DLPA2000 datasheet(28/41 Pages) TI1

28 / 41 page

Current (mA)

100

200

300

400

500

600

700

0.1

0.2

0.3

0.4

0.5

0.6

0.7

0.8

0.9

D001

DLP2010

DLPS046B – JULY 2014 – REVISED JULY 2016

www.ti.com

Product Folder Links: DLP2010

Submit Documentation Feedback

Typical Application (continued)

8.2.1 Design Requirements

A pico-projector is created by using a DLP chip set comprised of a DLP2010 DMD, DLPC3430 or DLPC3435

controller and DLPA2000 PMIC/LED driver. The DLPC3430 or DLPC3435 controller does the digital image

processing, the DLPA2000 provides the needed analog functions for the projector, and DMD is the display

device for producing the projected image.

In addition to the three DLP chips in the chip set, other chips may be needed. At a minimum, a flash part is

needed to store the software and firmware to control the DLPC3430 or DLPC3435.

The illumination light that is applied to the DMD is typically from red, green, and blue LEDs. These 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.

Parallel interface is used for connecting the DLPC3430 or DLPC3435 to the host processing for receiving

images. When the parallel interface is used, I2C should be connected to the host processor for sending

commands to the DLPC3430 or DLPC3435.

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

supply.

8.2.2 Detailed Design Procedure

For connecting together the DLPC3430 or DLPC3435, the DLPA2000, 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 DLPA2000, and software commands sent over I2C to the

DLPC3430 or DLPC3435 are available to move the motor to the desired position.

8.2.3 Application Curve

As the LED currents that are driven time-sequentially through the red, green, and blue LEDs are increased, the

brightness of the projector increases. This increase is somewhat non-linear, and the curve for typical white

screen lumens changes with LED currents is shown in Figure 21. For the LED currents shown, it is assumed that

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

SPACE

Figure 21. Luminance vs Current

DLPA2000 Datasheet(PDF) 28 Page - Texas Instruments

DLPA2000 Datasheet(HTML) 28 Page - Texas Instruments

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41

Datasheet Download

Link URL