L99LD21Q6TR Led driver IC (What to know its best Switching Frequency)

[Sha_shi]

Hi,

L99LD21Q6TR is a LED driver (Buck and Boost).

For my application, i am using Boost separate and Buck separately. This IC Frequency range is 100KHz to 450KHz.  

My design consideration for Boost is 

• Input voltage range: 10 V to 16 V
• Output voltage: VBOOST: 35 V
• LED current or Output current: 450 mA

My design consideration for BUCK is 

• Input voltage: VBUCKIN:  14 V
• Output voltage: VLED: 10.1 V
• LED current or Output current: 1.4 A

what is best frequency for Boost and what is best frequency for Buck?