UCD9244
www.ti.com
SLVSAL6A –NOVEMBER 2010–REVISED FEBRUARY 2011
Digital PWM System Controller with 4-bit, 6-bit, or 8-bit VID Support
Check for Samples: UCD9244
1
FEATURES
APPLICATIONS
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Networking Equipment
Telecommunications Equipment
FPGA, DSP, and Memory Power
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Fully Configurable Four-Output Non-Isolated
DC/DC PWM Controller with support for
TMS320C6670™ and TMS320C6678™ DSP VID
interface
DESCRIPTION
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Supports Switching Frequencies Up to 2MHz
With 250 ps Duty-Cycle Resolution
The UCD9244 is a four-rail synchronous buck digital
PWM controller designed for non-isolated DC/DC
power applications. This device integrates dedicated
circuitry for DC/DC loop management with support for
up to four VID interfaces. Additionally, the UCD9244
has flash memory and a serial interface to support
configurability, monitoring and management.
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Up To 1mV Closed Loop Resolution
Hardware-Accelerated, 3-Pole/3-Zero
Compensator with Non-Linear Gain for
Improved Transient Performance
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Supports Multiple Soft-Start and Soft-Stop
Configurations Including Prebias Start-up
Several Voltage Identification (VID) modes are
supported, including a 4-bit parallel interface, a 6-bit
interface and an 8-bit serial interface.
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Supports Voltage Margining and Sequencing
Sync In Pin Aligns DPWM Clocks Between
Multiple UCD92xx Devices
The UCD9244 was designed to provide a wide
variety of desirable features for non-isolated DC/DC
converter applications while minimizing the total
system component count by reducing external
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12-Bit Digital Monitoring of Power Supply
Parameters Including:
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Input Current and Voltage
Output Current and Voltage
Temperature at Each Power Stage
Auxiliary ADC Inputs
circuits.
The
solution
integrates
multi-loop
management with sequencing, margining and
tracking to optimize for total system efficiency.
Additionally, loop compensation and calibration are
supported without the need to add external
components.
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Multiple Levels of Over-current Fault
Protection:
To facilitate configuring the device, the Texas
Instruments Fusion Digital Power™ Designer is
provided. This PC based Graphical User Interface
offers an intuitive interface to the device. This tool
allows the design engineer to configure the system
operating parameters for the application, store the
configuration to on-chip non-volatile memory and
observe both frequency domain and time domain
simulations for each of the power stage outputs.
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External Current Fault Inputs
Analog Comparators Monitor Current
Sense Voltage
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Current Continually Digitally Monitored
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Over and Under-voltage Fault Protection
Over-temperature Fault Protection
Enhanced Nonvolatile Memory With Error
Correction Code (ECC)
TI has also developed multiple complementary power
stage solutions – from discrete drivers in the UCD7k
family to fully tested power train modules in the PTD
family. These solutions have been developed to
complement the UCD92xx family of system power
controllers.
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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.
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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
TMS320C6670, TMS320C6678, Fusion Digital Power, Auto-ID are trademarks of Texas Instruments.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
© 2010–2011, Texas Instruments Incorporated
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