ANALOG DEVICES ADuM4122WHB1Z Single-Dual Supply High Voltage Isolated SiC Gate Driver User Guide

ANALOG DEVICES ADuM4122WHB1Z Single-Dual Supply High Voltage Isolated SiC

Gate Driver

Product Information

• Product Name: ADuM4122WHB1Z
• User Guide: UG-2123
• Description: The ADuM4122WHB1Z is a half bridge gate drive board designed for evaluating the performance of the ADuM4122 when driving Wolfspeed silicon carbide (SiC) MOSFETs and power modules. It is compatible with Wolfspeed CIL test boards, half bridge evaluation boards, and differential transceiver boards.

Features:

• Optimized for use with Wolfspeed SiC MOSFETs and power modules
• Compatible with Wolfspeed CIL test boards and half bridge evaluation boards
• High frequency, ultrafast switching operation
• Selectable slew rate control
• Jumper for easy slew rate setting
• Input and output side undervoltage lockout (UVLO)
• Differential inputs for increased noise immunity
• Isolated NTC thermistor measurement
• On board 2 W isolated power supplies

Product Usage Instructions

1. Ensure you have the following equipment:
   • Wolfspeed SpeedVal Kit Modular Evaluation Platform
   • Wolfspeed differential transceiver board (CGD12HB00D)
   • CAB011M12FM3 or CAB016M12FM3 Wolfspeed CIL board (KIT-CRD-CIL12N-FMA) for evaluating Wolfspeed six-pack modules
   • CCB021M12FM3 or CCB032M12FM3 Wolfspeed CIL board (KIT-CRD-CIL12N-FMC)
2. Refer to the ADuM4122 data sheet for full details on the product.
3. Connect the EVAL-ADuM4122WHB1Z evaluation board to the Wolfspeed SpeedVal Kit Modular Evaluation Platform.
4. If evaluating Wolfspeed half-bridge modules, connect the appropriate Wolfspeed CIL board to the evaluation board.
5. Connect the differential transceiver board (CGD12HB00D) to the evaluation board.
6. Ensure a 12 V power input is connected to the EVAL-ADuM4122WHB1Z.
7. Use the P2 logic side interface connector to connect the evaluation board to other devices as needed.
8. Refer to Table 1 in the user manual for the pinout of the logic side differential interface.
9. Follow the instructions in the user manual for output connections to power switches and NTC thermistor temperature feedback.

Evaluating the ADuM4122 Single-/Dual-Supply, High Voltage, Isolated SiC Gate Driver with Slew Rate Control

FEATURES

• Optimized for use with Wolfspeed SiC MOSFETs and power modules
• Compatible with Wolfspeed CIL test boards and half bridge evaluation boards
• High frequency, ultrafast switching operation
• Selectable slew rate control
• Jumper for easy slew rate setting
• Input and output side undervoltage lockout (UVLO)
• Differential inputs for increased noise immunity
• Isolated NTC thermistor measurement
• On board 2 W isolated power supplies EVALUATION KIT CONTENTS
• EVAL-ADuM4122WHB1Z evaluation board EQUIPMENT NEEDED
• Wolfspeed SpeedVal Kit™ Modular Evaluation Platform
• Wolfspeed differential transceiver board (CGD12HB00D)
• For evaluating Wolfspeed half-bridge modules
• CAB011M12FM3 or CAB016M12FM3
• Wolfspeed CIL board (KIT-CRD-CIL12N-FMA)
• For evaluating Wolfspeed six-pack modules
• CCB021M12FM3 or CCB032M12FM3
• Wolfspeed CIL board (KIT-CRD-CIL12N-FMC)

DOCUMENTS NEEDED
ADuM4122 data sheet

GENERAL DESCRIPTION

• The EVAL-ADuM4122WHB1Z is a half bridge gate drive board that allows simple evaluation of the performance of the ADuM4122 when driving advanced Wolfspeed silicon carbide (SiC) metal-ox-ide semiconductor field-effect transistors (MOSFETs) and power modules. The EVAL-ADuM4122WHB1Z is intended to be used with the Wolfspeed SpeedVal Kit
• Modular Evaluation Platform and Wolfspeed clamped inductive load (CIL) test boards or half bridge evaluation boards and differential transceiver boards.
• The EVAL-ADuM4122WHB1Z has an isolated return channel that is configured to read a negative temperature coefficient (NTC) thermistor and provides a variable frequency output corresponding to the resistance and temperature of the NTC.
• The control and input interface for the EVAL-ADuM4122WHB1Z uses RS-422 signaling for improved noise and disturbance immunity, and the interface includes a 12 V power input for the EVAL-AD-uM4122WHB1Z.
• For full details on the ADuM4122, see the ADuM4122 data sheet, which must be consulted when using the EVAL-ADuM4122WHB1Z.

EVALUATION BOARD PHOTOGRAPH

EVALUATION BOARD HARDWARE

LOGIC SIDE DIFFERENTIAL INTERFACE
The P2 logic side interface connector is a 16-position, 100 mil (2.54 mm) pitch, dual row header that is compatible with standard insulation displacement contact (IDC) connectors. The pinout for this interface is described in Table 1.

Table 1. Control Interface (P2) Pinout

1 Pin 3 to Pin 10 are differential pairs.

OUTPUT CONNECTIONS TO POWER SWITCH

• The P7 and P8 output connectors connect to the power switch interface board using a 4-position header, 100 mil (2.54 mm) pitch, through hole, gold plated connector (Samtec SSW-102-01-G-D).
• The P4 and P5 output connectors provide Miller clamp connection to the power switch interface board using a 2-position header, 100 mil (2.54 mm) pitch, through hole, gold plated connector (Samtec SSW-101-01-G-D).

NTC THERMISTOR TEMPERATURE FEEDBACK

• The EVAL-ADuM4122WHB1Z provides a varying frequency square wave on Pin 9 and Pin 10 of the P2 interface connector that is related to the resistance of an NTC thermistor. Note that one terminal of the thermistor is electrically connected to the low-side switch source.
• The ADuM4190 isolated amplifier measures the voltage generated by the biased NTC thermistor and provides a scaled voltage that is galvanically isolated from the thermistor. The LTC6990 voltage-con-trolled oscillator (VCO) generates a varying frequency square wave based on this scaled voltage.
• Table 2 shows the output frequency as a function of the NTC temperature when the EVAL-ADuM4122WHB1Z NTC input is connected to a Littel fuse SM502F1K NTC thermistor.
• The temperature reported by the NTC differs largely from the junction temperature of the SiC MOSFETs. Therefore, it is not recommended to use the temperature reported by the NTC as an accurate junction temperature measurement.

Table 2. Temperature to Output Frequency

NTC Thermistor Temperature (°C)

0

| NTC Thermistor
Resistance (Ω) 14,283| Output Frequency
(kHz) 6.71
---|---|---
25| 5,000| 20.38
50| 2,059| 30.29
75| 963| 35.70
100| 499| 38.45
125| 281| 39.85
150| 169| 40.60
175| 108| 41.02

SLEW RATE CONTROL

• The SRC pin of the ADuM4122 controls whether the VOUT_SRC pin is set to high-Z or follows the logic of the user supplied PWM input at the VIN+ pin. When the external series gate resistors combine the outputs from the VOUT and VOUT_SRC pins, one isolated gate driver has two easily selectable slew rates.
• When SRC is active low, an extra boost on the output is available by holding the SRC pin low.
• The jumper selection on P3 enables an easy selection of the desired slew rate.

TEST POINTS
The EVAL-ADuM4122WHB1Z contains test points that allow the testing and monitoring of key signals on the gate drive board.

EVALUATION BOARD HARDWARE

BOARD USE AND CONFIGURATION

GATE DRIVE RESISTOR SELECTION

• In addition to the slew rate selection capability offered by AD-uM4122, the EVAL-ADuM4122WHB1Z provides two separate out-put paths for turn on and turn off of the power switch. The benefit of this approach is that the user can select a total of four different series resistances, two for the turn on and two for the turn off, which allows for additional differentiation of the drive strength. It is generally desired to have the turn off occur faster than the turn on.
• To select the series resistance, choose the maximum allowed peak current (IPEAK) for the switch. Knowing the voltage swing on the gate, as well as the internal resistance of the gate driver, an external gate resistor (RG_OFF or RG_ON) can be chosen.
• IPEAK = VDD2 − VSS2 / RDSON_N + RG_OFF where RDSON_N is the pull-down NMOS on resistance.
• Solve for RG_OFF using the following equation:
• For example, if the turn off peak current is 4 A with a nominal RDSON_N value of 0.6 Ω and a (VDD2 − VSS2) value of 18 V, the RG_OFF is 3.9 Ω, as shown in the following equation:
• After RG_OFF is selected, a slightly larger RG_ON can be selected to arrive at a slower turn on time.
• If the selected switch has a nonzero internal gate resistance (RG), then this resistance must be subtracted from the calculated RG_OFF to arrive at the final RG_OFF.

POWER DISSIPATION
The power required by the gate driver is a function of the switch gate charge, switching frequency, and gate voltage swing. For one channel, the power is calculated using the following equation:

where:

• QG is the switch gate charge.
• FSW is the switching frequency.
• VDD2 and VSS2 are the isolated supply voltages.
• For the EVAL-ADuM4122WHB1Z, VDD2 = 15 V and VSS2 = −3 V.

EVALUATION BOARD SCHEMATIC

Figure 5. Circuit Schematic–Connectors and Power Section

Figure 6. Circuit Schematic–Gate Drive Section

Figure 7. Circuit Schematic–Temperature Measurement Section

EVALUATION BOARD LAYOUT

ORDERING INFORMATION

BILL OF MATERIALS
Table 3. Bill of Materials

C1, C13, C14, C15, C16, C29, C41| Ceramic capacitors, 10 μF, 50 V, 10%, X7R 1206| CGA5L1X7R1H106K160A| TDK Corporation
---|---|---|---
| | C|
C2, C7, C8, C9, C10, C11, C12| Ceramic capacitors, 0.1 μF, 50 V, 5%, X7R 1206| 12065C104JAT2A| AVX Corporation
C19, C20| Ceramic capacitors, 220 pF, 500 V, 5%, C0G 1206| 12067A221JAT2A| AVX Corporation
C3, C5| Ceramic capacitors, 1 μF, 25 V, 10%, X7R 1206| C1206R105K3RAC7800| KEMET Corporation
C34, C35| Ceramic capacitors, 22 μF, 25 V, 20%, X5R 1206| TMK316BBJ226ML-T| TAIYO YUDEN CO.
C36, C39, C45, C48, C49| Ceramic capacitors, 0.1 μF, 50 V, 10%, X7R 0603| 06035C104KAT2A| AVX Corporation
C37| Ceramic capacitor, 10 nF, 100 V, 10%, X7R 0603| GCM188R72A103KA37J| Murata Manufacturing Co.
C4, C38, C40, C42, C43| Ceramic capacitors, 1 μF, 35 V, 10%, X7R 0603| C1608X7R1V105K080AC| TDK Corporation
C44| Ceramic capacitor, 100 pF, 50 V, 10%, X7R 0603| C0603C101K5RAC| KEMET Corporation
C46, C47| Ceramic capacitors, 56 pF, 50 V, 5%, C0G 0603| 223886715569| Phycomp (YAGEO
| | | Corporation)
D1| Zener diode| CMOZ1L8 PBFREE| Central Semiconductor
D4, D5| Schottky diode barrier rectifiers| SS2P3-M3/84A| Vishay Intertechnology
DS1| 1.6 mm x 0.8 mm SMD chip, LED lamp, red 640 nm| APT1608SRCPRV| Kingbright Electronic Co.
E1, E2, E3, E4| Ferrite bead inductors, 0.150 mΩ maximum DC resistance (DCR), 1 A| MPZ1608B471ATA00| TDK Corporation
FL1| Common mode, choke data line filter with noise suppression| 744232222| Würth Elektronik
J1, J2| PCB Connectors, 50 Ω, male MMCX steel plug| MMCX-J-P-H-ST-TH1| Samtec
L1, L3| Coupled chip inductors, common mode choke, 0.630 Ω DCR, 0.7 A| PFD3215-682MEC| Coilcraft Inc.
M2, M6| DC-to-DC converters, 2 W, 12 V voltage input, +15 V to −3 V voltage| R12P21503D| RECOM Power
| output| |
P1| PCB connector, two position, male header socket 2.54 mm pitch, 3.68 mm| 22232023| Molex
| solder tail| |
P2| PCB connector, 16 position, male header socket, dual row 2.54 mm pitch| SBH11-PBPC-D08-ST-BK| Sullins Connector Solutions
P3| PCB connector, three position, male header unshrouded single row| HTSW-103-07-G-S| Samtec
| socket, 2.54 mm pitch| |
P7, P8| PCB connectors, four position, female header double row socket, 2.54| SSW-102-01-G-D| Samtec
| mm pitch| |
R7, R8, R11, R12, R15, R16, R45| SMD resistors, 0 Ω jumper 1/10 W, 0603| RC0603JR-070RL| YAGEO Corporation
R18, R19, R20, R21, R23, R24, R25,| SMD resistors, 10 Ω, 1%, 1/2 W, 1206| RCS120610R0FKEA| Vishay Intertechnology
R26| | |
R28, R30| SMD resistors, 10 kΩ, 1%, 1/4 W, 1206| ERJ-8ENF1002V| Panasonic
R41| SMD resistor, 49.9 kΩ, 1%, 1/10 W, 0603| ERJ-3EKF4992V| Panasonic
R42, R43, R44| SMD resistors, 100 kΩ, 5%, 1/10 W, 0603| RC0603JR-07100KL| YAGEO Corporation
R46| SMD resistor, 1 MΩ, 1%, 1/10 W, 0603| CRCW06031M00FKEA| Vishay Intertechnology
R47| SMD resistor, 390 kΩ, 1%, 0.1 W, 0603| ERJ-S03F3903V| Panasonic
R48| SMD resistor, 100 Ω, 0.1%, 1/10 W, 0603| ERA-3AEB101V| Panasonic
R49, R59| SMD resistors, 240 Ω ,1%, 1/10 W, 0603| CRCW0603240RFKEA| Vishay Intertechnology
R2, R50| SMD resistors, 750 Ω, 1%, 1/10 W, 0603| CRCW0603750RFKEA| Vishay Intertechnology
R51, R60| SMD resistors, 1.69 kΩ, 1%, 1/10 W, 0603| RC0603FR-071K69L| YAGEO Corporation
R52| SMD resistor, 20 kΩ, 1%, 1/10 W, 0603| CRCW060320K0FKEA| Vishay Intertechnology
R1, R53, R54, R55, R56| SMD resistors, 10 kΩ, 1%, 1/8 W, 0603| MCT06030C1002FP500| Vishay Intertechnology
R57, R58| SMD resistors, 120 Ω, 1%, 1/10 W, 0603| ERJ-3EKF1200V| Panasonic
U1, U2| Single gate, adjustable slew rate, isolated drivers| ADUM4122ARIZ| Analog Devices, Inc.
U5| ESD protected, dual RS-422 transceiver| ADM4168EBRUZ| Analog Devices, Inc.
U6| High stability isolated error amplifier| ADUM4190SRIZ| Analog Devices, Inc.
U8| Voltage controlled silicon oscillator| LTC6990HS6#TRMPBF| Analog Devices, Inc.
VR1, VR2| 0.5 A, adjustable output, positive voltage regulators| NCV317MBDTRKG| onsemi
D2| 1.5 W, plastic surface mount Zener voltage regulator| 1SMA5931BT3G| onsemi
---|---|---|---
D3| 1 A, SMT Schottky barrier rectifier| DFLS1150-7| Diodes Incorporated
P4, P5| PCB connectors, two position female header double row solder tail, 2.54| SSW-101-01-G-D| Samtec
| mm pitch| |
Q1| P-channel enhancement mode MOSFET| DMP3098L-7| Diodes Incorporated
R3, R4, R5, R6, R9, R10, R13, R14| SMD resistors, 0 Ω jumper, 1/10 W 0603| RC0603JR-070RL| YAGEO Corporation
R17, R22, R27, R29| SMD resistors, 0 Ω jumper, 1/4 W 1206| ERJ-8GEY0R00V| Panasonic

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. 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.

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Trademarks and registered trademarks are the property of their respective owners.
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References

• Mixed-signal and digital signal processing ICs | Analog Devices
• Mixed-signal and digital signal processing ICs | Analog Devices
• ADuM4122 Datasheet and Product Info | Analog Devices
• ADuM4122 Datasheet and Product Info | Analog Devices
• ADUM4190 Datasheet and Product Info | Analog Devices
• LTC6990 Datasheet and Product Info | Analog Devices

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