UCD9240PFC

数字PWM系统控制器 Digital PWM System Controller

DESCRIPON

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