EVAL-ADUM4146EBZ

User Guide | EVAL-ADuM4146 UG-2034 Evaluating the ADuM4146 11 A High Voltage Isolated Bipolar Gate Driver with Fault Detection, Miller Clamp GENERAL DESCRIPTION FEATURES ► ► ► ► ► ► 11 A peak short-circuit current Desaturation protection circuitry Integrated Miller clamp CMOS input logic levels 12 V to 30 V output drive Supports TO-220 and TO-247 switch footprints The EVAL-ADuM4146EBZ supports the ADuM4146 advanced isolated gate driver. The EVAL-ADuM4146EBZ comes populated with the ADuM4146BRWZ grade of the model but is compatible with all three grades. Because the evaluation board has footprints for insulated gate bipolar transistors (IGBTs) and metal-oxide semiconductor field effect transistors (MOSFETs) in TO-247, TO-220, and 0.100” spaced lead packages, the ADuM4146 can be evaluated with many different power devices. The EVAL-ADuM4146EBZ comes with footprints to facilitate evaluating the desaturation detection, as well as Miller clamp operation. SUPPORTED ICOUPLER MODELS ADuM4146ARWZ ADuM4146BRWZ ► ADuM4146CRWZ ► For full details on the ADuM4146, see the ADuM4146 data sheet, which should be consulted in conjunction with this user guide when using this evaluation board. ► EVALUATION BOARD PICTURE Figure 1. PLEASE SEE THE LAST PAGE FOR AN IMPORTANT WARNING AND LEGAL TERMS AND CONDITIONS. Rev. 0 | 1 of 6 User Guide EVAL-ADuM4146 TABLE OF CONTENTS Features................................................................ 1 Supported iCoupler Models................................... 1 General Description...............................................1 Evaluation Board Picture....................................... 1 Setting Up the EVAL-ADuM4146EBZ....................3 Initial Configuration.............................................3 Pad Layout for the Device Under Test (DUT).....3 Power Connections............................................ 3 Input and Output Connections............................3 Evaluation Board Schematic................................. 4 Evaluation Board Layout....................................... 5 Ordering Information..............................................6 Bill of Materials................................................... 6 REVISION HISTORY 4/2022—Revision 0: Initial Version analog.com Rev. 0 | 2 of 6 User Guide EVAL-ADuM4146 SETTING UP THE EVAL-ADUM4146EBZ INITIAL CONFIGURATION Before the first use, certain things must be completed to prepare the EVAL-ADuM4146EBZ for operation. In the stock configuration, the R1 to R5 resistors are not placed. These are the location of the series external resistors for the charging and discharging paths to VOUT_ON and VOUT_OFF. It is recommended to use 1206 surface-mount resistors with values between approximately 1 Ω and 10 Ω, depending on the load being driven. Calculate the expected power dissipation within the external series gate resistors. The EVAL-ADuM4146EBZ was not designed with full power operation as the main goal. However, this evaluation board was designed to simply showcase the different functions of the ADuM4146. As such, the layout is not as tight as an actual application requires, and in an actual application, many external series gate resistors can be placed in parallel with one another to increase the allowable power dissipation. An actual IGBT or MOSFET can be placed in the provided landing patterns to the right of P5 and P6. P5 and P6 allow shorting across the series external resistors to observe overshoot and/or to probe the voltage to quantify peak currents. In the stock configuration, the DESAT circuitry is left open. Before the first use, if DESAT functionality is not used, it is recommended to short the DESAT pin to ground, either by placing a 0.1” jumper on P4 or by placing a 0 Ω resistor in the C6 component pad. Failure to do so results in a DESAT fault being observed on the first rising edge of the output. If the DESAT circuitry is tested, an IGBT or MOSFET must be added to the circuit to allow for the DESAT pin to be pulled down during on times, preventing the DESAT fault. Additionally, C6, R9, and D1 must have appropriate components placed. For details about sizing, refer to the ADuM4146 data sheet. R8 is provided to allow extra DESAT blanking current by means of an external pull-up resistor. If U1 is replaced with either the A grade or C grade of the ADuM4146, R8 is required as there is no internal current source on these grades. R3 and R4 come with 3.48 kΩ resistors in place. These resistors provide pull ups to the READY and FAULT pins. LED indicators can be activated by placing jumpers on P7 and/or P8. When in place, D2 and D3 illuminate to give the status of the FAULT and READY pins, but the voltages on FAULT and READY are clamped to the forward voltage of the light emitting diodes (LEDs). As such, it is not recommended to drive a CMOS input with the FAULT and READY pins if the indicator LEDs are used. P3 allows for easy enabling and disabling of the ADuM4146 by means of jumper pins. A silkscreen reminder is included to show which pins to short to enable or disable the ADuM4146. During operation, if a fault is seen, the FAULT pin is brought low. In this case, the ADuM4146 can be reset by either powering down VDD1 to VSS1 and powering back up, or by bringing the RESET pin low then high again. The easiest way to toggle RESET is to remove the jumper on P3 from Pin 2 and Pin 3 and then replace them. An internal pull-down resistor brings RESET low on its own. PAD LAYOUT FOR THE DEVICE UNDER TEST (DUT) Figure 3 shows the top layer artwork for the dual gate driver circuit and the following components: U1 is the footprint for the ADuM4146. ► C1, C2, and C4 are 0.1 μF bypass capacitors, and C3 and C5 are 10 µF bypass capacitors. ► R6 and R7 are gate resistors that control the edges of the outputs. By default, no resistors are installed; these resistors must be populated with low value 1206 resistors, generally in the 1 Ω to 10 Ω range. ► POWER CONNECTIONS Follow these steps to connect the EVAL-ADuM4146EBZ to the power supply: 1. Connect the 5 V or 3.3 V input supply with the positive terminal on VDD1 and the ground on VSS1. 2. Connect the ADuM4146 VDD2 supply voltage (12 V to 30 V) to the VDD2 pin and its return to the VSS2 pin. Note that VSS1 and VSS2 are functionally isolated. The emitter and source of the IGBT or the MOSFET are tied to GND2. INPUT AND OUTPUT CONNECTIONS The VI+ and VI− pins are CMOS inputs. P1 and P2 allow for easy placement of 49.9 Ω terminating resistors by placing a 0.1” jumper in Position 2 and Position 3 of P1 and/or P2. This also allows for dc state testing of the VI+ and VI− pins. In Position 1 and Position 2, a jumper pulls the input pin high. If no jumper is placed, the VI+ and VI− pins and screw terminals are high-Z inputs. The EVAL-ADuM4146EBZ comes with screw terminals for both the input and output connections. These terminals help facilitate connection options but are not the best option for high performance transient testing. The best measurements performed on the load, whether it is an IGBT, a MOSFET or a load capacitor, come from small loop measurements performed right at the load. Using the screw terminals as either the sensing node or for the connection of the load often results in overshoot being observed during measurement. Pins accompany the screw terminals. It is left to the user to decide which connection mechanism to use. Do not leave VSS2 floating because it must always be at or less than the potential of GND2. Shorting VSS2 and GND2 is a valid operating point. analog.com Rev. 0 | 3 of 6 User Guide EVAL-ADuM4146 EVALUATION BOARD SCHEMATIC Figure 2. EVAL-ADuM4146EBZ Evaluation Board Schematic analog.com Rev. 0 | 4 of 6 User Guide EVAL-ADuM4146 EVALUATION BOARD LAYOUT Figure 3. EVAL-ADuM4146EBZ Evaluation Board Top Layer Figure 4. EVAL-ADuM4146EBZ Evaluation Board Bottom Layer analog.com Rev. 0 | 5 of 6 User Guide EVAL-ADuM4146 ORDERING INFORMATION BILL OF MATERIALS Table 1. Quantity Reference Designator Description 1 3 2 1 1 2 2 1 5 3 Not applicable U1 C1, C2, C4 C3, C5 D2 D3 R1, R2 R3, R4 R5 P4 to P8 P1 to P3 C6, C7, D1, Q1, Q2, R6 to R9 ADuM4146BRWZ 11 A high voltage isolated bipolar gate driver with fault detection, Miller clamp Capacitors, 0.1 µF, 50 V, 10%, 1206 Capacitors, 10 µF, 50 V, 10%, 1206 LTST-C190GKT, green LED, 0603 LTST-C190CKT, red LED, 0603 Resistors, 49.9 Ω, ¼ W, 1206 Resistors, 3.48 kΩ, ¼ W, 1206 Resistor, 0 Ω, ¼ W, 1206 2 position, 0.1” male header 3 position, 0.1” male header Not installed 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 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. 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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. ©2022 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887-2356, U.S.A. Rev. 0 | 6 of 6