MSP430-SMBUS: Error in application note

PRABHAT RANJAN TRIPATHI

Part Number: MSP430-SMBUS
Other Parts Discussed in Thread: TPS40057

PDF Document in SLAA476B has an error in amplifier connection for the constant current constant voltage implementation. On page 9 and on page 35 have a different connection to the amplifier. Which schematic should be followed??

over 2 years ago

0 Allen Gao over 2 years ago

TI__Expert 7080 points

Hi,

Page35 is the schematic of 40V input circuit. It may depends on your input power. I will help to transfer this to DC/DC team to give you some comment of the power part.

0 PRABHAT RANJAN TRIPATHI over 2 years ago in reply to Allen Gao

Intellectual 701 points

Awaiting response from power team.

0 Daniel Li14 over 2 years ago in reply to PRABHAT RANJAN TRIPATHI

TI__Mastermind 27030 points

pls follow page 35 schematic, as it is a negative feedback system, so the reference should be at positive input of opamp, and the current or voltage signal should be at negative input side

0 PRABHAT RANJAN TRIPATHI over 2 years ago in reply to Daniel Li14

Intellectual 701 points

tHANKS FOR THE CLARIFICATION Daniel Li14. I hope they change the circuit on page 9, as that can be misleading.

I have designed a charger around the same architecture (SLAA476B) but with a different controller IC. Can you please review my charger design? It will be very helpful.