DLPA2000 datasheet(28/58 Pages) TI1

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POWERDOWN

OFF

STANDBY

ACTIVE 1

ACTIVE 2

VLED_EN = 0

Valid power source connected

VRST = OFF

VBIAS = OFF

VOFS = OFF

VLED = OFF

SPI interface disabled

PWR_EN = low

RESETZ = low

All registers set to default values

DMD_EN = 0

|| FAULT = 1

PROJ_ON = low

PROJ_ON = high

DMD_EN = 1

FAULT = 0

VLED_EN = 1

VRST = OFF

VBIAS = OFF

VOFS = OFF

VLED = OFF

SPI interface enabled

PWR_EN = high

RESETZ = high (but is low if entered

state due to UVLO detection)

VRST = ON

VBIAS = ON

VOFS = ON

VLED = OFF

SPI interface enabled

PWR_EN = high

RESETZ = high

VRST = ON

VBIAS = ON

VOFS = ON

VLED = ON

SPI interface enabled

PWR_EN = high

RESETZ = high

DLPA2000

DLPS043A – JUNE 2014 – REVISED AUGUST 2015

www.ti.com

|| = OR , & = AND

FAULT = Undervoltage on any supply (except LS_OUT), thermal shutdown, or UVLO detection

UVLO detection, per the diagram, causes the DLPA2000 to go into the standby state. This is not the lowest power

state. If lower power is desired, PROJ_ON should be set low.

DMD_EN register bit can be reset or set by SPI writes. DMD_EN defaults to 0 when PROJ_ON goes from low to high

and then the DPP ASIC software automatically sets it to 1. Also, FAULT = 1 causes the DMD_EN register bit to be

reset.

PWR_EN is a signal internal to the PAD200x. This signal turns on the VCORE regulator and the load switch that

drives pin LS_OUT

Figure 14. State Diagram

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