TPS62877-Q1: Stackable configuration

Jayden Qiu

Intellectual 1405 points

Part Number: TPS62877-Q1

Tool/software:

Hi team,

This is FAE Jayden, I found below E2E thread:

(+) TPS62877-Q1: Question about stacked mode - Power management forum - Power management - TI E2E support forums

My customer ZTE has similar application, but we just want to know how to realize 4 x stackable configuration. As describe in datasheet, the register can only support 120°.

Many thanks

Brs

Jayden

over 1 year ago

0 Tanvee over 1 year ago

TI__Genius 17421 points

Hi Jayden,

You can use similar approach as shown in datasheet for 3 stack configuration.

All stack devices will have 120 phase shift that means phase would be added to next device (),120,240,.. so on).

Can you share concern ?

Thanks,

Tanvee

0 Jayden Qiu over 1 year ago in reply to Tanvee

TI__Intellectual 1405 points

Hi Tanvee,

So I just need to configure this register as 0b to support 4x stackable. In this way each phase will have 120° phase shift.

Brs

Jayden

0 Tanvee over 1 year ago in reply to Jayden Qiu

TI__Genius 17421 points

Hi Jayden,

Correct. Use same bit for all devices.

Thanks,

Tanvee

0 Jayden Qiu over 1 year ago in reply to Tanvee

TI__Intellectual 1405 points

Hi Tanvee,

Thanks. Can tps62877-Q1 support max 120A output current (avg) for 4xstackable? My customer is evaluating this device in their new optical module project.

The min OCP limit is 29.5A, I guess it's hard to support full 30A output.

Brs

Jayden

0 Tanvee over 1 year ago in reply to Jayden Qiu

TI__Genius 17421 points

Hi Jayden,

It can support 120A but it is generally good to place 20% window. do you know the peak current requirements and project schedule for the application? If it is confidential please share through mail.

Just to understand if we can sugget another devices that can suit better.

Best regards,

Tanvee