TPSM846C23: TPSM846C23

user1105236

Part Number: TPSM846C23
Other Parts Discussed in Thread: TPS546C23

is there something wrong with the discription of the red mark above, about the current measurement accuarcy? +/-3A??? and there is no accuarcy discription about the current below 3A????

dawei

over 6 years ago

0 JohnTucker over 6 years ago

TI__Guru**** 191445 points

That specification is correct. It is the same as the parent IC, TPS546C23.

0 user1105236 over 6 years ago in reply to JohnTucker

Prodigy 30 points

hi John.

so the datasheet means when the current <3A，it cannot be measured out？？because the accuracy is 3A？？？

thanks

dawei

0 JohnTucker over 6 years ago in reply to user1105236

TI__Guru**** 191445 points

The 3A output current measuring accuracy is applicable when load is in the range of 3A to 20A.

When the load current is lower than 3A, the device still can report the load current, the accuracy is not guaranteed by datasheet. From bench test experience, the accuracy is within ±1A when load is lower than 3A.

0 user1105236 over 6 years ago in reply to JohnTucker

Prodigy 30 points

hi john，

so when the load is between 3A and 20A，the accuracy is 3A？？

when the load is lower than3A，the accuracy is around 1A，

the accuracy between 3A and 20A，and below 3A，the accuracy is not good.

am I right？

thanks

best regards

dawei

0 JohnTucker over 6 years ago in reply to user1105236

TI__Guru**** 191445 points

From 0 to 3 A, approx +/- 1 A as measured during bench evaluation. Probably not a statistically relevant sample size, not over temperature.

From 3 to 20 A, tested to +/- 3 A, above 20 A, +/- 15 %. Verified suring IC characterization and guaranteed by datasheet.

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TPSM846C23: TPSM846C23