Texas Instruments TPS650231EVM User Manual Download Page 14

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements,
and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should
obtain the latest relevant information before placing orders and should verify that such information is current and complete. All products are
sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment.

TI warrants performance of its hardware products to the specifications applicable at the time of sale in accordance with TI’s standard
warranty. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where
mandated by government requirements, testing of all parameters of each product is not necessarily performed.

TI assumes no liability for applications assistance or customer product design. Customers are responsible for their products and
applications using TI components. To minimize the risks associated with customer products and applications, customers should provide
adequate design and operating safeguards.

TI does not warrant or represent that any license, either express or implied, is granted under any TI patent right, copyright, mask work right,
or other TI intellectual property right relating to any combination, machine, or process in which TI products or services are used. Information
published by TI regarding third-party products or services does not constitute a license from TI to use such products or services or a
warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual
property of the third party, or a license from TI under the patents or other intellectual property of TI.

Reproduction of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied
by all associated warranties, conditions, limitations, and notices. Reproduction of this information with alteration is an unfair and deceptive
business practice. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional
restrictions.

Resale of TI products or services with statements different from or beyond the parameters stated by TI for that product or service voids all
express and any implied warranties for the associated TI product or service and is an unfair and deceptive business 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 necessary expertise in the safety and regulatory ramifications of their applications, and
acknowledge and agree that they are solely responsible for all legal, regulatory and safety-related requirements concerning their products
and any use of TI products in such safety-critical applications, notwithstanding any applications-related information or support that may be
provided by TI. Further, Buyers must fully indemnify TI and its representatives against any damages arising out of the use of TI products in
such safety-critical applications.

TI products are neither designed nor intended for use in military/aerospace applications or environments unless the TI products are
specifically designated by TI as military-grade or "enhanced plastic." Only products designated by TI as military-grade meet military
specifications. Buyers acknowledge and agree that any such use of TI products which TI has not designated as military-grade is solely at
the Buyer's risk, and that they are solely responsible for compliance with all legal and regulatory requirements in connection with such use.

TI products are neither designed nor intended for use in automotive applications or environments unless the specific TI products are
designated by TI as compliant with ISO/TS 16949 requirements. Buyers acknowledge and agree that, if they use any non-designated
products in automotive applications, TI will not be responsible for any failure to meet such requirements.

Following are URLs where you can obtain information on other Texas Instruments products and application solutions:

Products

Applications

Amplifiers

amplifier.ti.com

Audio

www.ti.com/audio

Data Converters

dataconverter.ti.com

Automotive

www.ti.com/automotive

DLP® Products

www.dlp.com

Communications and

www.ti.com/communications

Telecom

DSP

dsp.ti.com

Computers and

www.ti.com/computers

Peripherals

Clocks and Timers

www.ti.com/clocks

Consumer Electronics

www.ti.com/consumer-apps

Interface

interface.ti.com

Energy

www.ti.com/energy

Logic

logic.ti.com

Industrial

www.ti.com/industrial

Power Mgmt

power.ti.com

Medical

www.ti.com/medical

Microcontrollers

microcontroller.ti.com

Security

www.ti.com/security

RFID

www.ti-rfid.com

Space, Avionics &

www.ti.com/space-avionics-defense

Defense

RF/IF and ZigBee® Solutions

www.ti.com/lprf

Video and Imaging

www.ti.com/video

Wireless

www.ti.com/wireless-apps

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

Copyright © 2010, Texas Instruments Incorporated

Summary of Contents for TPS650231EVM

Page 1: ...fault LDO Output Voltages TPS650231 2 4 TPS65023B TPS650231EVM 664 Bill of Materials 12 1 Introduction The Texas Instruments TPS65023B TPS650231EVM is an integrated power management integrated circuit IC for applications that are powered with one Li ion or Li polymer cell and require multiple power rails The TPS65023B TPS650231 contains three highly efficient switching step down converters two LDO...

Page 2: ...nverts it to a USB protocol and sends it to the PC 1 1 4 Software Texas Instruments provides software to assist the user in evaluating this EVM To install the software go to the Texas Instruments Web page and download the latest software version from the TPS65023B or TPS650231 product folder Once you have downloaded the software execute the setup file and follow the instructions given 1 2 Features...

Page 3: ...D Output voltage from RTC circuit J7 Fault Outputs Four fault outputs are available on this connector PWRFAIL Fault occurs when input voltage is less than 3 V Pulled up to VRTC when safe low for fail INT Fault occurs when a fail is on an input or output voltage acts as a sum fail Pulled up to VIN when safe low for fail RESPWRON Low reset signal is controlled by SW1 144 ms Pulled up to VIN normally...

Page 4: ...is ON JP6 DCDC3 ON OFF EN for DCDC3 converter default setting is ON JP7 LDO ON OFF EN for both LDO1 and LDO2 regulators default setting is ON JP8 DEFLDO1 Sets default voltage for LDO1 and LDO2 in combination with DEFLDO2 See Table 2 for TPS65023B and Table 3 for TPS650231 defaults LDO output voltages JP9 DEFLDO2 Sets default voltage for LDO1 and LDO2 in combination with DEFLDO1 See Table 2 for TPS...

Page 5: ... external voltage scaling circuit is on the EVM and the output voltage of DCDC2 can be switched between two preset voltages This useful feature reduces the power consumption of an application processor in Low Power mode The voltage scaling circuit consists of JP2 Q1 R3 R6 and R24 The circuit uses a transistor Q1 to connect a resistor R24 in parallel to the lower resistor of the feedback network R6...

Page 6: ...rations 4 1 Layout Board layout is critical for all switch mode power supplies Figure 1 through Figure 5 show the board layout for the TPS65023B TPS650231EVM 664 PCB The nodes with high switching frequencies and currents are short and are isolated from the noise sensitive feedback circuitry Careful attention has been given to the routing of high frequency current loops See the data sheet for speci...

Page 7: ...www ti com Board Layout Figure 2 Top Layer Routing 7 SLVU394 October 2010 TPS65023B TPS650231EVM Submit Documentation Feedback Copyright 2010 Texas Instruments Incorporated ...

Page 8: ...Board Layout www ti com Figure 3 Layer 2 Routing GND Plane 8 TPS65023B TPS650231EVM SLVU394 October 2010 Submit Documentation Feedback Copyright 2010 Texas Instruments Incorporated ...

Page 9: ...www ti com Board Layout Figure 4 Layer 3 Routing Vin Plane 9 SLVU394 October 2010 TPS65023B TPS650231EVM Submit Documentation Feedback Copyright 2010 Texas Instruments Incorporated ...

Page 10: ...Board Layout www ti com Figure 5 Bottom Layer Routing 10 TPS65023B TPS650231EVM SLVU394 October 2010 Submit Documentation Feedback Copyright 2010 Texas Instruments Incorporated ...

Page 11: ...rials This section provides the TPS65023B TPS650231EVM 664 schematic and bill of materials 5 1 Schematic Figure 6 TPS65023B TPS650231EVM 664 Schematic 11 SLVU394 October 2010 TPS65023B TPS650231EVM Submit Documentation Feedback Copyright 2010 Texas Instruments Incorporated ...

Page 12: ...17 R18 R21 0 1 R3 182k Resistor Chip 1 16W 1 0603 Std 0 1 R6 365k Resistor Chip 1 16W 1 0603 Std 6 6 R7 R11 R14 100k Resistor Chip 1 16W 1 0603 Std R22 1 1 R8 10 Resistor Chip 1 16W 1 0603 Std 1 1 R9 1 20M Resistor Chip 1 16W 1 0603 Std 1 1 R10 499k Resistor Chip 1 16W 1 0603 Std 2 2 R15 R16 4 75k Resistor Chip 1 16W 1 0603 Std 2 2 R19 R20 0 Resistor Chip 1 16W 5 0603 Std 1 0 U1 TPS65023BRSB IC Po...

Page 13: ...uct 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...

Page 14: ...ch 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 necessary expertise in the safety and regulatory ramifications o...

Reviews: