STR-NCV7685-REAR-GEVK User Manual Automotive http://onsemi.
STR-NCV7685-REAR-GEVK Table of Contents WARNINGS .................................................................................................................................................................................. 3 DESCRIPTION .............................................................................................................................................................................. 4 FEATURES ...................................................................................
STR-NCV7685-REAR-GEVK Warnings Individual LED current can be changed in this system, however continuous operation of multiple LEDs with large current setting makes heat sink, PCB and devices extremely hot. Please operate under appropriate environmental conditions. LED board mounts 72 of high-efficient type power LEDs and there are very bright, even if LED current is small. Please avoid staring into the LED source without light guide. http://onsemi.
STR-NCV7685-REAR-GEVK Description STR-NCV7685-REAR-GEVK is an evaluation board for car taillights application with BLE function in automotive which driven by NCV7685 and controlled by RSL10. This kit focuses multi-chips design to complete sophisticated patterns and animations. Seventy-two LED nodes which are driven by six NCV7685 chips to implement both pre-defined animations with configurable parameters and customized pattern by controlling each single LED node.
STR-NCV7685-REAR-GEVK Hardware Design Architecture of the Kit The kit is divided into three parts on the hardware: LED board, LED driver and control board and RSL10 Linked board. So, Control board and Linked board can be re-used in other lighting applications. Figure 1: Architecture of the Rear Lighting Kit LED board Here are 72 high-efficient power LEDs, 20 in yellow and 52 in red, to show specific pattern or amination.
STR-NCV7685-REAR-GEVK Figure 3: Top of the LED Driver and Control Board Figure 4: Bottom of the LED Driver and Control Board Function of key Parts Below table lists the function of key part in the LED driver and control board. Table 1.
STR-NCV7685-REAR-GEVK NCP1406 Boost Converter PCA9655 Remote 16-bit I/O Expander for I2C Bus with Interrupt RSL10 Linked board Interface to Strata system. Find more details in Onsemi webpage. If the re-fresh rate of the LED board is acceptable, the control function of LED driver board can be shift to RSL10 linked board to save cost. In this kit, ADC functions for LED voltage and current sampling were shifted from control board. Figure 5: Strata Linked Board Board Assembling 1.
STR-NCV7685-REAR-GEVK 2. As high-efficient type power LEDs are very bright, assemble light guide before power on the kit. Keep the height of gap is greater than 3 centimeters at least. Figure 7: Assembling the Light Guide Strata GUI Setup Procedure of Strata GUI 1. Go to www.onsemi.com/strata to download the latest version of Strata and follow the installation prompts. 2. Launch and login to Strata with your registered account or guest. Figure 8: Strata System Login 3.
STR-NCV7685-REAR-GEVK Getting Help information of NCV7685 Rear Lighting Kit Just click icon on top-right corner to show quick help in each panel. Each part’s function will be detailed one by one. Here is an example: The “Right Turn” button is highlighted, the others keep fading out, the popup window shows the function and usage or parameters for “Right Turn” animation.
STR-NCV7685-REAR-GEVK Here is a brief for pre-defined animations. “Welcome" and “Goodbye” animation: It demoes as "Leaving Home" or “Going Home” in the automotive lighting. “Left Turn " and “Right Turn” animation: It shows left or right turn signal function. Period and Cycle can be easily changed by drag the slider. “Brake": It shows brake light function in the car. Intensity (PWM duty) can be changed by drag the slider. “Warning": It shows hazard lights animation. “Fading”: It shows breathing animation.
STR-NCV7685-REAR-GEVK Figure 13: Customized Test Panel BLE Mobile Apps Access The NCV7685 Rear-Lighting Evaluation Kit also can access by general mobile Apps. E.g. LightBlue, BleScanner… Here is an example using “Light Blue” App to control the kit: 1. 2. 3. 4. Open LightBlue in the mobile. Find and choose Peripheral of “Strata_NVC7685”. Tap “BLE_TX_VALUE” character. Set command and parameter and send out data following the below protocol. http://onsemi.
STR-NCV7685-REAR-GEVK Figure 13: Using Light Blue App The protocol between NCV7685 rear lighting kit with mobile app is very simple. Find the detail in the below table. For better security and reliability, users had better to work out the private protocols according to their application. Table 2.
STR-NCV7685-REAR-GEVK Design Discussion Floating Address for NCV7685 In general, the user is preferring to use fixed address in multiple NCV7685 application. It leads to add one more procedure to pre-programming each chips’ address in mass production stage. In addition, it is inconvenient for maintenance in the aftermarket.
Schematic Strata_NCV7685 Page http://onsemi.
STR-NCV7685-REAR-GEVK Power Page http://onsemi.
STR-NCV7685-REAR-GEVK LED_Driver Page http://onsemi.
STR-NCV7685-REAR-GEVK Controller Peripheral Page http://onsemi.
STR-NCV7685-REAR-GEVK To_Linked_Board Page http://onsemi.
STR-NCV7685-REAR-GEVK LED_Board_Left_Part Page http://onsemi.
STR-NCV7685-REAR-GEVK LED_Board_Right_Part Page http://onsemi.
STR-NCV7685-REAR-GEVK Top Overlayer of LED Board http://onsemi.
STR-NCV7685-REAR-GEVK Top Overlayer of Control Board http://onsemi.
BOM http://onsemi.
STR-NCV7685-REAR-GEVK onsemi and the onsemi logo are trademarks of Semiconductor Components Industries, LLC dba onsemi or its subsidiaries in the United States and/or other countries. onsemi owns the rights to a number of patents, trademarks, copyrights, trade secrets, and other intellectual property. A listing of onsemi’s product/patent coverage may be accessed at https://www.onsemi.com/site/pdf/Patent-Marking.pdf. onsemi reserves the right to make changes without further notice to any products herein.
