Other Parts Discussed in Thread: SN6501
Team,
There is no loss estimation curve in the datasheet for SN6501-Q1, how can i perform worst case analysis to calculate junction temperature of this IC?
Thank you,
Julio
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Hi Julio,
I have a correction in my previous post. Apologies for a reposting the answer.
The loss in SN6501 device will be due to the switch resistance in the driver stage, that is I2RDS-ON , where 'I' is the primary side current.
For SN6501's maximum transforemer drive current of 150mA at 3.3V Vcc, with max 3Ω RDS-ON , the power loss is calculated as below,
I2RDS-ON = 0.15*0.15*3 = 67mW power loss.
This power loss value can be used to estimate junction temp based on package theta numbers mentioned in the datasheet.
Regards
Tejas.