Replacement plan of Flybuck DC/DC

I want to replacement for Rohm's isolated DC/DC.

(Datasheet is attached)

bd7f100xxx-lb-e.pdf

But Flybuck have below problem.

・Can below reference output 10W power?

　（but, have to not use dummy load.）

・Transient response

・Flybuck is made on the assumption for multi output

　Anxiety for stable operation of single output

⇒Is there a way to clear problem?

(Competitor have Load Compensation function, transient response is good)

【Customer spec】

・Vin：12V or 24V

・Vout：15V、5～10W

　※10W is maximum case, 7～8W solution is OK.

・Photocoupler-less is requirements

・Internal FET

Promoting device: LM5160A and LM34927.

(If there more good idea, please let me know)

Best regards,

Satoshi