DLPA4000 - DLP® PMIC/LED Driver

The DLPA4000 device is a highly-integrated power management driver. It is optimized forDLP^® LED projector systems. TheDLPA4000 supports projectors up to 32 A per LED with high-side pump functionality. An integrated,high-efficiency buck controller energizes the device. The drivers control switches support thesequencing of R, G, and B LEDs. The device contains five buck converters, two of which arededicated for the DLPC4422 controller low-voltage supply. Another dedicated regulated supplyenergizes the DLPA200 DMD micromirror driver and the three timing critical DC supplies for the DMD:VBIAS, VRST, and VOFS.

The DLPA4000 device contains several auxiliary blocks. These blocks allow flexibility inLED projector system design. An 8-bit programmable buck converter can drive an RGB projector fan ormake an auxiliary supply line. Two LDOs can generate a lower-current supply, up to 200 mA. TheseLDOs are specified to operate at 2.5 V and 3.3 V.

The serial protocol interface (SPI) addresses all blocks of the DLPA4000 device. Theseaddressable features include: the generation of the system reset, power sequencing, input signalsfor sequentially selecting the active LED, IC self-protections, and an analog MUX for routinganalog information to an external ADC.

• High-Efficiency, High-Current RGB LED Driver with High-Side Pump Functionality
• Drivers for External Buck FETs up to 32 A
• Drivers for External RGB Switches
• 10-Bit Programmable Current per Channel
• Inputs for Selecting Color-Sequential RGB LEDs
• Generation of DMD High Voltage Supplies
• Two High Efficiency Buck Converters to Generate the DLPC4422 controller and DMD Supply
• A High Efficiency, 8-Bit Programmable Buck Converter (PWR6) for FAN Driver Application or General Purpose
• Two LDOs Supplying Auxiliary Voltages
• Analog MUX for Measuring Internal and External Nodes
• Protections: Thermal Shutdown, Hot Die, Low Battery, and Undervoltage Lockout (UVLO)

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