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LM5060: Can I use this in a 600W application?

Part Number: LM5060
Other Parts Discussed in Thread: LM5069, CSD19502Q5B

Hello,

I need a fet controller for the below application but i'm not sure if the LM5060 would be a good fit. Recommendations on the controller and fet would be appreciated.

We are in need of a buck/boost controller with the following specs:

Output power : 600W

Input voltage: 24V

Output voltage: 20-29V

Regards,
David

  • David,

    Yes, it can work with 600W. CSD19502Q5B (80v rated) can handle the stress of power up into some capacitive load. The FET will see the energy equalt to 1/2 CV^2 so you probably need a good SOA FET like this one. At 20v, assuming 600W is a constant power load, you would have 30A so you need up to 3 of these FETs depending on airflow, max ambient, and Cu on the board. You can go with 60v FETs also, but I would not recommend lower than 60v for transients. Recognize that the LM5060 is a very basic hotswap device with inrush control, uv, ov features. It doesn't protect very well against over current as it is a time out only, not a current limit or power limit capable. So a short on the output would most likely result in a FET failure. If you want CL and PL, use the LM5069 which offers much better circuit protection. If this is an automotive app, only the LM5060 is Q1.

    Brian