UCD9112 Datasheet, PDF (1/29 Pages) Texas Instruments – DIGITAL DUAL PHASE SYNCHRONOUS BUCK CONTROLLER

UCD9112
DIGITAL DUAL PHASE SYNCHRONOUS BUCK CONTROLLER
VER. 0.5 SEPTEMBER 2006
• FEATURES
• Digital dual phase synchronous buck
PWM controller with 175ps PWM
resolution
• Digital control with programmable PID
compensation
• Dual-phase with current balancing
capability
• Vin from 4.5V to 14.5V (UCD7230)
• Vout from 1% to 99% of Vin
• Programmable switching frequency,
capable of up to 2MHz/Phase
• Programmable soft start and soft stop
• Supports pre-biased start-up
• Internally trimmed 0.5% 800mV
Reference
• Remote sensing differential amplifier
• Power supply monitoring via PMBus
• Single bias supply (3.3V VDD)
• Graphical user interface configuration
• Internal thermal sensor
• PMBus Support
■ Query Voltage, Current, Faults, etc
■ Voltage Setting and Calibration
■ Protection Threshold Adjustment
• 32-Pin QFN Package
• DESCRIPTION
The UCD9112 is dual-phase synchronous buck
digital PWM controller that supports point of load
(POL) applications. The device is configured thru
the use of a graphical user interface (GUI). The loop
compensator is configurable with the GUI to meet
dynamic converter performance allowing a single
hardware design to cover a broad range of POL
applications.
In addition to digital control loop, the UCD9112 is
able to monitor and manage power supply operating
conditions and report the status to the host system
through PMBus. The management parameters are
configurable through GUI. The GUI also allows the
power supply designer to easily configure the digital
control loop characteristics and generate the gain
and phase information for analysis using bode plots.
To ensure balanced outputs on each phase, the
UCD9112 incorporates a current balancing scheme.
The PWM output of the dual phase controller is
capable of operating at a switching frequency of up
to 2MHz with a relative phase adjustment of 180^o.
The UCD7230 synchronous buck driver has been
designed to work with the UCD9112 controller to
provide a highly integrated digital power solution. In
addition to 4A output drive capability, the driver
integrates current limit, short circuit protection as well
as under-voltage lockout protection. The UCD7230
also has a 3.3V, 10mA linear regulator that provides
the supply current for the controller.
• APPLICATIONS
•
• Networking Equipment
• Servers
• Storage Systems
• Telecommunications Equipment
• DC Power Distributed Systems
• Industrial / ATE
ORDERING INFORMATION
PACKAGE
QFN
PRODUCT PREVIEW information concerns products in the
formative or design phase of development. Characteristic data
and other specifications are design goals. Texas Instruments
reserves the right to change or discontinue these products
without notice.
TAPE AND REEL QTY
250
www.ti.com
PART NUMBER
UCD9112RHB
Copyright © 2001, Texas Instruments Incorporated
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