DLPC3470 datasheet(51/70 Pages) TI1

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DLPC3470

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DLPS110 – APRIL 2018

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Typical Application (continued)

9.2.1.1 Design Requirements

high

accuracy

depth

capture

product

created

using

DLP

chipset

comprised

DLP2010/DLP2010NIR DMD, DLPC3470 controller and DLPA2000 PMIC/LED drive. The DLPC3470 simplifies

the pattern generation, the DLPA2000 provides the needed analog functions and DMD displays the required

patterns for accurate 3D depth capture.

In addition to the three DLP devices in the chipset, other components may be required to complete the

application. Minimally, a flash component is required to store patterns, the software, and the firmware in order to

control the DLPC3470 controller.

DLPC3470 controller supports any illumination source including IR light source (LEDs or VCSEL), UV light

source or visible light source (Red, Green or Blue LEDs or lasers).

For connecting the DLPC3470 controller to the host processing for receiving patterns or video data parallel

interface is used. Connect an I2C interface to the host processor to send commands to the DLPC3470 controller.

The only power supplies needed external to the projector are the battery (SYSPWR) and a regulated 1.8-V

supply. A single signal (PROJ_ON) controls the entire DLP system power. When PROJ_ON is high, the DLP

system turns on and when PROJ_ON is low, the DLPC3470 turns off and draws only a few microamperes of

current on SYSPWR. When PROJ_ON is low, the 1.8-V power supply can remain at 1.8 V for use by other sub

systems. When PROJ_ON is low, the DLPA2000 draws no current on the 1.8-V supply.

9.2.1.2 Detailed Design Procedure

For connecting the DLP2010 or DLP2010NIR DMD, the DLPC3470 controller and the DLPA2000 PMIC/LED

driver see the reference design schematic. An example board layout is included in the reference design data

base. Follow the layout guidelines shown in Layout to achieve reliable DLP system results.

9.2.1.3 Application Curve

9.2.2 3D Depth Sensor DLP Using Internal Pattern Streaming Mode

Figure 32 shows a typical 3D depth capture system block diagram using internal pattern streaming mode.

DLPC3470 Datasheet(PDF) 51 Page - Texas Instruments