Isolated Precision Half-Bridge Driver, 4 A Output
The ADuM7223 is a 4A isolated, half-bridge gate driver that employ Analog Devices, Inc.’s iCoupler® technology to provide independent and isolated high-side and low-side outputs. Combining high speed CMOS and monolithic transformer technology, these isolation components provide outstanding performance characteristics superior to alternatives such as the combination of pulse transformers and non-isolated gate drivers. By integrating the isolator and driver in a single package, propagation delay is a maximum of only 60 ns and the propagation skew from channel to channel is a maximum of only 7ns.The ADuM7223 provides two independent isolation channels.
The ADuM7223 operates with an input supply ranging from 3.0 V to 5.5 V, providing compatibility with lower voltage systems. The outputs operate in a wide range from 4.5V to 18V with three output voltage versions available. The 5 x 5 mm, LGA package provides 2500 VDC PEAK operating voltage from input to output and from output to output.
In comparison to gate drivers employing high voltage level translation methodologies, these gate drivers offer the benefit of true, galvanic isolation between the input and each output. As a result, these gate drivers provide reliable control over the switching characteristics of IGBT/MOSFET configurations over a wide range of positive or negative switching voltages.
- Switching power supplies
- Isolated IGBT/MOSFET gate drives
- Industrial inverters
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
The EVAL-ADUM7223EBZ supports the ADuM7223 isolated precision half-bridge driver. Because the evaluation boards have footprints for IGBTs and MOSFETs in TO-252 packages, the ADuM7223 can be evaluated with many different power devices. The evaluation boards also allow the high-side supply to be bootstrapped to the low-side supply.
Two motors can be driven at the same time, each motor having its separate power supply. The system incorporates high quality power sources; reliable power, control, and feedback signals isolation; accurate measurement of motor current & voltage signals; high speed interfaces for control signals to allow fast controller response; industrial Ethernet high speed interfaces; single ended Hall, differential Hall, encoder and resolver interfaces; digital position sensors interface; flexible control with a FPGA/SoC interface.
The kit consists of two boards: a controller board and a drive board. An optional AD-DYNO2-EBZ dynamometer can also be purchased through Avnet and is intended to be an extension of the drive system.
- Digital board for interfacing with the low and high voltage drive boards
- Compatible with all Xilinx FPGA platforms with FMC LPC or HPC connectors
- FMC signals voltage adaptation interface for seamless operation on all FMC voltage levels
- Fully isolated digital control and feedback signals
- Isolated Xilinx XADC interface
- 2 x Gbit Ethernet PHYs for high speed industrial communication, with 3rd party EtherCAT support
- Single ended Hall, Differential Hall, Encoder, Resolver interfaces
- Digital sensors interfaces
- BISS Interface
- Drives motors up to 48V @ 20A
- Drives 2 motors simultaneously
- High frequency drive stage implemented with ADI isolated gate drivers
- Supported motor types
Stepper (bipolar / unipolar)
- Integrated over current protection
- Reverse voltage protection
- Current and Voltage measurement using isolated ADCs
- BEMF zero cross detection for sensorless control of PMSM or BLDC motors
- Separate voltage supplies for the 2 motors so that the motors don't influence each other
Dynamometer System with Embedded Control
- Two BLDC motors connected by a rigid couple in a dyno setup, which can be used to test real-time motor control performance.
- One BLDC motor acts as an electronically adjustable load and is driven by the embedded control system. This motor can be directly connected to the FMC motor drive to get complex / active loads. The load can be driven also by the AD-FMCMOTCON2-EBZ to implement dynamic load profiles.
- The other BLDC motor is driven by the FMC motor drive.
- Measurement and display of load motor current
- Measurement and display of load motor speed
- External control using Analog Discovery and MathWorks Instrumentation Control Toolbox
Example reference designs showing how to use the platform with Xilinx® FPGAs or SoCs and high performance control algorithms from Mathworks® are provided together with the hardware. Information on the FMC board, and how to use it, the design package that surrounds it, and the software which can make it work, can be found by clicking the software link.
Overcoming Limitations of Optocoupler and High Voltage Gate Driver Solutions
The isolated gate driver portfolio from Analog Devices offers designers performance and reliability advantages over...
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.