LP8868Z-Q1: LP8868Z-Q1 12V input 1.35A output efficiency related

Hi, Vayne

May I kindly know what is the switching frequency? The efficiency may 90%.

Hi Zhiqian,

The switching frequency is generally 300-500kHz, which can balance efficiency and inductance size. This project pursues the best efficiency, and when the 24V input is used, the datasheet shows around 88%

Hi Vayne,

Our expert is currently out of office and will reply to you next Monday. Thanks for your understanding.

Best Regards,

Steven

Hi Steven,

OK.
Please take another look at this question. The customer's project is quite urgent.

Hi Vayne,

I understand. I will tell Zhiqian to respond to you as early as possible. Thanks for your understanding.

Best Regards,

Steven

Hi Teams,

Please help confirm if the frequency range of the input PWM can accept 30Hz in the PWM dimming mode of LP8868Z-Q1.

Thank you!

Hi, Vayne

Sorry for the late reply, pls see my feedback in below.

Yes, it can work as 30Hz. The efficiency should be around 90%.

May I kindly know what is the EE of this case? If needed pls share with your email, we can discuss in details.

Hi Zhiqian,

Thank you for your reply. It was very helpful.

The customer's application is DMS Camera.

My email is Vayne.li@arrow.com

Hi Zhiqian,

I still have some questions to ask you. LP8868Z-Q1 has only one MOS inside, and it has several topological structures that can be used as a buck, boost，buck-boost， So without integrating the upper MOS, I understand that the power consumption of the diode will be relatively high and the asynchronous efficiency will be low. However, TI's products have relatively high efficiency, so I would like you to explain the principle.

Also, I saw on the official website that the EVM corresponds to the model TPS922055DMTREVM. Are these two the same part?
Is it just one industrial grade and one automotive grade?

Hi, Vayne

I have sent you an email.