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

2.1 Total Discrete Hardware Design

This design includes the architecture of processor MCU + half-bridge driver + MOSFET + current amplifier circuit + current detection circuit + protection unit. The advantage is that different materials and specifications can be flexibly selected to achieve higher power and better temperature rise. The disadvantage is that the material cost is high, and the PCB area is limited by the motor size. For example, for a 48mm/60mm motor, the internal clearance diameter of the stator is about 25mm/30mm, resulting in only a 23mm/30mm wide area for component layout in the design, which is hard for engineer to layout.

Discrete Hardware Design Architecture in Fan Application Figure 2-1 Discrete Hardware Design Architecture in Fan Application