ZHCSDS2E November 2014 – February 2021 DLPC3439
PRODUCTION DATA
A Pico projector is created by using a DLP chipset comprised of a DLP4710 (.47 1080p) DMD, a 2xDLPC3439 controller and a DLPA3000/DLPA3005 PMIC/LED driver. The DLPC3439 does the digital image processing, the DLPA3000/DLPA3005 provides the needed analog functions for the projector, and the DMD is the display device for producing the projected image.
In addition to the three DLP chips in the chipset, other chips may be needed. At a minimum a flash part is needed to store the software and firmware to control the DLPC3439.
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.
For connecting the DLPC3439 to the host processing for receiving images, parallel interface is used. I2C should be connected to the host processor for sending commands to the DLPC3439.
The only power supply needed external to the DLPC3439-based chipset is an AC adapter or battery to provide the SYSPWR DC voltage. The DLPA3000 or DLPA3005 PMIC will create all of the DC supplies needed by the DLPC3439-based chipset as well as those needed by all other electronics in the projector.
The entire pico-projector can be turned on and off by using a single signal called PROJ_ON. When PROJ_ON is high, the projector turns on and begins displaying images. When PROJ_ON is set low, the projector turns off and draws just microamps of current on SYSPWR. When PROJ_ON is set low, the 1.8-V supply can continue to be left at 1.8 V and used by other non-projector sections of the product. If PROJ_ON is low, the DLPA3000/DLPA3005 will not draw current on the 1.8-V supply.