The UCD9244 is a four-rail synchronous buck digital PWM controller designed fornon-isolated DC/DC power applications. This device integrates dedicated circuitry for DC/DC loopmanagement with support for up to four VID interfaces. Additionally, the UCD9244 has flash memoryand a serial interface to support configurability, monitoring and management.
Several Voltage Identification (VID) modes are supported, including a 4-bit parallelinterface, a 6-bit interface and an 8-bit serial interface.
The UCD9244 was designed to provide a wide variety of desirable features for non-isolatedDC/DC converter applications while minimizing the total system component count by reducing externalcircuits. The solution integrates multi-loop management with sequencing, margining and tracking tooptimize for total system efficiency. Additionally, loop compensation and calibration are supportedwithout the need to add external components.
To facilitate configuring the device, the Texas Instruments Fusion Digital Power™Designer is provided. This PC based Graphical User Interface offers an intuitive interface to thedevice. This tool allows the design engineer to configure the system operating parameters for theapplication, store the configuration to on-chip non-volatile memory and observe both frequencydomain and time domain simulations for each of the power stage outputs.
TI has also developed multiple complementary power stage solutions – from discretedrivers in the UCD7k family to fully tested power train modules in the PTD family. These solutionshave been developed to complement the UCD92xx family of system power controllers.