PMIC/LED driver for DLPC8xxx controllers with >6-A LED capability

The DLPA3085 is a highly integrated

power management IC optimized for DLP

Pico™ Projector systems. The

DLPA3085 supports LED projectors up to 16A per LED and up to 32A for series LEDs,

enabled by an integrated high efficiency buck controller. Additionally, the drivers

control the RGB switches, supporting the sequencing of R, G, and B LEDs. The

DLPA3085 contains five buck converters, two of which are dedicated for DLPC low

voltage supplies. Another dedicated regulating supply generates the three

timing-critical DC supplies for the DMD: VBIAS, VRST, and VOFS.

The DLPA3085 contains several

auxiliary blocks which can be used in a flexible way. This enables a tailor-made

Pico Projector system. One 8-bit programmable buck converter can be used, for

instance, to drive an RGB projector FAN or to make auxiliary supply line. General

purpose buck2 (PWR6) is currently supported. Two LDOs can be used for a

lower-current supply, up to 200mA. These LDOs are predefined to 2.5V and 3.3V.

Through the SPI, all blocks of the

DLPA3085 can be addressed. Features included are the generation of the system reset,

power sequencing, input signals for sequentially selecting the active LED, IC

self-protections, and an analog MUX for routing analog information to an external

ADC.