Texas Instruments LP2951EVM Скачать руководство пользователя страница 13

STANDARD TERMS FOR EVALUATION MODULES

1.

Delivery:

TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, and/or

documentation which may be provided together or separately (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance
with the terms set forth herein. User's acceptance of the EVM is expressly subject to the following terms.

1.1

EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility
evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not
finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For
clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions
set forth herein but rather shall be subject to the applicable terms that accompany such Software

1.2

EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned,
or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production
system.

2

Limited Warranty and Related Remedies/Disclaimers

:

2.1

These terms do not apply to Software. The warranty, if any, for Software is covered in the applicable Software License
Agreement.

2.2

TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM
to User. Notwithstanding the foregoing, TI shall not be liable for a nonconforming EVM if (a) the nonconformity was caused by
neglect, misuse or mistreatment by an entity other than TI, including improper installation or testing, or for any EVMs that have
been altered or modified in any way by an entity other than TI, (b) the nonconformity resulted from User's design, specifications
or instructions for such EVMs or improper system design, or (c) User has not paid on time. Testing and other quality control
techniques

are

used

to

the

extent

TI

deems

necessary.

TI

does

not

test

all

parameters

of

each

EVM.

User's claims against TI under this Section 2 are void if User fails to notify TI of any apparent defects in the EVMs within ten (10)
business days after delivery, or of any hidden defects with ten (10) business days after the defect has been detected.

2.3

TI's sole liability shall be at its option to repair or replace EVMs that fail to conform to the warranty set forth above, or credit
User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during the warranty
period to the address designated by TI and that are determined by TI not to conform to such warranty. If TI elects to repair or
replace such EVM, TI shall have a reasonable time to repair such EVM or provide replacements. Repaired EVMs shall be
warranted for the remainder of the original warranty period. Replaced EVMs shall be warranted for a new full ninety (90) day
warranty period.

3

Regulatory Notices:

3.1

United States

3.1.1

Notice applicable to EVMs not FCC-Approved:

FCC NOTICE:

This kit is designed to allow product developers to evaluate electronic components, circuitry, or software

associated with the kit to determine whether to incorporate such items in a finished product and software developers to write
software applications for use with the end product. This kit is not a finished product and when assembled may not be resold or
otherwise marketed unless all required FCC equipment authorizations are first obtained. Operation is subject to the condition
that this product not cause harmful interference to licensed radio stations and that this product accept harmful interference.
Unless the assembled kit is designed to operate under part 15, part 18 or part 95 of this chapter, the operator of the kit must
operate under the authority of an FCC license holder or must secure an experimental authorization under part 5 of this chapter.

3.1.2

For EVMs annotated as FCC – FEDERAL COMMUNICATIONS COMMISSION Part 15 Compliant:

CAUTION

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not
cause harmful interference, and (2) this device must accept any interference received, including interference that may cause
undesired operation.

Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to
operate the equipment.

FCC Interference Statement for Class A EVM devices

NOTE: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is
operated in a commercial environment. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instruction manual, may cause harmful interference to radio communications.
Operation of this equipment in a residential area is likely to cause harmful interference in which case the user will be required to
correct the interference at his own expense.

Содержание LP2951EVM

Страница 1: ...hematic 10 7 Bill of Materials 11 List of Figures 1 EVM With SON Package and SOIC Pads 2 2 Input Capacitors C1 C3 3 3 Output Capacitors C4 C7 3 4 Location for Bypass Capacitor C8 4 5 R1 and R2 Used to Set Fixed Voltage Mode on EVM 4 6 Resistors R3 R6 Used to Set Output Voltage in Adjustable Voltage Mode 5 7 LP2951 Adjustable Output Voltage Block Diagram 7 8 EVM With Adjustable Mode Resistors Popul...

Страница 2: ...951EVM 2 1 LP2951 Device The LP2951EVM comes populated with LP2951 50 Q1 in the SON package However this EVM can be used to evaluate the SOIC package LP2951 device as well Figure 1 shows the EVM populated with the SON package and the pads for the SOIC package on the board Table 1 shows all LP2951 part numbers and packages that are compatible with the LP2951EVM Figure 1 EVM With SON Package and SOI...

Страница 3: ...outed in series with a 1 Ω resistor R7 from the output to ground This series resistance helps stabilize the internal amplifier of the LP2951 device See the LP2951 or LP2951 N data sheet for the recommended series resistance when using a ceramic output capacitor C5 comes populated on the board and has a value of 2 2 µF C4 and C6 are pads that allow for additional output capacitors to be put on the ...

Страница 4: ...s may especially be a problem when using high value external resistors to set the output voltage To fix this problem populate C8 with a 100 pF capacitor and increase the output capacitor to at least 3 3 µF See the LP2951 and LP2951 N data sheets for more information regarding the Cbypass Figure 4 Location for Bypass Capacitor C8 2 5 Fixed Output Voltage Resistors Resistors R1 and R2 are 0 Ω resist...

Страница 5: ...so resistors R1 and R2 must first be removed Resistors R4 R6 form a voltage divider and can be populated with values based on the desired output voltage by following the equation on the EVM R3 must be populated with a 0 Ω resistor to short the Feedback pin of the device to the voltage divider of R4 R6 See Section 3 2 2 for additional information regarding setting an adjustable output voltage Figur...

Страница 6: ...ut Input for power Connect supply to this connector 3 1 2 J6 Feedback Determines the output voltage Connected to VTAP through R1 with standard setup 3 1 3 J7 ERROR Error output connector This active low output determines if the output voltage is within 6 of its expected value 3 1 4 J4 J8 GND Return path connectors 3 1 5 J9 Output Regulated output voltage connectors 3 1 6 J10 Sense Output voltage s...

Страница 7: ...ut of 5 V 3 2 2 Adjustable Output Voltage Mode To enable the adjustable voltage mode the resistors R1 and R2 must be removed Resistors R4 R6 must be populated with specific values based on the desired output voltage while R3 is populated with a 0 Ω resistor The complete equation for the output voltage is where VREF is the nominal 1 235 V reference voltage and IFB is the Feedback pin bias current n...

Страница 8: ...put voltage as necessary for test purposes 4 Thermal Guidelines and Layout Recommendations Thermal management is a key component in the design of any power converter and is especially important when the power dissipation in the LDO is high Use Equation 2 to approximate the maximum power dissipation for the particular ambient temperature where Where T J is the junction temperature TA is the ambient...

Страница 9: ...ww ti com Board Layout 9 SLVUAS6A March 2017 Revised January 2018 Submit Documentation Feedback Copyright 2017 2018 Texas Instruments Incorporated LP2951EVM 5 Board Layout Figure 9 LP2951EVM Board Layout ...

Страница 10: ...CK 0 1 80 k 39 0 k R5 R6 47 F 2 2 F 2 2 F 2 2 F 1 0 R7 C6 C5 C4 C7 1 2 1 2 1 2 J9 1 2 J8 1 2 J10 SENSE 1 2 J11 3 INPUT SHUTDOWN 1 2 FEEDBACK J6 1 2 ERROR OUTPUT 2 3 4 5 1 2 3 4 5 1 J1 J2 J3 J12 SENSE J13 SHUTDOWN J14 INPUT SHUTDOWN OUTPUT SENSE VTAP ERROR FEEDBACK SHUTDOWN R3 Copyright 2017 Texas Instruments Incorporated EVM Schematic www ti com 10 SLVUAS6A March 2017 Revised January 2018 Submit D...

Страница 11: ...o 125 degC 8 Pin SON DRG Green RoHS no Sb Br DRG0008A LP2951 50QDRGRQ1 Texas Instruments C1 0 1 µF CAP CERM 1 µF 50 V 10 X7R 1206 1206 C3216X7R1H105K TDK C3 0 1 µF CAP CERM 1 µF 35 V 10 X7R 0603 0603 C1608X7R1V105K0 80AC TDK C4 0 2 2 µF CAP CERM 2 2 µF 35 V 10 X5R 0603 0603 GRM188R6YA225K A12D MuRata C6 0 2 2 µF CAP CERM 2 2 µF 50 V 10 X7R 1206 1206 GRM31CR71H225K A88L MuRata C7 0 47 µF CAP AL 47 ...

Страница 12: ...ck Copyright 2017 2018 Texas Instruments Incorporated Revision History Revision History NOTE Page numbers for previous revisions may differ from page numbers in the current version Changes from Original March 2017 to A Revision Page Changed C7 value from 4 7 µF to 47 µF in Bill of Materials table 11 ...

Страница 13: ...y set forth above or credit User s account for such EVM TI s liability under this warranty shall be limited to EVMs that are returned during the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warr...

Страница 14: ...the user guide with the maximum permissible gain and required antenna impedance for each antenna type indicated Antenna types not included in this list having a gain greater than the maximum gain indicated for that type are strictly prohibited for use with this device Concernant les EVMs avec antennes détachables Conformément à la réglementation d Industrie Canada le présent émetteur radio peut fo...

Страница 15: ...ed loads Any loads applied outside of the specified output range may also result in unintended and or inaccurate operation and or possible permanent damage to the EVM and or interface electronics Please consult the EVM user 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 even ...

Страница 16: ...COST OF REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN TWELVE 12 MONTHS AFTER THE EVENT THAT GAVE RISE TO THE CAUSE OF ACTION HAS OCCURRED 8 2 Specif...

Страница 17: ... TI Resource NO OTHER LICENSE EXPRESS OR IMPLIED BY ESTOPPEL OR OTHERWISE TO ANY OTHER TI INTELLECTUAL PROPERTY RIGHT AND NO LICENSE TO ANY TECHNOLOGY OR INTELLECTUAL PROPERTY RIGHT OF TI OR ANY THIRD PARTY IS GRANTED HEREIN including but not limited to any patent right copyright mask work right or other intellectual property right relating to any combination machine or process in which TI product...

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