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UCD9112_16

更新时间： 2024-10-16 02:58:51
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德州仪器 - TI /
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27页 886K
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Digital Dual-Phase Synchronous Buck Controller

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UCD9112_16 数据手册

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Not Recommended for New Designs  
UCD9112  
www.ti.com  
SLVS711A –SEPTEMBER 2006–REVISED JUNE 2007  
Digital Dual-Phase Synchronous Buck Controller  
Check for Samples: UCD9112  
1
FEATURES  
APPLICATIONS  
•
•
•
•
•
•
DC Power Distributed Systems  
Industrial / ATE  
Networking Equipment  
Servers  
Storage Systems  
2
•
Digital Dual-Phase Synchronous Buck PWM  
Controller With 175ps PWM Resolution  
•
Digital Control With Programmable  
Compensation  
•
•
•
Dual-Phase With Current Balancing Capability  
VOUT from 0.4V to 4.0V  
Telecommunications Equipment  
Programmable Switching Frequency,  
Capable of up to 1MHz  
QFN PACKAGE  
(TOP VIEW)  
•
•
•
•
•
•
•
•
•
•
Programmable Soft Start and Soft Stop  
Supports Pre-Biased Start-Up  
Supports Voltage Tracking  
Supports Remote Differential Voltage Sensing  
Supports Fan Speed Adjustment and Monitor  
Single 3.3V Bias Supply  
ADDR1  
ADDR0  
1
2
3
4
5
6
7
8
24 CLF2  
23 CLF1  
Internal and External Thermal Sensor  
Fault Logging  
22 ALERT  
21 PGOOD  
20 DPWMA1  
19 SRE1  
IOUT_1  
VIN  
UCD9112  
Graphical User Interface Configuration  
PMBus Support  
VOUT  
IOUT_2  
TEMP  
TRACK  
–
–
–
Query Voltage, Current, Faults, etc.  
Voltage Setting and Calibration  
Protection Threshold Adjustment  
18 DPWMA2  
17 SRE2  
•
32-Pin QFN Package  
DESCRIPTION/ORDERING INFORMATION  
The UCD9112 is a dual-phase synchronous buck digital PWM controller designed for point of load power  
applications. This device integrates dedicated circuitry for DC/DC loop management with a microcontroller core,  
flash memory and a PMBus™ interface to support configurability, monitoring and management of a point of load.  
The UCD9112 is capable of operating at switching frequencies of up to 1MHz.  
The UCD9112 evaluation module comes with the Fusion Digital Power Designer graphical user interface (GUI).  
This GUI allows the designer to configure the operating parameters and loop response of the power supply  
controller. This configuration can then be stored to the devices on chip non-volatile memory. This will enable a  
synchronous buck hardware design to be dynamically calibrated and reconfigured to optimize a single hardware  
design for a variety of applications.  
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.  
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
All trademarks are the property of their respective owners.  
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.  
Copyright © 2006–2007, Texas Instruments Incorporated  
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