Texas Instruments TPS7B4255EVM-062 User Manual Download Page 16

www.ti.com

2

3

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 TPS7B4255EVM-062

Page 1: ...4255 Q1 low dropout linear regulator LDO Included in this user s guide are setup and operating instructions thermal and layout guidelines a printed circuit board PCB layout a schematic diagram and a b...

Page 2: ...3 3 TPS7B4255EVM 062 Load Transient Results 50 A to 70 mA Load Step 9 Figure 3 4 TPS7B4255EVM 062 Load Transient Results 70 mA to 50 A Load Step 9 Figure 4 1 Top Assembly Layer and Silkscreen 10 Figu...

Page 3: ...hat are connected to the main power supply The following warnings are noted for the safety of anyone using or working close to the TPS7B4255EVM 062 Observe all safety precautions WARNING Failure to ad...

Page 4: ...5QDYBRQ1 U1 100V 1uF C2 DNP 100V 1 F C5 DNP 50V 1uF C9 DNP VO 1 FB NC 2 GND 4 GND 5 GND 6 GND 3 VI 8 EN 7 PAD 9 TPS7B8401QWDRBRQ1 U2 VIN TP2 GND 1 2 3 4 5 6 J14 8V 17 8k R6 30 0k R7 48 7k R8 5V 3 3V G...

Page 5: ...e connection and the GND terminal is the negative that is ground connection 3 1 3 EN EN is a 3 pin header used to enable or disable the TPS7B84 Q1 which in turn enables the TPS7B4255 Q1 The center pin...

Page 6: ...n example as illustrated by the white boxes in Figure 3 2 The prepopulated capacitors are sized to ensure the minimum capacitance requirements are maintained under all normal operating conditions Opti...

Page 7: ...board layout is designed such that the Iin current probe slot does not detect any current that goes to the TPS7B84 Q1 circuit or its peripherals during start up or during any other operational mode T...

Page 8: ...per in the current path can reduce this ringing 10 AWG wire can be used as needed If ringing persists install damping networks by adding a series resistor and capacitor in parallel with VIN Locations...

Page 9: ...rated in Figure 3 3 and Figure 3 4 the TPS7B4255 Q1 transient response is very fast and the output voltage recovers in well under 1 ms after the initial load transient Use a pulse duration limit of 1...

Page 10: ...most at risk of raising the junction temperature during normal operation The LDO may become hot to the touch during normal operation see the thermal impedance discussion in the TPS7B4255 Q1 data sheet...

Page 11: ...rnal Layer 4 Figure 4 7 Bottom Layer Routing Figure 4 8 Bottom Assembly Layer and Silkscreen www ti com Board Layout SLVUCA5 JUNE 2022 Submit Document Feedback TPS7B4255EVM 062 Evaluation Module 11 Co...

Page 12: ...J21 3 SMA Straight Jack Gold 50 Ohm TH SMA Straight Jack TH 901 144 8RFX Amphenol RF J3 J4 J20 3 Standard Banana Jack insulated 10A red 571 0500 571 0500 DEM Manufacturing J5 J11 2 Header 100mil 2x1...

Page 13: ...omotive T R 0805 CGA4J1X7R1H475 K125AC TDK Corporation C2 C3 C6 0 1uF CAP CERM 1 uF 100 V 10 X7R 1206 1206 C3216X7R2A105K1 60AA TDK C5 0 1uF CAP CERM 1 F 100 V 10 X7R AEC Q200 Grade 1 0805 0805 08051C...

Page 14: ...5 0805 RL1220S 1R0 F Susumu Co Ltd R5 R17 0 1 00k RES 1 00 k 1 0 125 W AEC Q200 Grade 0 0805 0805 ERJ 6ENF1001V Panasonic R9 R10 R11 R12 R13 0 154 RES 154 1 0 5 W 1210 1210 RC1210FR 07154R L Yageo R14...

Page 15: ...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 16: ...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 17: ...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 18: ...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 19: ...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 20: ...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...

Reviews: