DLP2010LCFQJ datasheet(30/43 Pages) TI1

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DLP2010LC

DLPS180 – MAY 2020

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8.2.1 Design Requirements

In addition to the three DLP devices in the chipset, other IC components may be needed. At a minimum, this

design requires a flash device to store the software and firmware to control the DLPC3470 .

Red, green, and blue LEDs typically supply the illumination light that is applied to the DMD. These LEDs are

often contained in three separate packages, but sometimes more than one color of LED die may be in the same

package to reduce the overall size of the pico-projector.

A parallel interface connects the DLPC3470 to the host processing for receiving images. When the parallel

interface is used, use an I2C interface to the host processor for sending commands to the DLPC3470.

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

projector in case of DLPA200x. The DLPA3000 supplies the 1.8V without external regulator.

8.2.2 Detailed Design Procedure

For connecting together the DLPC3470 , the DLPA200x/DLPA3000, and the DMD, see the reference design

schematic. When a circuit board layout is created from this schematic a very small circuit board is possible. An

example small board layout is included in the reference design data base. Layout guidelines should be followed

to achieve a reliable projector.

The optical engine that has the LED packages and the DMD mounted to it is typically supplied by an optical

OEM who specializes in designing optics for DLP projectors.

A miniature stepper motor can optionally be added to the optical engine for creating a motorized focus. Direct

control and driving of the motor can be done by the DLPA200x/DLPA3000, and software commands sent over

I2C to the DLPC3470 are available to move the motor to the desired position.

8.2.3 Application Curve

This device drives current time-sequentially though the LEDs. As the LED currents through the red, green, and

blue LEDs increases, the brightness of the projector increases. This increase is somewhat non-linear, and the

curve for typical white screen lumens changes with LED currents as shown in Figure 22. For the LED currents

shown, assumed that the same current amplitude is applied to the red, green, and blue.

SPACE

ILED(red) = ILED(green) = ILED(blue)

Figure 22. Luminance vs Current

DLP2010LCFQJ Datasheet(PDF) 30 Page - Texas Instruments

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