DLPA2005 datasheet(36/60 Pages) TI

36 / 60 page

A 405nm LED typically supplies the illumination for the DMD. In addition to LEDs, other light sources are

supported.

For connecting the DLPC1438 controller to the host processing for receiving patterns or video data, the parallel

interface is used. Connect an I2C interface to the host processor to send commands to the DLPC1438 controller.

8.2.1.2 Detailed Design Procedure

For connecting the DLP300S/DLP301S DMD, the DLPC1438 controller and the DLPA200x or DLPA300x

PMIC/LED driver see the reference design schematic. Follow the layout guidelines shown in Section 10 to

achieve reliable DLP system results.

8.2.1.3 Application Curve

As the LED currents that are driven through LED_0, LED_1 or LED_2 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 8-2. For the LED currents shown, it is assumed that the same

current amplitude is applied to the LED_0, LED_1 or LED_2 LEDs.

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

Figure 8-2. Luminance vs Current

DLPC1438

DLPS216A – JULY 2021 – REVISED AUGUST 2021

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DLPA2005 Datasheet(PDF) 36 Page - Texas Instruments