TPS22950: TPS22950 RCB clarification

Hi!

ESD Birkenstock said:

RCB threshold according to D/s is ~40mV, so roughly the reverse current limit is 900mA.

Yes, that's correct. 

ESD Birkenstock said:

Q1: To me, I can use this for bidirectional current for say charging Li+ w/ <=500mA without no issue. 

yes, since this won't trigger the RCB

ESD Birkenstock said:

Q2: Can you confirm the below condition satisfies abs max, and that no reverse current will be passed (only leakage, not 900mA thresh).  

VIN: 0 (DC)
VOUT: 0->5V ramp. 
EN: Tied Low

The device should have always on reverse current threshold even when En and Vin are low as long as the Vout-Vin threshold is met. Let me also once verify this on my end. 

ESD Birkenstock said:

Q3: Do you have any broad guidance on using ILIM voltage for rough current sense?

Since this is not designed for monitoring the current but internally will have a sense FET and comparator, this should co-relate with the current through the mainFET. We do not have any existing guideline for this and will recommend you to evaluate this. 

Best Regards,
Arush

Arush Gupta said:

The device should have always on reverse current threshold even when En and Vin are low as long as the Vout-Vin threshold is met. Let me also once verify this on my end. 

Thank you i will wait for your reply, but i hope that when EN is low, Reverse current is always blocked without threshold. 

I know this function is coming from backgate switching and i honestly dont know. 

Hi!

ESD Birkenstock said:

Thank you i will wait for your reply, but i hope that when EN is low, Reverse current is always blocked without threshold. 

I will need some time to verify this at my end. Please expect my next reply by Thursday EOD. 

Best Regards,
Arush