LM5050MK-1EVAL/NOPB

User's Guide SNVA458A – April 2011 – Revised May 2013 AN-2087 LM5050-1EVAL Evaluation Board 1 Introduction The LM5050-1 evaluation board is designed to demonstrate the capabilities of the LM5050-1 OR-ing Diode Controller. One high side N-channel power MOSFET is used. The LM5050-1 evaluation board schematic is shown in Figure 5. The evaluation board is designed to highlight applications with a small solution size. For more information about LM5050-1 functional and electrical characteristics, refer to the LM5050-1High Side OR-ing FET Controller (SNVS629) data sheet. 2 Operating Range • • • • • Minimum Input Voltage, 6V Maximum Input Voltage, 50V Output Current Range: 0A to 15A Ambient Temperature Range 0°C to 50°C Board Size 1.50 inches x 2.25 inches The load current capability is limited at 15A by the ratings of the terminals and the PCB copper area and weight. The PCB layout has not been tested for currents above 15A, so this should only be done with some degree of caution. The maximum input voltage is limited by the breakdown voltage rating of both D1 and D2. Typical evaluation board performance and characteristics curves are shown in Figure 1 through Figure 2. The PCB layout is shown in Figure 7 and Figure 8. Test points are provided for optional control and signal monitoring. 3 Evaluation Board Start-Up Before applying power to the LM5050-1 evaluation board, all external connections should be verified. The external power supply must be turned off and connected with proper polarity to the VS, VIN, VOUT, and GND terminals. Under basic evaluation conditions the Off test point is left open. The evaluation board will be in the normal operating mode when power is applied. The Off terminal is used only when there is a desire to disable normal operation. All trademarks are the property of their respective owners. SNVA458A – April 2011 – Revised May 2013 Submit Documentation Feedback AN-2087 LM5050-1EVAL Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated 1 Inductive Kick-Back Protection www.ti.com Figure 1. Forward Waveforms 4 Figure 2. Reverse Waveforms Inductive Kick-Back Protection Diode D1 and capacitor C1 (as do diode D2 and capacitor C2) serve as inductive kick-back protection to limit negative transient voltage spikes generated on the input when the input supply voltage is abruptly taken to zero volts. 5 Off Test Point The Off test point provided on the LM5050-1 evaluation board is used to control the LM5050-1 operation. The Off test point is connected directly to the LM5050-1 OFF pin. See the LM5050-1High Side OR-ing FET Controller (SNVS629) data sheet for more details. To enable the LM5050-1 apply a voltage less than 0.8V to the Off test point, connect the Off test point to GND, or leave the Off test point open (default). If the Off test point is left open, the LM5050-1 OFF pin internal pull-down will ensure that the LM5050-1 becomes operational. To disable the LM5050-1 apply a voltage greater than 2.0V to the Off test point. 2 1 GND 2 OFF 3 LM5050MK-1 Figure 3. OFF pin vs GATE VS 6 OUT 5 GATE 4 IN Figure 4. Connection Diagram AN-2087 LM5050-1EVAL Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated SNVA458A – April 2011 – Revised May 2013 Submit Documentation Feedback Off Test Point www.ti.com Vext J1 n/a GND Q1 VOUT VIN R2 n/a C1 1.0 PF 100V R1 100 D1 + OUT GATE IN C2 22 PF 100V VS LM5050-1 C3 0.1 PF 100V OFF Off x x x xx x xx x x x x xx x xx x GND Figure 5. Schematic Diagram GND Vext Off J1 R2 U1 C3 Q1 D1 GND D2 GND C2 x LM5050-1 Evaluation Board x x SNVA458A – April 2011 – Revised May 2013 Submit Documentation Feedback VOUT x R1 x C1 x x x xx x xx x x x x xx x xx x GND GND VIN D2 TVS 60V Figure 6. Component Placement AN-2087 LM5050-1EVAL Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated 3 Off Test Point www.ti.com Figure 7. Evaluation Board, Top Side (Component) Figure 8. Evaluation Board, Bottom Side 4 AN-2087 LM5050-1EVAL Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated SNVA458A – April 2011 – Revised May 2013 Submit Documentation Feedback Bill of Materials www.ti.com 6 Bill of Materials ID Description Manufacturer Mfgr Part Number U1 IC; Ideal OR-ing Diode Controller Texas Instruments LM5050 C1 Capacitor: MLCC; 1.0µF; ±10%; 100V; X7R; 1825 Vishay/Vitramon VJ1825Y105KBBAT4X C2 Capacitor: 22 µF; ±20%; 100V; Aluminum Electrolytic; SMT Panasonic/ECG EEE-HA2A220P C3 Capacitor: 0.1 µF; MLCC; ±10%; 100V; X7R; 1210 Murata Electronics North America GRM32NR72A104KA01L D1 Diode: Schottky Barrier Rectifier; 1A: 60V; SMA ON Semiconductor SS16T3G Micro Commercial Components SS16-TP D2 Diode: TVS; Unidirectional; 600W; 60V; SMB Diodes Inc SMBJ60A-13-F J1 Not Installed - - Q1 MOSFET: N-Channel; 100V; 40A; 0.025Ω; D2PAK Vishay/Siliconix SUM40N10-30-E3 R1 Resistor: 100Ω; 0.10W; ±1%; 100ppm; Thick Film; 0603 Vishay/Dale CRCW0603100RFKEA ROHM Semiconductor MCR03EZPFX1000 R2 Not Installed - - Terminal: 6-32 Screw; Vertical; Snap-In PCB Mount; 15A Keystone Electronics 7693 Test Point Terminal: 0.040in Dia Mtg Hole; White Keystone Electronics 5012 VIN VOUT GND GND Off GND GND SNVA458A – April 2011 – Revised May 2013 Submit Documentation Feedback AN-2087 LM5050-1EVAL Evaluation Board Copyright © 2011–2013, Texas Instruments Incorporated 5 IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete. All semiconductor products (also referred to herein as “components”) are sold subject to TI’s terms and conditions of sale supplied at the time of order acknowledgment. TI warrants performance of its components to the specifications applicable at the time of sale, in accordance with the warranty in TI’s terms and conditions of sale of semiconductor products. Testing and other quality control techniques are used to the extent TI deems necessary to support this warranty. Except where mandated by applicable law, testing of all parameters of each component is not necessarily performed. TI assumes no liability for applications assistance or the design of Buyers’ products. Buyers are responsible for their products and applications using TI components. To minimize the risks associated with Buyers’ products and applications, Buyers should provide adequate design and operating safeguards. TI does not warrant or represent that any license, either express or implied, is granted under any patent right, copyright, mask work right, or other intellectual property right relating to any combination, machine, or process in which TI components or services are used. Information published by TI regarding third-party products or services does not constitute a license to use such products or services or a warranty or endorsement thereof. Use of such information may require a license from a third party under the patents or other intellectual property of the third party, or a license from TI under the patents or other intellectual property of TI. Reproduction of significant portions of TI information in TI data books or data sheets is permissible only if reproduction is without alteration and is accompanied by all associated warranties, conditions, limitations, and notices. TI is not responsible or liable for such altered documentation. Information of third parties may be subject to additional restrictions. Resale of TI components or services with statements different from or beyond the parameters stated by TI for that component or service voids all express and any implied warranties for the associated TI component or service and is an unfair and deceptive business practice. TI is not responsible or liable for any such statements. Buyer acknowledges and agrees that it is solely responsible 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 failures, monitor failures and their consequences, lessen the likelihood of failures that might cause harm and take appropriate remedial actions. Buyer will fully indemnify TI and its representatives against any damages arising out of the use of any TI components in safety-critical applications. In some cases, TI components may be promoted specifically to facilitate safety-related applications. With such components, TI’s goal is to help enable customers to design and create their own end-product solutions that meet applicable functional safety standards and requirements. Nonetheless, such components are subject to these terms. No TI components are authorized for use in FDA Class III (or similar life-critical medical equipment) unless authorized officers of the parties have executed a special agreement specifically governing such use. Only those TI components which TI has specifically designated as military grade or “enhanced plastic” are designed and intended for use in military/aerospace applications or environments. Buyer acknowledges and agrees that any military or aerospace use of TI components which have not been so designated is solely at the Buyer's risk, and that Buyer is solely responsible for compliance with all legal and regulatory requirements in connection with such use. TI has specifically designated certain components as meeting ISO/TS16949 requirements, mainly for automotive use. In any case of use of non-designated products, TI will not be responsible for any failure to meet ISO/TS16949. Products Applications Audio www.ti.com/audio Automotive and Transportation www.ti.com/automotive Amplifiers amplifier.ti.com Communications and Telecom www.ti.com/communications Data Converters dataconverter.ti.com Computers and Peripherals www.ti.com/computers DLP® Products www.dlp.com Consumer Electronics www.ti.com/consumer-apps DSP dsp.ti.com Energy and Lighting www.ti.com/energy Clocks and Timers www.ti.com/clocks Industrial www.ti.com/industrial Interface interface.ti.com Medical www.ti.com/medical Logic logic.ti.com Security www.ti.com/security Power Mgmt power.ti.com Space, Avionics and Defense www.ti.com/space-avionics-defense Microcontrollers microcontroller.ti.com Video and Imaging www.ti.com/video RFID www.ti-rfid.com OMAP Applications Processors www.ti.com/omap TI E2E Community e2e.ti.com Wireless Connectivity www.ti.com/wirelessconnectivity Mailing Address: Texas Instruments, Post Office Box 655303, Dallas, Texas 75265 Copyright © 2013, Texas Instruments Incorporated