Texas Instruments LP2951EVM Скачать руководство пользователя страница 14

FCC Interference Statement for Class B EVM devices

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of
the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which
can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more
of the following measures:

Reorient or relocate the receiving antenna.

Increase the separation between the equipment and receiver.

Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.

Consult the dealer or an experienced radio/TV technician for help.

3.2

Canada

3.2.1

For EVMs issued with an Industry Canada Certificate of Conformance to RSS-210 or RSS-247

Concerning EVMs Including Radio Transmitters:

This device complies with Industry Canada license-exempt RSSs. Operation is subject to the following two conditions:

(1) this device may not cause interference, and (2) this device must accept any interference, including interference that may
cause undesired operation of the device.

Concernant les EVMs avec appareils radio:

Le présent appareil est conforme aux CNR d'Industrie Canada applicables aux appareils radio exempts de licence. L'exploitation
est autorisée aux deux conditions suivantes: (1) l'appareil ne doit pas produire de brouillage, et (2) l'utilisateur de l'appareil doit
accepter tout brouillage radioélectrique subi, même si le brouillage est susceptible d'en compromettre le fonctionnement.

Concerning EVMs Including Detachable Antennas:

Under Industry Canada regulations, this radio transmitter may only operate using an antenna of a type and maximum (or lesser)
gain approved for the transmitter by Industry Canada. To reduce potential radio interference to other users, the antenna type
and its gain should be so chosen that the equivalent isotropically radiated power (e.i.r.p.) is not more than that necessary for
successful communication. This radio transmitter has been approved by Industry Canada to operate with the antenna types
listed in 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 fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
l'émetteur

3.3

Japan

3.3.1

Notice for EVMs delivered in Japan:

Please see

http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page

日本国内に

輸入される評価用キット、ボードについては、次のところをご覧ください。

http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page

3.3.2

Notice for Users of EVMs Considered “Radio Frequency Products” in Japan:

EVMs entering Japan may not be certified

by TI as conforming to Technical Regulations of Radio Law of Japan.

If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required to follow the
instructions set forth by Radio Law of Japan, which includes, but is not limited to, the instructions below with respect to EVMs
(which for the avoidance of doubt are stated strictly for convenience and should be verified by User):

1.

Use EVMs in a shielded room or any other test facility as defined in the notification #173 issued by Ministry of Internal
Affairs and Communications on March 28, 2006, based on Sub-section 1.1 of Article 6 of the Ministry’s Rule for
Enforcement of Radio Law of Japan,

2.

Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to
EVMs, or

3.

Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.

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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