DLPU137 April   2024

 

  1.   1
  2.   Description
  3.   Features
  4.   Applications
  5.   5
  6. 1Evaluation Module Overview
    1. 1.1 Introduction
    2. 1.2 Kit Contents
    3. 1.3 Specifications
      1. 1.3.1 Electrical Specifications
      2. 1.3.2 Component Temperature Ratings - DLP4620SQ1EVM
      3. 1.3.3 Component Temperature Ratings - DLP4621Q1EVM
      4. 1.3.4 Input Video Specifications
      5. 1.3.5 SPI and I2C Timing
    4. 1.4 Device Information
  7. 2Hardware
    1. 2.1 DLP4620SQ1EVM Block Diagram
    2. 2.2 DLP4621Q1EVM Block Diagram
    3. 2.3 Controller PCB
    4. 2.4 RGB LED Driver PCB - DLP4620SQ1
    5. 2.5 Cables - DLP4620SQ1EVM
    6. 2.6 LED Driver PCB - DLP4621Q1EVM
    7. 2.7 Driver Requirements - DLP4621Q1EVM
    8. 2.8 Cables - DLP4621Q1EVM
    9. 2.9 Optical Engine Requirements
  8. 3Software
    1. 3.1 Software Installation
    2. 3.2 Quick Start - DLP4620SQ1EVM
      1. 3.2.1 Kit Assembly Instructions - DLP4620SQ1EVM
      2. 3.2.2 Powering-Up EVM
      3. 3.2.3 Steps to Reprogram the Onboard Flash Memory
    3. 3.3 Quick Start - DLP4621Q1EVM
      1. 3.3.1 Kit Assembly Instructions - DLP4621Q1EVM
      2. 3.3.2 Powering-Up EVM
      3. 3.3.3 Steps to Reprogram the Onboard Flash Memory
    4. 3.4 Connecting EVM to the DLPC230-Q1 Control Program via SPI
    5. 3.5 Connecting EVM to the DLPC230-Q1 Control Program via USB
  9. 4Hardware Design Files
    1. 4.1 Schematics
    2. 4.2 PCB Layouts
    3. 4.3 Bill of Materials (BOM)
  10. 5Additional Information
    1. 5.1 Trademarks

2.6 LED Driver PCB - DLP4621Q1EVM

The DLP4621Q1EVM can be used as a standalone system with just the controller and DMD boards, but can be combined with an LED driver board. The LED driver board shown in Figure 3-6 is designed for monochrome (white light) designs. The LED brightness can be controlled through PWM output from the DLPC231-Q1. Using the Automotive Control Program reference software Headlight Control tab, the PWM slider bars (PWM0, PWM1, and PWM2) control the current through each LED driver channel. Note that the PWM control can exceed the maximum current specification of some LEDs in certain LED configurations.

Note: Some current continues to flow through the LED with a PWM level of 0, and light output can still be visible. To fully remove LED current, the system must be set to standby mode.
CAUTION:
GUID-4C36832A-5C67-460B-94B5-813E05DCCD40-low.gif

The LED driver can reach temperatures above 55°C without proper cooling and airflow. Contact can cause burns!
CAUTION:
GUID-447D558F-F3F7-46E9-9A94-BB10A0A76CD4-low.gif

LED drivers (J7, J8, J9) can produce high currents up to 8A. Do not remove these headers, and do not touch the contact points during operation!
GUID-091CD735-152A-4A91-BDDD-894E129A57D4-low.jpg Figure 2-6 LED Driver PCB - DLP4621Q1EVM

The LED driver PCB contains the ports listed in Table 3-7.

Table 2-7 LED Driver PCB Ports
SCHEMATIC REFERENCE FUNCTION
J1 Controller power
J2 Input power
J3 Fan
J4 Fan
J5 Headlight driver interface
J6 Fan
J7 LED0 - High current output up to 8A, locking connector
J8 LED1 - High current output up to 8A, locking connector
J9 LED2 - High current output up to 8A, locking connector

The LED driver PCB contains the following ports and switches. SeeTable 3-8.

Table 2-8 LED Driver Header Pins

Schematic Reference / Signal Number

 PIN1
SW1

Fan enable

On position is down in Figure 3-6