background image

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 LMR33640

Page 1: ...synchronous step down DC DC converters capable of driving up to 4 A of load current from an input voltage of 3 8 V to 36 V The LMR33640EVM features a selectable output voltage of 3 3 V or 5 V and a switching frequency of either 400 kHz See the LMR33640 SIMPLE SWITCHER 3 8 V to 36 V 4 A Step Down Converter Data Sheet for additional features detailed description and available options Table 1 shows t...

Page 2: ... 1 2 EVM Board Connections 3 3 EVM Card Edge Connections 4 4 Jumper Locations 4 5 FRA Setup 5 6 Efficiency VIN 12 V VOUT 5 V ƒSW 400 KHz 6 7 Efficiency VIN 12 V VOUT 3 3V ƒSW 400 kHz 6 8 LMR33640EVM Schematic 7 9 Top View of EVM 8 10 EVM Top Copper Layer 8 11 EVM Mid Layer One 9 12 EVM Mid Layer Two 9 13 EVM Bottom Copper Layer 10 List of Tables 1 Device and Package Configurations 1 2 BOM for LMR3...

Page 3: ...e card edge connector can be used for connections See Figure 2 for the top of board connections and Figure 3 for the card edge connections The following are the functions of the connections VIN Input supply to EVM Connect to a suitable input supply See the LMR33640 SIMPLE SWITCHER 3 8 V to 36 V 4 A Step Down Converter Data Sheet for input supply requirements GND System ground VOUT Output of EVM Co...

Page 4: ...r allows the EN input to be connected to either ground OFF or VIN ON Remove this jumper to allow an external logic signal to control the EN function VOUT This jumper is used to select one of the two pre defined output voltages The 3 3V position provides a 3 3 V output while the 5V position provides a 5 V output Figure 4 Jumper Locations 1 2 Test Points VIN Input supply to EVM Connect to a suitable...

Page 5: ...ag output This test point is connected to VCC through a 20 kΩ resistor The power good function can be monitored at this test point A Connection for frequency response analyzer on bottom of board See Figure 5 Figure 5 FRA Setup 2 Operation Once the previously described connections are made and the appropriate jumpers are set the EVM is ready to use If external control of the EN input is desired rem...

Page 6: ...e can be programmed by changing the value of RFBB on the EVM In addition the values of the inductor and the output capacitance may also need to be changed See the LMR33640 SIMPLE SWITCHER 3 8 V to 36 V 4 A Step Down Converter Data Sheet for more information The EVM has been designed for maximum flexibility regarding component selection This allows the user to place preferred components such as the...

Page 7: ...www ti com Schematic 7 SNVU664 November 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated LMR33640EVM User s Guide 4 Schematic Figure 8 LMR33640EVM Schematic ...

Page 8: ...out www ti com 8 SNVU664 November 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated LMR33640EVM User s Guide 5 Board Layout Figure 9 Top View of EVM Figure 10 EVM Top Copper Layer ...

Page 9: ...ww ti com Board Layout 9 SNVU664 November 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated LMR33640EVM User s Guide Figure 11 EVM Mid Layer One Figure 12 EVM Mid Layer Two ...

Page 10: ...Board Layout www ti com 10 SNVU664 November 2019 Submit Documentation Feedback Copyright 2019 Texas Instruments Incorporated LMR33640EVM User s Guide Figure 13 EVM Bottom Copper Layer ...

Page 11: ...250AC 0 C10 Cff CAP CERM 10 pF 50 V 5 C0G NP0 0603 TDK CGA3E2NP01H100D080AA 0 J1 VIN Standard Banana Jack Uninsulated 8 9 mm Keystone 575 8 1 J2 GND Standard Banana Jack Uninsulated 8 9 mm Keystone 575 8 1 J5 VOUT Standard Banana Jack Uninsulated 8 9 mm Keystone 575 8 1 J3 VSEL Header 100 mil 3x1 Gold TH Samtec HTSW 103 07 G S 1 J4 EN Header 100 mil 3x1 Gold TH Samtec HTSW 103 07 G S 1 L1 L1 Induc...

Page 12: ...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...

Page 13: ... 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...

Page 14: ...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...

Page 15: ... 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...

Page 16: ...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...

Page 17: ...se 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 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...

Reviews: