LX7720 Daughter Board User's Manual

PublishTime：2021-07-19

The LX7720 provides four half-bridge drivers with floating current sense for motor coil driving, six bi-level inputs for position sensing, and a resolver to digital interface with primary coil driver. The LX7720 supports a ground potential difference between the motor and signal grounds of up to 10V and motor supply voltages up to 60V.
When used with an FPGA or MCU controller, the LX7720 provides a complete open- or closed-loop motor driver with coil current feedback and rotation or linear position sensing for stepper motors, brushless DC and permanent magnet motors.
Position sensing supports encoders, hall sensors, resolvers, synchros, and LVDTs. Resolver carrier frequencies from 360Hz to 20kHz are supported. FPGA IP modules are available to support motor driving functions from open loop cardinal step driving to space vector modulation using field oriented control.
The LX7720 contains 7 sigma delta modulators for analog acquisition. Sinc filtering and decimation is performed in the FPGA or MCU controller. Four modulators sample the voltage across floating current sense inputs. The remaining three modulators sample differential analog inputs such as the filtered drive waveform and output waveforms of a resolver.
The LX7720 daughter board uses an FMC connector for plug-in connection to the RTG4 FPGA DEV-KIT (Figure 1) and PolarFire FPGA MPF300-EVAL-KIT (Figure 2 on page 2) development boards. A 40-way header provides the same signals for connection to other boards such as the ProASIC3 FPGA Starter Kit (Figure 3 on page 2), the SAMRH71F20 MCU Evaluation Kit (Figure 4 on page 2), and the SAMV71Q21RT MCU SAM V71 Xplained evaluation kit.

Brand of Product：	MICROSEMI
Part#：	LX7720 、 LX7720-ES More Part#
Product Category：	Daughter Board 、 half-bridge drivers More
Application：	More
Data Type：	User's Guide More
Safety & Environment Standards：	More
Operating Temperature：	Please see the document for details
Qualification Grade：	More
Qualification Approval：	More
Package：
Language：	English Chinese Chinese and English Japanese
Date of Creation：	2020-6-4
Version Number：	rev 2.1
Data Encoding：
Data Size：	5.4 MB

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