UC2845: fosc setting

Part Number: UC2845


Hi team,

Customer want the device switching at 250kHz, so 500kHz should be fosc.

However, if the setting Rrt = 5kohm, Cct=1nF as a minimum value of recommneded range, fosc becomes 344kHz (1.72/5k/1n)

How can customer set to fosc=500kHz?

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Best regards,

Hayashi