Texas Instruments UCD9081 User Manual Download Page 18

EVALUATION BOARD/KIT IMPORTANT NOTICE

Texas Instruments (TI) provides the enclosed product(s) under the following conditions:

This evaluation board/kit is intended for use for

ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES

ONLY

and is not considered by TI to be a finished end-product fit for general consumer use. Persons handling the product(s) must have

electronics training and observe good engineering practice standards. As such, the goods being provided are not intended to be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including product safety and environmental
measures typically found in end products that incorporate such semiconductor components or circuit boards. This evaluation board/kit does
not fall within the scope of the European Union directives regarding electromagnetic compatibility, restricted substances (RoHS), recycling
(WEEE), FCC, CE or UL, and therefore may not meet the technical requirements of these directives or other related directives.

Should this evaluation board/kit not meet the specifications indicated in the User’s Guide, the board/kit may be returned within 30 days from
the date of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY SELLER TO BUYER
AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF
MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE.

The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user indemnifies TI from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge.

EXCEPT TO THE EXTENT OF THE INDEMNITY SET FORTH ABOVE, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.

TI currently deals with a variety of customers for products, and therefore our arrangement with the user

is not exclusive.

TI assumes

no liability for applications assistance, customer product design, software performance, or infringement of patents or

services described herein.

Please read the User’s Guide and, specifically, the Warnings and Restrictions notice in the User’s Guide prior to handling the product. This
notice contains important safety information about temperatures and voltages. For additional information on TI’s environmental and/or
safety programs, please contact the TI application engineer or visit

www.ti.com/esh

.

No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or
combination in which such TI products or services might be or are used.

FCC Warning

This evaluation board/kit is intended for use for

ENGINEERING DEVELOPMENT, DEMONSTRATION, OR EVALUATION PURPOSES

ONLY

and is not considered by TI to be a finished end-product fit for general consumer use. It generates, uses, and can radiate radio

frequency energy and has not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC rules, which are
designed to provide reasonable protection against radio frequency interference. Operation of this equipment in other environments may
cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may
be required to correct this interference.

EVM WARNINGS AND RESTRICTIONS

It is important to operate this EVM within the input voltage range of 0 V to 5 V and the output voltage range of 0 V to 3.3 V.

Exceeding the specified input range may cause unexpected operation and/or irreversible damage to the EVM. If there are questions
concerning the input range, please contact a TI field representative prior to connecting the input power.

Applying loads outside of the specified output range may result in unintended operation and/or possible permanent damage to the EVM.
Please consult the EVM User's Guide prior to connecting any load to the EVM output. If there is uncertainty as to the load specification,
please contact a TI field representative.

During normal operation, some circuit components may have case temperatures greater than 50

°

C. The EVM is designed to operate

properly with certain components above 50

°

C as long as the input and output ranges are maintained. These components include but are

not limited to linear regulators, switching transistors, pass transistors, and current sense resistors. These types of devices can be identified
using the EVM schematic located in the EVM User's Guide. When placing measurement probes near these devices during operation,
please be aware that these devices may be very warm to the touch.

Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265

Copyright © 2008, Texas Instruments Incorporated

Summary of Contents for UCD9081

Page 1: ...f Materials 16 7 Related Documentation From Texas Instruments 17 List of Figures 1 System Block Diagram 2 2 UCD9081EVM Functionality 3 3 UCD9081EVM Hookup 6 4 GUI Main Window 8 5 GUI Help Window 9 6 GUI System Configuration Window 10 7 GUI Rail Configuration Window 10 8 GUI GPO Configuration Window 12 9 GUI User Data Window 12 List of Tables 1 UCD9081 Jumpers 5 Windows is a trademark of Microsoft ...

Page 2: ...l voltage rails when configured properly UCD9081EVM can sequence and monitor external voltage source as well UCD9081EVM EVM board that houses the UCD9081 and peripheral circuits The EVM can sequence and monitor onboard as well as external voltage rails as previously explained The UCD9081EVM allows evaluation of the UCD9081 Power Supply Sequencer and Monitor with Error Logging The UCD9081 is a high...

Page 3: ...er for connection to a PC LEDs for board power and power supply enables for quick visible indication of power supply status The eight power supplies provided on the UCD9081EVM are a combination of low dropout regulators LDO power converter integrated circuits IC and power converter modules all from Texas Instruments TI Rails 1 6 have a TI TPS76901 LDO for generating voltages from 1 4 V to 2 4 V Ra...

Page 4: ...ing interface to an external system rather than to the eight supplies provided on the EVM Each of the eight power supply rails supported by the UCD9081 has an enable and a monitoring pin accessible at J4 Through the use of jumpers for the monitor pins the user can choose to monitor either the external rails or the internal EVM rails CAUTION Ensure that if you are configuring the UCD9081EVM to moni...

Page 5: ...ontrol if the signals are pulled up to 3 3 V ground for all zero or down to ground Connect to pins 1 2 for 3 3 V and connect to pins 2 3 for ground JP21 JP28 Undervoltage fault For each rail you can generate an undervoltage fault by removing this Jumper on pins 1 2 for jumper Removal of these jumpers removes input from the power supplies causing the no undervoltage fault output voltage being monit...

Page 6: ...minates You then observe D1 and D5 D11 illuminate indicating that the UCD9081 is operating 2 Next connect the USB interface adapter to the UCD9081EVM J3 connector using the ribbon cable provided Plug the appropriate end of the USB cable into the adapter and the other end into your PC GUI installation and operating instructions appear in Section 3 1 Note For some configurations of the UCD9081 devic...

Page 7: ...e application No other drivers or libraries are required to run the application 1 To determine the NET Framework software version you must use the Windows Control Panel and select Add Remove Programs The Control Panel lists all the installed PC software and you can determine if the proper Microsoft NET Framework version is installed Note To update your NET Framework to version 2 0 go this URL http...

Page 8: ... I2C Write I2C Read I2C NACK Rail Status information including monitored voltage scaled to user entered divider ratios and rail error status Update Parameters and Sequence button Updates buffer stored GUI information to device user flash memory and initiates a device sequence This process takes a couple seconds and then the sequencer is able to be monitored again Sequence button causes the system ...

Page 9: ... system voltage reference and shutdown delay field entries Rail Configuration provides rail configuration field entries All Rails simultaneously opens all rail forms for comparison setup GPO Configuration provides GPO configuration field entries All general purpose outputs GPO simultaneously open all GPO windows for setup comparisons User Data provides specific user data to be uploaded to the devi...

Page 10: ...ltage is 3 1 V the GUI can use this to properly scale the displayed voltages Note When the reference is changed and stored to the GUI buffer the displayed rail voltages are incorrectly scaled until the device parameters are updated Pin Function Select helps you select the EN8 or GPO1 function The function selected disables the other function from being configured Sequence Control Checking the Igno...

Page 11: ...te that zero value divider resistor values cause the divider ratio to be evaluated as unity no scaling Store to Buffer and Close Buttons The Store to Buffer button saves the current window entries to a GUI buffer and the Close button closes the window without saving the form entries Voltage rail sequencing conditions are None rail is not sequenced Time number of milliseconds before this rail is en...

Page 12: ...Store to Buffer and Close Buttons The Store to Buffer button saves the current window entries to a GUI buffer and the Close button closes the window without saving the form entries Sequencing conditions for a GPO None GPO is not sequenced Time number of milliseconds before this GPO is enabled Parent Reg number of milliseconds to delay after the parent rail achieves regulation before enabling this ...

Page 13: ...onsidering system shutdown or unsequence time loading on the power supply rails must be taken into account The rail bleed down times are a function of the loading and the total load and power supply output capacitance As previously noted for RAIL1 RAIL6 the output voltage set point resistors have been chosen to provide a much quicker bleed down time than could be achieved with a light load For RAI...

Page 14: ...d the enable is active low then a pulldown resistor must be located on the corresponding ENx output Note that on the EVM the ENx and GPOx outputs have selectable pullup or pulldown jumpers installed Also note that for the ENx outputs the ENx status LEDs provide a stronger pullup current than the jumper pulldowns so that the power supplies become disabled during reset Device reset occurs when Power...

Page 15: ...5 EVM Schematic www ti com EVM Schematic SLVU249 September 2008 UCD9081 Power Supply Sequencer and Monitor EVM 15 Submit Documentation Feedback ...

Page 16: ...ip 0 100 inch 3 PTC36SAAN Sullins 9 JP21 JP29 Header 2 pin 100 mil spacing 36 pin strip 0 100 inch 2 PTC36SAAN Sullins 2 Q1 Q2 MOSFET Nch 50V 0 22A 3 5 Ω SOT23 BSS138 Fairchild 8 R1 R4 R6 R15 300 Resistor Chip 1 16W 5 0603 Std Std R25 R32 R37 R45 10 R13 R17 49 9 Resistor Chip 1 10W 1 0603 Std Std R18 R21 R27 R36 R39 R47 1 R16 115 Resistor Chip 1 10W 1 0603 Std Std 1 R2 1 50k Resistor Chip 1 16W 1 ...

Page 17: ...TI 29 Shunt 100 mil Black 0 1 929950 00 3M 1 PCB 5 3 In 4 2 In 0 062 Inch HPA199 Any 4 Bumpons 2566 SPC USB Interface Adapter User s Guide SLLU093 8 Channel Power Supply Sequencer and Monitor With Error Logging data sheet SLVS813 TPS76901 Ultralow Power 100 mA Low Dropout Linear Regulator data sheet SLVS203 PTH04070W 3 A 3 3 5 V Input Adjustable Switching Regulator data sheet SLTS227 PTH05050 6 A ...

Page 18: ...roduct This notice contains important safety information about temperatures and voltages For additional information on TI s environmental and or safety programs please contact the TI application engineer or visit www ti com esh No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine process or combination in which such TI products...

Page 19: ...usiness practice TI is not responsible or liable for any such statements TI products are not authorized for use in safety critical applications such as life support where a failure of the TI product would reasonably be expected to cause severe personal injury or death unless officers of the parties have executed an agreement specifically governing such use Buyers represent that they have all neces...

Page 20: ...Mouser Electronics Authorized Distributor Click to View Pricing Inventory Delivery Lifecycle Information Texas Instruments UCD9081EVM ...

Reviews: