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Power reference design for the TMS320C6472, 12Vin digital power controllers and LDOs (1x C6472)

Posted: 12 Mar 2010     Print Version  Bookmark and Share

Keywords:power reference design  digital power controller  TMS320C6472 DSP 

This reference design is for powering one TMS320C6472 and accounts for voltage and current requirements. This design also includes enough margin on the 1.8V rail to account for typical amounts of memory (2 x 667MHz DDR SDRAM), which comes to just over 600mA.

The TMS320C6472 DSP requires a 3.3V, 1.8V, 1.2V and 1V/1.1V input. Power-up sequencing is required. In multi-voltage architectures, coordinated management of power supplies is necessary to avoid potential problems and ensure reliable performance. Power supply designers must consider the timing and voltage differences between core and I/O voltage supplies during power-up and power-down operations.

Sequencing refers to the order, timing and differential in which the two voltage rails are powered up and down. A system designed without proper sequencing may be at risk for two types of failures. The first of these represents a threat to the long-term reliability of the dual voltage device, whereas the second is more immediate with the possibility of damaging interface circuits in the processor or system devices such as memory, logic, or data converter ICs.

This design was created to help those users desiring to design a TMS320C6472 DSP into a system using a nominal input voltage of 12V, having a highly flexible power design, and the ability to dynamically monitor temperature as well as monitoring and controlling voltage and current.

View the PDF document for more information.

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