JAJSFJ1 May 2018 DLPA4000
PRODUCTION DATA.
The specified input supply voltage for main supply (VIN) is between 16 V and 20 V. The typical specification is 19.5 V. When the device energizes, several internal power supplies become energized sequentially.(Figure 1). A sequential startup ensures that all the different blocks start in a certain order and prevent excessive startup currents. The main control to start the device is the control pin PROJ_ON. Once set high the basic analog circuitry is started that is needed to operate the digital and SPI interface. This circuitry is supplied by two LDO regulators that generate 2.5 V (SUP_2P5V) and 5 V (SUP_5P0V). These regulator voltages internal only. Do not load these regulator voltages externally. Make sure the output capacitance is 2.2 µF for the 2.5-V LDO (pin 91) and 4.7 µF for the 5-V LDO, (pin 92). After the LDO voltages reach the regulator levels, the digital core starts, and the Digital State Machine (DSM) controls the device.
Subsequently, the 5.5-V LDOs for various blocks start: PWR_5V5V, DRST_5P5V and ILLUM_5P5V. Then the DLPC buck converters (PWR_1 & PWR_2) start and followed by the DMD LDOs (PWR_3 & PWR_4).The device enables and is controllable by the DLPC (indicated by RESET_Z going high). At this point the general purpose buck converter (PWR_6) can start. Lastly the regulator that supplies the DMD starts. The DMD regulator generates the timing critical VOFFSET, VBIAS, and VRESET supplies.
NOTE:
Arrows indicate sequence of events automatically controlled by digital state machine. Other events are initiated under SPI control.