ZHCSE88A October 2015 – February 2023 DLPA3005
PRODUCTION DATA
An ultra-portable projector can be created by using a DLP chip set comprised of a 0.47 1080 DMD (DLP4710), two DLPC3439s controllers, and the DLPA3005 PMIC/LED Driver. The two DLPC3439s do the digital image processing, the DLPA3005 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 two DLPC3439s. 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 projector. Power FETs are needed external to the DLPA3005 so that high LED currents can be supported. For connecting the two DLPC3439s to the front end chip for receiving images the parallel interface is typically used. While using the parallel interface, I2C should be connected to the front end chip for inputting commands to the two DLPC3439s.
The DLPA3005 has three built-in buck switching regulators to serve as projector system power supplies. Two of the regulators are fixed to 1.1 V and 1.8 V for powering the DLP chip set. The remaining one buck regulator is available for general purpose use and its voltage is programmable. The regulator can be used to drive variable-speed fan or to power other projector chips such as the front-end chip. The only power supply needed at the DLPA3005 input is SYSPWR from an external DC power supply. The entire 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.