Digital Signal Controllers Offer 16 Channel Point Of Load Control

TI's TMS320C2000T controller platform's now includes 18 high-performance, 32-bit controllers that combine real-time DSP performance with the peripheral integration, C-language efficiency and

ease of use of a microcontroller (MCU). F28044 and F2809 devices feature a 32-bit wide data path for superior performance and mixed 16-/32-bit instruction set for improved code density. These devices

also feature a patent-pending pulse width modulator (PWM) with 150 picosecond (ps) resolution. This unprecedented high-resolution pulse width modulation (HRPWM) technology provides 16 bits of accuracy in a 100 KHz control loop and 12 bits at 1.5 MHz.



In digital power applications, for example, higher resolution PWM results in a faster transient response with a smaller ripple amplitude. The unique accuracy of the high resolution PWM eliminates 'limit cycle'

issues, which means power supply designers are now able to use digital control in high-switching frequency supplies like those found in wireless base stations, network servers, and even digital televisions.



The TMS320F28044 (sampling announced in October 2006) is the industry's only single, programmable controller that can manage up to 16 DC/DC converter channels for multi-phase control. Each channel offers 150ps resolution and is based on patented HRPWM technology. The controller's

programmability lets designers build intelligence into power supply systems and simultaneously manage sequencing, margining, phase compensation, and transient response of multiple DC/DC converters. DSP

performance plus integrated HRPWM technology provides the full digital loop control and output accuracy necessary at switching frequencies over 1MHz.



The F28044 controller is part of TI's growing DSC and high-performance analog portfolio of digital power solutions that enable designers to implement digitally controlled power systems with high system intelligence and performance in an easy-to-use, intuitive development

environment. TI's digital power solutions are optimized for applications ranging from point-of-load to high-power AC/DC and DC/AC conversion.



At $5.00 in volume, the F28044 device provides full digital loop control and system management for only $0.32 per channel. Because one F28044 device performs all loop control, sequencing, system management and communications for up to 16 DC rails, designers save costs by

eliminating individual analog converters, standalone sequencing chips and communications MCUs previously used in complex POL applications.



The F28044 controller is part of TI's growing high-performance digital and analog portfolio of digital power solutions that enable designers to implement digitally controlled power systems with high system intelligence and performance in an easy-to-use, intuitive development environment. From

its Fusion Digital PowerT series of UCD9K and UCD7K controllers and power supply drivers, to the fully programmable TMS320F28x DSC controllers, TI's digital power solutions are optimized for applications

ranging from point-of-load to high-power AC/DC and DC/AC conversion.



The F2809 controller offers exceptional system integration, providing complete control system capabilities from signal input through the on-chip analog to digital converter (ADC), quadrature encoder pulse (QEP), and timer captures and compares through signal output with up to 16 independent PWM channels. The 12.5 megasamples per second (MSPS), 12-bit ADC boasts an effective number of bits (ENOB) of 10.9 and is valid across the full -40 to 125° C temperature range. Key communication

interfaces include multiple CAN, I2C, UART and SPI ports. The F2809 device offers 256KB of on-chip flash, 36KB and includes six 150ps resolution PWM channels. The F2809 controller is available for $13.00

(1Ku).