Sep 23, 2022 #1 C cupoftea Advanced Member level 6 Joined Jun 13, 2021 Messages 3,003 Helped 59 Reputation 118 Reaction score 138 Trophy points 63 Activity points 15,944 Hi, We are doing a DCM Buck LED driver. (LTspice attached) F(sw) = 90kHz. Vin = 390VDC V(LEDs) = 228V P(LEDs) = 155W Peak L current = 2.15A L = 62 turns round a MS-157060-2 sendust torroid. (2 strands of 0.315mm Enamelled copper wire) The core loss adds up to 2W. Internal enclosure ambient is 60 degrees. Do you think the torroid will be OK? MS157060-2 TORROID https://datasheets.micrometals.com/MS-157060-2-DataSheet.pdf Sendust material MS - Sendust - Micrometals www.micrometals.com Attachments Buck HV.zip 1.7 KB · Views: 125
Hi, We are doing a DCM Buck LED driver. (LTspice attached) F(sw) = 90kHz. Vin = 390VDC V(LEDs) = 228V P(LEDs) = 155W Peak L current = 2.15A L = 62 turns round a MS-157060-2 sendust torroid. (2 strands of 0.315mm Enamelled copper wire) The core loss adds up to 2W. Internal enclosure ambient is 60 degrees. Do you think the torroid will be OK? MS157060-2 TORROID https://datasheets.micrometals.com/MS-157060-2-DataSheet.pdf Sendust material MS - Sendust - Micrometals www.micrometals.com