LM5000EVAL

User's Guide SNVU452 – July 2014 LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide The LM5000EVAL evaluation module (EVM) provides the design engineer with a fully functional nonisolated flyback converter to evaluate the LM5000-3 high-voltage switch-mode regulator integrated circuit (IC). The EVM provides 3.3-V output with 2-A current capability. The input voltage range is from 20 V to 55 V. This user's guide contains the electrical specification, quick setup procedure, performance curves, application schematic, and bill of materials (BOM). 1 2 3 4 5 6 Contents Introduction ................................................................................................................... Test Setup .................................................................................................................... 2.1 Connectors and Test Points Description......................................................................... 2.2 Quick Setup Procedure ............................................................................................ Performance Curves ........................................................................................................ Schematic ..................................................................................................................... Layout ......................................................................................................................... Bill of Materials ............................................................................................................... 2 2 2 2 3 5 6 7 List of Figures 1 Efficiency with Respect to Load Current .................................................................................. 3 2 Turn-On Waveforms (VIN = 36 V, IOUT = 2 A).......................................................................... 3 3 Output Voltage Ripple (VIN = 36 V, IOUT = 2 A)........................................................................ 4 4 Load Transient Response (VIN = 36 V) 5 6 7 8 .................................................................................. Non-Isolated Flyback Converter Schematic .............................................................................. Top Silkscreen ............................................................................................................... Top Layer ..................................................................................................................... Bottom Layer ................................................................................................................. 4 5 6 6 6 List of Tables 1 2 3 ............................................................................................... Connectors and Test Points ................................................................................................ LM5000EVAL EVM Bill of Materials ....................................................................................... Key Electrical Specifications SNVU452 – July 2014 Submit Documentation Feedback LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide Copyright © 2014, Texas Instruments Incorporated 2 2 7 1 Introduction 1 www.ti.com Introduction The LM5000-3 is a monolithic IC specifically designed and optimized for flyback, boost, and SEPIC power converter applications. It has an internal power switch rated for a maximum of 80 V, with a current limit set to 2 A (typical). The LM5000-3 switching frequency is pin selectable for either 300 kHz (FS grounded) or 700 kHz (FS open). This EVM is designed to demonstrate a non-isolated flyback converter operating with 300 kHz of switching frequency. Table 1 contains the electrical specifications. Table 1. Key Electrical Specifications EVM Input Voltage Range Output Voltage Output Current Range LM5000EVAL 20 V to 55 V 3.3 V 0 A to 2 A 2 Test Setup 2.1 Connectors and Test Points Description Table 2 shows the I/O connectors and test points included in this EVM. A power supply capable of supplying at least 1 A must be connected to input connectors IN and GND1. The load must be connected to output connectors OUT and GND2. The maximum load current capability must be at least 2 A. Test point SD provides a connection to monitor shutdown control signal with GND1 as the ground reference. Table 2. Connectors and Test Points 2.2 Reference Designator Description IN Input voltage connection and test point GND1 Input voltage return connection and test point OUT Output voltage connection and test point GND2 Output voltage return connection and test point SD Shutdown control input pin test point Quick Setup Procedure The following steps provide the quick setup procedures: Step 1. Set the power supply current limit to 1 A. Turn off the power supply. Connect the positive output of the power supply to IN and the negative output to GND1. Step 2. Connect the load to OUT for the positive connection and GND2 for the negative connection. Step 3. Set the power supply voltage to 20 V and the load to 0.1 A. The electronic load voltage should be in regulation with a nominal 3.3-V output. Step 4. Slowly increase the load while monitoring the output voltage between OUT and GND2. It should remain in regulation with a nominal 3.3-V output as the load is increased up to 2 A. Step 5. Slowly sweep the input voltage from 20 V to 55 V. The output voltage should remain in regulation with a nominal 3.3-V output. Step 6. Turn off the load, and decrease the input voltage down to 0 V to shut down the flyback converter, and then turn on the load to discharge the output capacitors. 2 LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide Copyright © 2014, Texas Instruments Incorporated SNVU452 – July 2014 Submit Documentation Feedback Performance Curves www.ti.com 3 Performance Curves Figure 1 to Figure 4 illustrate the performance curves for the EVM. Figure 1. Efficiency with Respect to Load Current Figure 2. Turn-On Waveforms (VIN = 36 V, IOUT = 2 A) SNVU452 – July 2014 Submit Documentation Feedback LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide Copyright © 2014, Texas Instruments Incorporated 3 Performance Curves www.ti.com Figure 3. Output Voltage Ripple (VIN = 36 V, IOUT = 2 A) Figure 4. Load Transient Response (VIN = 36 V) 4 LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide Copyright © 2014, Texas Instruments Incorporated SNVU452 – July 2014 Submit Documentation Feedback Schematic www.ti.com 4 Schematic Figure 5 shows the LM5000EVAL EVM schematic. Figure 5. Non-Isolated Flyback Converter Schematic SNVU452 – July 2014 Submit Documentation Feedback LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide Copyright © 2014, Texas Instruments Incorporated 5 Layout 5 www.ti.com Layout The printed-circuit board layout for the LM5000EVAL is shown in Figure 6 through Figure 8. Figure 6. Top Silkscreen Figure 7. Top Layer Figure 8. Bottom Layer 6 LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide Copyright © 2014, Texas Instruments Incorporated SNVU452 – July 2014 Submit Documentation Feedback Bill of Materials www.ti.com 6 Bill of Materials Table 3 presents the BOM for the LM5000EVAL EVM. Table 3. LM5000EVAL EVM Bill of Materials Part Number Description Value C Item 1 C4532X7R2A105MT Capacitor, CER, TDK 1 µF, 100 V C 2 C4532X7R2A105MT Capacitor, CER, TDK 1 µF, 100 V C 3 C1206C224K5RAC Capacitor, CER, KEMET 0.22 µF, 50 V C 4 C1206C104K5RAC Capacitor, CER, KEMET 0.1 µF, 50 V C 5 C1206C104K5RAC Capacitor, CER, KEMET 0.1 µF, 50 V C 6 C1206C101K1GAC Capacitor, CER, KEMET 100 pF, 100 V C 7 C1206C104K5RAC Capacitor, CER, KEMET 0.1 µF, 50 V C 8 C4532X7S0G686M Capacitor, CER, TDK 68 µF, 4 V C 9 C4532X7S0G686M Capacitor, CER, TDK 68 µF, 4 V C 10 C1206C221K1GAC Capacitor, CER, KEMET 220 pF, 100 V C 11 C1206C102K5RAC Capacitor, CER, KEMET 1000 pF, 500 V D 1 BZX84C10-NSA Central, 10 V Zener, SOT-23 D 2 CMZ5930B-NSA Central, 16 V Zener, SMA D 3 CMPD914-NSA Central, Switching, SOT-23 D 4 CMPD914-NSA Central, Switching, SOT-23 D 5 CMSH3-40L-NSA Central, Schottky, SMC T 1 A0009-A Coilcraft, Transformer R 1 CRCW12064992F Resistor R 2 CRCW12061001F Resistor 1 kΩ R 3 CRCW12061002F Resistor 10 kΩ R 4 CRCW12066191F Resistor 6.19 kΩ R 5 CRCW120610R0F Resistor 10 Ω R 6 CRCW12062003F Resistor 200 kΩ R 7 CRCW12061002F Resistor 10 kΩ Q 1 CXT5551-NSA Central, NPN, 180 V U 1 LM5000-3 Regulator, TI SNVU452 – July 2014 Submit Documentation Feedback 49.9 kΩ LM5000EVAL Non-Isolated Flyback Evaluation Module User’s Guide Copyright © 2014, Texas Instruments Incorporated 7 ADDITIONAL TERMS AND CONDITIONS, WARNINGS, RESTRICTIONS, AND DISCLAIMERS FOR EVALUATION MODULES Texas Instruments Incorporated (TI) markets, sells, and loans all evaluation boards, kits, and/or modules (EVMs) pursuant to, and user expressly acknowledges, represents, and agrees, and takes sole responsibility and risk with respect to, the following: 1. User agrees and acknowledges that EVMs are intended to be handled and used for feasibility evaluation only in laboratory and/or development environments. Notwithstanding the foregoing, in certain instances, TI makes certain EVMs available to users that do not handle and use EVMs solely for feasibility evaluation only in laboratory and/or development environments, but may use EVMs in a hobbyist environment. All EVMs made available to hobbyist users are FCC certified, as applicable. Hobbyist users acknowledge, agree, and shall comply with all applicable terms, conditions, warnings, and restrictions in this document and are subject to the disclaimer and indemnity provisions included in this document. 2. Unless otherwise indicated, EVMs are not finished products and not intended for consumer use. EVMs are intended solely for use by technically qualified electronics experts who are familiar with the dangers and application risks associated with handling electrical mechanical components, systems, and subsystems. 3. User agrees that EVMs shall not be used as, or incorporated into, all or any part of a finished product. 4. User agrees and acknowledges that certain EVMs may not be designed or manufactured by TI. 5. User must read the user's guide and all other documentation accompanying EVMs, including without limitation any warning or restriction notices, prior to handling and/or using EVMs. Such notices contain important safety information related to, for example, temperatures and voltages. For additional information on TI's environmental and/or safety programs, please visit www.ti.com/esh or contact TI. 6. User assumes all responsibility, obligation, and any corresponding liability for proper and safe handling and use of EVMs. 7. Should any EVM not meet the specifications indicated in the user’s guide or other documentation accompanying such EVM, the EVM may be returned to TI within 30 days from the date of delivery for a full refund. THE FOREGOING LIMITED WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY TI TO USER AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR PURPOSE. TI SHALL NOT BE LIABLE TO USER FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES RELATED TO THE HANDLING OR USE OF ANY EVM. 8. No license is granted under any patent right or other intellectual property right of TI covering or relating to any machine, process, or combination in which EVMs might be or are used. TI currently deals with a variety of customers, and therefore TI’s arrangement with the user is not exclusive. TI assumes no liability for applications assistance, customer product design, software performance, or infringement of patents or services with respect to the handling or use of EVMs. 9. User assumes sole responsibility to determine whether EVMs may be subject to any applicable federal, state, or local laws and regulatory requirements (including but not limited to U.S. Food and Drug Administration regulations, if applicable) related to its handling and use of EVMs and, if applicable, compliance in all respects with such laws and regulations. 10. User has sole responsibility to ensure the safety of any activities to be conducted by it and its employees, affiliates, contractors or designees, with respect to handling and using EVMs. Further, user is responsible to ensure that any interfaces (electronic and/or mechanical) between EVMs 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. 11. User shall employ reasonable safeguards to ensure that user’s use of EVMs will not result in any property damage, injury or death, even if EVMs should fail to perform as described or expected. 12. User shall be solely responsible for proper disposal and recycling of EVMs consistent with all applicable federal, state, and local requirements. Certain Instructions. User shall operate EVMs within TI’s recommended specifications and environmental considerations per the user’s guide, accompanying documentation, and any other applicable requirements. Exceeding the specified ratings (including but not limited to input and output voltage, current, power, and environmental ranges) for EVMs may cause property damage, personal injury or death. If there are questions concerning these ratings, 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 result in unintended and/or inaccurate operation and/or possible permanent damage to the EVM and/or interface electronics. Please consult the applicable EVM user's 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, some circuit components may have case temperatures greater than 60°C as long as the input and output are maintained at a normal ambient operating temperature. These components include but are not limited to linear regulators, switching transistors, pass transistors, and current sense resistors which can be identified using EVMs’ schematics located in the applicable EVM user's guide. When placing measurement probes near EVMs during normal operation, please be aware that EVMs may become very warm. As with all electronic evaluation tools, only qualified personnel knowledgeable in electronic measurement and diagnostics normally found in development environments should use EVMs. Agreement to Defend, Indemnify and Hold Harmless. User agrees to defend, indemnify, and hold TI, its directors, officers, employees, agents, representatives, affiliates, licensors and their representatives harmless from and against any and all claims, damages, losses, expenses, costs and liabilities (collectively, "Claims") arising out of, or in connection with, any handling and/or use of EVMs. User’s indemnity shall apply whether Claims arise under law of tort or contract or any other legal theory, and even if EVMs fail to perform as described or expected. Safety-Critical or Life-Critical Applications. If user intends to use EVMs in evaluations of safety critical applications (such as life support), and a failure of a TI product considered for purchase by user for use in user’s product would reasonably be expected to cause severe personal injury or death such as devices which are classified as FDA Class III or similar classification, then user must specifically notify TI of such intent and enter into a separate Assurance and Indemnity Agreement. RADIO FREQUENCY REGULATORY COMPLIANCE INFORMATION FOR EVALUATION MODULES Texas Instruments Incorporated (TI) evaluation boards, kits, and/or modules (EVMs) and/or accompanying hardware that is marketed, sold, or loaned to users may or may not be subject to radio frequency regulations in specific countries. General Statement for EVMs Not Including a Radio For EVMs not including a radio and not subject to the U.S. Federal Communications Commission (FCC) or Industry Canada (IC) regulations, TI intends EVMs to be used only for engineering development, demonstration, or evaluation purposes. EVMs are not finished products typically fit for general consumer use. EVMs may nonetheless generate, use, or radiate radio frequency energy, but have not been tested for compliance with the limits of computing devices pursuant to part 15 of FCC or the ICES-003 rules. Operation of such EVMs may cause interference with radio communications, in which case the user at his own expense will be required to take whatever measures may be required to correct this interference. General Statement for EVMs including a radio User Power/Frequency Use Obligations: For EVMs including a radio, the radio included in such EVMs is intended for development and/or professional use only in legally allocated frequency and power limits. Any use of radio frequencies and/or power availability in such EVMs and their development application(s) must comply with local laws governing radio spectrum allocation and power limits for such EVMs. It is the user’s sole responsibility to only operate this radio in legally acceptable frequency space and within legally mandated power limitations. Any exceptions to this are strictly prohibited and unauthorized by TI unless user has obtained appropriate experimental and/or development licenses from local regulatory authorities, which is the sole responsibility of the user, including its acceptable authorization. U.S. Federal Communications Commission Compliance 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 could void the user's authority to operate the equipment. FCC Interference Statement for Class A EVM devices 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 its own expense. FCC Interference Statement for Class B EVM devices 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. Industry Canada Compliance (English) For EVMs Annotated as IC – INDUSTRY CANADA Compliant: This Class A or B digital apparatus complies with Canadian ICES-003. Changes or modifications not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Concerning EVMs Including Radio Transmitters This device complies with Industry Canada licence-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. 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. Canada Industry Canada Compliance (French) Cet appareil numérique de la classe A ou B est conforme à la norme NMB-003 du Canada Les changements ou les modifications pas expressément approuvés par la partie responsable de la conformité ont pu vider l’autorité de l'utilisateur pour actionner l'équipement. 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. 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. 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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. 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