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CSD17573Q5B: 推動相同電流MOSFET(High Side)溫度會隨著架構不同而不同

Part Number: CSD17573Q5B

 如要搭配下方Gate Driver, Rg(R50, R52), Rgs(R1, R319), Cboot(C27), Rnode(R51)該怎麼設計以降低MOSFET溫度?

理論上這顆MOSFET的RdsOn已經夠小, 但我們實際操作在下方架構8A就有過溫問題, 之前用其他的Buck Converter IC搭配這顆MOSFET可以到達20A(該Converter操作頻率約200KHz)

 

Driver IC: Infineon-2ED2101S06F

Driver Voltage: 12V

Driver Input: 80KHz PWM (Gen by MCU)

Driver Output: Half Bridge, 2 MOSFETs (TI csd17573q5b)

Power Input Voltage: 20V

Power Ouput Voltage: 12.8V

Schematic: below (Buck Converter, Current flows from right to left)