LT3750 - controlling the capacitor charging current

avihai on Mar 20, 2019

Hello,

I'm using the LT3750 to charge a capacitor to 240V from a 8VDC source.

The capacitor is charged in ~200msec to the target voltage with an input current (from the 8V) of 1.1A and slowly decrease to ~0.6A.

I'd like to decrease the input current to 0.6Arms max and I don't mind to have a longer charging time consequently.

How can I control the input current (or the charging rate)?

Thanks.

Top Replies

ADIApproved Mar 20, 2019 +1 suggested

avihai

I did not find corresponding expression in LT3750 DS. By meantime, please use formula of page 15 DS LT3751, Choosing Capacitor Charger IPK. I'll refer your question to the IC designer for conformation…