple pixel NV782470 AWLYYWWG controllers can be combined in 1 system. The 12 integrated switches are typically organized as 12 x 1 switch of 1 A, but can be organized in 6 x 2 switches in parallel to offer 6 x 1 switch of 2 A. Besides that a configuration of two strings of 6 LEDs NV782470 = Specific Device Code can be supported too, also other variants are possible. A = Assembly Location WL = Wafer Lot Features YY = Year Single Chip WW = Work Week Integrated Switches with Multiple Configuration Options G = PbFree Package Minimum of External Components Dimming Controller ORDERING INFORMATION OV Detection Device Package Shipping Over Temp Protection NCV78247DQ0R2G SSOP36 EP 1500 / Tape & Short/open Circuit Detection (PFree) Reel Open LED Failure Automatic Bypass For information on tape and reel specifications, Communication Interface to the Pixel Light ECU via SPI including part orientation and tape sizes, please refer to our Tape and Reel Packaging Specification Switch Slew Rate Control Brochure, BRD8011/D. Individual Open/Short LED Diagnostic Feedback Typical Applications PWM + Phase Shift Unit per Channel Static Advanced Front Lighting Functions Efficient SPI Burst Data Transfer Glarefree High Beam Synchronization between Multiple Devices Static Swiveling This is a PbFree Device Beam Shaping NCV Prefix for Automotive and Other Applications Light Power Adjustment Requiring Unique Site and Control Change Animated Welcome Functions on Signal Lights Requirements AECQ100 Qualified and PPAP Wiping Blinker Capable Semiconductor Components Industries, LLC, 2015 1 Publication Order Number: September, 2017 Rev. 2 NCV78247/DNCV78247 LED driver C1 C2 VDD C2N C2P NCV78247 C4 Series string pixel controller VBB VDD C3 SW43 Xchannel OPA SW12 SYN dimming Levelshift / predriver (10bit) SW. OPA SWz Levelshift / predriver SW . Diagnostics SW13 OPA SW3 Levelshift / predriver SW1y CSB CLK V LED SDI and/or OPA SW1 V BAT SDO Levelshift / predriver SDS SW10 SPI FAIL TST TST1 GND EP Sig GND PWR GND Figure 1. Block Diagram and Application Diagram NOTE: Unused switches to be shorted externally. The switches should be grounded If a full section is not used. Table 1. EXTERNAL COMPONENTS Comp Function Min. Value Typ. Value Max. Value Units C1 Cap. for VDD regulator 300 470 1000 nF Cap. for VDD ESR 200 m C2 Cap. for switch control 150 220 nF C3 VBB decoupling cap. 100 nF C4 VLED decoupling cap. 10 nF www.onsemi.com 2