TPS23881: double conform schematic.

Tommy Tzeng

Genius 5780 points

Part Number: TPS23881

Hi Sir,

the attached file is TPA23881 PoE 8-port PSE 90W design schematic, may we learn and help check this schematic from you.

especially the design between MSP430 and TPS23881, if any problem or suggestion please let us know and learn.

Franklin Wireless_90W_poe_pse_2021_1_21.pdf

over 4 years ago

0 Darwin Fernandez over 4 years ago

TI__Mastermind 41770 points

Hi Tommy, I will look into this and get back to you soon. Thanks!

0 Tommy Tzeng over 4 years ago in reply to Darwin Fernandez

Genius 5780 points

Hi Darwin Fernandez,

sir,

ok , looking forward to your reply, thanks.

0 Darwin Fernandez over 4 years ago in reply to Tommy Tzeng

TI__Mastermind 41770 points

Hi Tommy,

A couple comments on the schematic:

Pin 52 on TPS23881 is NC. The resistors and cap can be NI

Be sure RST pin is LOW during power up of VPWR. This is a startup requirement as described in the datasheet.

For the MSP430 schematic, I reviewed the GPIO assignments and they look good for FirmPSE software solution. However, I also recommend reviewing this with the MSP430 team for the other pin functionality. Thanks!

0 Darwin Fernandez over 4 years ago in reply to Darwin Fernandez

TI__Mastermind 41770 points

Hi Tommy, adding to this, I noticed they are NOT using the JTAG like shown in our FirmPSE reference design. I recommend copying what we did in the reference design the JTAG pin are needed to download code onto the MSP430. Or is customer doing a different method like I2C?

0 Tommy Tzeng over 4 years ago in reply to Darwin Fernandez

Genius 5780 points

Hi Darwin Fernandez,

thanks for your reply and help.

customer wil use I2C to load code, and firmPSE user guide has been provided. so i need to inform customer to use JTAG rule?how to do?

0 Darwin Fernandez over 4 years ago in reply to Tommy Tzeng

TI__Mastermind 41770 points

Hi Tommy,

Is customer programming BSL code or BSL + APP code in the factory. Then are they using BSL for updates in the field? Thanks!

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TPS23881: double conform schematic.