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BQ24192 vs BQ25892 / BQ25890

Frank Votteler
Prodigy 10 points
Other Parts Discussed in Thread: BQ24190, BQ25892, BQ24192, BQ25890, BQ25190

Hello, i'm actually using BQ24192 with an external USB recognition chip, because BQ24190 USB recognition is not sufficient for us. I use two paralleled battery packs with two NTC resistors. At the input, I use USB devices or external power supply devices up to 12 V. I found the BQ25892 on the TI homepage and think, that this could be a replacement for BQ24192. My Questions:

- BQ25890 seems to have better USB recognition also working with not standard (i.e. Apple / Android) and standard chargers, is this right?

- can I use two parallel NTC resistors on BQ25190 by changing resistors? The BQ24190 has two NTC inputs while the BQ25890 has only one input.

- can i directly exchange BQ24192 by the BQ25892 (only changing of NTC and controller firmware)? It seems, that the BQ25892 is more efficient, especially when using a 12V power supply. Is this right?

Best regards,

Frank

  • 0
    TI__Guru**** 154206 points
    bq25890 has improved USB detection and, with the exception of pin 12 (TS2) and pin 24 (DSEL) is pin to pin compatible. Pin 12 is now /QON which gives the ability to exit shipmode or can be left floating. Pin 24 can be used to indicate D+/D- detection if pulled up through a resistor or it can be tied to VBUS. You can parallel two NTC thermistors on TS1 by properly sizing the external TS resistors.