UCD9224

www.ti.com

SLVSA35 – JANUARY 2010

Digital PWM System Controller

1

FEATURES

Tool to Simulate, Configure, and Monitor

Power Supply Performance

2

•

Fully Configurable Multi-Output and Multi-

Phase Non-Isolated DC/DC PWM Controller

APPLICATIONS

•

Controls Up to 2 Voltage Rails and Up to 4

•

Industrial/ATE

Phases

•

Networking Equipment

•

Supports Switching Frequencies Up to 2MHz

•

Telecommunications Equipment

with 250 ps Duty-Cycle Resolution

•

Servers

•

Up To 1mV Closed Loop Resolution

•

Storage Systems

•

Hardware-Accelerated, 3-Pole/3-Zero

•

FPGA, DSP and Memory Power

Compensator with Non-Linear Gain for

Improved Transient Performance

DESCRIPTION

•

Supports Multiple Soft-Start and Soft-Stop

The

UCD9224

is

a

multi-rail,

multi-phase

Configurations Including Prebias Start-up

synchronous buck digital PWM controller designed for

•

Supports Voltage Tracking, Margining and

non-isolated DC/DC power applications. This device

Sequencing

integrates

dedicated

circuitry

for

DC/DC

loop

•

Supports Current and Temperature Balancing

management with flash memory and a serial interface

for Multi-Phase Power Stages

to

support

configurability,

monitoring

and

management.

•

Supports Phase Adding/Shedding for

Multi-Phase Power Stages

The UCD9224 was designed to provide a wide

variety of desirable features for non-isolated DC/DC

•

Sync In/Out Pins Align DPWM Clocks Between

converter applications while minimizing the total

Multiple UCD92xx Devices

system

component

count

by

reducing

external

•

12-Bit Digital Monitoring of Power Supply

circuits.

The

solution

integrates

multi-loop

Parameters Including:

management with sequencing, margining, tracking

–

Input/Output Current and Voltage

and intelligent phase management to optimize for

total

system

efficiency.

Additionally,

loop

–

Temperature at Each Power Stage

compensation and calibration are supported without

•

Multiple Levels of Over-current Fault

the need to add external components.

Protection:

To

facilitate

configuring

the

device,

the

Texas

–

External Current Fault Inputs

Instruments Fusion Digital Power™ Designer is

–

Analog Comparators Monitor Current

provided. This PC based Graphical User Interface

Sense Voltage

offers an intuitive interface to the device. This tool

allows the design engineer to configure the system

–

Current Continually Digitally Monitored

operating parameters for the application, store the

•

Over- and Under-voltage Fault Protection

configuration to on-chip non-volatile memory and

•

Over-temperature Fault Protection

observe both frequency domain and time domain

•

Enhanced Nonvolatile Memory with Error

simulations for each of the power stage outputs.

Correction Code (ECC)

TI has also developed multiple complementary power

•

Device Operates From a Single Supply with an

stage solutions – from discrete drivers in the UCD7k

Internal Regulator Controller That Allows

family to fully tested power train modules in the PTD

Operation Over a Wide Supply Voltage Range

family. These solutions have been developed to

complement the UCD9k family of system power

•

Supported by Fusion Digital Power™

controllers.

Designer, a Full Featured PC Based Design

1

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2

Fusion Digital Power, Auto-ID are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Copyright © 2010, Texas Instruments Incorporated

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.