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Analysis of MOSFET Power Loss in Buck Switching Power Supply
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Bo Liao, Weiliang Li, Mulong Zhao, Jiawen Lü, Li Yang
Automotive Engineer | 2025, (4) : 10 - 16
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Automotive Engineer | 2025, (4): 10-16
Analysis of MOSFET Power Loss in Buck Switching Power Supply
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Bo Liao, Weiliang Li, Mulong Zhao, Jiawen Lü, Li Yang
Affiliations
  • Global R&D Center, China FAW Corporation Limited, Changchun 130013
Published: 2025-04-15 doi: 10.20104/j.cnki.1674-6546.20230411
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In order to calculate power loss of switching power supplies of high-performance chip in automotive centralized domain controller, this article analyzes the on and off processes of Metal-Oxide-Semiconductor Field Effect Transistor (MOSFET), theoretically analyzes and derives formulas for the MOSFET losses of Buck type switching power supplies, and focuses on example calculation and simulation verification of the switch losses. The calculation and simulation results tend to be consistent, which can be used as a reference for hardware design engineers when selecting switch power MOSFETs.

Switching power supplies  /  MOSFET loss  /  Buck  /  Conduction loss  /  Switching loss
Bo Liao, Weiliang Li, Mulong Zhao, Jiawen Lü, Li Yang. Analysis of MOSFET Power Loss in Buck Switching Power Supply[J]. Automotive Engineer, 2025 , (4) : 10 -16 . DOI: 10.20104/j.cnki.1674-6546.20230411
Year 2025 volume Issue 4
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doi: 10.20104/j.cnki.1674-6546.20230411
  • Online Date:2025-11-14
  • Published:2025-04-15
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  • Revised:2023-12-27
Affiliations
    Global R&D Center, China FAW Corporation Limited, Changchun 130013
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表12种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
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Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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