深圳市中立信电子科技有限公司

FEATURES APPLICATIONS

2• Fully Configurable Multi-Output and Multi- • Industrial/ATE

Phase Non-Isolated DC/DC PWM Controller • Networking Equipment

• Controls Up to 4 Voltage Rails and Up to 8 • Telecommunications Equipment

Phases • Servers

• Supports Switching Frequencies Up to 2MHz • Storage Systems

with 250 ps Duty-Cycle Resolution

• FPGA, DSP and Memory Power

• Up To 1mV Closed Loop Resolution

• Hardware-Accelerated, 3-Pole/3-Zero DESCRIPTION

Compensator with Non-Linear Gain for The UCD9248 is a multi-rail, multi-phase

Improved Transient Performance synchronous buck digital PWM controller designed for

• Supports Multiple Soft-Start and Soft-Stop non-isolated DC/DC power applications. This device

Configurations Including Prebias Start-up integrates dedicated circuitry for DC/DC loop

management with flash memory and a serial interface

• Supports Voltage Tracking, Margining and to support configurability, monitoring and Sequencing management.

• Supports Current and Temperature Balancing

The UCD9248 was designed to provide a wide for Multi-Phase Power Stages variety of desirable features for non-isolated DC/DC

• Supports Phase Adding/Shedding for Multi- converter applications while minimizing the total

Phase Power Stages system component count by reducing external

• Sync In/Out Pins Align DPWM Clocks Between circuits. The solution integrates multi-loop

Multiple UCD92xx Devices management with sequencing, margining, tracking

and intelligent phase management to optimize for

• 12-Bit Digital Monitoring of Power Supply total system efficiency. Additionally, loop Parameters Including: compensation and calibration are supported without

– Input/Output Current and Voltage the need to add external components.

– Temperature at Each Power Stage To facilitate configuring the device, the Texas

• Multiple Levels of Over-current Fault Instruments Fusion Digital Power™ Designer is

Protection: provided. This PC based Graphical User Interface

offers an intuitive interface to the device. This tool

– External Current Fault Inputs allows the design engineer to configure the system

– Analog Comparators Monitor Current operating parameters for the application, store the

Sense Voltage configuration to on-chip non-volatile memory and

– Current Continually Digitally Monitored observe both frequency domain and time domain

simulations for each of the power stage outputs. • Over- and Under-voltage Fault Protection

TI has also developed multiple complementary power • Over-temperature Fault Protection

stage solutions – from discrete drivers in the UCD7k

• Enhanced Nonvolatile Memory with Error family to fully tested power train modules in the PTD Correction Code (ECC) family. These solutions have been developed to

• Device Operates From a Single Supply with an complement the UCD9k family of system power

Internal Regulator Controller That Allows controllers.

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