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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.

Содержание TPS54231

Страница 1: ...VM 372 Line Regulation 6 Figure 2 5 TPS54231EVM 372 Transient Response 6 Figure 2 6 TPS54231EVM 372 Loop Response 7 Figure 2 7 TPS54231EVM 372 Output Ripple 7 Figure 2 8 TPS54231EVM 372 Input Ripple 8 Figure 2 9 TPS54231EVM 372 Start Up Relative to VIN 8 Figure 2 10 TPS54231EVM 372 Start up Relative to Enable 9 Figure 2 11 TPS54231EVM 372 Eco mode Operation 9 Figure 2 12 TPS54231EVM 372 Thermal Im...

Страница 2: ...dervoltage lockout inputs The absolute maximum input voltage is 30 V for the TPS54231EVM 372 Table 1 1 Input Voltage and Output Current Summary EVM INPUT VOLTAGE RANGE OUTPUT CURRENT RANGE TPS54231EVM 372 VIN 7 V to 28 V 0 A to 2 A 1 2 Performance Specification Summary A summary of the TPS54231EVM 372 performance specifications is provided in Table 1 2 Specifications are given for an input voltage...

Страница 3: ... section describes how to properly connect set up and use the TPS54231EVM 372 evaluation module The section also includes test results typical for the evaluation module and covers efficiency output voltage regulation load transients loop response output ripple input ripple and start up 2 1 Input Output Connections The TPS54231EVM 372 is provided with input output connectors and test points as show...

Страница 4: ...f this EVM peaks at a load current of about 0 5 A 1 A and then decreases as the load current increases towards full load Figure 2 1 shows the efficiency for the TPS54231EVM 372 at an ambient temperature of 25 C 0 10 20 30 40 50 60 70 80 90 100 0 00 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 Output Current A IO Efficiency V 15 V IN V 24 V IN V 28 V IN V 7 V IN Figure 2 1 TPS54231EVM 372 Efficiency Fig...

Страница 5: ...Regulation The load regulation for the TPS54231EVM 372 is shown in Figure 2 3 0 10 0 05 0 00 0 05 0 10 0 15 0 20 0 00 0 25 0 50 0 75 1 00 1 25 1 50 1 75 2 00 Output Current A Output Regulation Output Current I A O Output Regulation V 7 V IN V 15 V IN V 24 V IN V 28 V IN Figure 2 3 TPS54231EVM 372 Load Regulation Measurements are given for an ambient temperature of 25 C www ti com Test Setup and Re...

Страница 6: ...ents The TPS54231EVM 372 response to load transients is shown in Figure 2 5 The current step is from 25 to 75 of maximum rated load at 15V input Total peak to peak voltage variation is as shown including ripple and noise on the output Figure 2 5 TPS54231EVM 372 Transient Response Test Setup and Results www ti com 6 TPS54231 Step Down Converter Evaluation Module User s Guide SLVU263A AUGUST 2008 RE...

Страница 7: ...igure 2 6 TPS54231EVM 372 Loop Response 2 7 Output Voltage Ripple The TPS54231EVM 372 output voltage ripple is shown in Figure 2 7 The output current is the rated full load of 2 A and VIN 15 V The ripple voltage is measured directly across the output capacitors Figure 2 7 TPS54231EVM 372 Output Ripple www ti com Test Setup and Results SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedb...

Страница 8: ...tage is initially applied and the output is inhibited by using a jumper at J2 to tie EN to GND When the jumper is removed EN is released When the EN voltage reaches the enable threshold voltage of 1 25 V the start up sequence begins and the internal reference voltage begins to ramp up at the internally set rate toward 0 8 V and the output voltage ramps up to the externally set value of 3 3 V The i...

Страница 9: ... 372 Eco mode Operation 2 11 Thermal Characteristics This section shows a thermal image of the TPS54231EVM 372 running at 28 V input and 2 A load These are the worst case conditions for maximum power loss There is no air flow and the ambient temperature is 25 C The peak temperature of the IC 85 8 C is well below the maximum recommended operating condition listed in the datasheet of 150 C www ti co...

Страница 10: ...72 Thermal Image Test Setup and Results www ti com 10 TPS54231 Step Down Converter Evaluation Module User s Guide SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 11: ...ced around the board including ten vias directly under the TPS54231 device to provide a thermal path from the top side ground plane to the bottom side ground plane The input decoupling capacitors C1 C2 and C3 and bootstrap capacitor C4 are all located as close to the IC as possible In addition the voltage set point resistor divider components are also kept close to the IC The voltage divider netwo...

Страница 12: ...d printed circuit board area for the components used in this design is 0 68 in2 This area does not include test point or connectors Board Layout www ti com 12 TPS54231 Step Down Converter Evaluation Module User s Guide SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 13: ...of materials 4 1 Schematic Figure 4 1 is the schematic for the TPS54231EVM 372 www ti com Schematic and Bill of Materials SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedback TPS54231 Step Down Converter Evaluation Module User s Guide 13 Copyright 2021 Texas Instruments Incorporated ...

Страница 14: ...resents the bill of materials for the TPS54231EVM 372 Schematic and Bill of Materials www ti com 14 TPS54231 Step Down Converter Evaluation Module User s Guide SLVU263A AUGUST 2008 REVISED OCTOBER 2021 Submit Document Feedback Copyright 2021 Texas Instruments Incorporated ...

Страница 15: ... Chip 1 16W 1 0603 Std Std 1 R3 29 4k Resistor Chip 1 16W 1 0603 Std Std 1 R4 0 Resistor Chip 1 16W 1 0603 Std Std 1 R5 10 2k Resistor Chip 1 16W 1 0603 Std Std 1 R6 3 24k Resistor Chip 1 16W 1 0603 Std Std 0 R7 Open Resistor Chip 1 16W 1 0603 Std Std 3 TP1 TP3 TP5 5000 Test Point Red Thru Hole Color Keyed 0 100 0 100 inch 5000 Keystone 3 TP2 TP4 TP6 5001 Test Point Black Thru Hole Color Keyed 0 1...

Страница 16: ...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...

Страница 17: ... 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...

Страница 18: ...y 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 R...

Страница 19: ... 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 electrical shock hazard User assumes all responsibility and liability for any improper or unsafe handling or use of the EVM by User or its employees affiliates contractors or designees 4 4 User assumes all...

Страница 20: ...OR 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 Furthermore no return of EVM s will be accepted if the package has been opened and no return of the EVM s will be accepted if they are damaged or otherwise not in a resalable condition If User feels it has...

Страница 21: ...o 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 reproduction and display of these resources is prohibited No license is granted to any other TI intellectual property right or to any third party intellectual property right TI disclaims responsibility for and you will fully indemn...

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