UCD9248PFCR

The UCD9248 is a multi-rail, multi-phase synchronous buck digital PWM controller designed for non-isolated DC/DC power applications. This device integrates dedicated circuitry for DC/DC loop management with flash memory and a serial interface to support configurability, monitoring and management. The UCD9248 was designed to provide a wide variety of desirable features for non-isolated DC/DC converter applications while minimizing the total system component count by reducing external circuits. The solution integrates multi-loop management with sequencing, margining, tracking and intelligent phase management to optimize for total system efficiency. Additionally, loop compensation and calibration are supported without 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 the device. This tool allows the design engineer to configure the system operating parameters for the application, store the configuration to on-chip non-volatile memory and observe both frequency domain and time domain simulations for each of the power stage outputs.

Applications

• Industrial/ATE
• Networking Equipment
• Telecommunications Equipment
• Servers
• Storage Systems
• FPGA, DSP and Memory Power

Key features

• Fully Configurable Multi-Output and MultiPhase Non-Isolated DC/DC PWM Controller
• Controls Up to 4 Voltage Rails and Up to 8 Phases
• Supports Switching Frequencies Up to 2MHz with 250 ps Duty-Cycle Resolution
• Up To 1mV Closed Loop Resolution
• Hardware-Accelerated, 3-Pole/3-Zero Compensator with Non-Linear Gain for Improved Transient Performance
• Supports Multiple Soft-Start and Soft-Stop Configurations Including Prebias Start-up
• Supports Voltage Tracking, Margining and Sequencing
• Supports Current and Temperature Balancing for Multi-Phase Power Stages
• Supports Phase Adding/Shedding for MultiPhase Power Stages
• Sync In/Out Pins Align DPWM Clocks Between Multiple UCD92xx Devices
• 12-Bit Digital Monitoring of Power Supply Parameters Including: Input/Output Current and Voltage, Temperature at Each Power Stage
• Multiple Levels of Over-current Fault Protection: External Current Fault Inputs, Analog Comparators Monitor Current Sense Voltage, Current Continually Digitally Monitored
• Over- and Under-voltage Fault Protection
• Over-temperature Fault Protection
• Enhanced Nonvolatile Memory with Error Correction Code (ECC)
• Device Operates From a Single Supply with an Internal Regulator Controller That Allows Operation Over a Wide Supply Voltage Range
• Supported by Fusion Digital Power™ Designer, a Full Featured PC Based Design Tool to Simulate, Configure, and Monitor Power Supply Performance