LMZ34202EVM

User's Guide SNVU514 – March 2016 LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module The LMZ34202EVM evaluation module is designed as an easy-to-use platform that facilitates an extensive evaluation of the features and performance of the Simple Switcher® power module. This guide provides information on the correct usage of the EVM and an explanation of the numerous test points on the board. 1 Description This EVM features the LMZ34202 synchronous buck power module configured for operation with typical 12-V to 42-V input bus applications. The output voltage can be set to one of five popular values by using a configuration jumper. In similar fashion, the switching frequency can be set to one of five values with a jumper. The full output current rating of the device can be supplied by the EVM. Input and output capacitors are included on the board to accommodate the entire range of input and output voltages. Monitoring test points are provided to allow measurement of efficiency, power dissipation, input ripple, output ripple, line and load regulation, and transient response. Control test points are provided for use of the slow-start/tracking, Inhibit/UVLO, PWRGD, and synchronization features of the LMZ34202 device. The EVM uses a recommended PCB layout that maximizes thermal performance and minimizes output ripple and noise. 2 Getting Started Figure 1 highlights the user interface items associated with the EVM. The polarized PVin Power terminal block (TB1) is used for connection to the host input supply and the polarized Vout Power terminal block (TB2) is used for connection to the load. These terminal blocks can accept up to 16-AWG wire. Verify the polarity of the PVIN and PGND connections for TB1 based on the label beneath the terminal block. Figure 1. LMZ34202EVM User Interface SNVU514 – March 2016 Submit Documentation Feedback LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module Copyright © 2016, Texas Instruments Incorporated 1 Test Point Descriptions www.ti.com The PVin Monitor and Vout Monitor test points located near the power terminal blocks are intended to be used as voltage monitoring points where voltmeters can be connected to measure PVin and Vout. The voltmeter references should be connected to any of the four PVin/Vout Monitor Grounds test points located between the power terminal blocks (labeled AGND). Do not use these PVin and Vout monitoring test points as the input supply or output load connection points. The PCB traces connecting to these test points are not designed to support high currents. The PVin Scope (J1) and Vout Scope (J2) test points can be used to monitor PVin and Vout waveforms with an oscilloscope. These test points are intended for use with un-hooded scope probes outfitted with a low-inductance ground lead (ground spring) mounted to the scope barrel. The two sockets of each test point are on 0.1 in centers. The scope probe tip should be connected to the socket labeled VIN or VOUT, and the scope ground lead should be connected to the socket labeled PGND. The controls test points located directly below the device are made available to test the features of the device. Any external connections made to these test points should be referenced to the AGND test point located along the bottom of the EVM. Refer to the Test Points Descriptions section of this guide for more information on the individual control test points. The Vout Select jumper (P1) and Fsw Select jumper (P2) are provided for selecting the desired output voltage and appropriate switching frequency. Before applying power to the EVM, ensure that the jumpers are present and properly positioned for the intended output voltage. Refer to Table 1 for the recommended jumper settings. Always remove input power before changing the jumper settings. Once the jumper settings have been confirmed, configure the host input supply to apply the appropriate bus voltage listed in Table 1 and confirm that the selected output voltage is obtained. Table 1. Output Voltage and Switching Frequency Jumper Settings LMZ34202 Vout Select Fsw Select 2.5 V 300 kHz 3.3 V 300 kHz 5.0 V 500 kHz 6.0 V 500 kHz 7.5 V 500 kHz The Versa-Comp settings can be adjusted using jumper J3. The Versa-Comp feature of the LMZ34202 provides the user with a simple method of adjusting the module's internal compensation network to provide the optimized phase and gain margin based on the output voltage and amount of output capacitance. Remove the jumper from J3 when operating the EVM as received from the factory. When operating the EVM with additional output capacitance, see the LMZ34202 datasheet for Versa-Comp settings. Jumper J4 allows the user to select the input source of the internal bias circuitry to improve efficiency. For output voltages ≥ 4.5V, place the jumper across the center and top position of J4. For output voltages < 4.5V, place the jumper across the center and bottom position of J4. 3 Test Point Descriptions Twelve wire-loop test points and two scope probe test points have been provided as convenient connection points for digital voltmeters (DVM) or oscilloscope probes to aid in the evaluation of the device. A description of each test point follows: Table 2. Test Point Descriptions (1) PVIN Input voltage monitor. Connect DVM to this point for measuring efficiency. VOUT Output voltage monitor. Connect DVM to this point for measuring efficiency, line regulation, and load regulation. AGND Input and output voltage monitor grounds (located between terminal blocks). Reference the above DVMs to any of these four analog ground points. (1) 2 Refer to the LMZ34202/H datasheet for absolute maximum ratings associated with above features. LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module Copyright © 2016, Texas Instruments Incorporated SNVU514 – March 2016 Submit Documentation Feedback Operation Notes www.ti.com Table 2. Test Point Descriptions (1) (continued) 4 PVIN Scope (J1) Input voltage scope monitor. Connect an oscilloscope to this set of points to measure input ripple voltage. VOUT Scope (J2) Output voltage scope monitor. Connect an oscilloscope to this set of points to measure output ripple voltage and transient response. PWRGD Monitors the power good signal of the device. This is an open drain signal that requires an external pullup resistor if monitoring is desired. A 10-kΩ to 100-kΩ pullup resistor is recommended. PWRGD is high if the output voltage is within 92% to 107% of its nominal value. INH/UVLO Connect this point to control ground to inhibit the device. Allow this point to float to enable the device. An external resistor divider can be connected between this point, control ground, and Vin to adjust the UVLO of the device. CLK Connects to the CLK pin of the device. An external clock signal can be applied to this point to synchronize the device to an appropriate frequency. SS/TR Connects to the internal slow-start capacitor of the device. An external capacitor can be connected from this point to control ground to increase the slow-start time of the device. This point can also be used as for tracking applications. AGND Control ground (located along bottom of EVM). Reference any signals associated with the control test points to this analog ground point. Operation Notes In order to operate the EVM apply a voltage in the range of 4.5V to 42V for the LMZ34202. The UVLO threshold of the EVM is approximately 4 V with 0.4 V of hysteresis. The input voltage must be above the UVLO threshold in order for the device to startup. After startup, the minimum input voltage to the device must be at least 4.5 V or (Vout + 2 V), whichever is greater. Refer to the LMZ34202 datasheet for further information on the input voltage range and UVLO operation. After application of the proper input voltage, the output voltage of the device will ramp to its final value in approximately 4.1 ms. If desired, this soft-start time can be increased by adding a capacitor to the SS/TR test point as described above. Refer to the LMZ34202 datasheet for further information on adjusting the soft-start time. Table 1 lists the recommended switching frequencies for each of the Vout selections. These recommendations cover operation over a wide range of input voltage and output load conditions. Several factors such as duty cycle, minimum on-time, minimum off-time, and current limit influence selection of the appropriate switching frequency. In some applications, other switching frequencies might be used for particular output voltages, depending on the above factors. Refer to the LMZ34202 datasheet for further information on switching frequency selection, including synchronization. The EVM includes input and output capacitors to accommodate the entire range of input and output voltage conditions. The actual capacitance required will depend on the input and output voltage conditions of the particular application, along with the desired transient response. In most cases, the required output capacitance will be less than that supplied on the EVM. Refer to the LMZ34202 datasheet for further information on the minimum required input and output capacitance. 5 Performance Data Figure 2 through Figure 7 demonstrate the LMZ34202EVM performance. For more data regarding the LMZ34202 please see the product data sheet. SNVU514 – March 2016 Submit Documentation Feedback LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module Copyright © 2016, Texas Instruments Incorporated 3 Performance Data 4 www.ti.com Figure 2. LMZ34202EVM Efficiency (Vin = 12V) Figure 3. LMZ34202EVM Efficiency (Vin = 24V) Figure 4. LMZ34202EVM Ripple Voltage (Fsw = 300 KHz) Figure 5. LMZ34202EVM Ripple Voltage (Fsw = 500 KHz) Figure 6. LMZ34202EVM Start-up Waveforms Figure 7. LMZ34202EVM Shut-down Waveforms LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module Copyright © 2016, Texas Instruments Incorporated SNVU514 – March 2016 Submit Documentation Feedback Schematic www.ti.com 6 Schematic Figure 8 is the schematic for this EVM. Figure 8. LMZ34202EVM Schematic LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module SNVU514 – March 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated 5 Bill of Materials 7 www.ti.com Bill of Materials Figure 9 is the BOM for the EVM. Figure 9. LMZ34202 Bill Of Material 6 LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module SNVU514 – March 2016 Submit Documentation Feedback Copyright © 2016, Texas Instruments Incorporated PCB Layout www.ti.com 8 PCB Layout Figure 10 through Figure 17 show the PCB layers of the LMZ34202HEVM. The layout is the same for the LMZ34202EVM. Figure 10. LMZ34202EVM Topside Component Layout Figure 11. LMZ34202EVM Topside Soldermask SNVU514 – March 2016 Submit Documentation Feedback LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module Copyright © 2016, Texas Instruments Incorporated 7 PCB Layout www.ti.com Figure 12. LMZ34202EVM Layer 1 Copper Figure 13. LMZ34202EVM Layer 2 Copper 8 LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module Copyright © 2016, Texas Instruments Incorporated SNVU514 – March 2016 Submit Documentation Feedback PCB Layout www.ti.com Figure 14. LMZ34202EVM Layer 3 Copper Figure 15. LMZ34202EVM Bottom-Side Copper SNVU514 – March 2016 Submit Documentation Feedback LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module Copyright © 2016, Texas Instruments Incorporated 9 PCB Layout www.ti.com Figure 16. LMZ34202EVM Bottom Solder Mask Figure 17. LMZ34202EVM Bottom-Side Component Layout 10 LMZ34202 SIMPLE SWITCHER® Power Module Evaluation Module Copyright © 2016, Texas Instruments Incorporated SNVU514 – March 2016 Submit Documentation Feedback STANDARD TERMS AND CONDITIONS FOR EVALUATION MODULES 1. Delivery: TI delivers TI evaluation boards, kits, or modules, including any accompanying demonstration software, components, or documentation (collectively, an “EVM” or “EVMs”) to the User (“User”) in accordance with the terms and conditions set forth herein. Acceptance of the EVM is expressly subject to the following terms and conditions. 1.1 EVMs are intended solely for product or software developers for use in a research and development setting to facilitate feasibility evaluation, experimentation, or scientific analysis of TI semiconductors products. EVMs have no direct function and are not finished products. EVMs shall not be directly or indirectly assembled as a part or subassembly in any finished product. For clarification, any software or software tools provided with the EVM (“Software”) shall not be subject to the terms and conditions set forth herein but rather shall be subject to the applicable terms and conditions that accompany such Software 1.2 EVMs are not intended for consumer or household use. EVMs may not be sold, sublicensed, leased, rented, loaned, assigned, or otherwise distributed for commercial purposes by Users, in whole or in part, or used in any finished product or production system. 2 Limited Warranty and Related Remedies/Disclaimers: 2.1 These terms and conditions do not apply to Software. The warranty, if any, for Software is covered in the applicable Software License Agreement. 2.2 TI warrants that the TI EVM will conform to TI's published specifications for ninety (90) days after the date TI delivers such EVM to User. Notwithstanding the foregoing, TI shall not be liable for any defects that are caused by neglect, misuse or mistreatment by an entity other than TI, including improper installation or testing, or for any EVMs that have been altered or modified in any way by an entity other than TI. Moreover, TI shall not be liable for any defects that result from User's design, specifications or instructions for such EVMs. Testing and other quality control techniques are used to the extent TI deems necessary or as mandated by government requirements. TI does not test all parameters of each EVM. 2.3 If any EVM fails to conform to the warranty set forth above, TI's sole liability shall be at its option to repair or replace such EVM, or credit User's account for such EVM. TI's liability under this warranty shall be limited to EVMs that are returned during 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 Regulatory Notices: 3.1 United States 3.1.1 Notice applicable to EVMs not FCC-Approved: 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. SPACER SPACER SPACER SPACER SPACER SPACER SPACER SPACER 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. 2. 3. 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, Use EVMs only after User obtains the license of Test Radio Station as provided in Radio Law of Japan with respect to EVMs, or 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. SPACER SPACER SPACER SPACER SPACER 【無線電波を送信する製品の開発キットをお使いになる際の注意事項】 開発キットの中には技術基準適合証明を受けて いないものがあります。 技術適合証明を受けていないもののご使用に際しては、電波法遵守のため、以下のいずれかの 措置を取っていただく必要がありますのでご注意ください。 1. 2. 3. 電波法施行規則第6条第1項第1号に基づく平成18年3月28日総務省告示第173号で定められた電波暗室等の試験設備でご使用 いただく。 実験局の免許を取得後ご使用いただく。 技術基準適合証明を取得後ご使用いただく。 なお、本製品は、上記の「ご使用にあたっての注意」を譲渡先、移転先に通知しない限り、譲渡、移転できないものとします。 上記を遵守頂けない場合は、電波法の罰則が適用される可能性があることをご留意ください。 日本テキサス・イ ンスツルメンツ株式会社 東京都新宿区西新宿６丁目２４番１号 西新宿三井ビル 3.3.3 Notice for EVMs for Power Line Communication: Please see http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page 電力線搬送波通信についての開発キットをお使いになる際の注意事項については、次のところをご覧くださ い。http://www.tij.co.jp/lsds/ti_ja/general/eStore/notice_02.page SPACER 4 EVM Use Restrictions and Warnings: 4.1 EVMS ARE NOT FOR USE IN FUNCTIONAL SAFETY AND/OR SAFETY CRITICAL EVALUATIONS, INCLUDING BUT NOT LIMITED TO EVALUATIONS OF LIFE SUPPORT APPLICATIONS. 4.2 User must read and apply the user guide and other available documentation provided by TI regarding the EVM prior to handling or using the EVM, including without limitation any warning or restriction notices. The notices contain important safety information related to, for example, temperatures and voltages. 4.3 Safety-Related Warnings and Restrictions: 4.3.1 User shall operate the EVM within TI’s recommended specifications and environmental considerations stated in the user guide, other available documentation provided by TI, and any other applicable requirements and employ reasonable and customary safeguards. Exceeding the specified performance ratings and specifications (including but not limited to input and output voltage, current, power, and environmental ranges) for the EVM may cause personal injury or death, or property damage. If there are questions concerning performance ratings and specifications, User should contact a TI field representative prior to connecting interface electronics including input power and intended loads. Any loads applied outside of the specified output range may also result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the EVM user guide prior to 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, current sense resistors, and heat sinks, which can be identified using the information in the associated documentation. When working with the EVM, please be aware that the EVM may become very warm. 4.3.2 EVMs are intended solely for use by technically qualified, professional electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems, and subsystems. User assumes all responsibility and liability for proper and safe handling and use of the EVM by User or its employees, affiliates, contractors or designees. User assumes all responsibility and liability to ensure that 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 responsibility and liability to determine whether the EVM is subject to any applicable international, federal, state, or local laws and regulations related to User’s handling and use of the EVM and, if applicable, User assumes all responsibility and liability for compliance in all respects with such laws and regulations. User assumes all responsibility and liability for proper disposal and recycling of the EVM consistent with all applicable international, federal, state, and local requirements. 5. Accuracy of Information: To the extent TI provides information on the availability and function of EVMs, TI attempts to be as accurate as possible. However, TI does not warrant the accuracy of EVM descriptions, EVM availability or other information on its websites as accurate, complete, reliable, current, or error-free. SPACER SPACER SPACER SPACER SPACER SPACER SPACER 6. Disclaimers: 6.1 EXCEPT AS SET FORTH ABOVE, EVMS AND ANY WRITTEN DESIGN MATERIALS PROVIDED WITH THE EVM (AND THE DESIGN OF THE EVM ITSELF) ARE PROVIDED "AS IS" AND "WITH ALL FAULTS." TI DISCLAIMS ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, REGARDING SUCH ITEMS, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT OF ANY THIRD PARTY PATENTS, COPYRIGHTS, TRADE SECRETS OR OTHER INTELLECTUAL PROPERTY RIGHTS. 6.2 EXCEPT FOR THE LIMITED RIGHT TO USE THE EVM SET FORTH HEREIN, NOTHING IN THESE TERMS AND CONDITIONS SHALL BE CONSTRUED AS GRANTING OR CONFERRING ANY RIGHTS BY LICENSE, PATENT, OR ANY OTHER INDUSTRIAL OR INTELLECTUAL PROPERTY RIGHT OF TI, ITS SUPPLIERS/LICENSORS OR ANY OTHER THIRD PARTY, TO USE THE EVM IN ANY FINISHED END-USER OR READY-TO-USE FINAL PRODUCT, OR FOR ANY INVENTION, DISCOVERY OR IMPROVEMENT MADE, CONCEIVED OR ACQUIRED PRIOR TO OR AFTER DELIVERY OF THE EVM. 7. USER'S INDEMNITY OBLIGATIONS AND REPRESENTATIONS. 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