EVAL-ADM1073MEBZ User Guide UG-555 One Technology Way • P.O. Box 9106 • Norwood, MA 02062-9106, U.S.A. • Tel: 781.329.4700 • Fax: 781.461.3113 • www.analog.com Using the ADM1073 Hot Swap Controller Evaluation Kit FEATURES to dissipate heat for some of the key components on the power path, allowing evaluation of high current hot swap setups. Evaluation kit for the ADM1073 hot swap controller External FET to control load current Programmable current limit (default 6 A) Programmable operating voltage range (UV/OV resistors) SOA timing values using external TIMER capacitor LEDs on all logic inputs and outputs Push-buttons for asserting logic inputs Drops into a user’s system, replacing the current hot swap device One sense resistor footprint and one FET footprint provides users with flexibility and allows them to simulate a wide range of application setups. Multiple test points allow easy access to all critical points and pins. There is one LED to provide users with a direct visual indication of IC power good output. This evaluation kit allows the ADM1073 negative-voltage hot swap controller to be easily evaluated. The ADM1073 provides undervoltage and overvoltage protection by monitoring the supply voltage and provides robust current limiting by monitoring the load current. The device uses an FET in the power path to control the load current. EVALUATION KIT CONTENTS EVAL-ADM1073MEBZ evaluation board EVAL-ADM1073MEBZ user guide GENERAL DESCRIPTION Complete specifications for the ADM1073 can be found in the ADM1073 data sheet, available at www.analog.com, and should be consulted in conjunction with this user guide when using the evaluation board The EVAL-ADM1073MEBZ is a compact, full feature evaluation board for the ADM1073 device. The layout provides users with a clear visual of all the peripheral components and the hot swap power path. The layout also maximizes the ability of the board 11494-007 PHOTOGRAPH OF THE EVALUATION BOARD Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | Page 1 of 8 UG-555 EVAL-ADM1073MEBZ User Guide TABLE OF CONTENTS Features .............................................................................................. 1 Integrating the Evaluation Board into the System ....................5 Evaluation Kit Contents ................................................................... 1 Load Capacitance ..........................................................................5 General Description ......................................................................... 1 Evaluation Board Hardware .............................................................6 Photograph of the Evaluation Board .............................................. 1 Switch, Jumper, and LED Functions ...........................................6 Revision History ............................................................................... 2 Evaluation Board Schematics...........................................................7 Important Safety Information ......................................................... 3 Bill of Materials ..................................................................................8 Evaluation Board Description......................................................... 4 EVAL-ADM1073MEBZ ...............................................................8 Evaluation Board Configuration ................................................ 4 REVISION HISTORY 5/13—Revision 0: Initial Version Rev. 0 | Page 2 of 8 EVAL-ADM1073MEBZ User Guide UG-555 IMPORTANT SAFETY INFORMATION Take the following precautions when using the EVALADM1073MEBZ evaluation kit under high voltage conditions: • • • • • • Do not work alone. Always check the grounding when working with negative voltages. Always keep one hand in your pocket or behind your back when around a high voltage system. Wear footwear with a rubber sole if possible. Wear eye protection (safety goggles). Do not wear any jewelry or other articles that could accidentally contact circuitry and conduct current. • • • • • Rev. 0 | Page 3 of 8 Set up your work area away from possible grounds that you might accidentally contact. With the power off and the equipment unplugged, connect/ disconnect any test leads. Use clip leads or solder temporary wires to reach locations that are difficult to access. Perform as many tests as possible with the power off and the equipment unplugged. After performing tests that require the power to be turned on, turn off the power and disconnect the power supply from the board. Fully discharge large load capacitors with an appropriate resistor. UG-555 EVAL-ADM1073MEBZ User Guide EVALUATION BOARD DESCRIPTION RDROP VIN R1 R2 OV GATE UV SENSE TIMER SS –48VRTN J1-1 –48VOUT DRAIN R1 R2 J1-2 2. Choose values for Resistors R1 to R4 to suit the desired operating voltage range and hysteresis levels. The default resistors values (R1 = 200 kΩ, R2 = 5.1 kΩ, R3 = 200 kΩ, R4 = 5.36 kΩ) give an operating range of ~34.9 V to ~74.0 V with hysteresis levels of ~1 V on the UV and OV pins. See the ADM1073 data sheet for other resistor ratios and their operating ranges. Note that resistors that are accurate to within ±1% should be used for optimum accuracy. 3. Choose the maximum load current that is permitted before the ADM1073 registers a current fault. This is determined by the choice of sense resistor, RSENSE. The evaluation board has a 15 mΩ sense resistor by default, which sets up a maximum inrush current level of 6.8 A and a circuit breaker level between 5.7 A and 6.5 A (~6 A typical). RSENSE can be changed to alter the load current level. See the ADM1073 data sheet for details. Note that resistors that are accurate to within ±1% should be used for optimum accuracy. 4. Choose a value for the soft start capacitor, CSS. This capacitor is connected between the SS and VEE pins. It adjusts the soft start current profile when the FET is enabled. Capacitors of various values can be soldered in this location. See the ADM1073 data sheet for details. The default value of this capacitor is 0.82 nF, which results in a soft start time of ~400 µs. 5. Choose values for the TIMER capacitor, CTIMER, and the TIMER resistor, RTIMER. These components set the on-time of the limited consecutive retry scheme. Capacitors and resistors of various values can be soldered in this location. See the ADM1073 data sheet for details. For the MOSFET used on the board, the default value for the capacitor is 22 nF. This gives a maximum timer of ~3 ms and a minimum timer of ~1.1 ms. This timer depends on the VDS of the MOSFET; however, CSS and RDRAIN also affect this parameter. For example, RESTART SHDN The EVAL-ADM1073MEBZ is designed to demonstrate several features of the ADM1073. It can be used to drop onto a plug-in module or a backplane, replacing the current hot swap device. A simplified drawing of the evaluation board is shown in Figure 2. Q1 RSENSE ADM1073 VEE RTIMER J1-3 –48VIN 11494-003 LATCHED PWRGD CSS SPLYGD CTIMER Figure 2. Evaluation Board Functional Block Diagram The ADM1073 evaluation board consists of the following: • • • • • • • On-board FET to control load current Programmable operating voltage range (R1 to R4 resistors) Programmable current-limit levels (value of RSENSE) Programmable soft start ramp (Capacitor C2) Programmable TIMER on-time (Capacitor C1) LEDs on all logic I/Os Push-button switches for asserting logic inputs By cutting various tracks around the current hot swap device in a user system and soldering the ADM1073 evaluation board in position above it, the ADM1073 and its external components can be integrated into the system in place of the original hot swap circuitry. This allows the user to evaluate the performance of the ADM1073 in the system. • • • • EVALUATION BOARD CONFIGURATION You can set up the ADM1073 evaluation board in various configurations, as follows: 1. Choose a shunt resistor. A default RDROP of 39 kΩ is mounted on the ADM1073 evaluation board. A constant voltage of 12.3 V (above VEE) is generated at the VIN pin. This resistor dissipates a maximum of 125 mW at 75 V and allows a minimum power supply of 35 V to be used for operation. if VDS = 75 V, then t = 1.1 ms if VDS = 48 V, then t = 1.5 ms if VDS = 35 V, then t = 1.7 ms if VDS = 0 V, then t = 3 ms 6. The default value of the drain resistor is 2 MΩ. This ensures that the maximum drain current of 36 µA is not exceeded while maintaining optimum foldback. 7. The ADM1073 evaluation board has an IPP075N15N3 D2PAK FET mounted by default. If you want to change this FET, remove the component, Q1, and mount a replacement. The footprint can accommodate DPAK and D2PAK packages. Rev. 0 | Page 4 of 8 EVAL-ADM1073MEBZ User Guide UG-555 INTEGRATING THE EVALUATION BOARD INTO THE SYSTEM LOAD CAPACITANCE The current system must be modified to disconnect or remove the existing hot swap circuitry and replace it with the ADM1073 evaluation board. The following steps describe a situation in which the hot swap circuitry resides on a plug-in module. The same method applies when a hot swap system is implemented on the backplane side. 1. Locate the existing hot swap device and its accompanying components, and disconnect this portion of the system by cutting the relevant tracks on the board. Alternatively, you can desolder and remove the relevant components, as shown in Figure 3. The ADM1073 can accommodate a limited multiple retry scheme to charge up larger load capacitance while keeping the FET within the programmed safe operating area (SOA) limits. There is a maximum of seven attempts allowed. Table 1 can be used as a guide for nominal load capacitance limits for this particular design. Table 1. Nominal Load Capacitance Limits 1 VIN (V) 48 48 75 75 Number of Attempts 1 7 1 7 ~Maximum CLOAD (µF) 250 1800 150 1000 CUT 1 PLUG-IN BOARD Excluding tolerances and assuming no dc load current enabled during power-up. 0V HOT SWAP SYSTEM LIVE BACKPLANE LOAD 11494-004 –48V CUT Figure 3. Removing Existing Hot Swap Circuitry from the System 2. To integrate the ADM1073 evaluation board into your system in place of the original hot swap circuitry, clamp three wires into the J1 terminal block of the ADM1073 evaluation board and solder them into position on the board. If you need to access the logic I/Os, there are blank pads on the board that can be used for this purpose. The ADM1073 evaluation board now acts as a substitute for the old hot swap circuitry, as shown in Figure 4. SOLDER LIVE BACKPLANE –48V PLUG-IN BOARD 0V –48V IN –48V OUT TERMINAL BLOCK ADM1073 EVALUATION BOARD SOLDER LOAD 11494-005 0V Figure 4. Integrating the ADM1073 Evaluation Board into the System The ADM1073 evaluation board has an insulating coating on its underside to protect the system. If the underside of the board were not protected, shorts could occur on the module or backplane below it. Rev. 0 | Page 5 of 8 UG-555 EVAL-ADM1073MEBZ User Guide EVALUATION BOARD HARDWARE SWITCH, JUMPER, AND LED FUNCTIONS EVAL-ADM1073MEBZ Table 2. Connector Functions Connector −48VRTN, −48VIN −48VOUT Description Hot swap line voltage inputs that also power the board components. The input voltage ranges from −18 V to −75 V. Hot swap line voltage output. Table 3. Switch Functions Switch S1 S2 Description Push-button for shutdown. Push-button for restart. Table 4. LED Functions LED D1 D2 D3 D4 D5 Description SPLYGD, green. PWRGD, green. LATCHED, red. RESTART, yellow. SHDN, yellow. Table 5. On-Board ICs IC U1 Description ADM1073 main IC. Rev. 0 | Page 6 of 8 EVAL-ADM1073MEBZ User Guide UG-555 EVALUATION BOARD SCHEMATICS J1-2 –48VRTN R6 R3 R1 RDROP C3 SPLYGD PWRGD LATCHED R11 D1 R8 D2 R9 D3 R10 VIN R5 R12 R14 D5 2 R15 SHDN D4 R16 RESTART ADM1073 11 OV DRAIN 10 J1-1 –48VOUT R13 Q1 GATE 9 12 UV SENSE 5 VEE 6 13 TIMER RSENSE S1 SHDN 14 S2 RESTART 1 LATCHED 8 3 7 LATCHED C1 C2 PWRGD R4 R2 R7 PWRGD D6 SPLYGD D8 SPLYGD 4 SS SHDN RESTART J2-1 SPLYGD J2-2 PWRGD J2-3 LATCHED J3-1 SHDN J3-2 RESTART 11494-006 J1-3 –48VIN Figure 5. EVAL-ADM1073MEBZ Evaluation Board Circuit Diagram Rev. 0 | Page 7 of 8 UG-555 EVAL-ADM1073MEBZ User Guide BILL OF MATERIALS EVAL-ADM1073MEBZ Table 2. Bill of Materials Qty 1 1 1 1 2 1 1 4 1 1 5 1 1 1 1 2 2 1 1 1 2 1 1 1 Reference Designator U1 C1 C2 C3 R1, R3 R2 R4 R5, R14, R15, R16 R6 R7 R8 to R12 R13 RDROP RSENSE Q1 D4, D5 D1, D2 D3 D6 D8 S1, S2 J1 J2 J3 Part Type Hot swap controller Capacitor (CTIMER nom) Capacitor (CSS nom) Capacitor Resistor Resistor Resistor Resistor Resistor Resistor (RTIMER nom) Resistor Resistor (RDRAIN) Resistor (RSHUNTNOM) Resistor FET LED LED LED TVS diode Zener diode SW-PUSH-SMD Connector/power Connector/power Connector/power Value 22 nF 0.82 nF 100 nF 200 kΩ 5.1 kΩ 5.36 kΩ 24 kΩ 0Ω 470 Ω 2 MΩ 39 kΩ 15 mΩ 7.2 mΩ 85 V Part Decal 14-lead TSSOP 0603 0603 0603 0805 0805 0805 1206 0805 0805 0805 1206 1206 D2PAK LED SMT yellow LED SMT green LED SMT red SMC 3-pin SOT23 Push-button switch 3-way terminal block 3-way terminal block 2-way terminal block Part No. ADM1073ARUZ 881-9998 175-9086 182-8899 165-2950 146-9937 2305132 184-1781 9333681 Do not insert 923-3962 150-6150 923-6910 WSLP1206R0150FEA IPP075N15N3 G 121-2751 122-6375 122-6394 SMCJ85A-FDICT-ND 984-4392 112-3624 151-786 Do not insert Do not insert Source Analog Devices, Inc. Farnell Farnell Farnell Farnell Farnell Farnell Farnell Farnell Farnell Farnell Farnell Vishay Infineon Farnell Farnell Farnell Digi-Key Farnell Farnell Farnell ESD Caution ESD (electrostatic discharge) sensitive device. Charged devices and circuit boards can discharge without detection. Although this product features patented or proprietary protection circuitry, damage may occur on devices subjected to high energy ESD. Therefore, proper ESD precautions should be taken to avoid performance degradation or loss of functionality. Legal Terms and Conditions By using the evaluation board discussed herein (together with any tools, components documentation or support materials, the “Evaluation Board”), you are agreeing to be bound by the terms and conditions set forth below (“Agreement”) unless you have purchased the Evaluation Board, in which case the Analog Devices Standard Terms and Conditions of Sale shall govern. Do not use the Evaluation Board until you have read and agreed to the Agreement. Your use of the Evaluation Board shall signify your acceptance of the Agreement. This Agreement is made by and between you (“Customer”) and Analog Devices, Inc. (“ADI”), with its principal place of business at One Technology Way, Norwood, MA 02062, USA. Subject to the terms and conditions of the Agreement, ADI hereby grants to Customer a free, limited, personal, temporary, non-exclusive, non-sublicensable, non-transferable license to use the Evaluation Board FOR EVALUATION PURPOSES ONLY. Customer understands and agrees that the Evaluation Board is provided for the sole and exclusive purpose referenced above, and agrees not to use the Evaluation Board for any other purpose. Furthermore, the license granted is expressly made subject to the following additional limitations: Customer shall not (i) rent, lease, display, sell, transfer, assign, sublicense, or distribute the Evaluation Board; and (ii) permit any Third Party to access the Evaluation Board. As used herein, the term “Third Party” includes any entity other than ADI, Customer, their employees, affiliates and in-house consultants. The Evaluation Board is NOT sold to Customer; all rights not expressly granted herein, including ownership of the Evaluation Board, are reserved by ADI. CONFIDENTIALITY. This Agreement and the Evaluation Board shall all be considered the confidential and proprietary information of ADI. Customer may not disclose or transfer any portion of the Evaluation Board to any other party for any reason. Upon discontinuation of use of the Evaluation Board or termination of this Agreement, Customer agrees to promptly return the Evaluation Board to ADI. ADDITIONAL RESTRICTIONS. Customer may not disassemble, decompile or reverse engineer chips on the Evaluation Board. Customer shall inform ADI of any occurred damages or any modifications or alterations it makes to the Evaluation Board, including but not limited to soldering or any other activity that affects the material content of the Evaluation Board. Modifications to the Evaluation Board must comply with applicable law, including but not limited to the RoHS Directive. TERMINATION. ADI may terminate this Agreement at any time upon giving written notice to Customer. Customer agrees to return to ADI the Evaluation Board at that time. LIMITATION OF LIABILITY. THE EVALUATION BOARD PROVIDED HEREUNDER IS PROVIDED “AS IS” AND ADI MAKES NO WARRANTIES OR REPRESENTATIONS OF ANY KIND WITH RESPECT TO IT. ADI SPECIFICALLY DISCLAIMS ANY REPRESENTATIONS, ENDORSEMENTS, GUARANTEES, OR WARRANTIES, EXPRESS OR IMPLIED, RELATED TO THE EVALUATION BOARD INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTY OF MERCHANTABILITY, TITLE, FITNESS FOR A PARTICULAR PURPOSE OR NONINFRINGEMENT OF INTELLECTUAL PROPERTY RIGHTS. IN NO EVENT WILL ADI AND ITS LICENSORS BE LIABLE FOR ANY INCIDENTAL, SPECIAL, INDIRECT, OR CONSEQUENTIAL DAMAGES RESULTING FROM CUSTOMER’S POSSESSION OR USE OF THE EVALUATION BOARD, INCLUDING BUT NOT LIMITED TO LOST PROFITS, DELAY COSTS, LABOR COSTS OR LOSS OF GOODWILL. ADI’S TOTAL LIABILITY FROM ANY AND ALL CAUSES SHALL BE LIMITED TO THE AMOUNT OF ONE HUNDRED US DOLLARS ($100.00). EXPORT. Customer agrees that it will not directly or indirectly export the Evaluation Board to another country, and that it will comply with all applicable United States federal laws and regulations relating to exports. GOVERNING LAW. This Agreement shall be governed by and construed in accordance with the substantive laws of the Commonwealth of Massachusetts (excluding conflict of law rules). Any legal action regarding this Agreement will be heard in the state or federal courts having jurisdiction in Suffolk County, Massachusetts, and Customer hereby submits to the personal jurisdiction and venue of such courts. The United Nations Convention on Contracts for the International Sale of Goods shall not apply to this Agreement and is expressly disclaimed. ©2013 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. UG11494-0-5/13(0) Rev. 0 | Page 8 of 8