Texas Instruments TPS548A28 User Manual Download Page 21

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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.

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.

Summary of Contents for TPS548A28

Page 1: ...Efficiency 6 2 4 Load Regulation 8 2 5 Load Transients 9 2 6 Loop Characteristics 10 2 7 Output Voltage Ripple 11 2 8 Powering Up 12 3 Schematic List of Materials and Layout 13 3 1 Schematic 14 3 2 Li...

Page 2: ...ry Rated input voltage and output current ranges for the evaluation module are given in Table 1 1 1 Background The EVM is setup to allow the user to evaluate the performance of the TPS54JA20 IC and ea...

Page 3: ...16 V 0 12 12 A Internal LDO Voltage 3 0 V Line regulation VIN 4 V to 16 V IO 12 A 0 07 Load regulation VIN 12 V IO 0 A to 12 A 0 12 Load transient response IO 3 A to 9 A 2 A us Voltage change 50 mV Re...

Page 4: ...p Mode 121k 10 to AGND Short Pins 5 and 6 1000 kHz Forced CCM 60 4k 10 to AGND Short Pins 7 and 8 800 kHz Forced CCM 30 1k 10 to AGND Short Pins 9 and 10 600 kHz Forced CCM Short to AGND Short Pins 11...

Page 5: ...VOUT as the ground reference Table 5 TPS54JA20EVM EVM Connectors and Test Points REFERENCE DESIGNATOR FUNCTION J1 VIN input voltage connector see Table 1 for VIN range J2 PGND connection for input J3...

Page 6: ...S54JA20EVM 023 12 A Buck Converter Evaluation Module 2 3 Efficiency The efficiency of this EVM peaks at a load current of about 6 A and then decreases as the load current increases toward full load Th...

Page 7: ...80 90 100 Vout 2 5 V 800 kHz 800 nH VCC Int Skip D022 Vin 8 V Vin 12 V Vin 16 V www ti com Test Setup and Results 7 SLVUBO0A March 2020 Revised May 2020 Submit Documentation Feedback Copyright 2020 Te...

Page 8: ...2 511 2 514 2 517 800 kHz 800 nH FCCM VCC Int D024 Vin 8 V Vin 12 V Vin 16 V Test Setup and Results www ti com 8 SLVUBO0A March 2020 Revised May 2020 Submit Documentation Feedback Copyright 2020 Texa...

Page 9: ...Buck Converter Evaluation Module 2 5 Load Transients Figure 8 and Figure 9 show how the TPS54JA20EVM response to load transients The current step is from 25 to 75 Load The current step slew rate is 2...

Page 10: ...t 12 A D018 Gain Phase Test Setup and Results www ti com 10 SLVUBO0A March 2020 Revised May 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated Using the TPS54JA20EVM 023...

Page 11: ...23 12 A Buck Converter Evaluation Module 2 7 Output Voltage Ripple Figure 11 Figure 12 and Figure 13 show the TPS54JA20EVM output voltage ripple VIN 12 V The ripple voltage is measured directly across...

Page 12: ...rt up waveforms for the TPS54JA20EVM In Figure 14 the start up sequence begins as soon as the EN voltage is increased above the enable threshold voltage and the output voltage ramps up to the external...

Page 13: ...0 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated Using the TPS54JA20EVM 023 12 A Buck Converter Evaluation Module 3 Schematic List of Materials and Layout This section pro...

Page 14: ...UBO0A March 2020 Revised May 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated Using the TPS54JA20EVM 023 12 A Buck Converter Evaluation Module 3 1 Schematic The followi...

Page 15: ...C80J476KE 18L MuRata C19 1 CAP CERM 0 22 uF 16 V 10 X7R 0603 C1608X7R1C224K08 0AC TDK C20 1 CAP CERM 0 022 uF 16 V 10 X7R 0603 C0603C223K4RACTU Kemet L1 1 Inductor Shielded Composite 800 nH 25 8 A 0 0...

Page 16: ...lane The internal layer 2 contains an additional large ground copper area as well as an additional VOUT copper fill The bottom layer is another ground plane with two additional traces for the output v...

Page 17: ...O0A March 2020 Revised May 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated Using the TPS54JA20EVM 023 12 A Buck Converter Evaluation Module Figure 16 TPS54JA20EVM Top...

Page 18: ...A March 2020 Revised May 2020 Submit Documentation Feedback Copyright 2020 Texas Instruments Incorporated Using the TPS54JA20EVM 023 12 A Buck Converter Evaluation Module Figure 18 TPS54JA20EVM Intern...

Page 19: ...dback Copyright 2020 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...

Page 20: ...ther 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 tec...

Page 21: ...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 in...

Page 22: ...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 s...

Page 23: ...any interfaces electronic and or mechanical between the EVM and any human body are designed with suitable isolation and means to safely limit accessible leakage currents to minimize the risk of electr...

Page 24: ...R DAMAGES ARE CLAIMED THE EXISTENCE OF MORE THAN ONE CLAIM SHALL NOT ENLARGE OR EXTEND THIS LIMIT 9 Return Policy Except as otherwise provided TI does not offer any refunds returns or exchanges Furthe...

Page 25: ...e resources are subject to change without notice TI grants you permission to use these resources only for development of an application that uses the TI products described in the resource Other reprod...

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