SLLA665 April   2025 MCF8315A , MCF8315C , MCF8315C-Q1 , MCF8315D , MCF8316A , MCF8316C-Q1 , MCF8316D , MCF8329A , MCF8329A-Q1

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 Open Loop and Handoff Stage
  5. 2EEPROM Configurations Affecting Open Loop to Closed Loop Handoff
  6. 3Open Loop to Closed Loop Handoff Tuning
    1. 3.1 Experimental Way to Tune Open Loop and Handoff Stage
      1. 3.1.1 Step-1: Initial Configuration
      2. 3.1.2 Step-2: Tuning of Parameters In Case Handoff is not Proper
        1. 3.1.2.1 Tuning of OL_ILIMIT
        2. 3.1.2.2 Tuning of Open Loop Acceleration Co-Efficient A1
        3. 3.1.2.3 Tuning of Handoff Thresholds
      3. 3.1.3 Step-3: Tuning of Handoff Configurations
  7. 4Optimum Handoff
    1. 4.1 Open Loop Time With the Recommended Settings
    2. 4.2 Open Loop Time by Following Optimum Handoff Steps
  8. 5Summary
  9. 6References

Abstract

The MCF83xx family devices provide a single-chip, code-free sensor less FOC design for customers driving BLDC motors for applications such as residential fans, ceiling fans, water pumps, vacuum cleaners, and so forth. The BLDC motor goes through different spinning stages, such as pre-startup, startup, open loop, closed loop and motor stop. Each of these stages requires tuning to spin the motor reliably and efficiently every time. This application note documents configurations affecting the open-loop to closed-loop transition of a BLDC motor and presents an experimental method for tuning these configurations for a reliable transition across various operating conditions.

The examples in this document are demonstrated on the MCF8316C. However the document is applicable for all the following devices (referred to as MCF83xx devices in this document):

  • MCF8315A
  • MCF8315C
  • MCF8315C-Q1
  • MCF8316A
  • MCF8316C
  • MCF8316C-Q1
  • MCF8315D
  • MCF8316D
  • MCF8329A
  • MCF8329A-Q1