Servo Driver PCB

2026-08-11



Key Features

  • Position, speed and torque control loops

  • Field-oriented control capability

  • Encoder feedback and brake control

  • Fast hardware fault protection


Typical Electronic Components

Real-time MCU/DSP; gate drivers; MOSFET power stage; isolated amplifiers; current sensors; encoder interface; CAN/EtherCAT transceiver.


Reference PCB and PCBA Parameters

Reference item

Typical guidance

Typical layers

4-10 layers

Copper

1-4 oz, selected by power stage

Control rate

Application-dependent; validate in system

Interfaces

Encoder, CAN/CAN FD, EtherCAT or RS-485

Key processes

Impedance control, heavy copper, thermal vias

Testing

Encoder simulation, motor-load and protection test

Manufacturing and Engineering Priorities

  • Partition precision feedback, digital control and switching power sections.

  • Control ADC reference, clock jitter and ground noise.

  • Match power-stage dead time and current sensing to the selected motor.

  • Validate loop stability with the actual motor, encoder and load.


Design and Commercial Cautions

  • Servo Driver PCB is more control-intensive than a general Motor Driver PCB.

  • Firmware tuning and motor parameters are part of system validation, not PCB fabrication alone.

  • Functional testing needs an agreed motor or simulator and acceptance limits.


Applications

Industrial arms, cobots, humanoid joints, robot dogs and precision axes.

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