SLLA673 March   2025 MCF8315A , MCF8315C , MCF8315D , MCF8316A , MCF8316C-Q1 , MCF8316D

 

  1.   1
  2.   Abstract
  3.   Trademarks
  4. 1Introduction
    1. 1.1 MCF8315 Block Diagram and Pin Functions Introduction
  5. 2Fan Application Hardware Architecture
    1. 2.1 Total Discrete Hardware Design
    2. 2.2 MCU+Pre-Driver and External FET Design
    3. 2.3 All in One Design
  6. 3MCF8315 Hardware Design Guide for Fan Application
    1. 3.1 MCF8315 Power Part Design
    2. 3.2 MCF8315 Function Part Design
    3. 3.3 MCF8315 Communication and Output Part Design
    4. 3.4 MCF8315 Schematic Design Reference
    5. 3.5 MCF8315 Simplifies Peripheral Design
    6. 3.6 MCF8315 Thermal Performance Test
      1. 3.6.1 MCF8315 TSSOP Thermal Test With Inductance Version
  7. 4Summary
  8. 5References

2.2 MCU+Pre-Driver and External FET Design

In this design, some MCU device integrate gate driver and built-in current amplification/protection circuits. Users only need to connect external MOSFETs. Compared with the previous design, this can reduce material costs to a greater extent and make this easier for engineers to layout the system. This design is also widely used in the market. The disadvantage is that engineers still need to spend a lot of time on low-level driver debugging and optimizing the motor control algorithm.

MCU+Pre-driver and External FET Architecture in Fan Application Figure 2-2 MCU+Pre-driver and External FET Architecture in Fan Application