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

3.6.1 MCF8315 TSSOP Thermal Test With Inductance Version

The following test run the MCF8315 TSSOP at 24V and 1.25A (30W), output peak current approximately 2.3A(73Hz), two layer PCB test result. (PWM switching frequency :15KHz)

Ambient temperature is 26°C, temperature rise is about 68°C.

MCF8315 Two Layer With Inductance Version PCBFigure 3-9 MCF8315 Two Layer With Inductance Version PCB
MCF8315 Two Layer With Inductance 30W Thermal Test ResultFigure 3-10 MCF8315 Two Layer With Inductance 30W Thermal Test Result

The following test run the MCF8315 TSSOP at 24V and 0.89A (approximately 20W), out output peak current approximately 2.1A(68Hz). Single layer PCB test result. (PWM switching frequency :15KHz)

Ambient temperature is 27°C, temperature rise is about 57.5°C.

MCF8315 Single Layer With Inductance Version PCBFigure 3-11 MCF8315 Single Layer With Inductance Version PCB
MCF8315 Single Layer With Inductance 20W Thermal Test ResultFigure 3-12 MCF8315 Single Layer With Inductance 20W Thermal Test Result