Dallas—TI's single- and dual-phase UCD9111 and UCD9112 controllers, in the Fusion Digital Power family, are the company's first digital power offerings for point-of-load systems. Complementing these GUI-configurable controllers is a new driver, the UCD7230, and the company's UCD9080 is an eight-rail power manager for power supply sequencing and monitoring.
Digital POL Management—No Programming Required
The single-phase UCD9111 and dual-phase UCD9112 are fully configurable via a graphical user interface (GUI) for monitoring, control and management for point-of-load power conversion—eliminating designers' need to write a single line of software. The GUI configuration allows control over the power supply's voltage and current thresholds, as well as its soft-start, margining, and loop compensation characteristics.
The UCD9111 and UCD9112 incorporate a control law accelerator peripheral, which performs full-digital loop control while supporting switching frequencies of up to 2 MHz. The controllers' architecture is optimized to deliver high power performance with extended functionality. This includes differential voltage feedback for common-mode rejection and 175 ps PWM resolution to support wide input-to-output voltage ratios at high switching frequencies without limiting the output resolution.
Additionally, the UCD9111 and UCD9112 support up to 80 PMBusTM interface commands for control, configuration and management of the power supply. Quiescent current is just 7 mA during normal operation.
Digital Power Driver for POL Systems
The UCD7230 2-MHz synchronous buck driver, which includes high and low side 4-amp drivers and an integrated 3.3-volt linear regulator, supports the UCD9111 and UCD9112. The UCD7230 incorporates cycle-by-cycle current limit and a low-offset current-sense amplifier to provide average inductor-current information to the controller. In a dual-phase configuration, the current measurement enables the driver to perform current-balancing of the two phases to achieve higher efficiency and increased system reliability.
Datasheets for these products will be available shortly.
Samples of TI's UCD9111 and UCD9112 digital power controllers will be available in a 32-pin QFN package in 4Q, 2006. Suggested resale pricing for the devices in quantities of 1,000 units is $2.95 each for the UCD9111 and $3.35 each for the UCD9112. The UCD7230 is sampling in a 20-pin QFN package with a suggested resale price of 80 cents each. The UCD9080 is sampling in a 32-pin QFN package and has a suggested resale price of $2.95 each. Volume production for the four products is expected in 1Q, 2007.
Texas Instruments, 1-800-477-8924, www.ti.com