Texas Instruments LM5161 User Manual Download Page 16

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

Concerning EVMs Including Radio Transmitters:

This device complies with Industry Canada license-exempt RSS standard(s). 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.

Concernant les EVMs avec antennes détachables

Conformément à la réglementation d'Industrie Canada, le présent émetteur radio peut fonctionner avec une antenne d'un type et
d'un gain maximal (ou inférieur) approuvé pour l'émetteur par Industrie Canada. Dans le but de réduire les risques de brouillage
radioélectrique à l'intention des autres utilisateurs, il faut choisir le type d'antenne et son gain de sorte que la puissance isotrope
rayonnée équivalente (p.i.r.e.) ne dépasse pas l'intensité nécessaire à l'établissement d'une communication satisfaisante. Le
présent émetteur radio a été approuvé par Industrie Canada pour fonctionner avec les types d'antenne énumérés dans le
manuel d’usage et ayant un gain admissible maximal et l'impédance requise pour chaque type d'antenne. Les types d'antenne
non inclus dans cette liste, ou dont le gain est supérieur au gain maximal indiqué, sont strictement interdits pour l'exploitation de
l'émetteur

3.3

Japan

3.3.1

Notice for EVMs delivered in Japan:

Please see

http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page

日本国内に

輸入される評価用キット、ボードについては、次のところをご覧ください。

http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_01.page

3.3.2

Notice for Users of EVMs Considered “Radio Frequency Products” in Japan:

EVMs entering Japan may not be certified

by TI as conforming to Technical Regulations of Radio Law of Japan.

If User uses EVMs in Japan, not certified to Technical Regulations of Radio Law of Japan, User is required by Radio Law of
Japan to follow the instructions below with respect to EVMs:

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 Radio Law of Japan with respect to
EVMs, or

3.

Use of EVMs only after User obtains the Technical Regulations Conformity Certification as provided in Radio Law of Japan
with respect to EVMs. Also, do not transfer EVMs, unless User gives the same notice above to the transferee. Please note
that if User does not follow the instructions above, User will be subject to penalties of Radio Law of Japan.

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Summary of Contents for LM5161

Page 1: ...LM5161PWPBKEVM Buck Evaluation Module User s Guide Literature Number SNVU504A August 2016 Revised August 2016 ...

Page 2: ...Table of Contents Contents 1 Introduction 5 2 EVM Description and Performance Specifications 5 3 Test Setup and Operation 5 3 1 Recommended Test Setup 5 3 2 Operation 6 4 Typical Performance Curves 7 5 LM5161 Buck EVM Schematic 11 6 LM5161 Buck EVM Bill of Materials 12 7 LM5161 Buck EVM PCB Layout 12 Revision History 14 ...

Page 3: ...oad 8 11 Load Transient ILoad No Load to Full Load to No Load in DCM 8 12 Load Transient ILoad No Load to Full Load in DCM 8 13 Load Transient ILoad Full Load to No Load in DCM 8 14 Load Transient ILoad No Load to Full Load to No Load in CCM 9 15 Load Transient ILoad No Load to Full Load in CCM 9 16 Load Transient ILoad Full Load to No Load in CCM 9 17 Short Circuit ILoad Full Load to Short to Ful...

Page 4: ...sed August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated List of Tables List of Tables 1 LM5161 Buck EVM Specifications 5 2 FPWM Pin Mode 7 3 LM5161 Buck EVM Bill of Materials for 300 kHz Configuration 12 ...

Page 5: ...es a 12 V output over an input voltage range of 15 V to 80 V with output current rated up to 1 A The application schematic of the EVM has been set up to operate from a nominal 48 V input supply The switching frequency is set to approximately 300 kHz The board is designed to demonstrate a synchronous buck with small solution size for 12 W wide VIN applications Table 1 LM5161 Buck EVM Specifications...

Page 6: ...ll solution size The saturation current rating ISAT of the inductor should be higher than the LM5161 integrated high side FET peak current limit threshold of 1 9 A max The nominal switching frequency in Hz can be set using the RON R1 in the EVM resistor as shown in Equation 1 1 The output voltage is set by using the feedback divider resistors R8 RFB1 and R7 RFB2 in the EVM by using Equation 2 2 Th...

Page 7: ... series with the output capacitors or the external ripple injection circuit see Section 7 for more details The internal emulated ripple is sufficient to maintain steady state and dynamic stability while operating in this mode In a typical buck application at TJ 125 C and FPWM 0 with the input voltage VIN 72 V and the VCC externally supplied add a BST resistor R2 recommended 3Ω in series with the B...

Page 8: ...it Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM5161 Buck EVM User s Guide VOUT 12 V FPWM 1 FSW 300kHz Figure 4 Efficiency vs IOUT VOUT VCC diode connected FSW 300kHz VOUT 12 V Figure 5 Efficiency Comparison Between Forced CCM and DCM VIN 48 V FSW 300kHz FPWM 1 VOUT VCC diode connected Figure 6 Startup at Full Load Figure 7 Steady State at VIN 48 V and FPWM 0 no load Figu...

Page 9: ...V FPWM 0 FSW 300kHz Figure 11 Load Transient ILoad No Load to Full Load to No Load in DCM VIN 48 V FPWM 0 FSW 300kHz VOUT 12 V Figure 12 Load Transient ILoad No Load to Full Load in DCM VIN 48 V FPWM 0 FSW 300kHz VOUT 12 V Figure 13 Load Transient ILoad Full Load to No Load in DCM VIN 48 V FPWM 1 FSW 300kHz VOUT 12 V Figure 14 Load Transient ILoad No Load to Full Load to No Load in CCM VIN 48 V FP...

Page 10: ...Buck EVM User s Guide VIN 48 V FPWM 1 FSW 300kHz VOUT 12 V Figure 16 Load Transient ILoad Full Load to No Load in CCM VIN 48 V FSW 300kHz VOUT 12 V Figure 17 Short Circuit ILoad Full Load to Short to Full Load VIN 48 V FSW 300kHz VOUT 12 V Figure 18 Short Circuit ILoad Full Load to Short FSW 300kHz VOUT 12 V ILoad 500 mA Figure 19 Line Transient 36VIN 100VIN 72VIN ...

Page 11: ...3 6 81k R9 402k R1 IOUT 1A 100k R6 10 0k R7 0 R4 10µF C12 1000pF C7 1 2 J1 VIN 15 80VDC L2 DR125 101 R 2 2µF C4 10µF C11 SW SW 1 2 J3 GND 1 2 J4 0 R2 Copyright 2016 Texas Instruments Incorporated www ti com LM5161 Buck EVM Schematic 11 SNVU504A August 2016 Revised August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM5161 Buck EVM User s Guide 5 LM5161 Buck EVM ...

Page 12: ...25 W R9 Vishay Dale CRCW06036K81FKEA 0603 RES 6 81 k 1 0 1 W R6 Vishay Dale CRCW0603100KFKEA 0603 RES 100 k 1 0 1 W R7 Vishay Dale CRCW060310K0FKEA 0603 RES 10 0 k 1 0 1 W R8 Vishay Dale CRCW06032K00FKEA 0603 RES 2 00k 1 0 1W U1 Texas Instruments LM5161PWPR 4 4 mm x 5 0 mm HTSSOP 14 C7 MuRata GRM188R72A102KA01D 0603 CAP CERM 1000 pF 100 V 10 X7R C10 MuRata Unpopulated if FPWM 0 GCM188R71H104KA57D ...

Page 13: ...2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated LM5161 Buck EVM User s Guide Figure 21 EVM Component View with LM5161 Figure 22 EVM Top Copper View with LM5161 Figure 23 EVM Bottom Copper View with LM5161 Figure 24 EVM Top Solder Mask with LM5161 ...

Page 14: ... August 2016 Submit Documentation Feedback Copyright 2016 Texas Instruments Incorporated Revision History Revision History Changes from Original August 2016 to A Revision Page Changed datasheet crossreference to LM5161 7 Changed Orderable name to LM5161PWPR 12 ...

Page 15: ...ring the warranty period to the address designated by TI and that are determined by TI not to conform to such warranty If TI elects to repair or replace such EVM TI shall have a reasonable time to repair such EVM or provide replacements Repaired EVMs shall be warranted for the remainder of the original warranty period Replaced EVMs shall be warranted for a new full ninety 90 day warranty period 3 ...

Page 16: ... 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 Concernant les EVMs avec antennes détachables Conformément à la rég...

Page 17: ... connecting any load to the EVM output If there is uncertainty as to the load specification please contact a TI field representative During normal operation even with the inputs and outputs kept within the specified allowable ranges some circuit components may have elevated case temperatures These components include but are not limited to linear regulators switching transistors pass transistors cu...

Page 18: ...F REMOVAL OR REINSTALLATION ANCILLARY COSTS TO THE PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES RETESTING OUTSIDE COMPUTER TIME LABOR COSTS LOSS OF GOODWILL LOSS OF PROFITS LOSS OF SAVINGS LOSS OF USE LOSS OF DATA OR BUSINESS INTERRUPTION NO CLAIM SUIT OR ACTION SHALL BE BROUGHT AGAINST TI MORE THAN ONE YEAR AFTER THE RELATED CAUSE OF ACTION HAS OCCURRED 8 2 Specific Limitations IN NO EVENT SHALL T...

Page 19: ...esponsible for compliance with all legal regulatory and safety related requirements concerning its products and any use of TI components in its applications notwithstanding any applications related information or support that may be provided by TI Buyer represents and agrees that it has all the necessary expertise to create and implement safeguards which anticipate dangerous consequences of failur...

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