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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 TPS51220A EVM-476

Page 1: ...EVM 476 Recommended Test Setup 6 Figure 5 2 Recommended Tip and Barrel Technique to Measure Output Ripple Voltage 6 Figure 7 1 Efficiency 12 VIN 5 0 V Output 11 Figure 7 2 Efficiency 12 VIN 3 3 V Out...

Page 2: ...L2 jumpers JP1 and JP4 Selections 9 Table 6 2 FUNC jumper JP2 Selections 10 Table 6 3 TRIP JP3 Selections 10 Table 9 1 EVM Components List According to Schematic Shown in Figure 4 1 21 Trademarks All...

Page 3: ...2 Features Input range from 8 V to 20 V Dual 8 A outputs 3 3 V and 5 V Individual enable function for 3 3 V and 5 V output Selectable light load operation Selectable control architecture Inductor curr...

Page 4: ...DITIONS MIN TYP MAX UNITS Peak efficiency 96 Full load efficiency 95 Electrical Performance Specifications www ti com 4 TPS51220A Buck Controller Evaluation Module User s Guide SLUU381B SEPTEMBER 2009...

Page 5: ...PS51220A EVM 476 Schematic www ti com Schematic SLUU381B SEPTEMBER 2009 REVISED FEBRUARY 2022 Submit Document Feedback TPS51220A Buck Controller Evaluation Module User s Guide 5 Copyright 2022 Texas I...

Page 6: ...some of the test points Fan A fan is not required when testing the EVM Recommended Wire Gauge Both loads and input should be connected using a minimum gauge wire of AWG 16 Also these connections shoul...

Page 7: ...will be high when output is enabled via switch S1 TP11 EN2 Output 2 enable signal will be high when output is enabled via switch S2 TP12 PG1 Output 1 power good signal will be high when output is in r...

Page 8: ...sure VREF2 TP15 voltage using V6 it should read 1 98 V to 2 02 V 6 Make sure electronic load 1 is set to sink 0 A Set S1 EN1 to ON position S3 remains in ON position 7 Record VOUT1 voltage using V1 IO...

Page 9: ...rs JP1 and JP4 Selections JUMPER LOCATION MODE DESCRIPTION CCM 1 and 2 shorted CCM EVM remains in continuous current mode AS 3 and 4 shorted default Auto skip EVM enters auto skip mode at light load a...

Page 10: ...plied to the EVM 2 The TRIP jumper JP3 allows the user to select the voltage level used by the EVM to implement current limit It also enables or disables the output discharge function Table 6 3 descri...

Page 11: ...on 0 3 6 9 ILOAD Load Current A 4 95 4 97 4 99 5 01 5 03 5 05 4 96 4 98 5 00 5 02 5 04 V OUT Output Voltage V 8 7 5 4 2 1 AUTOSKIP OOA CCM Figure 7 3 12 VIN 5 0 V Load Regulation 0 3 6 9 ILOAD Load Cu...

Page 12: ...0 90 135 45 Phase o Gain Phase Figure 7 6 CCM mode 3 3 V Loop Response Gain and Phase fCO 90 kHz PM 63 7 4 Transient Response Figure 7 7 5 V CCM Mode Load Transient Figure 7 8 5 V D CAP Mode Load Tran...

Page 13: ...de Output Ripple 7 6 Turn On Waveform Figure 7 11 Enable Turn On Waveform www ti com Performance Data and Typical Characteristic Curves SLUU381B SEPTEMBER 2009 REVISED FEBRUARY 2022 Submit Document Fe...

Page 14: ...3 Enable Turn Off Without Discharge Waveform Performance Data and Typical Characteristic Curves www ti com 14 TPS51220A Buck Controller Evaluation Module User s Guide SLUU381B SEPTEMBER 2009 REVISED F...

Page 15: ...uses four layers of copper The two internal layers are 2 oz copper while the external layers are 1 oz copper Figure 8 1 Top Layer Assembly Drawing Top View www ti com EVM Assembly Drawing and PCB Layo...

Page 16: ...Top View EVM Assembly Drawing and PCB Layout www ti com 16 TPS51220A Buck Controller Evaluation Module User s Guide SLUU381B SEPTEMBER 2009 REVISED FEBRUARY 2022 Submit Document Feedback Copyright 20...

Page 17: ...iew www ti com EVM Assembly Drawing and PCB Layout SLUU381B SEPTEMBER 2009 REVISED FEBRUARY 2022 Submit Document Feedback TPS51220A Buck Controller Evaluation Module User s Guide 17 Copyright 2022 Tex...

Page 18: ...p View EVM Assembly Drawing and PCB Layout www ti com 18 TPS51220A Buck Controller Evaluation Module User s Guide SLUU381B SEPTEMBER 2009 REVISED FEBRUARY 2022 Submit Document Feedback Copyright 2022...

Page 19: ...p View www ti com EVM Assembly Drawing and PCB Layout SLUU381B SEPTEMBER 2009 REVISED FEBRUARY 2022 Submit Document Feedback TPS51220A Buck Controller Evaluation Module User s Guide 19 Copyright 2022...

Page 20: ...View EVM Assembly Drawing and PCB Layout www ti com 20 TPS51220A Buck Controller Evaluation Module User s Guide SLUU381B SEPTEMBER 2009 REVISED FEBRUARY 2022 Submit Document Feedback Copyright 2022 Te...

Page 21: ...W 5 0603 Std Std 1 R20 Resistor chip 300 k 1 16 W 1 0603 Std Std 1 R21 Resistor chip 8 20 k 1 16 W 1 0603 Std Std 1 R22 Resistor chip 7 50 k 1 16 W 1 0603 Std Std 2 R24 R25 Resistor chip 5 60 k 1 16...

Page 22: ...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 23: ...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 24: ...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 25: ...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 26: ...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 27: ...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 thes...

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