UCD9248PFCR

数字PWM系统控制器 Digital PWM System Controller

DESCRIPON

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.

FEATURES

• Fully Configurable Multi-Output and Multi Phase 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 Multi-Phase 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

APPLICATIONS

• Industrial/ATE

• Networking Equipment

• Telecommunications Equipment

• Servers

• Storage Systems

• FPGA, DSP and Memory Power