DESCRIPTION
●The UCD9240 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.
●FEATURES
●• Fully Configurable Multi-Output and Multi-Phase Non-Isolated DC/DC PWM Controller
●• Controls Up To Four Voltage Rails and Up To Eight 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 Multi-Phase Power Stages
●• Sync In /Out Pins Align DPWM Clocks Between Multiple UCD9240 Devices
●• Fan Monitoring and Control
●• 12-Bit Digital Monitoring of Power Supply Parameters Including:
●– Input Current and Voltage
●– Output Current and Voltage
●– Temperature at Each Power Stage
●• Multiple Levels of Overcurrent Fault Protection:
●– External Current Fault Inputs
●– Analog Comparators Monitor Current Sense Voltage
●– Current Continually Digitally Monitored
●• Over and Undervoltage Fault Protection
●• Overtemperature 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.
●APPLICATIONS
●• Industrial/ATE
●• Networking Equipment
●• Telecommunications Equipment
●• Servers
●• Storage Systems
●• FPGA, DSP and Memory Power
