Texas Instruments LM3248 User Manual Download Page 17

IMPORTANT NOTICE

Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other
changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest
issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and
complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale
supplied at the time of order acknowledgment.

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

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

TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or
other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information
published by TI regarding third-party products or services does not constitute a license 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 significant portions 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. TI is not responsible or liable for such altered
documentation. Information of third parties may be subject to additional restrictions.

Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service
voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice.
TI is not responsible or liable for any such statements.

Buyer acknowledges and agrees that it is solely responsible for compliance with all legal, regulatory and safety-related requirements
concerning its products, and any use of TI components in its applications, notwithstanding any applications-related information or support
that may be provided by TI. Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which
anticipate dangerous consequences of failures, monitor failures and their consequences, lessen the likelihood of failures that might cause
harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use
of any TI components in safety-critical applications.

In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to
help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and
requirements. Nonetheless, such components are subject to these terms.

No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties
have executed a special agreement specifically governing such use.

Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in
military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components
which have

not

been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and

regulatory requirements in connection with such use.

TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of
non-designated products, TI will not be responsible for any failure to meet ISO/TS16949.

Products

Applications

Audio

www.ti.com/audio

Automotive and Transportation

www.ti.com/automotive

Amplifiers

amplifier.ti.com

Communications and Telecom

www.ti.com/communications

Data Converters

dataconverter.ti.com

Computers and Peripherals

www.ti.com/computers

DLP® Products

www.dlp.com

Consumer Electronics

www.ti.com/consumer-apps

DSP

dsp.ti.com

Energy and Lighting

www.ti.com/energy

Clocks and Timers

www.ti.com/clocks

Industrial

www.ti.com/industrial

Interface

interface.ti.com

Medical

www.ti.com/medical

Logic

logic.ti.com

Security

www.ti.com/security

Power Mgmt

power.ti.com

Space, Avionics and Defense

www.ti.com/space-avionics-defense

Microcontrollers

microcontroller.ti.com

Video and Imaging

www.ti.com/video

RFID

www.ti-rfid.com

OMAP Applications Processors

www.ti.com/omap

TI E2E Community

e2e.ti.com

Wireless Connectivity

www.ti.com/wirelessconnectivity

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

Copyright © 2015, Texas Instruments Incorporated

Summary of Contents for LM3248

Page 1: ...Using the LM3248 Evaluation Module User s Guide Literature Number SNAA196 September 2013 All trademarks are the property of their respective owners ...

Page 2: ...ides the RF power subsystem the capability to operate at lower battery voltages as well as increased PA linearity and transmit power margins over a wider battery voltage supply range This application note contains information specific to the evaluation board For device details and electrical characteristics please refer to the LM3248 data sheet If you are considering using the LM3248 in a system d...

Page 3: ...Black Machine Screw Roun 4 B F Fastener H1 H2 H3 H4 4 40 x 1 4 Nylon Philips NY PMS 440 0025 PH Digi Key Supply panhead Standoff Hex 0 5 L 4 40 H5 H6 H7 H8 4 Keystone 1902C Digi Key x 1 4 Nylon Inductor Shielded Metal L1 1 Composite 1µH 2 6A Toko 1276AS H 1R0N See Mfr 0 062Ω 3225 Inductor Shielded Metal L3 1 Composite 1 5µH 1 6A Toko 1285AS H 1R5M See Mfr 0 144Ω 2016 Header shrouded 100 mil TE P1 ...

Page 4: ...igi Key 0402 Not installed 3 5A Ferrite FB1 FB2 2 Bead 60Ω 100MHz TDK MPZ1608S600A Digi Key Mouser SMD 6 LM3248 Evaluation Module Photo Figure 1 LM3248 Evaluation Board 4 LM3248 2 7MHz 2 5A Boost Buck DC DC Converter Evaluation Module SNAA196 September 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 5: ...sure the signal sources are first set to 0V NOTE BOOST_GATE is a logic level signal see the LM3248 data sheet which represents the TTI frame interval A pulse or function generator should be used to drive this pin but should be configured to drive a high impedance load so that the level seen on the instrument panel is the same as that measured into a high Z load 50Ω mode will put out 2X the indicat...

Page 6: ... the signal The adjacent undotted is the ground pin Test Points PVIN BST Boost input node VBATT connection SW BST Boost switch node BST_OUT Boost output node SW BUCK Buck switch node BK OUT Buck output note Jumpers see Figure 8 for locations LBST Boost inductor jumper L BUCK Buck inductor jumper ACB ACB jumper 6 LM3248 2 7MHz 2 5A Boost Buck DC DC Converter Evaluation Module SNAA196 September 2013...

Page 7: ...n Board Layout Figure 2 Top Layer Figure 3 Bottom Layer Figure 4 Mid Layer 1 Figure 5 Mid Layer 2 7 SNAA196 September 2013 LM3248 2 7MHz 2 5A Boost Buck DC DC Converter Evaluation Module Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 8: ...rd Layout www ti com Figure 6 Mid Layer 3 Figure 7 Mid Layer 4 Figure 8 Bottom Layer Mirrored 8 LM3248 2 7MHz 2 5A Boost Buck DC DC Converter Evaluation Module SNAA196 September 2013 Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 9: ...LM3248 Evaluation Board Layout Figure 9 Stackup 9 SNAA196 September 2013 LM3248 2 7MHz 2 5A Boost Buck DC DC Converter Evaluation Module Submit Documentation Feedback Copyright 2013 Texas Instruments Incorporated ...

Page 10: ... 0201 C3 1000pF 0201 C9 0402 10µF C1 10µF 0402 C7 1 2 DNI FB1 DNI 1000pF 0201 C34 GND 0201 0 01µF C20 GND GND GND GND GND GND GND GND GND GND GND GND GND GND GND BG MODE 499 0201 R6 499 0201 R7 499 0201 R3 01005 3300pF C16 GND 1µF 0201 C18 01005 3300pF C19 2 2µF 0402 C21 DNI 4 7µF 0402 C17 DNI 0 DNI 0402 R2 1 2 OUT_BST 1 2 LBST 1 2 ACB 1 2 VCON_S 1 2 L BUCK 470µF C5 BUCK_OUT 1 2 BST_OUT 1 2 SW BST...

Page 11: ... BOOST PVIN_ BOOST OUT_ BOOST FB_ BUCK SW_ BUCK NC ENABLE PVIN_ BOOST MODE ACB DGND PVIN_ BUCK ACB SGND_ BUCK SW_ BOOST PGND VDD2_ BUCK PGND OUT_ BOOST 5 4 3 2 1 A B C D E F SW_ BOOST VDD1_ BUCK PGND VCON SW_ BUCK PVIN_ BUCK ATB1 ATB2 www ti com Connection Diagram 13 Connection Diagram Figure 10 Top View Bumps Down Figure 11 Bottom View Bumps Up 11 SNAA196 September 2013 LM3248 2 7MHz 2 5A Boost B...

Page 12: ...CK when used with Boost C3 SGND_BUCK Analog Ground for the Buck Analog Blocks C4 C5 PGND Power Ground for output FETs F3 Input Chip enable Setting ENABLE High biases up the Buck and initiates D1 ENABLE I VCON regulation by the Buck D2 VCON I Analog voltage control input which controls Buck output voltage D3 NC No Connect leave this pin floating D4 SW_BUCK 0 Buck converter switch node for external ...

Page 13: ...ring 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 ...

Page 14: ... 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 rég...

Page 15: ... 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 with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cu...

Page 16: ...F 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 ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Page 17: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

Reviews: