TMS320C6727B: PLLHV power supply and EMI filter

Don Foong

Part Number: TMS320C6727B

Hi Team,

One of our customer (Coherent) has question regards to TMSDC6727BZDHA250, hope you can help on below questions, thanks in advance.

1、What is the current requirement of PLL power supply（PLLHV）? Does 3.3V 250 mA meet the requirements of TMSDC6727BZDHA250?

2、From datasheet page 107, Figure 4-44 recommend a EMI filter from TDK ACF451832-xxx with different attenuation frequency (12MHz ~ 23MHz). Which EMI filter is suitable for TMSDC6727BZDHA250, should we select one with maximum attenuation frequency that is close to the OSCIN frequency?

Look forward to your comments, thanks again.

Best regards,

Don

over 1 year ago

+1 Kallikuppa Sreenivasa over 1 year ago

TI__Guru*** 143659 points

Hello Don,

Thank you for the query.

Please note the below on TI.com

Limited design support from TI available

This product has limited design support from TI for existing projects. If available, you will find relevant collateral, software and tools in the product folder. For existing designs using this product, you can request support in the TI E2E^TM support forums, but limited support is available for this product.

I would recommend following the datasheet recommendations and choose any of the part.

I would assume the datasheet to be quiet ols and the recommended components may not be active. Refer example below. Please use an equivalent that is recommended or based on the recommended component spec

https://product.tdk.com/en/search/emc/emc/3tf/info?part_no=ACH4518-333-T&gclid=CjwKCAjwrdmhBhBBEiwA4Hx5gye0P7AADgZTgoB625H7opWbsR8K5YniV3JO7nSigdCQE76KNVMg7xoCtOUQAvD_BwE

Regards,

Sreenivasa