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bq24120 external VTSB supply

Other Parts Discussed in Thread: BQ24120

Hi E2E forum

We are designing a charger using the bq24120 IC.

Can the VTSB be supplied externally or must we use the internalle generated supply?

The internally generated TS bias voltage has a 10 % regulation, which is too large for our application.

Is there a region of operation for the bq24120 where we can obtain a more accurate regulation of VTSB?

(Perhaps most of the regulation range is at the thermal or load extremes)

If possible please provide a plot of the TS bias voltage regulation accuracy as a function of its governing parameter.

Kind regards

Kasper